feat: add kubernetes version to status column

Author: Jeff Rose

api/v1alpha1/vcluster_types.go

@@ -72,6 +72,10 @@ type VClusterStatus struct {
 	// ObservedGeneration is the latest generation observed by the controller.
 	// +optional
 	ObservedGeneration int64 `json:"observedGeneration,omitempty"`
+
+	// KubernetesVersion is the version of Kubernetes running in the virtual cluster
+	// +optional
+	KubernetesVersion string `json:"kubernetesVersion,omitempty"`
 }
 
 // GetConditions returns the set of conditions for this object.

controllers/vcluster_controller.go

@@ -471,6 +471,20 @@ func (r *VClusterReconciler) checkReadyz(vCluster *v1alpha1.VCluster, restConfig
 		return false, nil
 	}
 
+	// If readiness check passed, get the version info
+	kubeClient, err := r.ClientConfigGetter.NewForConfig(restConfig)
+	if err != nil {
+		return true, fmt.Errorf("failed to create kubernetes client: %w", err)
+	}
+
+	version, err := kubeClient.Discovery().ServerVersion()
+	if err != nil {
+		return true, fmt.Errorf("failed to get kubernetes version: %w", err)
+	}
+
+	// Update the status with version information
+	vCluster.Status.KubernetesVersion = version.GitVersion
+
 	return true, nil
 }