kube-deployment.yaml

# application namespace
apiVersion: v1
kind: Namespace
metadata:
  name: playground-websocket

---

# REDIS (service and deployment)

apiVersion: v1
kind: Service
metadata:
  name: redis-srv
  namespace: playground-websocket
spec:
  type: NodePort
  selector:
    app: redis
  ports:
    - port: 6379
      targetPort: 6379

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis-deployment
  namespace: playground-websocket
spec:
  replicas: 1
  selector:
    matchLabels:
      app: redis
  template:
    metadata:
      labels:
        app: redis
    spec:
      containers:
        - name: redis
          image: redis
          ports:
            - containerPort: 6379

---

# application service, ingresses and deployment
apiVersion: v1
kind: Service
metadata:
  name: playground-srv
  namespace: playground-websocket
spec:
  selector:
    app: playground
  ports:
    - port: 8080
      targetPort: 8080


---

# first ingress to serve all the resources that doesn't require a sticky session
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: playground-ingress
  namespace: playground-websocket
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/proxy-connect-timeout: "86400"
    nginx.ingress.kubernetes.io/proxy-read-timeout: "86400"
    nginx.ingress.kubernetes.io/proxy-write-timeout: "86400"
spec:
  rules:
    - http:
        paths:
          - path: /playground
            pathType: Prefix
            backend:
              service:
                name: playground-srv
                port:
                  number: 8080

---

# second ingress to serve only the requests that requires a sticky session
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: playground-ingress-sticky
  namespace: playground-websocket
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/affinity: cookie
    nginx.ingress.kubernetes.io/session-cookie-path: /playground/w
    nginx.ingress.kubernetes.io/affinity-mode: persistent
    nginx.ingress.kubernetes.io/proxy-connect-timeout: "86400"
    nginx.ingress.kubernetes.io/proxy-read-timeout: "86400"
    nginx.ingress.kubernetes.io/proxy-write-timeout: "86400"
spec:
  rules:
    - http:
        paths:
          - path: /playground/w
            pathType: Prefix
            backend:
              service:
                name: playground-srv
                port:
                  number: 8080

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: playground-deployment
  namespace: playground-websocket
  labels:
    app: playground
spec:
  replicas: 3
  selector:
    matchLabels:
      app: playground
  template:
    metadata:
      labels:
        app: playground
    spec:
      containers:
        - name: playground-websocket
          image: amodolo/playground-websocket
          ports:
            - containerPort: 8080
          env:
            - name: REDIS_HOST
              value: 'redis-srv'
            - name: REDIS_PORT
              value: '6379'