fix: align kubernetes cluster name validation with EKS

bottlerocket-settings-models/modeled-types/src/kubernetes.rs

@@ -311,14 +311,20 @@ mod test_kubernetes_taint_value {
 
 /// KubernetesClusterName represents a string that contains a valid Kubernetes cluster name.  It
 /// stores the original string and makes it accessible through standard traits.
-// Note: I was unable to find the rules for cluster naming.  We know they have to fit into label
-// values, because of the common cluster-name label, but they also can't be empty.  This combines
-// those two characteristics into a new type, until we find an explicit syntax.
+// Note: this uses the EKS rules for cluster naming.
 #[derive(Debug, Clone, Eq, PartialEq, Hash)]
 pub struct KubernetesClusterName {
     inner: String,
 }
 
+lazy_static! {
+    pub(crate) static ref KUBERNETES_CLUSTER_NAME: Regex = Regex::new(
+        // follow EKS cluster name requirements: https://docs.aws.amazon.com/eks/latest/APIReference/API_CreateCluster.html#API_CreateCluster_RequestSyntax
+        r"^[0-9A-Za-z][A-Za-z0-9\-_]{0,99}$"
+    )
+    .unwrap();
+}
+
 impl TryFrom<&str> for KubernetesClusterName {
     type Error = error::Error;
 
@@ -331,13 +337,12 @@ impl TryFrom<&str> for KubernetesClusterName {
             }
         );
         ensure!(
-            KubernetesLabelValue::try_from(input).is_ok(),
-            error::InvalidClusterNameSnafu {
-                name: input,
-                msg: "cluster names must be valid Kubernetes label values"
+            KUBERNETES_CLUSTER_NAME.is_match(input),
+            error::BigPatternSnafu {
+                thing: "Kubernetes cluster name",
+                input
             }
         );
-
         Ok(KubernetesClusterName {
             inner: input.to_string(),
         })
@@ -353,14 +358,14 @@ mod test_kubernetes_cluster_name {
 
     #[test]
     fn good_cluster_names() {
-        for ok in &["more-chars_here.now", &"a".repeat(63)] {
+        for ok in &["more-chars_here-123", &"a".repeat(100)] {
             KubernetesClusterName::try_from(*ok).unwrap();
         }
     }
 
     #[test]
     fn bad_values() {
-        for err in &["", ".bad", "bad.", &"a".repeat(64)] {
+        for err in &["", "bad.", "-bad", "_bad", "very bad", &"a".repeat(101)] {
             KubernetesClusterName::try_from(*err).unwrap_err();
         }
     }

deny.toml

@@ -21,6 +21,25 @@ allow = [
 exceptions = [
     { name = "generational-arena", allow = ["MPL-2.0"] },
     { name = "unicode-ident", allow = ["MIT", "Apache-2.0", "Unicode-DFS-2016"] },
+    { name = "icu_collections", allow = ["Unicode-3.0"] },
+    { name = "icu_locid", allow = ["Unicode-3.0"] },
+    { name = "icu_locid_transform", allow = ["Unicode-3.0"] },
+    { name = "icu_locid_transform_data", allow = ["Unicode-3.0"] },
+    { name = "icu_normalizer", allow = ["Unicode-3.0"] },
+    { name = "icu_normalizer_data", allow = ["Unicode-3.0"] },
+    { name = "icu_properties", allow = ["Unicode-3.0"] },
+    { name = "icu_properties_data", allow = ["Unicode-3.0"] },
+    { name = "icu_provider", allow = ["Unicode-3.0"] },
+    { name = "icu_provider_macros", allow = ["Unicode-3.0"] },
+    { name = "litemap", allow = ["Unicode-3.0"] },
+    { name = "tinystr", allow = ["Unicode-3.0"] },
+    { name = "writeable", allow = ["Unicode-3.0"] },
+    { name = "yoke", allow = ["Unicode-3.0"] },
+    { name = "yoke-derive", allow = ["Unicode-3.0"] },
+    { name = "zerofrom", allow = ["Unicode-3.0"] },
+    { name = "zerofrom-derive", allow = ["Unicode-3.0"] },
+    { name = "zerovec", allow = ["Unicode-3.0"] },
+    { name = "zerovec-derive", allow = ["Unicode-3.0"] },
 ]
 
 [bans]