diff --git a/api/protos/aggregation/v1/aggregation.proto b/api/protos/aggregation/v1/aggregation.proto
index 68397610..16594e41 100644
--- a/api/protos/aggregation/v1/aggregation.proto
+++ b/api/protos/aggregation/v1/aggregation.proto
@@ -32,6 +32,7 @@ message KeyerConfiguration {
   repeated Fragment fragments = 1 [(validate.rules).repeated.min_items = 1];
 }
 
+// [#next-free-field: 4]
 message StringMatch {
   oneof type {
     option (validate.required) = true;
@@ -46,6 +47,12 @@ message StringMatch {
   }
 }
 
+// [#next-free-field: 2]
+message BoolMatch {
+  bool value_match = 1;
+}
+
+// [#next-free-field: 4]
 message LocalityMatch {
   StringMatch region = 1;
 
@@ -54,6 +61,31 @@ message LocalityMatch {
   StringMatch sub_zone = 3;
 }
 
+// [#next-free-field: 2]
+message PathSegment {
+  string key = 1 [(validate.rules).string.min_len = 1];
+}
+
+// [#next-free-field: 3]
+message StructValueMatch {
+  // TODO: we have to match every single type described in
+  // https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#google.protobuf.Value.
+  oneof match {
+    option (validate.required) = true;
+
+    StringMatch string_match = 1;
+
+    BoolMatch bool_match = 2;
+  }
+}
+
+// [#next-free-field: 3]
+message NodeMetadataMatch {
+  repeated PathSegment path = 1 [(validate.rules).repeated.min_items = 1];
+
+  StructValueMatch match = 2 [(validate.rules).message.required = true];
+}
+
 // This is a recursive structure which allows complex nested match
 // configurations to be built using various logical operators.
 // [#next-free-field: 7]
@@ -68,7 +100,7 @@ message MatchPredicate {
   }
 
   // Match on a field in Envoy's request node.
-  // [#next-free-field: 4]
+  // [#next-free-field: 5]
   message RequestNodeMatch {
     oneof type {
       option (validate.required) = true;
@@ -78,6 +110,8 @@ message MatchPredicate {
       StringMatch cluster_match = 2;
 
       LocalityMatch locality_match = 3;
+
+      NodeMetadataMatch node_metadata_match = 4;
     }
   }
 
@@ -120,8 +154,8 @@ message MatchPredicate {
 // [#next-free-field: 5]
 message ResultPredicate {
 
+  // [#next-free-field: 3]
   message ResultAction {
-
     // TODO potentially use "safe regex"
     // https://github.com/envoyproxy/envoy/blob/10f756efa17e56c8d4d1033be7b4286410db4e01/api/envoy/type/matcher/v3/regex.proto
     // [#next-free-field: 3]
@@ -152,12 +186,20 @@ message ResultPredicate {
     ResultAction subzone_action = 3;
   }
 
+  // [#next-free-field: 3]
+  message NodeMetadataAction {
+    repeated PathSegment path = 1 [(validate.rules).repeated.min_items = 1];
+
+    ResultAction action = 2 [(validate.rules).message.required = true];
+  }
+
+  // [#next-free-field: 2]
   message AndResult {
     repeated ResultPredicate result_predicates = 1 [(validate.rules).repeated.min_items = 2];
   }
 
   // Rules for generating the resulting fragment from a Envoy request node.
-  // [#next-free-field: 4]
+  // [#next-free-field: 5]
   message RequestNodeFragment {
 
     oneof action {
@@ -166,6 +208,7 @@ message ResultPredicate {
       ResultAction id_action = 1;
       ResultAction cluster_action = 2;
       LocalityResultAction locality_action = 3;
+      NodeMetadataAction node_metadata_action = 4;
     }
   }
 
diff --git a/internal/app/mapper/mapper.go b/internal/app/mapper/mapper.go
index 9f38f5cc..9144d86f 100644
--- a/internal/app/mapper/mapper.go
+++ b/internal/app/mapper/mapper.go
@@ -9,6 +9,7 @@ import (
 	v3 "github.com/envoyproxy/go-control-plane/pkg/resource/v3"
 	"github.com/envoyproxy/xds-relay/internal/app/metrics"
 	"github.com/envoyproxy/xds-relay/internal/app/transport"
+	"google.golang.org/protobuf/types/known/structpb"
 
 	"github.com/uber-go/tally"
 
@@ -155,6 +156,11 @@ func isNodeMatch(matchPredicate *matchPredicate, req transport.Request) (bool, e
 		return compareLocality(localityMatch, req.GetLocality())
 	}
 
+	nodeMetadataMatch := predicate.GetNodeMetadataMatch()
+	if nodeMetadataMatch != nil {
+		return compareNodeMetadata(nodeMetadataMatch, req.GetNodeMetadata())
+	}
+
 	return false, fmt.Errorf("RequestNodeMatch is invalid")
 }
 
@@ -287,6 +293,9 @@ func getResultFromRequestNodePredicate(predicate *resultPredicate, req transport
 		resultFragment, err = getResultFragmentFromAction(req.GetCluster(), requestNodeFragment.GetClusterAction())
 	} else if requestNodeFragment.GetLocalityAction() != nil {
 		resultFragment, err = getFragmentFromLocalityAction(req.GetLocality(), requestNodeFragment.GetLocalityAction())
+	} else if requestNodeFragment.GetNodeMetadataAction() != nil {
+		resultFragment, err = getFragmentFromNodeMetadataAction(req.GetNodeMetadata(),
+			requestNodeFragment.GetNodeMetadataAction())
 	}
 
 	if err != nil {
@@ -439,6 +448,27 @@ func getFragmentFromLocalityAction(
 	return strings.Join(matches, "|"), nil
 }
 
+func getFragmentFromNodeMetadataAction(
+	nodeMetadata *structpb.Struct,
+	action *aggregationv1.ResultPredicate_NodeMetadataAction) (string, error) {
+	// Traverse to the right node
+	var value *structpb.Value = nil
+	var ok bool
+	for _, segment := range action.GetPath() {
+		fields := nodeMetadata.GetFields()
+		value, ok = fields[segment.Key]
+		if !ok {
+			// TODO what to do if the key doesn't map to a valid struct field?
+			return "", fmt.Errorf("Path to key is inexistent")
+		}
+		nodeMetadata = value.GetStructValue()
+	}
+
+	// TODO: We need to stringify values other than strings (bool, integers, etc) before
+	// extracting the fragment via a call to getResultFragmentFromAction.
+	return getResultFragmentFromAction(value.GetStringValue(), action.GetAction())
+}
+
 func compareString(stringMatch *aggregationv1.StringMatch, nodeValue string) (bool, error) {
 	if nodeValue == "" {
 		return false, fmt.Errorf("MatchPredicate Node field cannot be empty")
@@ -460,6 +490,10 @@ func compareString(stringMatch *aggregationv1.StringMatch, nodeValue string) (bo
 	return false, nil
 }
 
+func compareBool(boolMatch *aggregationv1.BoolMatch, boolValue bool) bool {
+	return boolMatch.ValueMatch == boolValue
+}
+
 func compareLocality(localityMatch *aggregationv1.LocalityMatch,
 	reqNodeLocality *transport.Locality) (bool, error) {
 	if reqNodeLocality == nil {
@@ -493,3 +527,38 @@ func compareLocality(localityMatch *aggregationv1.LocalityMatch,
 
 	return regionMatch && zoneMatch && subZoneMatch, nil
 }
+
+func compareNodeMetadata(nodeMetadataMatch *aggregationv1.NodeMetadataMatch,
+	nodeMetadata *structpb.Struct) (bool, error) {
+	if nodeMetadata == nil {
+		return false, fmt.Errorf("Metadata Node field cannot be empty")
+	}
+
+	var value *structpb.Value = nil
+	var ok bool
+	for _, segment := range nodeMetadataMatch.GetPath() {
+		// Starting from the second iteration, make sure that we're dealing with structs
+		if value != nil {
+			if value.GetStructValue() != nil {
+				nodeMetadata = value.GetStructValue()
+			} else {
+				// TODO: signal that the field is not a struct
+				return false, nil
+			}
+		}
+		fields := nodeMetadata.GetFields()
+		value, ok = fields[segment.Key]
+		if !ok {
+			return false, nil
+		}
+	}
+
+	// TODO: implement the other structpb.Value types.
+	if nodeMetadataMatch.Match.GetStringMatch() != nil {
+		return compareString(nodeMetadataMatch.Match.GetStringMatch(), value.GetStringValue())
+	} else if nodeMetadataMatch.Match.GetBoolMatch() != nil {
+		return compareBool(nodeMetadataMatch.Match.GetBoolMatch(), value.GetBoolValue()), nil
+	} else {
+		return false, fmt.Errorf("Invalid NodeMetadata Match")
+	}
+}
diff --git a/internal/app/mapper/mapper_test.go b/internal/app/mapper/mapper_test.go
index b55e296b..bccda413 100644
--- a/internal/app/mapper/mapper_test.go
+++ b/internal/app/mapper/mapper_test.go
@@ -11,6 +11,7 @@ import (
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/ginkgo/extensions/table"
 	. "github.com/onsi/gomega"
+	"google.golang.org/protobuf/types/known/structpb"
 )
 
 type KeyerConfiguration = aggregationv1.KeyerConfiguration
@@ -20,6 +21,10 @@ type MatchPredicate = aggregationv1.MatchPredicate
 type ResultPredicate = aggregationv1.ResultPredicate
 type LocalityResultAction = aggregationv1.ResultPredicate_LocalityResultAction
 type StringMatch = aggregationv1.StringMatch
+type BoolMatch = aggregationv1.BoolMatch
+type Struct = structpb.Struct
+type Value = structpb.Value
+type StringValue = structpb.Value_StringValue
 
