feat(operator): add fallback behavior when no keptn annotations are s…

…et (#171)

README.md

@@ -51,14 +51,25 @@ For this reason, the Keptn Lifecycle Controller is agnostic to deployment tools
 
 ## How to use
 
-The Keptn Lifecycle Controller monitors manifests that have been applied against the Kubernetes API and reacts if it finds a workload with special annotations.
+The Keptn Lifecycle Controller monitors manifests that have been applied against the Kubernetes API and reacts if it finds a workload with special annotations/labels.
 For this, you should annotate your [Workload](https://kubernetes.io/docs/concepts/workloads/) with (at least) the following two annotations:
 
 ```yaml
 keptn.sh/app: myAwesomeAppName
 keptn.sh/workload: myAwesomeWorkload
+keptn.sh/version: myAwesomeWorkloadVersion
 ```
 
+Alternatively, you can use Kubernetes [Recommended Labels](https://kubernetes.io/docs/concepts/overview/working-with-objects/common-labels/) to annotate your workload:
+
+```yaml
+app.kubernetes.io/part-of: myAwesomeAppName
+app.kubernetes.io/name: myAwesomeWorkload
+app.kubernetes.io/version: myAwesomeWorkloadVersion
+```
+
+In general, the Keptn Annotations/Labels take precedence over the Kubernetes recommended labels. If there is no version annotation/label and there is only one container in the pod, the Lifecycle Controller will take the image tag as version (if it is not "latest").
+
 In case you want to run pre- and post-deployment checks, further annotations are necessary:
 
 ```yaml

examples/podtatohead-deployment-k8s-labels/.gitignore

@@ -0,0 +1 @@
+/slack-secret.yaml

examples/podtatohead-deployment-k8s-labels/README.md

@@ -0,0 +1,5 @@
+### Create Secret for Slack here
+
+```
+kubectl create secret generic slack-notification --from-literal=SECURE_DATA='{"slack_hook":"<WebHook>","text":"Deployed PodTatoHead Application"}' -n podtato-kubectl -oyaml --dry-run > slack-secret.yaml
+```

examples/podtatohead-deployment-k8s-labels/app.yaml

@@ -0,0 +1,22 @@
+apiVersion: lifecycle.keptn.sh/v1alpha1
+kind: KeptnApp
+metadata:
+  name: podtato-head
+  namespace: podtato-kubectl
+spec:
+  version: "1.3"
+  workloads:
+    - name: podtato-head-left-arm
+      version: 0.2.7
+    - name: podtato-head-left-leg
+      version: 0.2.7
+    - name: podtato-head-entry
+      version: 0.2.7 
+    - name: podtato-head-right-arm
+      version: 0.1.0
+    - name: podtato-head-left-arm
+      version: 0.2.7
+    - name: podtato-head-hat
+      version: 0.1.0 
+  postDeploymentTasks:
+    - post-deployment-hello 

examples/podtatohead-deployment-k8s-labels/check_entry.yaml

@@ -0,0 +1,12 @@
+apiVersion: lifecycle.keptn.sh/v1alpha1
+kind: KeptnTaskDefinition
+metadata:
+  name: check-entry-service
+  namespace: podtato-kubectl
+spec:
+  function:
+    httpRef:
+      url: https://raw.githubusercontent.com/keptn-sandbox/lifecycle-controller/main/functions-runtime/samples/ts/http.ts
+    parameters:
+      map:
+        url: http://podtato-head-entry.podtato-kubectl.svc.cluster.local:9000

examples/podtatohead-deployment-k8s-labels/manifest.yaml

@@ -0,0 +1,299 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: podtato-kubectl
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-entry
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    matchLabels:
+      component: podtato-head-entry
+  template:
+    metadata:
+      labels:
+        component: podtato-head-entry
+        keptn.sh/app: podtato-head
+        keptn.sh/workload: podtato-head-entry
+    spec:
+      terminationGracePeriodSeconds: 5
+      initContainers:
+      - name: init-myservice
+        image: busybox:1.28
+        command: ['sh', '-c', 'sleep 30']
+      containers:
+      - name: server
+        image: ghcr.io/podtato-head/entry:0.2.7
+        imagePullPolicy: Always
+        ports:
+        - containerPort: 9000
+        env:
+        - name: PODTATO_PORT
+          value: "9000"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: podtato-head-entry
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    component: podtato-head-entry
+  ports:
+  - name: http
+    port: 9000
+    protocol: TCP
+    targetPort: 9000
+  type: LoadBalancer
+  # change to NodePort if no LoadBalancer controller is available
+  # type: NodePort
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-hat
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    matchLabels:
+      component: podtato-head-hat
+  template:
+    metadata:
+      labels:
+        component: podtato-head-hat
+        app.kubernetes.io/version: 0.1.0
+      annotations:
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/name: podtato-head-hat
+        keptn.sh/pre-deployment-tasks: check-entry-service
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+        - name: server
+          image:  ghcr.io/podtato-head/hat:0.2.7
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 9000
+          env:
+            - name: PODTATO_PORT
