Merge "Adding monitor operator to monitor edge resources"

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
+}