apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: redis
spec:
  serviceName: "redis"
  replicas: 3
  selector:
    matchLabels:
      app: redis
  template:
    metadata:
      labels:
        app: redis
    spec:
      containers:
      - name: redis
        image: redis:alpine
        command: ["sh", "-c"]
        # Aquest script és un exemple molt bàsic:
        # Si soc el pod 0, soc el mestre.
        # Si no, em connecto al pod 0 (redis-0.redis) com a rèplica.
        args:
        - |
          if [ "$(hostname)" = "redis-0" ]; then
            redis-server
          else
            redis-server --replicaof redis-0.redis 6379
          fi
        volumeMounts:
        - name: dades
          mountPath: /data
  volumeClaimTemplates:
  - metadata:
      name: dades
    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 1Gi