+              value: "9000"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: podtato-head-hat
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    component: podtato-head-hat
+  ports:
+    - name: http
+      port: 9001
+      protocol: TCP
+      targetPort: 9000
+  type: ClusterIP
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-left-leg
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    matchLabels:
+      component: podtato-head-left-leg
+  template:
+    metadata:
+      labels:
+        component: podtato-head-left-leg
+      annotations:
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/name: podtato-head-left-leg
+        keptn.sh/pre-deployment-tasks: check-entry-service
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+        - name: server
+          image:  ghcr.io/podtato-head/left-leg:0.2.7
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 9000
+          env:
+            - name: PODTATO_PORT
+              value: "9000"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: podtato-head-left-leg
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    component: podtato-head-left-leg
+  ports:
+    - name: http
+      port: 9002
+      protocol: TCP
+      targetPort: 9000
+  type: ClusterIP
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-left-arm
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    matchLabels:
+      component: podtato-head-left-arm
+  template:
+    metadata:
+      labels:
+        component: podtato-head-left-arm
+        app.kubernetes.io/part-of: podtato-head
+      annotations:
+        app.kubernetes.io/name: podtato-head-left-arm
+        keptn.sh/pre-deployment-tasks: check-entry-service
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+        - name: server
+          image:  ghcr.io/podtato-head/left-arm:0.2.7
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 9000
+          env:
+            - name: PODTATO_PORT
+              value: "9000"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: podtato-head-left-arm
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    component: podtato-head-left-arm
+  ports:
+    - name: http
+      port: 9003
+      protocol: TCP
+      targetPort: 9000
+  type: ClusterIP
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-right-leg
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    matchLabels:
+      component: podtato-head-right-leg
+  template:
+    metadata:
+      labels:
+        component: podtato-head-right-leg
+      annotations:
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/name: podtato-head-right-leg
+        keptn.sh/pre-deployment-tasks: check-entry-service
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+        - name: server
+          image:  ghcr.io/podtato-head/right-leg:0.2.7
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 9000
+          env:
+            - name: PODTATO_PORT
+              value: "9000"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: podtato-head-right-leg
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    component: podtato-head-right-leg
+  ports:
+    - name: http
+      port: 9004
+      protocol: TCP
+      targetPort: 9000
+  type: ClusterIP
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-right-arm
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    matchLabels:
+      component: podtato-head-right-arm
+  template:
+    metadata:
+      labels:
+        component: podtato-head-right-arm
+      annotations:
+        app.kubernetes.io/part-of: podtato-head
+        keptn.sh/workload: podtato-head-right-arm
+        keptn.sh/version: 0.1.0
+        keptn.sh/pre-deployment-tasks: check-entry-service
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+        - name: server
+          image:  ghcr.io/podtato-head/right-arm:0.2.7
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 9000
+          env:
+            - name: PODTATO_PORT
+              value: "9000"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: podtato-head-right-arm
+  namespace: podtato-kubectl
+  labels:
+    app: podtato-head
+spec:
+  selector:
+    component: podtato-head-right-arm
+  ports:
+    - name: http
+      port: 9005
+      protocol: TCP
+      targetPort: 9000
+  type: ClusterIP

examples/podtatohead-deployment-k8s-labels/post-deployment-tasks.yaml

@@ -0,0 +1,25 @@
+apiVersion: lifecycle.keptn.sh/v1alpha1
+kind: KeptnTaskDefinition
+metadata:
+  name: post-deployment-hello
+  namespace: podtato-kubectl
+spec:
+  function:
+    inline:
+      code: |
+        let text = Deno.env.get("SECURE_DATA");
+        let data;
+        if (text != undefined) {
+          data = JSON.parse(text);
+        }
+      
+        const body = `{"text": "${data.text}"}`;
+        console.log(body)
+        let resp = await fetch("https://hooks.slack.com/services/" + data.slack_hook, {
+          method: "POST",
+          body,
+        });
+  
+        console.log(resp)
+    secureParameters:
+      secret: slack-notification