 const (
 	clusterTypeURL  = "type.googleapis.com/envoy.api.v2.Cluster"
@@ -100,6 +105,33 @@ var positiveTests = []TableEntry{
 			stringFragment,
 		},
 	},
+	{
+		Description: "RequestNodeMatch with single level node metadata bool exact match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataBoolMatch([]string{"bool-field"}, getBoolMatch(true)),
+			getResultStringFragment(),
+			clusterTypeURL,
+			stringFragment,
+		},
+	},
+	{
+		Description: "RequestNodeMatch with nested level node metadata exact match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"nested-field", "f2"}, getExactMatch("v2")),
+			getResultStringFragment(),
+			clusterTypeURL,
+			stringFragment,
+		},
+	},
+	{
+		Description: "RequestNodeMatch with nested level bool node metadata exact match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataBoolMatch([]string{"nested-field", "nested-bool-field"}, getBoolMatch(false)),
+			getResultStringFragment(),
+			clusterTypeURL,
+			stringFragment,
+		},
+	},
 	{
 		Description: "RequestNodeMatch with node id regex match",
 		Parameters: []interface{}{
@@ -118,6 +150,24 @@ var positiveTests = []TableEntry{
 			stringFragment,
 		},
 	},
+	{
+		Description: "RequestNodeMatch with single level node metadata regex match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"f1"}, getRegexMatch("v.")),
+			getResultStringFragment(),
+			clusterTypeURL,
+			stringFragment,
+		},
+	},
+	{
+		Description: "RequestNodeMatch with nested level node metadata regex match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"nested-field", "f2"}, getRegexMatch(".2")),
+			getResultStringFragment(),
+			clusterTypeURL,
+			stringFragment,
+		},
+	},
 	{
 		Description: "AndMatch RequestNodeMatch",
 		Parameters: []interface{}{
@@ -362,6 +412,34 @@ var positiveTests = []TableEntry{
 			fmt.Sprintf("%s|%s", nodezone, nodesubzone),
 		},
 	},
+	{
+		Description: "AnyMatch With Exact Metadata - single level",
+		Parameters: []interface{}{
+			getAnyMatch(true),
+			getResultRequestNodeMetadataFragment(
+				&aggregationv1.ResultPredicate_NodeMetadataAction{
+					Path:   buildPath([]string{"f1"}),
+					Action: getExactAction(),
+				},
+			),
+			clusterTypeURL,
+			"v1",
+		},
+	},
+	{
+		Description: "AnyMatch With Exact Metadata - nested one level",
+		Parameters: []interface{}{
+			getAnyMatch(true),
+			getResultRequestNodeMetadataFragment(
+				&aggregationv1.ResultPredicate_NodeMetadataAction{
+					Path:   buildPath([]string{"nested-field", "f2"}),
+					Action: getExactAction(),
+				},
+			),
+			clusterTypeURL,
+			"v2",
+		},
+	},
 	{
 		Description: "AnyMatch With Regex Locality region, zone, and subzone match",
 		Parameters: []interface{}{
@@ -419,6 +497,34 @@ var positiveTests = []TableEntry{
 			"zone2|subzero",
 		},
 	},
+	{
+		Description: "AnyMatch With Regex Metadata - single level",
+		Parameters: []interface{}{
+			getAnyMatch(true),
+			getResultRequestNodeMetadataFragment(
+				&aggregationv1.ResultPredicate_NodeMetadataAction{
+					Path:   buildPath([]string{"f1"}),
+					Action: getRegexAction("v(.)", "version-$1"),
+				},
+			),
+			clusterTypeURL,
+			"version-1",
+		},
+	},
+	{
+		Description: "AnyMatch With Regex Metadata - nested level",
+		Parameters: []interface{}{
+			getAnyMatch(true),
+			getResultRequestNodeMetadataFragment(
+				&aggregationv1.ResultPredicate_NodeMetadataAction{
+					Path:   buildPath([]string{"nested-field", "f2"}),
+					Action: getRegexAction("v(.)", "version-$1"),
+				},
+			),
+			clusterTypeURL,
+			"version-2",
+		},
+	},
 	{
 		Description: "AnyMatch With result concatenation",
 		Parameters: []interface{}{
@@ -565,6 +671,30 @@ var negativeTests = []TableEntry{
 			getDiscoveryRequest(),
 		},
 	},
+	{
+		Description: "RequestNodeMatch with node metadata single level does not match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"f1"}, getExactMatch("v1-notmatch")),
+			getResultStringFragment(),
+			getDiscoveryRequest(),
+		},
+	},
+	{
+		Description: "RequestNodeMatch with node metadata two levels does not match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"nested-field", "f2"}, getExactMatch("v2-notmatch")),
+			getResultStringFragment(),
+			getDiscoveryRequest(),
+		},
+	},
+	{
+		Description: "RequestNodeMatch with node metadata two levels and inexistent key does not match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"inexistent-key-1", "inexistent-key-2"}, getExactMatch("v2-notmatch")),
+			getResultStringFragment(),
+			getDiscoveryRequest(),
+		},
+	},
 	{
 		Description: "RequestNodeMatch with node id regex does not match",
 		Parameters: []interface{}{
@@ -605,12 +735,28 @@ var negativeTests = []TableEntry{
 			getDiscoveryRequest(),
 		},
 	},
+	{
+		Description: "RequestNodeMatch with node metadata single level regex does not match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"f1"}, getRegexMatch("mismatch")),
+			getResultStringFragment(),
+			getDiscoveryRequest(),
+		},
+	},
+	{
+		Description: "RequestNodeMatch with node metadata two levels regex does not match",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"nested-field", "f2"}, getRegexMatch("mismatch")),
+			getResultStringFragment(),
+			getDiscoveryRequest(),
+		},
+	},
 	{
 		Description: "RequestNodeMatch with exact match request node id mismatch",
 		Parameters: []interface{}{
 			getRequestNodeIDExactMatch(nodeid),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode("mismatch", nodecluster, noderegion, nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode("mismatch", nodecluster, noderegion, nodezone, nodesubzone, nil)),
 		},
 	},
 	{
@@ -618,7 +764,7 @@ var negativeTests = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeIDRegexMatch(nodeid),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode("mismatch", nodecluster, noderegion, nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode("mismatch", nodecluster, noderegion, nodezone, nodesubzone, nil)),
 		},
 	},
 	{
@@ -626,7 +772,7 @@ var negativeTests = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeClusterExactMatch(nodecluster),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode(nodeid, "mismatch", noderegion, nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, "mismatch", noderegion, nodezone, nodesubzone, nil)),
 		},
 	},
 	{
@@ -634,7 +780,7 @@ var negativeTests = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeClusterRegexMatch(nodecluster),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode(nodeid, "mismatch", noderegion, nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, "mismatch", noderegion, nodezone, nodesubzone, nil)),
 		},
 	},
 	{
@@ -642,7 +788,7 @@ var negativeTests = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeLocality(getExactMatch(noderegion), getExactMatch(nodezone), getExactMatch(nodesubzone)),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "mismatch", nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "mismatch", nodezone, nodesubzone, nil)),
 		},
 	},
 	{
@@ -650,7 +796,7 @@ var negativeTests = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeLocality(getExactMatch(noderegion), getExactMatch(nodezone), getExactMatch(nodesubzone)),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, "mismatch", nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, "mismatch", nodesubzone, nil)),
 		},
 	},
 	{
@@ -658,16 +804,47 @@ var negativeTests = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeLocality(getExactMatch(noderegion), getExactMatch(nodezone), getExactMatch(nodesubzone)),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, "mismatch")),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, "mismatch", nil)),
+		},
+	},
+	{
+		Description: "RequestNodeMatch with exact match request node metadata mismatch - single level",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"f1"}, getExactMatch("v1")),
+			getResultStringFragment(),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, nodesubzone, &Struct{
+				Fields: map[string]*Value{
+					"f1": {Kind: &StringValue{StringValue: "mismatch"}},
+				},
+			},
+			)),
+		},
+	},
+	{
+		Description: "RequestNodeMatch with exact match request node metadata mismatch - nested level",
+		Parameters: []interface{}{
+			getRequestNodeMetadataStringMatch([]string{"nested-field", "f2"}, getExactMatch("v2")),
+			getResultStringFragment(),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, nodesubzone, &Struct{
+				Fields: map[string]*Value{
+					"nested-field": {Kind: &structpb.Value_StructValue{
+						StructValue: &Struct{
+							Fields: map[string]*Value{
+								"f2": {Kind: &StringValue{StringValue: "mismatch"}},
+							},
+						},
+					}},
+				},
+			},
+			)),
 		},
 	},
-
 	{
 		Description: "RequestNodeMatch with regex match request node region mismatch",
 		Parameters: []interface{}{
 			getRequestNodeLocality(getRegexMatch(noderegion), getExactMatch(nodezone), getExactMatch(nodesubzone)),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "mismatch", nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "mismatch", nodezone, nodesubzone, nil)),
 		},
 	},
 	{
@@ -675,7 +852,7 @@ var negativeTests = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeLocality(getExactMatch(noderegion), getRegexMatch(nodezone), getExactMatch(nodesubzone)),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, "mismatch", nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, "mismatch", nodesubzone, nil)),
 		},
 	},
 	{
@@ -683,10 +860,9 @@ var negativeTests = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeLocality(getExactMatch(noderegion), getExactMatch(nodezone), getRegexMatch(nodesubzone)),
 			getResultStringFragment(),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, "mismatch")),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, "mismatch", nil)),
 		},
 	},
-
 	{
 		Description: "AndMatch RequestNodeMatch does not match first predicate",
 		Parameters: []interface{}{
@@ -922,7 +1098,7 @@ var emptyFragmentErrorCases = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeIDExactMatch(nodeid),
 			getResultRequestNodeIDFragment(getExactAction()),
-			getDiscoveryRequestWithNode(getNode("", nodecluster, noderegion, nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode("", nodecluster, noderegion, nodezone, nodesubzone, nil)),
 			"MatchPredicate Node field cannot be empty",
 		},
 	},
@@ -931,7 +1107,7 @@ var emptyFragmentErrorCases = []TableEntry{
 		Parameters: []interface{}{
 			getRequestNodeClusterExactMatch(nodecluster),
 			getResultRequestNodeIDFragment(getExactAction()),
-			getDiscoveryRequestWithNode(getNode(nodeid, "", noderegion, nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, "", noderegion, nodezone, nodesubzone, nil)),
 			"MatchPredicate Node field cannot be empty",
 		},
 	},
@@ -942,7 +1118,7 @@ var emptyFragmentErrorCases = []TableEntry{
 			getResultRequestNodeLocalityFragment(&aggregationv1.ResultPredicate_LocalityResultAction{
 				RegionAction: getExactAction(),
 			}),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "", nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "", nodezone, nodesubzone, nil)),
 			"RequestNodeFragment exact match resulted in an empty fragment",
 		},
 	},
@@ -953,7 +1129,7 @@ var emptyFragmentErrorCases = []TableEntry{
 			getResultRequestNodeLocalityFragment(&aggregationv1.ResultPredicate_LocalityResultAction{
 				ZoneAction: getExactAction(),
 			}),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, "", nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, "", nodesubzone, nil)),
 			"RequestNodeFragment exact match resulted in an empty fragment",
 		},
 	},
@@ -964,7 +1140,7 @@ var emptyFragmentErrorCases = []TableEntry{
 			getResultRequestNodeLocalityFragment(&aggregationv1.ResultPredicate_LocalityResultAction{
 				SubzoneAction: getExactAction(),
 			}),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, "")),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, "", nil)),
 			"RequestNodeFragment exact match resulted in an empty fragment",
 		},
 	},
@@ -973,7 +1149,7 @@ var emptyFragmentErrorCases = []TableEntry{
 		Parameters: []interface{}{
 			getAnyMatch(true),
 			getResultRequestNodeIDFragment(getExactAction()),
-			getDiscoveryRequestWithNode(getNode("", nodecluster, noderegion, nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode("", nodecluster, noderegion, nodezone, nodesubzone, nil)),
 			"RequestNodeFragment exact match resulted in an empty fragment",
 		},
 	},
@@ -982,7 +1158,7 @@ var emptyFragmentErrorCases = []TableEntry{
 		Parameters: []interface{}{
 			getAnyMatch(true),
 			getResultRequestNodeClusterFragment(getExactAction()),
-			getDiscoveryRequestWithNode(getNode(nodeid, "", noderegion, nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, "", noderegion, nodezone, nodesubzone, nil)),
 			"RequestNodeFragment exact match resulted in an empty fragment",
 		},
 	},
@@ -993,7 +1169,7 @@ var emptyFragmentErrorCases = []TableEntry{
 			getResultRequestNodeLocalityFragment(&aggregationv1.ResultPredicate_LocalityResultAction{
 				RegionAction: getExactAction(),
 			}),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "", nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "", nodezone, nodesubzone, nil)),
 			"RequestNodeFragment exact match resulted in an empty fragment",
 		},
 	},
@@ -1004,7 +1180,7 @@ var emptyFragmentErrorCases = []TableEntry{
 			getResultRequestNodeLocalityFragment(&aggregationv1.ResultPredicate_LocalityResultAction{
 				ZoneAction: getExactAction(),
 			}),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, "", nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, "", nodesubzone, nil)),
 			"RequestNodeFragment exact match resulted in an empty fragment",
 		},
 	},
@@ -1015,7 +1191,7 @@ var emptyFragmentErrorCases = []TableEntry{
 			getResultRequestNodeLocalityFragment(&aggregationv1.ResultPredicate_LocalityResultAction{
 				SubzoneAction: getExactAction(),
 			}),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, "")),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, "", nil)),
 			"RequestNodeFragment exact match resulted in an empty fragment",
 		},
 	},
@@ -1075,7 +1251,7 @@ var emptyFragmentErrorCases = []TableEntry{
 		Parameters: []interface{}{
 			getAnyMatch(true),
 			getResourceNameFragment(-1, getExactAction()),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "", nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "", nodezone, nodesubzone, nil)),
 			"ResourceNamesFragment.Element cannot be negative or larger than length",
 		},
 	},
@@ -1084,7 +1260,7 @@ var emptyFragmentErrorCases = []TableEntry{
 		Parameters: []interface{}{
 			getAnyMatch(true),
 			getResourceNameFragment(10, getExactAction()),
-			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "", nodezone, nodesubzone)),
+			getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, "", nodezone, nodesubzone, nil)),
 			"ResourceNamesFragment.Element cannot be negative or larger than length",
 		},
 	},
@@ -1361,6 +1537,12 @@ func getRequestNodeClusterRegexMatch(regex string) *MatchPredicate {
 	}
 }
 
