apiVersion: v1
kind: Template
metadata:
  name: ${NAME}
  labels:
    name: ${NAME}
  annotations:
    description: Redis master/slave templates based on Statefulsets
parameters:
- name: NAME
  description: Application name
  required: true
  value: "redis"
- name: CPU
  description: "Number of CPUs per node in milli cores"
  required: true
  value: "500m"
- name: RAM
  description: "RAM size per node in gigabytes"
  required: true
  value: "1Gi"
- name: STORAGE
  description: "STORAGE size per node in gigabytes"
  required: true
  value: "1Gi"
- name: DOCKER_PATH_AND_IMAGE
  description: "Docker Image"
  required: true
  value: "redis:6.0.8"
objects:
- apiVersion: v1
  kind: ConfigMap
  metadata:
   name: redis-cluster
  data:
    update-node.sh: |
      #!/bin/sh
      REDIS_NODES="/data/nodes.conf"
      sed -i -e "/myself/ s/[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}/${POD_IP}/" ${REDIS_NODES}
      exec "$@"
    redis.conf: |+
      cluster-enabled yes
      cluster-require-full-coverage no
      cluster-node-timeout 15000
      cluster-config-file /data/nodes.conf
      cluster-migration-barrier 1
      appendonly yes
      protected-mode no
- apiVersion: apps/v1
  kind: StatefulSet
  metadata:
    name: redis-cluster
  spec:
   serviceName: redis-cluster
   replicas: 6
   selector:
     matchLabels:
       app: redis-cluster
   template:
     metadata:
       labels:
         app: redis-cluster
     spec:
       containers:
       - name: redis
         image: ${DOCKER_PATH_AND_IMAGE}
         ports:
         - containerPort: 6379
           name: client
         - containerPort: 16379
           name: gossip
         command: ["/conf/update-node.sh", "redis-server", "/conf/redis.conf"]
         env:
         - name: POD_IP
           valueFrom:
             fieldRef:
               fieldPath: status.podIP
         volumeMounts:
         - name: conf
           mountPath: /conf
           readOnly: false
         - name: redis-data
           mountPath: /data
           readOnly: false
       volumes:
       - name: conf
         configMap:
           name: redis-cluster
           defaultMode: 0755
   volumeClaimTemplates:
   - metadata:
       name: redis-data
     spec:
       accessModes: [ "ReadWriteOnce" ]
       resources:
         limits:
           memory: 1Gi
         requests:
           storage: 1Gi
           memory: 500Mi
- apiVersion: v1
  kind: Service
  metadata:
    name: redis-cluster
  spec:
    type: ClusterIP
    ports:
    - port: 6379
      targetPort: 6379
      name: client
    - port: 16379
      targetPort: 16379
      name: gossip
    selector:
      app: redis-cluster