feat: Configure namespace sync in helm chart

- Adds configuration fields and passes them to manager as flags.
- Documents configuration fields and their default values.

Author: dlipovetsky

charts/cluster-api-runtime-extensions-nutanix/README.md

@@ -70,6 +70,8 @@ A Helm chart for cluster-api-runtime-extensions-nutanix
 | image.repository | string | `"ghcr.io/nutanix-cloud-native/cluster-api-runtime-extensions-nutanix"` |  |
 | image.tag | string | `""` |  |
 | imagePullSecrets | list | `[]` | Optional secrets used for pulling the container image |
+| namespaceSync.sourceNamespace | string | `"default"` |  |
+| namespaceSync.targetNamespaceLabelKey | string | `"caren.nutanix.com/namespace-sync"` |  |
 | nodeSelector | object | `{}` |  |
 | priorityClassName | string | `"system-cluster-critical"` | Priority class to be used for the pod. |
 | resources.limits.cpu | string | `"100m"` |  |

charts/cluster-api-runtime-extensions-nutanix/templates/deployment.yaml

@@ -30,6 +30,8 @@ spec:
         args:
         - --webhook-cert-dir=/runtimehooks-certs/
         - --defaults-namespace=$(POD_NAMESPACE)
+        - --namespacesync-source-namespace={{ .Values.namespaceSync.sourceNamespace }}
+        - --namespacesync-target-namespace-label-key={{ .Values.namespaceSync.targetNamespaceLabelKey }}
         - --helm-addons-configmap={{ .Values.helmAddonsConfigMap }}
         - --cni.cilium.helm-addon.default-values-template-configmap-name={{ .Values.hooks.cni.cilium.helmAddonStrategy.defaultValueTemplateConfigMap.name }}
         - --nfd.helm-addon.default-values-template-configmap-name={{ .Values.hooks.nfd.helmAddonStrategy.defaultValueTemplateConfigMap.name }}

charts/cluster-api-runtime-extensions-nutanix/values.yaml

@@ -86,6 +86,14 @@ helmAddonsConfigMap: default-helm-addons-config
 
 deployDefaultClusterClasses: true
 
+# The ClusterClass and the Templates it references must be in the same namespace
+# as the Cluster. To enable cluster creation in user-defined namespaces, CAREN
+# will copy all ClusterClasses and Templates from the source namespace to every
+# target namespace, i.e., every namespace that has a label with a matching key.
+namespaceSync:
+  sourceNamespace: default
+  targetNamespaceLabelKey: caren.nutanix.com/namespace-sync
+
 deployment:
   replicas: 1