+func getBoolMatch(value bool) *BoolMatch {
+	return &aggregationv1.BoolMatch{
+		ValueMatch: value,
+	}
+}
+
 func getExactMatch(exact string) *StringMatch {
 	return &aggregationv1.StringMatch{
 		Type: &aggregationv1.StringMatch_ExactMatch{
@@ -1393,6 +1575,56 @@ func getRequestNodeLocality(region *StringMatch, zone *StringMatch, subZone *Str
 	}
 }
 
+func getRequestNodeMetadataStringMatch(segments []string, stringMatch *StringMatch) *MatchPredicate {
+	pathSegments := buildPath(segments)
+	return &MatchPredicate{
+		Type: &aggregationv1.MatchPredicate_RequestNodeMatch_{
+			RequestNodeMatch: &aggregationv1.MatchPredicate_RequestNodeMatch{
+				Type: &aggregationv1.MatchPredicate_RequestNodeMatch_NodeMetadataMatch{
+					NodeMetadataMatch: &aggregationv1.NodeMetadataMatch{
+						Path: pathSegments,
+						Match: &aggregationv1.StructValueMatch{
+							Match: &aggregationv1.StructValueMatch_StringMatch{
+								StringMatch: stringMatch,
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+func getRequestNodeMetadataBoolMatch(segments []string, boolMatch *BoolMatch) *MatchPredicate {
+	pathSegments := buildPath(segments)
+	return &MatchPredicate{
+		Type: &aggregationv1.MatchPredicate_RequestNodeMatch_{
+			RequestNodeMatch: &aggregationv1.MatchPredicate_RequestNodeMatch{
+				Type: &aggregationv1.MatchPredicate_RequestNodeMatch_NodeMetadataMatch{
+					NodeMetadataMatch: &aggregationv1.NodeMetadataMatch{
+						Path: pathSegments,
+						Match: &aggregationv1.StructValueMatch{
+							Match: &aggregationv1.StructValueMatch_BoolMatch{
+								BoolMatch: boolMatch,
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+func buildPath(segments []string) []*aggregationv1.PathSegment {
+	pathSegments := make([]*aggregationv1.PathSegment, len(segments))
+	for i, s := range segments {
+		pathSegments[i] = &aggregationv1.PathSegment{
+			Key: s,
+		}
+	}
+	return pathSegments
+}
+
 func getRequestNodeAndMatch(predicates []*MatchPredicate) *MatchPredicate {
 	return &MatchPredicate{
 		Type: &aggregationv1.MatchPredicate_AndMatch{
@@ -1550,6 +1782,18 @@ func getResultRequestNodeLocalityFragment(action *aggregationv1.ResultPredicate_
 	}
 }
 
+func getResultRequestNodeMetadataFragment(action *aggregationv1.ResultPredicate_NodeMetadataAction) *resultPredicate {
+	return &ResultPredicate{
+		Type: &aggregationv1.ResultPredicate_RequestNodeFragment_{
+			RequestNodeFragment: &aggregationv1.ResultPredicate_RequestNodeFragment{
+				Action: &aggregationv1.ResultPredicate_RequestNodeFragment_NodeMetadataAction{
+					NodeMetadataAction: action,
+				},
+			},
+		},
+	}
+}
+
 func getExactAction() *aggregationv1.ResultPredicate_ResultAction {
 	return &aggregationv1.ResultPredicate_ResultAction{
 		Action: &aggregationv1.ResultPredicate_ResultAction_Exact{
@@ -1570,7 +1814,7 @@ func getRegexAction(pattern string, replace string) *aggregationv1.ResultPredica
 }
 
 func getDiscoveryRequest() *v2.DiscoveryRequest {
-	return getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, nodesubzone))
+	return getDiscoveryRequestWithNode(getNode(nodeid, nodecluster, noderegion, nodezone, nodesubzone, getNodeMetatada()))
 }
 
 func getDiscoveryRequestWithNode(node *core.Node) *v2.DiscoveryRequest {
@@ -1582,7 +1826,8 @@ func getDiscoveryRequestWithNode(node *core.Node) *v2.DiscoveryRequest {
 	}
 }
 
-func getNode(id string, cluster string, region string, zone string, subzone string) *core.Node {
+func getNode(id string, cluster string, region string, zone string, subzone string,
+	nodeMetadata *structpb.Struct) *core.Node {
 	return &core.Node{
 		Id:      id,
 		Cluster: cluster,
@@ -1591,5 +1836,23 @@ func getNode(id string, cluster string, region string, zone string, subzone stri
 			Zone:    zone,
 			SubZone: subzone,
 		},
+		Metadata: nodeMetadata,
+	}
+}
+
+func getNodeMetatada() *structpb.Struct {
+	return &Struct{
+		Fields: map[string]*Value{
+			"bool-field": {Kind: &structpb.Value_BoolValue{BoolValue: true}},
+			"f1":         {Kind: &StringValue{StringValue: "v1"}},
+			"nested-field": {Kind: &structpb.Value_StructValue{
+				StructValue: &Struct{
+					Fields: map[string]*Value{
+						"f2":                {Kind: &StringValue{StringValue: "v2"}},
+						"nested-bool-field": {Kind: &structpb.Value_BoolValue{BoolValue: false}},
+					},
+				},
+			}},
+		},
 	}
 }
diff --git a/pkg/api/aggregation/v1/aggregation.pb.go b/pkg/api/aggregation/v1/aggregation.pb.go
index de824677..b64f3ebb 100644
--- a/pkg/api/aggregation/v1/aggregation.pb.go
+++ b/pkg/api/aggregation/v1/aggregation.pb.go
@@ -75,6 +75,7 @@ func (x *KeyerConfiguration) GetFragments() []*KeyerConfiguration_Fragment {
 	return nil
 }
 
