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-rw-r--r--src/monitor/pkg/controller/resourcebundlestate/controller.go126
1 files changed, 126 insertions, 0 deletions
diff --git a/src/monitor/pkg/controller/resourcebundlestate/controller.go b/src/monitor/pkg/controller/resourcebundlestate/controller.go
new file mode 100644
index 00000000..debd5f65
--- /dev/null
+++ b/src/monitor/pkg/controller/resourcebundlestate/controller.go
@@ -0,0 +1,126 @@
+package resourcebundlestate
+
+import (
+ "context"
+ "log"
+
+ "monitor/pkg/apis/k8splugin/v1alpha1"
+
+ corev1 "k8s.io/api/core/v1"
+ k8serrors "k8s.io/apimachinery/pkg/api/errors"
+ "sigs.k8s.io/controller-runtime/pkg/client"
+ "sigs.k8s.io/controller-runtime/pkg/controller"
+ "sigs.k8s.io/controller-runtime/pkg/manager"
+ "sigs.k8s.io/controller-runtime/pkg/reconcile"
+ "sigs.k8s.io/controller-runtime/pkg/source"
+)
+
+// Add the new controller to the controller manager
+func Add(mgr manager.Manager) error {
+ return add(mgr, newReconciler(mgr))
+}
+
+func add(mgr manager.Manager, r *reconciler) error {
+ // Create a new controller
+ c, err := controller.New("ResourceBundleState-controller", mgr, controller.Options{Reconciler: r})
+ if err != nil {
+ return err
+ }
+
+ // Watch for changes to primary resource ResourceBundleState
+ err = c.Watch(&source.Kind{Type: &v1alpha1.ResourceBundleState{}}, &EventHandler{})
+ if err != nil {
+ return err
+ }
+
+ return nil
+}
+
+func newReconciler(m manager.Manager) *reconciler {
+ return &reconciler{client: m.GetClient()}
+}
+
+type reconciler struct {
+ // Stores an array of all the ResourceBundleState
+ crList []v1alpha1.ResourceBundleState
+ client client.Client
+}
+
+// Reconcile implements the loop that will manage the ResourceBundleState CR
+// We only accept CREATE events here and any subsequent changes are ignored.
+func (r *reconciler) Reconcile(req reconcile.Request) (reconcile.Result, error) {
+ log.Printf("Reconciling ResourceBundleState %+v\n", req)
+
+ rbstate := &v1alpha1.ResourceBundleState{}
+ err := r.client.Get(context.TODO(), req.NamespacedName, rbstate)
+ if err != nil {
+ if k8serrors.IsNotFound(err) {
+ log.Printf("Object not found: %+v. Ignore as it must have been deleted.\n", req.NamespacedName)
+ return reconcile.Result{}, nil
+ }
+ log.Printf("Failed to get object: %+v\n", req.NamespacedName)
+ return reconcile.Result{}, err
+ }
+
+ err = r.updatePods(rbstate, rbstate.Spec.Selector.MatchLabels)
+ if err != nil {
+ log.Printf("Error adding podstatuses: %v\n", err)
+ return reconcile.Result{}, err
+ }
+
+ err = r.updateServices(rbstate, rbstate.Spec.Selector.MatchLabels)
+ if err != nil {
+ log.Printf("Error adding services: %v\n", err)
+ return reconcile.Result{}, err
+ }
+
+ // TODO: Update this based on the statuses of the lower resources
+ rbstate.Status.Ready = false
+ err = r.client.Status().Update(context.TODO(), rbstate)
+ if err != nil {
+ log.Printf("failed to update rbstate: %v\n", err)
+ return reconcile.Result{}, err
+ }
+
+ return reconcile.Result{}, nil
+}
+
+func (r *reconciler) updateServices(rbstate *v1alpha1.ResourceBundleState,
+ selectors map[string]string) error {
+
+ // Update the CR with the Services created as well
+ serviceList := &corev1.ServiceList{}
+ err := listResources(r.client, rbstate.Namespace, selectors, serviceList)
+ if err != nil {
+ log.Printf("Failed to list services: %v", err)
+ return err
+ }
+
+ rbstate.Status.ServiceStatuses = serviceList.Items
+ return nil
+}
+
+func (r *reconciler) updatePods(rbstate *v1alpha1.ResourceBundleState,
+ selectors map[string]string) error {
+
+ // Update the CR with the pods tracked
+ podList := &corev1.PodList{}
+ err := listResources(r.client, rbstate.Namespace, selectors, podList)
+ if err != nil {
+ log.Printf("Failed to list pods: %v", err)
+ return err
+ }
+
+ rbstate.Status.PodStatuses = []v1alpha1.PodStatus{}
+
+ for _, pod := range podList.Items {
+ resStatus := v1alpha1.PodStatus{
+ ObjectMeta: pod.ObjectMeta,
+ Ready: false,
+ Status: pod.Status,
+ }
+ rbstate.Status.PodStatuses = append(rbstate.Status.PodStatuses, resStatus)
+ }
+
+ return nil
+}