Allow rate-limit of changes on cluster (#147)

* Add initial draft to allow limit number of changes on cluster

* Update lint

* Simplify way to measure progress of system rollouts by emiting k8s events

* Applying @crgisch suggestions, thanks

.github/workflows/ci.yaml

@@ -12,7 +12,7 @@ jobs:
         go-version: "1.21"
     - uses: golangci/golangci-lint-action@v3
       with:
-        version: v1.55
+        version: v1.56
     - run: make test
 
   integration:

api/v1alpha1/rpaasinstance_types.go

@@ -340,7 +340,10 @@ type TLSSessionTicket struct {
 
 // RpaasInstanceStatus defines the observed state of RpaasInstance
 type RpaasInstanceStatus struct {
-	// Revision hash calculated for the current spec.
+	//Revision hash calculated for the current spec of rpaasinstance
+	RevisionHash string `json:"revisionHash,omitempty"`
+
+	// Revision hash calculated for the current spec of nginx.
 	WantedNginxRevisionHash string `json:"wantedNginxRevisionHash,omitempty"`
 
 	// The revision hash observed by the controller in the nginx object.

config/crd/bases/extensions.tsuru.io_rpaasinstances.yaml

@@ -6476,8 +6476,11 @@ spec:
               podSelector:
                 description: PodSelector is the NGINX's pod label selector.
                 type: string
+              revisionHash:
+                description: Revision hash calculated for the current spec of rpaasinstance
+                type: string
               wantedNginxRevisionHash:
-                description: Revision hash calculated for the current spec.
+                description: Revision hash calculated for the current spec of nginx.
                 type: string
             required:
             - nginxUpdated