+// [#next-free-field: 4]
 type StringMatch struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -159,6 +160,55 @@ func (*StringMatch_ExactMatch) isStringMatch_Type() {}
 
 func (*StringMatch_RegexMatch) isStringMatch_Type() {}
 
+// [#next-free-field: 2]
+type BoolMatch struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ValueMatch bool `protobuf:"varint,1,opt,name=value_match,json=valueMatch,proto3" json:"value_match,omitempty"`
+}
+
+func (x *BoolMatch) Reset() {
+	*x = BoolMatch{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BoolMatch) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BoolMatch) ProtoMessage() {}
+
+func (x *BoolMatch) ProtoReflect() protoreflect.Message {
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BoolMatch.ProtoReflect.Descriptor instead.
+func (*BoolMatch) Descriptor() ([]byte, []int) {
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *BoolMatch) GetValueMatch() bool {
+	if x != nil {
+		return x.ValueMatch
+	}
+	return false
+}
+
+// [#next-free-field: 4]
 type LocalityMatch struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -172,7 +222,7 @@ type LocalityMatch struct {
 func (x *LocalityMatch) Reset() {
 	*x = LocalityMatch{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[2]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -185,7 +235,7 @@ func (x *LocalityMatch) String() string {
 func (*LocalityMatch) ProtoMessage() {}
 
 func (x *LocalityMatch) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[2]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -198,7 +248,7 @@ func (x *LocalityMatch) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LocalityMatch.ProtoReflect.Descriptor instead.
 func (*LocalityMatch) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{2}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *LocalityMatch) GetRegion() *StringMatch {
@@ -222,6 +272,194 @@ func (x *LocalityMatch) GetSubZone() *StringMatch {
 	return nil
 }
 
+// [#next-free-field: 2]
+type PathSegment struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Key string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
+}
+
+func (x *PathSegment) Reset() {
+	*x = PathSegment{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *PathSegment) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*PathSegment) ProtoMessage() {}
+
+func (x *PathSegment) ProtoReflect() protoreflect.Message {
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use PathSegment.ProtoReflect.Descriptor instead.
+func (*PathSegment) Descriptor() ([]byte, []int) {
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *PathSegment) GetKey() string {
+	if x != nil {
+		return x.Key
+	}
+	return ""
+}
+
+// [#next-free-field: 3]
+type StructValueMatch struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// TODO: we have to match every single type described in
+	// https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#google.protobuf.Value.
+	//
+	// Types that are assignable to Match:
+	//	*StructValueMatch_StringMatch
+	//	*StructValueMatch_BoolMatch
+	Match isStructValueMatch_Match `protobuf_oneof:"match"`
+}
+
+func (x *StructValueMatch) Reset() {
+	*x = StructValueMatch{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *StructValueMatch) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*StructValueMatch) ProtoMessage() {}
+
+func (x *StructValueMatch) ProtoReflect() protoreflect.Message {
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use StructValueMatch.ProtoReflect.Descriptor instead.
+func (*StructValueMatch) Descriptor() ([]byte, []int) {
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{5}
+}
+
+func (m *StructValueMatch) GetMatch() isStructValueMatch_Match {
+	if m != nil {
+		return m.Match
+	}
+	return nil
+}
+
+func (x *StructValueMatch) GetStringMatch() *StringMatch {
+	if x, ok := x.GetMatch().(*StructValueMatch_StringMatch); ok {
+		return x.StringMatch
+	}
+	return nil
+}
+
+func (x *StructValueMatch) GetBoolMatch() *BoolMatch {
+	if x, ok := x.GetMatch().(*StructValueMatch_BoolMatch); ok {
+		return x.BoolMatch
+	}
+	return nil
+}
+
+type isStructValueMatch_Match interface {
+	isStructValueMatch_Match()
+}
+
+type StructValueMatch_StringMatch struct {
+	StringMatch *StringMatch `protobuf:"bytes,1,opt,name=string_match,json=stringMatch,proto3,oneof"`
+}
+
+type StructValueMatch_BoolMatch struct {
+	BoolMatch *BoolMatch `protobuf:"bytes,2,opt,name=bool_match,json=boolMatch,proto3,oneof"`
+}
+
+func (*StructValueMatch_StringMatch) isStructValueMatch_Match() {}
+
+func (*StructValueMatch_BoolMatch) isStructValueMatch_Match() {}
+
+// [#next-free-field: 3]
+type NodeMetadataMatch struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Path  []*PathSegment    `protobuf:"bytes,1,rep,name=path,proto3" json:"path,omitempty"`
+	Match *StructValueMatch `protobuf:"bytes,2,opt,name=match,proto3" json:"match,omitempty"`
+}
+
+func (x *NodeMetadataMatch) Reset() {
+	*x = NodeMetadataMatch{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *NodeMetadataMatch) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*NodeMetadataMatch) ProtoMessage() {}
+
+func (x *NodeMetadataMatch) ProtoReflect() protoreflect.Message {
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[6]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use NodeMetadataMatch.ProtoReflect.Descriptor instead.
+func (*NodeMetadataMatch) Descriptor() ([]byte, []int) {
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *NodeMetadataMatch) GetPath() []*PathSegment {
+	if x != nil {
+		return x.Path
+	}
+	return nil
+}
+
+func (x *NodeMetadataMatch) GetMatch() *StructValueMatch {
+	if x != nil {
+		return x.Match
+	}
+	return nil
+}
+
 // This is a recursive structure which allows complex nested match
 // configurations to be built using various logical operators.
 // [#next-free-field: 7]
@@ -243,7 +481,7 @@ type MatchPredicate struct {
 func (x *MatchPredicate) Reset() {
 	*x = MatchPredicate{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[3]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -256,7 +494,7 @@ func (x *MatchPredicate) String() string {
 func (*MatchPredicate) ProtoMessage() {}
 
 func (x *MatchPredicate) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[3]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -269,7 +507,7 @@ func (x *MatchPredicate) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MatchPredicate.ProtoReflect.Descriptor instead.
 func (*MatchPredicate) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{3}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{7}
 }
 
 func (m *MatchPredicate) GetType() isMatchPredicate_Type {
@@ -390,7 +628,7 @@ type ResultPredicate struct {
 func (x *ResultPredicate) Reset() {
 	*x = ResultPredicate{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[4]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -403,7 +641,7 @@ func (x *ResultPredicate) String() string {
 func (*ResultPredicate) ProtoMessage() {}
 
 func (x *ResultPredicate) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[4]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -416,7 +654,7 @@ func (x *ResultPredicate) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ResultPredicate.ProtoReflect.Descriptor instead.
 func (*ResultPredicate) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{4}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{8}
 }
 
 func (m *ResultPredicate) GetType() isResultPredicate_Type {
@@ -500,7 +738,7 @@ type KeyerConfiguration_Fragment struct {
 func (x *KeyerConfiguration_Fragment) Reset() {
 	*x = KeyerConfiguration_Fragment{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[5]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -513,7 +751,7 @@ func (x *KeyerConfiguration_Fragment) String() string {
 func (*KeyerConfiguration_Fragment) ProtoMessage() {}
 
 func (x *KeyerConfiguration_Fragment) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[5]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -553,7 +791,7 @@ type KeyerConfiguration_Fragment_Rule struct {
 func (x *KeyerConfiguration_Fragment_Rule) Reset() {
 	*x = KeyerConfiguration_Fragment_Rule{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[6]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -566,7 +804,7 @@ func (x *KeyerConfiguration_Fragment_Rule) String() string {
 func (*KeyerConfiguration_Fragment_Rule) ProtoMessage() {}
 
 func (x *KeyerConfiguration_Fragment_Rule) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[6]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -611,7 +849,7 @@ type MatchPredicate_RequestTypeMatch struct {
 func (x *MatchPredicate_RequestTypeMatch) Reset() {
 	*x = MatchPredicate_RequestTypeMatch{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[7]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -624,7 +862,7 @@ func (x *MatchPredicate_RequestTypeMatch) String() string {
 func (*MatchPredicate_RequestTypeMatch) ProtoMessage() {}
 
 func (x *MatchPredicate_RequestTypeMatch) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[7]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -637,7 +875,7 @@ func (x *MatchPredicate_RequestTypeMatch) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MatchPredicate_RequestTypeMatch.ProtoReflect.Descriptor instead.
 func (*MatchPredicate_RequestTypeMatch) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{3, 0}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{7, 0}
 }
 
 func (x *MatchPredicate_RequestTypeMatch) GetTypes() []string {
@@ -648,7 +886,7 @@ func (x *MatchPredicate_RequestTypeMatch) GetTypes() []string {
 }
 
 // Match on a field in Envoy's request node.
-// [#next-free-field: 4]
+// [#next-free-field: 5]
 type MatchPredicate_RequestNodeMatch struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -658,13 +896,14 @@ type MatchPredicate_RequestNodeMatch struct {
 	//	*MatchPredicate_RequestNodeMatch_IdMatch
 	//	*MatchPredicate_RequestNodeMatch_ClusterMatch
 	//	*MatchPredicate_RequestNodeMatch_LocalityMatch
+	//	*MatchPredicate_RequestNodeMatch_NodeMetadataMatch
 	Type isMatchPredicate_RequestNodeMatch_Type `protobuf_oneof:"type"`
 }
 
 func (x *MatchPredicate_RequestNodeMatch) Reset() {
 	*x = MatchPredicate_RequestNodeMatch{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[8]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -677,7 +916,7 @@ func (x *MatchPredicate_RequestNodeMatch) String() string {
 func (*MatchPredicate_RequestNodeMatch) ProtoMessage() {}
 
 func (x *MatchPredicate_RequestNodeMatch) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[8]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -690,7 +929,7 @@ func (x *MatchPredicate_RequestNodeMatch) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MatchPredicate_RequestNodeMatch.ProtoReflect.Descriptor instead.
 func (*MatchPredicate_RequestNodeMatch) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{3, 1}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{7, 1}
 }
 
 func (m *MatchPredicate_RequestNodeMatch) GetType() isMatchPredicate_RequestNodeMatch_Type {
@@ -721,6 +960,13 @@ func (x *MatchPredicate_RequestNodeMatch) GetLocalityMatch() *LocalityMatch {
 	return nil
 }
 
+func (x *MatchPredicate_RequestNodeMatch) GetNodeMetadataMatch() *NodeMetadataMatch {
+	if x, ok := x.GetType().(*MatchPredicate_RequestNodeMatch_NodeMetadataMatch); ok {
+		return x.NodeMetadataMatch
+	}
+	return nil
+}
+
 type isMatchPredicate_RequestNodeMatch_Type interface {
 	isMatchPredicate_RequestNodeMatch_Type()
 }
@@ -737,12 +983,18 @@ type MatchPredicate_RequestNodeMatch_LocalityMatch struct {
 	LocalityMatch *LocalityMatch `protobuf:"bytes,3,opt,name=locality_match,json=localityMatch,proto3,oneof"`
 }
 
