Add adopted cluster template to adopt existing k8s clusters

config/dev/adopted-clusterdeployment.yaml

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+apiVersion: hmc.mirantis.com/v1alpha1
+kind: ClusterDeployment
+metadata:
+  name: aws-dev
+  namespace: ${NAMESPACE}
+spec:
+  template: adopted-cluster-0-0-4
+  credential: adopted-cluster-cred
+  config: {}
+  services:
+    - template: kyverno-3-2-6
+      name: kyverno
+      namespace: kyverno
+    - template: ingress-nginx-4-11-0
+      name: ingress-nginx
+      namespace: ingress-nginx

config/dev/adopted-credentials.yaml

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+apiVersion: v1
+data:
+  value: ${KUBECONFIG_DATA}
+kind: Secret
+metadata:
+  name: adopted-cluster-kubeconf
+  namespace: ${NAMESPACE}
+type: Opaque
+---
+apiVersion: hmc.mirantis.com/v1alpha1
+kind: Credential
+metadata:
+  name: adopted-cluster-cred
+  namespace: ${NAMESPACE}
+spec:
+  description: Adopted Credentials
+  identityRef:
+    apiVersion: v1
+    kind: Secret
+    name: adopted-cluster-kubeconf
+    namespace: ${NAMESPACE}

templates/cluster/adopted-cluster/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

templates/cluster/adopted-cluster/Chart.yaml

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+apiVersion: v2
+name: adopted-cluster
+description: |
+  An HMC template to adopt an already existing kubernetes cluster
+type: application
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.0.4
+annotations:
+  cluster.x-k8s.io/provider: infrastructure-internal

templates/cluster/adopted-cluster/templates/_helpers.tpl

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+{{- define "cluster.name" -}}
+    {{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+

templates/cluster/adopted-cluster/templates/sveltoscluster.yaml

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+apiVersion: lib.projectsveltos.io/v1beta1
+kind: SveltosCluster
+metadata:
+  labels:
+    projectsveltos.io/k8s-version: v1.31.1
+  name: {{ include "cluster.name" . }}
+  namespace: {{ .Release.Namespace }}
+spec:
+  consecutiveFailureThreshold: {{ .Values.consecutiveFailureThreshold }}
+  kubeconfigName: {{ .Values.clusterIdentity.name }}

templates/cluster/adopted-cluster/values.schema.json

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+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "description": "An HMC template to adopt an existing k8s cluster.",
+  "type": "object",
+  "required": [
+    "clusterIdentity"
+  ],
+  "properties": {
+    "consecutiveFailureThreshold": {
+      "description": "The number of the failures prior to setting the status condition",
+      "type": "integer",
+      "minimum": 1
+    },
+    "clusterIdentity": {
+      "type": "object",
+      "description": "Adopted Cluster Identity object reference",
+      "required": [
+        "name",
+        "kind"
+      ],
+      "properties": {
+        "name": {
+          "description": "Adopted ClusterIdentity object name",
+          "type": "string"
+        },
+        "kind": {
+          "description": "Adopted ClusterIdentity object kind",
+          "type": "string"
+        }
+      }
+    }
+  }
+}

templates/cluster/adopted-cluster/values.yaml

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+# Cluster parameters
+
+clusterIdentity:
+  name: "adopted-cluster-identity"
+  kind: "Secret"
+
+consecutiveFailureThreshold: 3

templates/provider/hmc-templates/files/templates/adopted-cluster-0-0-4.yaml

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+apiVersion: hmc.mirantis.com/v1alpha1
+kind: ClusterTemplate
+metadata:
+  name: adopted-cluster-0-0-4
+  annotations:
+    helm.sh/resource-policy: keep
+spec:
+  helm:
+    chartSpec:
+      chart: adopted-cluster
+      version: 0.0.4
+      interval: 10m0s
+      sourceRef:
+        kind: HelmRepository
+        name: hmc-templates