[Feature] Add Plan Changed Events (#585)

Author: ajanikow

CHANGELOG.md

@@ -6,6 +6,7 @@
 - Add runtime TLS rotation for ArangoDB EE 3.7+
 - Add Kustomize support
 - Improve Helm 3 support
+- Allow to customize ID Pod selectors
 
 ## [1.0.3](https://github.com/arangodb/kube-arangodb/tree/1.0.3) (2020-05-25)
 - Prevent deletion of not known PVC's

pkg/deployment/reconcile/plan_builder.go

@@ -73,7 +73,15 @@ func (d *Reconciler) CreatePlan(ctx context.Context, cachedStatus inspector.Insp
 		// Nothing to do
 		return nil, false
 	}
+
+	// Send events
+	for id := len(status.Plan); id < len(newPlan); id++ {
+		action := newPlan[id]
+		d.context.CreateEvent(k8sutil.NewPlanAppendEvent(apiObject, action.Type.String(), action.Group.AsRole(), action.MemberID, action.Reason))
+	}
+
 	status.Plan = newPlan
+
 	if err := d.context.UpdateStatus(status, lastVersion); err != nil {
 		return maskAny(err), false
 	}

pkg/util/k8sutil/events.go

@@ -153,6 +153,23 @@ func NewAccessPackageDeletedEvent(apiObject APIObject, apSecretName string) *Eve
 	return event
 }
 
+// NewPlanTimeoutEvent creates an event indicating that an item on a reconciliation plan has been added
+func NewPlanAppendEvent(apiObject APIObject, itemType, memberID, role, reason string) *Event {
+	event := newDeploymentEvent(apiObject)
+	event.Type = v1.EventTypeNormal
+	event.Reason = "Plan Action added"
+	msg := fmt.Sprintf("An plan item of type %s", itemType)
+	if role != "" {
+		msg = fmt.Sprintf("%s for member %s with role %s", msg, memberID, role)
+	}
+	msg = fmt.Sprintf("%s has beed added", msg)
+	if reason != "" {
+		msg = fmt.Sprintf("%s with reason: %s", msg, reason)
+	}
+	event.Message = msg
+	return event
+}
+
 // NewPlanTimeoutEvent creates an event indicating that an item on a reconciliation plan did not
 // finish before its deadline.
 func NewPlanTimeoutEvent(apiObject APIObject, itemType, memberID, role string) *Event {