+type MatchPredicate_RequestNodeMatch_NodeMetadataMatch struct {
+	NodeMetadataMatch *NodeMetadataMatch `protobuf:"bytes,4,opt,name=node_metadata_match,json=nodeMetadataMatch,proto3,oneof"`
+}
+
 func (*MatchPredicate_RequestNodeMatch_IdMatch) isMatchPredicate_RequestNodeMatch_Type() {}
 
 func (*MatchPredicate_RequestNodeMatch_ClusterMatch) isMatchPredicate_RequestNodeMatch_Type() {}
 
 func (*MatchPredicate_RequestNodeMatch_LocalityMatch) isMatchPredicate_RequestNodeMatch_Type() {}
 
+func (*MatchPredicate_RequestNodeMatch_NodeMetadataMatch) isMatchPredicate_RequestNodeMatch_Type() {}
+
 // A set of match configurations used for logical operations.
 // [#next-free-field: 2]
 type MatchPredicate_MatchSet struct {
@@ -757,7 +1009,7 @@ type MatchPredicate_MatchSet struct {
 func (x *MatchPredicate_MatchSet) Reset() {
 	*x = MatchPredicate_MatchSet{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[9]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -770,7 +1022,7 @@ func (x *MatchPredicate_MatchSet) String() string {
 func (*MatchPredicate_MatchSet) ProtoMessage() {}
 
 func (x *MatchPredicate_MatchSet) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[9]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -783,7 +1035,7 @@ func (x *MatchPredicate_MatchSet) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MatchPredicate_MatchSet.ProtoReflect.Descriptor instead.
 func (*MatchPredicate_MatchSet) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{3, 2}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{7, 2}
 }
 
 func (x *MatchPredicate_MatchSet) GetRules() []*MatchPredicate {
@@ -793,6 +1045,7 @@ func (x *MatchPredicate_MatchSet) GetRules() []*MatchPredicate {
 	return nil
 }
 
+// [#next-free-field: 3]
 type ResultPredicate_ResultAction struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -807,7 +1060,7 @@ type ResultPredicate_ResultAction struct {
 func (x *ResultPredicate_ResultAction) Reset() {
 	*x = ResultPredicate_ResultAction{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[10]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[14]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -820,7 +1073,7 @@ func (x *ResultPredicate_ResultAction) String() string {
 func (*ResultPredicate_ResultAction) ProtoMessage() {}
 
 func (x *ResultPredicate_ResultAction) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[10]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[14]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -833,7 +1086,7 @@ func (x *ResultPredicate_ResultAction) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ResultPredicate_ResultAction.ProtoReflect.Descriptor instead.
 func (*ResultPredicate_ResultAction) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{4, 0}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{8, 0}
 }
 
 func (m *ResultPredicate_ResultAction) GetAction() isResultPredicate_ResultAction_Action {
@@ -890,7 +1143,7 @@ type ResultPredicate_LocalityResultAction struct {
 func (x *ResultPredicate_LocalityResultAction) Reset() {
 	*x = ResultPredicate_LocalityResultAction{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[11]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[15]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -903,7 +1156,7 @@ func (x *ResultPredicate_LocalityResultAction) String() string {
 func (*ResultPredicate_LocalityResultAction) ProtoMessage() {}
 
 func (x *ResultPredicate_LocalityResultAction) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[11]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[15]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -916,7 +1169,7 @@ func (x *ResultPredicate_LocalityResultAction) ProtoReflect() protoreflect.Messa
 
 // Deprecated: Use ResultPredicate_LocalityResultAction.ProtoReflect.Descriptor instead.
 func (*ResultPredicate_LocalityResultAction) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{4, 1}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{8, 1}
 }
 
 func (x *ResultPredicate_LocalityResultAction) GetRegionAction() *ResultPredicate_ResultAction {
@@ -940,6 +1193,63 @@ func (x *ResultPredicate_LocalityResultAction) GetSubzoneAction() *ResultPredica
 	return nil
 }
 
+// [#next-free-field: 3]
+type ResultPredicate_NodeMetadataAction struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Path   []*PathSegment                `protobuf:"bytes,1,rep,name=path,proto3" json:"path,omitempty"`
+	Action *ResultPredicate_ResultAction `protobuf:"bytes,2,opt,name=action,proto3" json:"action,omitempty"`
+}
+
+func (x *ResultPredicate_NodeMetadataAction) Reset() {
+	*x = ResultPredicate_NodeMetadataAction{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[16]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ResultPredicate_NodeMetadataAction) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ResultPredicate_NodeMetadataAction) ProtoMessage() {}
+
+func (x *ResultPredicate_NodeMetadataAction) ProtoReflect() protoreflect.Message {
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[16]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ResultPredicate_NodeMetadataAction.ProtoReflect.Descriptor instead.
+func (*ResultPredicate_NodeMetadataAction) Descriptor() ([]byte, []int) {
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{8, 2}
+}
+
+func (x *ResultPredicate_NodeMetadataAction) GetPath() []*PathSegment {
+	if x != nil {
+		return x.Path
+	}
+	return nil
+}
+
+func (x *ResultPredicate_NodeMetadataAction) GetAction() *ResultPredicate_ResultAction {
+	if x != nil {
+		return x.Action
+	}
+	return nil
+}
+
+// [#next-free-field: 2]
 type ResultPredicate_AndResult struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -951,7 +1261,7 @@ type ResultPredicate_AndResult struct {
 func (x *ResultPredicate_AndResult) Reset() {
 	*x = ResultPredicate_AndResult{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[12]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -964,7 +1274,7 @@ func (x *ResultPredicate_AndResult) String() string {
 func (*ResultPredicate_AndResult) ProtoMessage() {}
 
 func (x *ResultPredicate_AndResult) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[12]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -977,7 +1287,7 @@ func (x *ResultPredicate_AndResult) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ResultPredicate_AndResult.ProtoReflect.Descriptor instead.
 func (*ResultPredicate_AndResult) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{4, 2}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{8, 3}
 }
 
 func (x *ResultPredicate_AndResult) GetResultPredicates() []*ResultPredicate {
@@ -988,7 +1298,7 @@ func (x *ResultPredicate_AndResult) GetResultPredicates() []*ResultPredicate {
 }
 
 // Rules for generating the resulting fragment from a Envoy request node.
-// [#next-free-field: 4]
+// [#next-free-field: 5]
 type ResultPredicate_RequestNodeFragment struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -998,13 +1308,14 @@ type ResultPredicate_RequestNodeFragment struct {
 	//	*ResultPredicate_RequestNodeFragment_IdAction
 	//	*ResultPredicate_RequestNodeFragment_ClusterAction
 	//	*ResultPredicate_RequestNodeFragment_LocalityAction
+	//	*ResultPredicate_RequestNodeFragment_NodeMetadataAction
 	Action isResultPredicate_RequestNodeFragment_Action `protobuf_oneof:"action"`
 }
 
 func (x *ResultPredicate_RequestNodeFragment) Reset() {
 	*x = ResultPredicate_RequestNodeFragment{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[13]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[18]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1017,7 +1328,7 @@ func (x *ResultPredicate_RequestNodeFragment) String() string {
 func (*ResultPredicate_RequestNodeFragment) ProtoMessage() {}
 
 func (x *ResultPredicate_RequestNodeFragment) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[13]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[18]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1030,7 +1341,7 @@ func (x *ResultPredicate_RequestNodeFragment) ProtoReflect() protoreflect.Messag
 
 // Deprecated: Use ResultPredicate_RequestNodeFragment.ProtoReflect.Descriptor instead.
 func (*ResultPredicate_RequestNodeFragment) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{4, 3}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{8, 4}
 }
 
 func (m *ResultPredicate_RequestNodeFragment) GetAction() isResultPredicate_RequestNodeFragment_Action {
@@ -1061,6 +1372,13 @@ func (x *ResultPredicate_RequestNodeFragment) GetLocalityAction() *ResultPredica
 	return nil
 }
 
+func (x *ResultPredicate_RequestNodeFragment) GetNodeMetadataAction() *ResultPredicate_NodeMetadataAction {
+	if x, ok := x.GetAction().(*ResultPredicate_RequestNodeFragment_NodeMetadataAction); ok {
+		return x.NodeMetadataAction
+	}
+	return nil
+}
+
 type isResultPredicate_RequestNodeFragment_Action interface {
 	isResultPredicate_RequestNodeFragment_Action()
 }
@@ -1077,6 +1395,10 @@ type ResultPredicate_RequestNodeFragment_LocalityAction struct {
 	LocalityAction *ResultPredicate_LocalityResultAction `protobuf:"bytes,3,opt,name=locality_action,json=localityAction,proto3,oneof"`
 }
 
+type ResultPredicate_RequestNodeFragment_NodeMetadataAction struct {
+	NodeMetadataAction *ResultPredicate_NodeMetadataAction `protobuf:"bytes,4,opt,name=node_metadata_action,json=nodeMetadataAction,proto3,oneof"`
+}
+
 func (*ResultPredicate_RequestNodeFragment_IdAction) isResultPredicate_RequestNodeFragment_Action() {}
 
 func (*ResultPredicate_RequestNodeFragment_ClusterAction) isResultPredicate_RequestNodeFragment_Action() {
@@ -1085,6 +1407,9 @@ func (*ResultPredicate_RequestNodeFragment_ClusterAction) isResultPredicate_Requ
 func (*ResultPredicate_RequestNodeFragment_LocalityAction) isResultPredicate_RequestNodeFragment_Action() {
 }
 
+func (*ResultPredicate_RequestNodeFragment_NodeMetadataAction) isResultPredicate_RequestNodeFragment_Action() {
+}
+
 // Rules for generating the resulting fragment from Envoy request names.
 // [#next-free-field: 3]
 type ResultPredicate_ResourceNamesFragment struct {
@@ -1101,7 +1426,7 @@ type ResultPredicate_ResourceNamesFragment struct {
 func (x *ResultPredicate_ResourceNamesFragment) Reset() {
 	*x = ResultPredicate_ResourceNamesFragment{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[14]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[19]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1114,7 +1439,7 @@ func (x *ResultPredicate_ResourceNamesFragment) String() string {
 func (*ResultPredicate_ResourceNamesFragment) ProtoMessage() {}
 
 func (x *ResultPredicate_ResourceNamesFragment) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[14]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[19]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1127,7 +1452,7 @@ func (x *ResultPredicate_ResourceNamesFragment) ProtoReflect() protoreflect.Mess
 
