EMQX Auto Cluster on kubernetes using ETCD server

In this story we will try together to build an EMQX brokers Auto Cluster using an ETCD server on kubernetes. We will use in this demo Minikube local Kubernetes.

First we will begin by deploying ETCD pod using etcd-deployment.yaml file. we need only one instance of ETCD container running on the cluster.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: etcd-deployment
  labels:
    app: etcd
spec:
  replicas: 1
  selector:
    matchLabels:
      app: etcd
  template:
    metadata:
      labels:
        app: etcd
    spec:
      containers:
        - name: etcd
          image: "bitnami/etcd:latest"
          imagePullPolicy: IfNotPresent
          env:
            - name: ALLOW_NONE_AUTHENTICATION
              value: "yes"
          ports:
            - name: port1
              containerPort: 2379
              protocol: TCP
            - name: port2
              containerPort: 2380
              protocol: TCP

Then we apply deployment:

kubectl apply -f etcd-deployment.yaml -n=dev

Now we add the etcd-service.yaml , I choose service type LoadBalancer to allow EMQX nodes to reach the etcd pod later for auto cluster registration.

apiVersion: v1
kind: Service
metadata:
  name: etcd-service
spec:
  selector:
    app: etcd
  type: LoadBalancer
  ports:
    - name: port1
      protocol: TCP
      port: 2379
      targetPort: 2379
    - name: port2
      protocol: TCP
      port: 2380
      targetPort…