routing.yaml

---
# regular service
apiVersion: v1
kind: Service
metadata:
  name: echo-hostname
spec:
  selector:
    app: echo-hostname
  ports:
  - port: 8080
    targetPort: 8080
---
# master service
apiVersion: v1
kind: Service
metadata:
  name: echo-hostname-master
  annotations:
    qoqo.dev/service-mode: active-standby
spec:
  selector:
    app: echo-hostname
  ports:
  - name: foo
    port: 8080
    targetPort: 8080
---
# dummy http servers that echo their own hostname in a response header
apiVersion: apps/v1
kind: Deployment
metadata:
  name: echo-hostname
spec:
  replicas: 2
  selector:
    matchLabels:
      app: echo-hostname
  template:
    metadata:
      labels:
        app: echo-hostname
    spec:
      containers:
      - image: alpine
        name: echo-hostname
        command:
        - sh
        - -c
        - |
          trap 'jobs -p | xargs kill -TERM' TERM
          apk add -U socat
          socat -s tcp-listen:8080,fork system:"echo 'HTTP/1.1 200 OK'; echo 'Hostname: $HOSTNAME'; echo" &
          wait
        readinessProbe:
          tcpSocket:
            port: 8080