 // Deprecated: Use ResultPredicate_ResourceNamesFragment.ProtoReflect.Descriptor instead.
 func (*ResultPredicate_ResourceNamesFragment) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{4, 4}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{8, 5}
 }
 
 func (x *ResultPredicate_ResourceNamesFragment) GetElement() int32 {
@@ -1159,7 +1484,7 @@ type ResultPredicate_ResultAction_RegexAction struct {
 func (x *ResultPredicate_ResultAction_RegexAction) Reset() {
 	*x = ResultPredicate_ResultAction_RegexAction{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_aggregation_v1_aggregation_proto_msgTypes[15]
+		mi := &file_aggregation_v1_aggregation_proto_msgTypes[20]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1172,7 +1497,7 @@ func (x *ResultPredicate_ResultAction_RegexAction) String() string {
 func (*ResultPredicate_ResultAction_RegexAction) ProtoMessage() {}
 
 func (x *ResultPredicate_ResultAction_RegexAction) ProtoReflect() protoreflect.Message {
-	mi := &file_aggregation_v1_aggregation_proto_msgTypes[15]
+	mi := &file_aggregation_v1_aggregation_proto_msgTypes[20]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1185,7 +1510,7 @@ func (x *ResultPredicate_ResultAction_RegexAction) ProtoReflect() protoreflect.M
 
 // Deprecated: Use ResultPredicate_ResultAction_RegexAction.ProtoReflect.Descriptor instead.
 func (*ResultPredicate_ResultAction_RegexAction) Descriptor() ([]byte, []int) {
-	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{4, 0, 0}
+	return file_aggregation_v1_aggregation_proto_rawDescGZIP(), []int{8, 0, 0}
 }
 
 func (x *ResultPredicate_ResultAction_RegexAction) GetPattern() string {
@@ -1236,17 +1561,41 @@ var file_aggregation_v1_aggregation_proto_rawDesc = []byte{
 	0x4d, 0x61, 0x74, 0x63, 0x68, 0x12, 0x21, 0x0a, 0x0b, 0x72, 0x65, 0x67, 0x65, 0x78, 0x5f, 0x6d,
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 }
 
 var (
@@ -1401,59 +1771,72 @@ func file_aggregation_v1_aggregation_proto_rawDescGZIP() []byte {
 	return file_aggregation_v1_aggregation_proto_rawDescData
 }
 
-var file_aggregation_v1_aggregation_proto_msgTypes = make([]protoimpl.MessageInfo, 16)
+var file_aggregation_v1_aggregation_proto_msgTypes = make([]protoimpl.MessageInfo, 21)
 var file_aggregation_v1_aggregation_proto_goTypes = []interface{}{
 	(*KeyerConfiguration)(nil),                       // 0: aggregation.KeyerConfiguration
 	(*StringMatch)(nil),                              // 1: aggregation.StringMatch
-	(*LocalityMatch)(nil),                            // 2: aggregation.LocalityMatch
-	(*MatchPredicate)(nil),                           // 3: aggregation.MatchPredicate
-	(*ResultPredicate)(nil),                          // 4: aggregation.ResultPredicate
-	(*KeyerConfiguration_Fragment)(nil),              // 5: aggregation.KeyerConfiguration.Fragment
-	(*KeyerConfiguration_Fragment_Rule)(nil),         // 6: aggregation.KeyerConfiguration.Fragment.Rule
-	(*MatchPredicate_RequestTypeMatch)(nil),          // 7: aggregation.MatchPredicate.RequestTypeMatch
-	(*MatchPredicate_RequestNodeMatch)(nil),          // 8: aggregation.MatchPredicate.RequestNodeMatch
-	(*MatchPredicate_MatchSet)(nil),                  // 9: aggregation.MatchPredicate.MatchSet
-	(*ResultPredicate_ResultAction)(nil),             // 10: aggregation.ResultPredicate.ResultAction
-	(*ResultPredicate_LocalityResultAction)(nil),     // 11: aggregation.ResultPredicate.LocalityResultAction
-	(*ResultPredicate_AndResult)(nil),                // 12: aggregation.ResultPredicate.AndResult
-	(*ResultPredicate_RequestNodeFragment)(nil),      // 13: aggregation.ResultPredicate.RequestNodeFragment
-	(*ResultPredicate_ResourceNamesFragment)(nil),    // 14: aggregation.ResultPredicate.ResourceNamesFragment
-	(*ResultPredicate_ResultAction_RegexAction)(nil), // 15: aggregation.ResultPredicate.ResultAction.RegexAction
+	(*BoolMatch)(nil),                                // 2: aggregation.BoolMatch
+	(*LocalityMatch)(nil),                            // 3: aggregation.LocalityMatch
+	(*PathSegment)(nil),                              // 4: aggregation.PathSegment
+	(*StructValueMatch)(nil),                         // 5: aggregation.StructValueMatch
+	(*NodeMetadataMatch)(nil),                        // 6: aggregation.NodeMetadataMatch
+	(*MatchPredicate)(nil),                           // 7: aggregation.MatchPredicate
+	(*ResultPredicate)(nil),                          // 8: aggregation.ResultPredicate
+	(*KeyerConfiguration_Fragment)(nil),              // 9: aggregation.KeyerConfiguration.Fragment
+	(*KeyerConfiguration_Fragment_Rule)(nil),         // 10: aggregation.KeyerConfiguration.Fragment.Rule
+	(*MatchPredicate_RequestTypeMatch)(nil),          // 11: aggregation.MatchPredicate.RequestTypeMatch
+	(*MatchPredicate_RequestNodeMatch)(nil),          // 12: aggregation.MatchPredicate.RequestNodeMatch
+	(*MatchPredicate_MatchSet)(nil),                  // 13: aggregation.MatchPredicate.MatchSet
+	(*ResultPredicate_ResultAction)(nil),             // 14: aggregation.ResultPredicate.ResultAction
+	(*ResultPredicate_LocalityResultAction)(nil),     // 15: aggregation.ResultPredicate.LocalityResultAction
+	(*ResultPredicate_NodeMetadataAction)(nil),       // 16: aggregation.ResultPredicate.NodeMetadataAction
+	(*ResultPredicate_AndResult)(nil),                // 17: aggregation.ResultPredicate.AndResult
+	(*ResultPredicate_RequestNodeFragment)(nil),      // 18: aggregation.ResultPredicate.RequestNodeFragment
+	(*ResultPredicate_ResourceNamesFragment)(nil),    // 19: aggregation.ResultPredicate.ResourceNamesFragment
+	(*ResultPredicate_ResultAction_RegexAction)(nil), // 20: aggregation.ResultPredicate.ResultAction.RegexAction
 }
 var file_aggregation_v1_aggregation_proto_depIdxs = []int32{
-	5,  // 0: aggregation.KeyerConfiguration.fragments:type_name -> aggregation.KeyerConfiguration.Fragment
+	9,  // 0: aggregation.KeyerConfiguration.fragments:type_name -> aggregation.KeyerConfiguration.Fragment
 	1,  // 1: aggregation.LocalityMatch.region:type_name -> aggregation.StringMatch
 	1,  // 2: aggregation.LocalityMatch.zone:type_name -> aggregation.StringMatch
 	1,  // 3: aggregation.LocalityMatch.sub_zone:type_name -> aggregation.StringMatch
-	9,  // 4: aggregation.MatchPredicate.and_match:type_name -> aggregation.MatchPredicate.MatchSet
-	9,  // 5: aggregation.MatchPredicate.or_match:type_name -> aggregation.MatchPredicate.MatchSet
-	3,  // 6: aggregation.MatchPredicate.not_match:type_name -> aggregation.MatchPredicate
-	7,  // 7: aggregation.MatchPredicate.request_type_match:type_name -> aggregation.MatchPredicate.RequestTypeMatch
-	8,  // 8: aggregation.MatchPredicate.request_node_match:type_name -> aggregation.MatchPredicate.RequestNodeMatch
-	12, // 9: aggregation.ResultPredicate.and_result:type_name -> aggregation.ResultPredicate.AndResult
-	13, // 10: aggregation.ResultPredicate.request_node_fragment:type_name -> aggregation.ResultPredicate.RequestNodeFragment
-	14, // 11: aggregation.ResultPredicate.resource_names_fragment:type_name -> aggregation.ResultPredicate.ResourceNamesFragment
-	6,  // 12: aggregation.KeyerConfiguration.Fragment.rules:type_name -> aggregation.KeyerConfiguration.Fragment.Rule
-	3,  // 13: aggregation.KeyerConfiguration.Fragment.Rule.match:type_name -> aggregation.MatchPredicate
-	4,  // 14: aggregation.KeyerConfiguration.Fragment.Rule.result:type_name -> aggregation.ResultPredicate
-	1,  // 15: aggregation.MatchPredicate.RequestNodeMatch.id_match:type_name -> aggregation.StringMatch
-	1,  // 16: aggregation.MatchPredicate.RequestNodeMatch.cluster_match:type_name -> aggregation.StringMatch
-	2,  // 17: aggregation.MatchPredicate.RequestNodeMatch.locality_match:type_name -> aggregation.LocalityMatch
-	3,  // 18: aggregation.MatchPredicate.MatchSet.rules:type_name -> aggregation.MatchPredicate
-	15, // 19: aggregation.ResultPredicate.ResultAction.regex_action:type_name -> aggregation.ResultPredicate.ResultAction.RegexAction
-	10, // 20: aggregation.ResultPredicate.LocalityResultAction.region_action:type_name -> aggregation.ResultPredicate.ResultAction
-	10, // 21: aggregation.ResultPredicate.LocalityResultAction.zone_action:type_name -> aggregation.ResultPredicate.ResultAction
-	10, // 22: aggregation.ResultPredicate.LocalityResultAction.subzone_action:type_name -> aggregation.ResultPredicate.ResultAction
-	4,  // 23: aggregation.ResultPredicate.AndResult.result_predicates:type_name -> aggregation.ResultPredicate
-	10, // 24: aggregation.ResultPredicate.RequestNodeFragment.id_action:type_name -> aggregation.ResultPredicate.ResultAction
-	10, // 25: aggregation.ResultPredicate.RequestNodeFragment.cluster_action:type_name -> aggregation.ResultPredicate.ResultAction
-	11, // 26: aggregation.ResultPredicate.RequestNodeFragment.locality_action:type_name -> aggregation.ResultPredicate.LocalityResultAction
-	10, // 27: aggregation.ResultPredicate.ResourceNamesFragment.action:type_name -> aggregation.ResultPredicate.ResultAction
-	28, // [28:28] is the sub-list for method output_type
-	28, // [28:28] is the sub-list for method input_type
-	28, // [28:28] is the sub-list for extension type_name
-	28, // [28:28] is the sub-list for extension extendee
-	0,  // [0:28] is the sub-list for field type_name
+	1,  // 4: aggregation.StructValueMatch.string_match:type_name -> aggregation.StringMatch
+	2,  // 5: aggregation.StructValueMatch.bool_match:type_name -> aggregation.BoolMatch
+	4,  // 6: aggregation.NodeMetadataMatch.path:type_name -> aggregation.PathSegment
+	5,  // 7: aggregation.NodeMetadataMatch.match:type_name -> aggregation.StructValueMatch
+	13, // 8: aggregation.MatchPredicate.and_match:type_name -> aggregation.MatchPredicate.MatchSet
+	13, // 9: aggregation.MatchPredicate.or_match:type_name -> aggregation.MatchPredicate.MatchSet
+	7,  // 10: aggregation.MatchPredicate.not_match:type_name -> aggregation.MatchPredicate
+	11, // 11: aggregation.MatchPredicate.request_type_match:type_name -> aggregation.MatchPredicate.RequestTypeMatch
+	12, // 12: aggregation.MatchPredicate.request_node_match:type_name -> aggregation.MatchPredicate.RequestNodeMatch
+	17, // 13: aggregation.ResultPredicate.and_result:type_name -> aggregation.ResultPredicate.AndResult
+	18, // 14: aggregation.ResultPredicate.request_node_fragment:type_name -> aggregation.ResultPredicate.RequestNodeFragment
+	19, // 15: aggregation.ResultPredicate.resource_names_fragment:type_name -> aggregation.ResultPredicate.ResourceNamesFragment
+	10, // 16: aggregation.KeyerConfiguration.Fragment.rules:type_name -> aggregation.KeyerConfiguration.Fragment.Rule
+	7,  // 17: aggregation.KeyerConfiguration.Fragment.Rule.match:type_name -> aggregation.MatchPredicate
+	8,  // 18: aggregation.KeyerConfiguration.Fragment.Rule.result:type_name -> aggregation.ResultPredicate
+	1,  // 19: aggregation.MatchPredicate.RequestNodeMatch.id_match:type_name -> aggregation.StringMatch
+	1,  // 20: aggregation.MatchPredicate.RequestNodeMatch.cluster_match:type_name -> aggregation.StringMatch
+	3,  // 21: aggregation.MatchPredicate.RequestNodeMatch.locality_match:type_name -> aggregation.LocalityMatch
+	6,  // 22: aggregation.MatchPredicate.RequestNodeMatch.node_metadata_match:type_name -> aggregation.NodeMetadataMatch
+	7,  // 23: aggregation.MatchPredicate.MatchSet.rules:type_name -> aggregation.MatchPredicate
+	20, // 24: aggregation.ResultPredicate.ResultAction.regex_action:type_name -> aggregation.ResultPredicate.ResultAction.RegexAction
+	14, // 25: aggregation.ResultPredicate.LocalityResultAction.region_action:type_name -> aggregation.ResultPredicate.ResultAction
+	14, // 26: aggregation.ResultPredicate.LocalityResultAction.zone_action:type_name -> aggregation.ResultPredicate.ResultAction
+	14, // 27: aggregation.ResultPredicate.LocalityResultAction.subzone_action:type_name -> aggregation.ResultPredicate.ResultAction
+	4,  // 28: aggregation.ResultPredicate.NodeMetadataAction.path:type_name -> aggregation.PathSegment
+	14, // 29: aggregation.ResultPredicate.NodeMetadataAction.action:type_name -> aggregation.ResultPredicate.ResultAction
+	8,  // 30: aggregation.ResultPredicate.AndResult.result_predicates:type_name -> aggregation.ResultPredicate
+	14, // 31: aggregation.ResultPredicate.RequestNodeFragment.id_action:type_name -> aggregation.ResultPredicate.ResultAction
+	14, // 32: aggregation.ResultPredicate.RequestNodeFragment.cluster_action:type_name -> aggregation.ResultPredicate.ResultAction
+	15, // 33: aggregation.ResultPredicate.RequestNodeFragment.locality_action:type_name -> aggregation.ResultPredicate.LocalityResultAction
+	16, // 34: aggregation.ResultPredicate.RequestNodeFragment.node_metadata_action:type_name -> aggregation.ResultPredicate.NodeMetadataAction
+	14, // 35: aggregation.ResultPredicate.ResourceNamesFragment.action:type_name -> aggregation.ResultPredicate.ResultAction
+	36, // [36:36] is the sub-list for method output_type
+	36, // [36:36] is the sub-list for method input_type
+	36, // [36:36] is the sub-list for extension type_name
+	36, // [36:36] is the sub-list for extension extendee
+	0,  // [0:36] is the sub-list for field type_name
 }
 
