Redis slave deployment - Kubernetes

Question

I have deployed a redis master deployment on my Kube cluster. Now I need a way to scale this. I need two replicas of this. In case there aren't two replicas, the deployment should start the replicas.

How do I write a deployment for that?

Answer 1

You can something like this, Make the reqquiured changes:

application/appl/redis-slave-deployment.yaml 

apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: redis-slave
  labels:
    app: redis
spec:
  selector:
    matchLabels:
      app: redis
      role: slave
      tier: backend
  replicas: 2
  template:
    metadata:
      labels:
        app: redis
        role: slave
        tier: backend
    spec:
      containers:
      - name: slave
        image: gcr.io/google_samples/gb-redisslave:v3
        resources:
          requests:
            cpu: 100m
            memory: 100Mi
        env:
        - name: GET_HOSTS_FROM
          value: dns
        ports:
        - containerPort: 637