bluegreen deployment added

02-deployments/bluegreen/ReadMe

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+ kubectl create ns bluegreen
+ kubectl apply -f app-v1.yaml
+ kubectl run --restart=Never --image=raesene/alpine-nettools nettools
+ kubectl exec -it nettools -- /bin/sh
+ while true; do curl http://my-app.bluegreen; done
+
+ kubectl apply -f app-v2.yaml
+ kubectl get pods -n bluegreen
+ kubectl patch service my-app -n bluegreen -p '{"spec":{"selector":{"version":"v2.0.0"}}}'
+ 

02-deployments/bluegreen/app-v1.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: my-app
+  namespace: bluegreen
+  labels:
+    app: my-app
+spec:
+  type: NodePort
+  ports:
+  - name: http
+    port: 80
+    targetPort: http
+
+  # Note here that we match both the app and the version
+  selector:
+    app: my-app
+    version: v1.0.0
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: my-app-v1
+  namespace: bluegreen
+  labels:
+    app: my-app
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: my-app
+      version: v1.0.0
+  template:
+    metadata:
+      labels:
+        app: my-app
+        version: v1.0.0
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9101"
+    spec:
+      containers:
+      - name: my-app
+        image: containersol/k8s-deployment-strategies
+        ports:
+        - name: http
+          containerPort: 8080
+        - name: probe
+          containerPort: 8086
+        env:
+        - name: VERSION
+          value: v1.0.0
+        livenessProbe:
+          httpGet:
+            path: /live
+            port: probe
+          initialDelaySeconds: 5
+          periodSeconds: 5
+        readinessProbe:
+          httpGet:
+            path: /ready
+            port: probe
+          periodSeconds: 5

02-deployments/bluegreen/app-v2.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: my-app-v2
+  namespace: bluegreen
+  labels:
+    app: my-app
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: my-app
+      version: v2.0.0
+  template:
+    metadata:
+      labels:
+        app: my-app
+        version: v2.0.0
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9101"
+    spec:
+      containers:
+      - name: my-app
+        image: containersol/k8s-deployment-strategies
+        ports:
+        - name: http
+          containerPort: 8080
+        - name: probe
+          containerPort: 8086
+        env:
+        - name: VERSION
+          value: v2.0.0
+        livenessProbe:
+          httpGet:
+            path: /live
+            port: probe
+          initialDelaySeconds: 5
+          periodSeconds: 5
+        readinessProbe:
+          httpGet:
+            path: /ready
+            port: probe
+          periodSeconds: 5