 func init() { file_aggregation_v1_aggregation_proto_init() }
@@ -1487,7 +1870,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LocalityMatch); i {
+			switch v := v.(*BoolMatch); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1499,7 +1882,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*MatchPredicate); i {
+			switch v := v.(*LocalityMatch); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1511,7 +1894,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ResultPredicate); i {
+			switch v := v.(*PathSegment); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1523,7 +1906,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KeyerConfiguration_Fragment); i {
+			switch v := v.(*StructValueMatch); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1535,7 +1918,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KeyerConfiguration_Fragment_Rule); i {
+			switch v := v.(*NodeMetadataMatch); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1547,7 +1930,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*MatchPredicate_RequestTypeMatch); i {
+			switch v := v.(*MatchPredicate); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1559,7 +1942,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*MatchPredicate_RequestNodeMatch); i {
+			switch v := v.(*ResultPredicate); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1571,7 +1954,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*MatchPredicate_MatchSet); i {
+			switch v := v.(*KeyerConfiguration_Fragment); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1583,7 +1966,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ResultPredicate_ResultAction); i {
+			switch v := v.(*KeyerConfiguration_Fragment_Rule); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1595,7 +1978,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ResultPredicate_LocalityResultAction); i {
+			switch v := v.(*MatchPredicate_RequestTypeMatch); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1607,7 +1990,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ResultPredicate_AndResult); i {
+			switch v := v.(*MatchPredicate_RequestNodeMatch); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1619,7 +2002,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ResultPredicate_RequestNodeFragment); i {
+			switch v := v.(*MatchPredicate_MatchSet); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1631,7 +2014,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ResultPredicate_ResourceNamesFragment); i {
+			switch v := v.(*ResultPredicate_ResultAction); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1643,6 +2026,66 @@ func file_aggregation_v1_aggregation_proto_init() {
 			}
 		}
 		file_aggregation_v1_aggregation_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ResultPredicate_LocalityResultAction); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_aggregation_v1_aggregation_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ResultPredicate_NodeMetadataAction); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_aggregation_v1_aggregation_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ResultPredicate_AndResult); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_aggregation_v1_aggregation_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ResultPredicate_RequestNodeFragment); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_aggregation_v1_aggregation_proto_msgTypes[19].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ResultPredicate_ResourceNamesFragment); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_aggregation_v1_aggregation_proto_msgTypes[20].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ResultPredicate_ResultAction_RegexAction); i {
 			case 0:
 				return &v.state
@@ -1659,7 +2102,11 @@ func file_aggregation_v1_aggregation_proto_init() {
 		(*StringMatch_ExactMatch)(nil),
 		(*StringMatch_RegexMatch)(nil),
 	}
-	file_aggregation_v1_aggregation_proto_msgTypes[3].OneofWrappers = []interface{}{
+	file_aggregation_v1_aggregation_proto_msgTypes[5].OneofWrappers = []interface{}{
+		(*StructValueMatch_StringMatch)(nil),
+		(*StructValueMatch_BoolMatch)(nil),
+	}
+	file_aggregation_v1_aggregation_proto_msgTypes[7].OneofWrappers = []interface{}{
 		(*MatchPredicate_AndMatch)(nil),
 		(*MatchPredicate_OrMatch)(nil),
 		(*MatchPredicate_NotMatch)(nil),
@@ -1667,25 +2114,27 @@ func file_aggregation_v1_aggregation_proto_init() {
 		(*MatchPredicate_RequestTypeMatch_)(nil),
 		(*MatchPredicate_RequestNodeMatch_)(nil),
 	}
-	file_aggregation_v1_aggregation_proto_msgTypes[4].OneofWrappers = []interface{}{
+	file_aggregation_v1_aggregation_proto_msgTypes[8].OneofWrappers = []interface{}{
 		(*ResultPredicate_AndResult_)(nil),
 		(*ResultPredicate_RequestNodeFragment_)(nil),
 		(*ResultPredicate_ResourceNamesFragment_)(nil),
 		(*ResultPredicate_StringFragment)(nil),
 	}
-	file_aggregation_v1_aggregation_proto_msgTypes[8].OneofWrappers = []interface{}{
+	file_aggregation_v1_aggregation_proto_msgTypes[12].OneofWrappers = []interface{}{
 		(*MatchPredicate_RequestNodeMatch_IdMatch)(nil),
 		(*MatchPredicate_RequestNodeMatch_ClusterMatch)(nil),
 		(*MatchPredicate_RequestNodeMatch_LocalityMatch)(nil),
+		(*MatchPredicate_RequestNodeMatch_NodeMetadataMatch)(nil),
 	}
-	file_aggregation_v1_aggregation_proto_msgTypes[10].OneofWrappers = []interface{}{
+	file_aggregation_v1_aggregation_proto_msgTypes[14].OneofWrappers = []interface{}{
 		(*ResultPredicate_ResultAction_Exact)(nil),
 		(*ResultPredicate_ResultAction_RegexAction_)(nil),
 	}
-	file_aggregation_v1_aggregation_proto_msgTypes[13].OneofWrappers = []interface{}{
+	file_aggregation_v1_aggregation_proto_msgTypes[18].OneofWrappers = []interface{}{
 		(*ResultPredicate_RequestNodeFragment_IdAction)(nil),
 		(*ResultPredicate_RequestNodeFragment_ClusterAction)(nil),
 		(*ResultPredicate_RequestNodeFragment_LocalityAction)(nil),
+		(*ResultPredicate_RequestNodeFragment_NodeMetadataAction)(nil),
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -1693,7 +2142,7 @@ func file_aggregation_v1_aggregation_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_aggregation_v1_aggregation_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   16,
+			NumMessages:   21,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/pkg/api/aggregation/v1/aggregation.pb.validate.go b/pkg/api/aggregation/v1/aggregation.pb.validate.go
index 61538a3c..6e98a6cc 100644
--- a/pkg/api/aggregation/v1/aggregation.pb.validate.go
+++ b/pkg/api/aggregation/v1/aggregation.pb.validate.go
@@ -206,6 +206,72 @@ var _ interface {
 	ErrorName() string
 } = StringMatchValidationError{}
 
