refactor bluegreen example to work using Metac (#26)

Signed-off-by: AmitKumarDas <[email protected]>

examples/bluegreen/README.md

@@ -1,22 +1,34 @@
 ## BlueGreenDeployment
 
-This is an example CompositeController that implements a custom rollout strategy
-based on a technique called Blue-Green Deployment.
+This is an example CompositeController that implements a custom rollout strategy based on a technique called Blue-Green Deployment.
 
-The controller ramps up a completely separate ReplicaSet in the background for any change to the
-Pod template. It then waits for the new ReplicaSet to be fully Ready and Available
-(all Pods satisfy minReadySeconds), and then switches a Service to point to the new ReplicaSet.
-Finally, it scales down the old ReplicaSet.
+The controller ramps up a completely separate ReplicaSet in the background for any change to the Pod template. It then waits for the new ReplicaSet to be fully Ready and Available (all Pods satisfy minReadySeconds), and then switches a Service to point to the new ReplicaSet. Finally, it scales down the old ReplicaSet.
 
 ### Prerequisites
 
-* Install [Metacontroller](https://github.com/GoogleCloudPlatform/metacontroller)
+* Install Metac from the manifests folder
 
-### Deploy the controller
+```sh
+# verify presence of metac CRDs
+kubectl get crd
+
+# verify presence of metac controller
+kubectl get sts -n metac
+```
+
+### Deploy the BlueGreen controller
 
 ```sh
-kubectl create configmap bluegreen-controller -n metacontroller --from-file=sync.js
-kubectl apply -f bluegreen-controller.yaml
+kubectl create configmap bluegreen-controller -n metac --from-file=sync.js
+
+kubectl apply -f operator.yaml
+
+# verify presence of BlueGreen CRD
+kubectl get crd
+
+# verify presence of BlueGreen controller deployment & service
+kubectl get deploy -n metac
+kubectl get svc -n metac
 ```
 
 ### Create a BlueGreenDeployment

examples/bluegreen/bluegreen-controller.yaml → examples/bluegreen/operator.yaml

@@ -15,7 +15,7 @@ spec:
   subresources:
     status: {}
 ---
-apiVersion: metacontroller.k8s.io/v1alpha1
+apiVersion: metac.openebs.io/v1alpha1
 kind: CompositeController
 metadata:
   name: bluegreen-controller
@@ -35,13 +35,13 @@ spec:
   hooks:
     sync:
       webhook:
-        url: http://bluegreen-controller.metacontroller/sync
+        url: http://bluegreen-controller.metac/sync
 ---
-apiVersion: apps/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: bluegreen-controller
-  namespace: metacontroller
+  namespace: metac
 spec:
   replicas: 1
   selector:
@@ -68,7 +68,7 @@ apiVersion: v1
 kind: Service
 metadata:
   name: bluegreen-controller
-  namespace: metacontroller
+  namespace: metac
 spec:
   selector:
     app: bluegreen-controller

examples/bluegreen/test.sh

@@ -2,52 +2,65 @@
 
 cleanup() {
   set +e
-  echo "Clean up..."
+  echo ""
+
+  echo "--------------------------"
+  echo "++ Clean up started"
+  echo "--------------------------"
+
   kubectl delete -f my-bluegreen.yaml
   kubectl delete rs,svc -l app=nginx,component=frontend
-  kubectl delete -f bluegreen-controller.yaml
-  kubectl delete configmap bluegreen-controller -n metacontroller
+  kubectl delete -f operator.yaml
+  kubectl delete configmap bluegreen-controller -n metac
+
+  echo "--------------------------"
+  echo "++ Clean up completed"
+  echo "--------------------------"
 }
+
+# Comment below if you want to check manually
+# the state of the cluster and intended resources
 trap cleanup EXIT
 
-set -ex
+# Uncomment below if debug / verbose execution is needed
+#set -ex
 
-bgd="bluegreendeployments"
+bgd="bluegreendeployments.ctl.enisoc.com"
 
