Add DNSSettings for Tracer Configuration (API part)

mesh/v1alpha1/proxy.proto

@@ -192,6 +192,17 @@ message Tracing {
     string default_value = 2;
   }
 
+  // Configures DNS settings for the tracing service.
+  message DNSSettings {
+    // The DNS refresh rate to fetch DNS records for the tracing service.
+    // Default is 30 seconds.
+    google.protobuf.Duration refresh_rate = 1;
+
+    // Whether to respect DNS TTL values for the tracing service.
+    // Default is true.
+    bool respect_ttl = 2;
+  }
+
   // Configures the custom tags to be added to active span by all proxies (i.e. sidecars
   // and gateways).
   // The key represents the name of the tag.
@@ -221,9 +232,17 @@ message Tracing {
   // mode as `ISTIO_MUTUAL`.
   istio.networking.v1alpha3.ClientTLSSettings tls_settings = 8;
 
-  // $hide_from_docs
-  // Next available field number: 10
+  // Configures DNS settings for the tracing service.
+  // Ex:
+  // ```yaml
+  // dns_settings:
+  //   refresh_rate: 30s
+  //   respect_ttl: true
+  // ```
+  DNSSettings dns_settings = 10;
 
+  // $hide_from_docs
+  // Next available field number: 11
 }
 
 // SDS defines secret discovery service(SDS) configuration to be used by the proxy.

proto.lock

@@ -38579,6 +38579,11 @@
                 "id": 8,
                 "name": "tls_settings",
                 "type": "istio.networking.v1alpha3.ClientTLSSettings"
+              },
+              {
+                "id": 10,
+                "name": "dns_settings",
+                "type": "DNSSettings"
               }
             ],
             "maps": [
@@ -38727,6 +38732,21 @@
                     "type": "string"
                   }
                 ]
+              },
+              {
+                "name": "DNSSettings",
+                "fields": [
+                  {
+                    "id": 1,
+                    "name": "refresh_rate",
+                    "type": "google.protobuf.Duration"
+                  },
+                  {
+                    "id": 2,
+                    "name": "respect_ttl",
+                    "type": "bool"
+                  }
+                ]
               }
             ]
           },