+// Validate checks the field values on BoolMatch with the rules defined in the
+// proto definition for this message. If any rules are violated, an error is returned.
+func (m *BoolMatch) Validate() error {
+	if m == nil {
+		return nil
+	}
+
+	// no validation rules for ValueMatch
+
+	return nil
+}
+
+// BoolMatchValidationError is the validation error returned by
+// BoolMatch.Validate if the designated constraints aren't met.
+type BoolMatchValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e BoolMatchValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e BoolMatchValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e BoolMatchValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e BoolMatchValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e BoolMatchValidationError) ErrorName() string { return "BoolMatchValidationError" }
+
+// Error satisfies the builtin error interface
+func (e BoolMatchValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sBoolMatch.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = BoolMatchValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = BoolMatchValidationError{}
+
 // Validate checks the field values on LocalityMatch with the rules defined in
 // the proto definition for this message. If any rules are violated, an error
 // is returned.
@@ -301,6 +367,283 @@ var _ interface {
 	ErrorName() string
 } = LocalityMatchValidationError{}
 
+// Validate checks the field values on PathSegment with the rules defined in
+// the proto definition for this message. If any rules are violated, an error
+// is returned.
+func (m *PathSegment) Validate() error {
+	if m == nil {
+		return nil
+	}
+
+	if utf8.RuneCountInString(m.GetKey()) < 1 {
+		return PathSegmentValidationError{
+			field:  "Key",
+			reason: "value length must be at least 1 runes",
+		}
+	}
+
+	return nil
+}
+
+// PathSegmentValidationError is the validation error returned by
+// PathSegment.Validate if the designated constraints aren't met.
+type PathSegmentValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e PathSegmentValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e PathSegmentValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e PathSegmentValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e PathSegmentValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e PathSegmentValidationError) ErrorName() string { return "PathSegmentValidationError" }
+
+// Error satisfies the builtin error interface
+func (e PathSegmentValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sPathSegment.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = PathSegmentValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = PathSegmentValidationError{}
+
+// Validate checks the field values on StructValueMatch with the rules defined
+// in the proto definition for this message. If any rules are violated, an
+// error is returned.
+func (m *StructValueMatch) Validate() error {
+	if m == nil {
+		return nil
+	}
+
+	switch m.Match.(type) {
+
+	case *StructValueMatch_StringMatch:
+
+		if v, ok := interface{}(m.GetStringMatch()).(interface{ Validate() error }); ok {
+			if err := v.Validate(); err != nil {
+				return StructValueMatchValidationError{
+					field:  "StringMatch",
+					reason: "embedded message failed validation",
+					cause:  err,
+				}
+			}
+		}
+
+	case *StructValueMatch_BoolMatch:
+
+		if v, ok := interface{}(m.GetBoolMatch()).(interface{ Validate() error }); ok {
+			if err := v.Validate(); err != nil {
+				return StructValueMatchValidationError{
+					field:  "BoolMatch",
+					reason: "embedded message failed validation",
+					cause:  err,
+				}
+			}
+		}
+
+	default:
+		return StructValueMatchValidationError{
+			field:  "Match",
+			reason: "value is required",
+		}
+
+	}
+
+	return nil
+}
+
+// StructValueMatchValidationError is the validation error returned by
+// StructValueMatch.Validate if the designated constraints aren't met.
+type StructValueMatchValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e StructValueMatchValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e StructValueMatchValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e StructValueMatchValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e StructValueMatchValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e StructValueMatchValidationError) ErrorName() string { return "StructValueMatchValidationError" }
+
+// Error satisfies the builtin error interface
+func (e StructValueMatchValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sStructValueMatch.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = StructValueMatchValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = StructValueMatchValidationError{}
+
+// Validate checks the field values on NodeMetadataMatch with the rules defined
+// in the proto definition for this message. If any rules are violated, an
+// error is returned.
+func (m *NodeMetadataMatch) Validate() error {
+	if m == nil {
+		return nil
+	}
+
+	if len(m.GetPath()) < 1 {
+		return NodeMetadataMatchValidationError{
+			field:  "Path",
+			reason: "value must contain at least 1 item(s)",
+		}
+	}
+
+	for idx, item := range m.GetPath() {
+		_, _ = idx, item
+
+		if v, ok := interface{}(item).(interface{ Validate() error }); ok {
+			if err := v.Validate(); err != nil {
+				return NodeMetadataMatchValidationError{
+					field:  fmt.Sprintf("Path[%v]", idx),
+					reason: "embedded message failed validation",
+					cause:  err,
+				}
+			}
+		}
+
+	}
+
+	if m.GetMatch() == nil {
+		return NodeMetadataMatchValidationError{
+			field:  "Match",
+			reason: "value is required",
+		}
+	}
+
+	if v, ok := interface{}(m.GetMatch()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return NodeMetadataMatchValidationError{
+				field:  "Match",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
+	return nil
+}
+
+// NodeMetadataMatchValidationError is the validation error returned by
+// NodeMetadataMatch.Validate if the designated constraints aren't met.
+type NodeMetadataMatchValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e NodeMetadataMatchValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e NodeMetadataMatchValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e NodeMetadataMatchValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e NodeMetadataMatchValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e NodeMetadataMatchValidationError) ErrorName() string {
+	return "NodeMetadataMatchValidationError"
+}
+
+// Error satisfies the builtin error interface
+func (e NodeMetadataMatchValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sNodeMetadataMatch.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = NodeMetadataMatchValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = NodeMetadataMatchValidationError{}
+
 // Validate checks the field values on MatchPredicate with the rules defined in
 // the proto definition for this message. If any rules are violated, an error
 // is returned.
@@ -872,6 +1215,18 @@ func (m *MatchPredicate_RequestNodeMatch) Validate() error {
 			}
 		}
 
+	case *MatchPredicate_RequestNodeMatch_NodeMetadataMatch:
+
+		if v, ok := interface{}(m.GetNodeMetadataMatch()).(interface{ Validate() error }); ok {
+			if err := v.Validate(); err != nil {
+				return MatchPredicate_RequestNodeMatchValidationError{
+					field:  "NodeMetadataMatch",
+					reason: "embedded message failed validation",
+					cause:  err,
+				}
+			}
+		}
+
 	default:
 		return MatchPredicate_RequestNodeMatchValidationError{
 			field:  "Type",
@@ -1226,6 +1581,113 @@ var _ interface {
 	ErrorName() string
 } = ResultPredicate_LocalityResultActionValidationError{}
 
+// Validate checks the field values on ResultPredicate_NodeMetadataAction with
+// the rules defined in the proto definition for this message. If any rules
+// are violated, an error is returned.
+func (m *ResultPredicate_NodeMetadataAction) Validate() error {
+	if m == nil {
+		return nil
+	}
+
+	if len(m.GetPath()) < 1 {
+		return ResultPredicate_NodeMetadataActionValidationError{
+			field:  "Path",
+			reason: "value must contain at least 1 item(s)",
+		}
+	}
+
+	for idx, item := range m.GetPath() {
+		_, _ = idx, item
+
+		if v, ok := interface{}(item).(interface{ Validate() error }); ok {
+			if err := v.Validate(); err != nil {
+				return ResultPredicate_NodeMetadataActionValidationError{
+					field:  fmt.Sprintf("Path[%v]", idx),
+					reason: "embedded message failed validation",
+					cause:  err,
+				}
+			}
+		}
+
+	}
+
+	if m.GetAction() == nil {
+		return ResultPredicate_NodeMetadataActionValidationError{
+			field:  "Action",
+			reason: "value is required",
+		}
+	}
+
+	if v, ok := interface{}(m.GetAction()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return ResultPredicate_NodeMetadataActionValidationError{
+				field:  "Action",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
+	return nil
+}
+
+// ResultPredicate_NodeMetadataActionValidationError is the validation error
+// returned by ResultPredicate_NodeMetadataAction.Validate if the designated
+// constraints aren't met.
+type ResultPredicate_NodeMetadataActionValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e ResultPredicate_NodeMetadataActionValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e ResultPredicate_NodeMetadataActionValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e ResultPredicate_NodeMetadataActionValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e ResultPredicate_NodeMetadataActionValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e ResultPredicate_NodeMetadataActionValidationError) ErrorName() string {
+	return "ResultPredicate_NodeMetadataActionValidationError"
+}
+
+// Error satisfies the builtin error interface
+func (e ResultPredicate_NodeMetadataActionValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sResultPredicate_NodeMetadataAction.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = ResultPredicate_NodeMetadataActionValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = ResultPredicate_NodeMetadataActionValidationError{}
+
 // Validate checks the field values on ResultPredicate_AndResult with the rules
 // defined in the proto definition for this message. If any rules are
 // violated, an error is returned.
@@ -1361,6 +1823,18 @@ func (m *ResultPredicate_RequestNodeFragment) Validate() error {
 			}
 		}
 
+	case *ResultPredicate_RequestNodeFragment_NodeMetadataAction:
+
+		if v, ok := interface{}(m.GetNodeMetadataAction()).(interface{ Validate() error }); ok {
+			if err := v.Validate(); err != nil {
+				return ResultPredicate_RequestNodeFragmentValidationError{
+					field:  "NodeMetadataAction",
+					reason: "embedded message failed validation",
+					cause:  err,
+				}
+			}
+		}
+
 	default:
 		return ResultPredicate_RequestNodeFragmentValidationError{
 			field:  "Action",