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Blue Green Deployments

Voayger supports Blue Green deployments using weighted loadbalancing for backend pods. Following example illustrates a weighted loadbalance scenario.

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  labels:
    app: deployment
    app-version: v1
  name: deployment-1
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: deployment
      app-version: v1
  template:
    metadata:
      labels:
        app: deployment
        app-version: v1
      annotations:
          ingress.appscode.com/backend-weight: "90"
    spec:
      containers:
      - env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              apiVersion: v1
              fieldPath: metadata.name
        image: appscode/test-server:1.1
        imagePullPolicy: IfNotPresent
        name: server
        ports:
        - containerPort: 8080
          name: http-1
          protocol: TCP
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  labels:
    app: deployment
    app-version: v2
  name: deploymet-2
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: deployment
      app-version: v2
  template:
    metadata:
      labels:
        app: deployment
        app-version: v2
      annotations:
            ingress.appscode.com/backend-weight: "10"
    spec:
      containers:
      - env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              apiVersion: v1
              fieldPath: metadata.name
        image: appscode/test-server:1.1
        imagePullPolicy: IfNotPresent
        name: server
        ports:
        - containerPort: 8080
          name: http-1
          protocol: TCP

Two different workload with the annotation ingress.appscode.com/backend-weight and one single service pointing to them

apiVersion: v1
kind: Service
metadata:
  name: deployment-svc
  namespace: default
spec:
  ports:
  - name: http-1
    port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    app: deployment

The following ingress will forward 90% traffic to deployment-1 and 10% to deployment-2

apiVersion: voyager.appscode.com/v1beta1
kind: Ingress
metadata:
  name: test-ing
  namespace: default
spec:
  rules:
  - http:
      paths:
      - backend:
          serviceName: deployment-svc
          servicePort: 80
        path: /testpath

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