-echo "Install controller..."
-kubectl create configmap bluegreen-controller -n metacontroller --from-file=sync.js
-kubectl apply -f bluegreen-controller.yaml
+echo -e "\n Install BlueGreen controller..."
+kubectl create configmap bluegreen-controller -n metac --from-file=sync.js
+kubectl apply -f operator.yaml
 
-echo "Wait until CRD is available..."
+echo -e "\n Wait until BlueGreen CRD is available..."
 until kubectl get $bgd; do sleep 1; done
 
-echo "Create an object..."
+echo -e "\n Create a BlueGreen object..."
 kubectl apply -f my-bluegreen.yaml
 
 # TODO(juntee): change observedGeneration steps to compare against generation number when k8s 1.10 and earlier retire.
 
-echo "Wait for nginx-blue RS to be active..."
+echo -e "\n Wait for nginx-blue RS to be active..."
 until [[ "$(kubectl get rs nginx-blue -o 'jsonpath={.status.readyReplicas}')" -eq 3 ]]; do sleep 1; done
 until [[ "$(kubectl get rs nginx-green -o 'jsonpath={.status.replicas}')" -eq 0 ]]; do sleep 1; done
 until [[ "$(kubectl get $bgd nginx -o 'jsonpath={.status.activeColor}')" -eq "blue" ]]; do sleep 1; done
 until [[ "$(kubectl get $bgd nginx -o 'jsonpath={.status.active.availableReplicas}')" -eq 3 ]]; do sleep 1; done
 until [[ "$(kubectl get $bgd nginx -o 'jsonpath={.status.observedGeneration}')" -eq "$(kubectl get $bgd nginx -o 'jsonpath={.metadata.generation}')" ]]; do sleep 1; done
 
 
-echo "Trigger a rollout..."
+echo -e "\n Trigger a rollout..."
 kubectl patch $bgd nginx --type=merge -p '{"spec":{"template":{"metadata":{"labels":{"new":"label"}}}}}'
 
-echo "Wait for nginx-green RS to be active..."
+echo -e "\n Wait for nginx-green RS to be active..."
 until [[ "$(kubectl get rs nginx-green -o 'jsonpath={.status.readyReplicas}')" -eq 3 ]]; do sleep 1; done
 until [[ "$(kubectl get rs nginx-blue -o 'jsonpath={.status.replicas}')" -eq 0 ]]; do sleep 1; done
 until [[ "$(kubectl get $bgd nginx -o 'jsonpath={.status.activeColor}')" -eq "green" ]]; do sleep 1; done
 until [[ "$(kubectl get $bgd nginx -o 'jsonpath={.status.active.availableReplicas}')" -eq 3 ]]; do sleep 1; done
 until [[ "$(kubectl get $bgd nginx -o 'jsonpath={.status.observedGeneration}')" -eq "$(kubectl get $bgd nginx -o 'jsonpath={.metadata.generation}')" ]]; do sleep 1; done
 
-echo "Trigger another rollout..."
+echo -e "\n Trigger another rollout..."
 kubectl patch $bgd nginx --type=merge -p '{"spec":{"template":{"metadata":{"labels":{"new2":"label2"}}}}}'
 
-echo "Wait for nginx-blue RS to be active..."
+echo -e "\n Wait for nginx-blue RS to be active..."
 until [[ "$(kubectl get rs nginx-blue -o 'jsonpath={.status.readyReplicas}')" -eq 3 ]]; do sleep 1; done
 until [[ "$(kubectl get rs nginx-green -o 'jsonpath={.status.replicas}')" -eq 0 ]]; do sleep 1; done
 until [[ "$(kubectl get $bgd nginx -o 'jsonpath={.status.activeColor}')" -eq "blue" ]]; do sleep 1; done

examples/status/test.sh

@@ -2,7 +2,7 @@
 
 cleanup() {
   set +e
-    echo ""
+  echo ""
 
   echo "--------------------------"
   echo "++ Clean up started"