K8S 搭建 redis 7 集群(K8S 只在集群内访问)

mkdir -p /data/yaml/default/redis-cluster

cd /data/yaml/default/redis-cluster

vi sts.yaml
---
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-svc
  replicas: 6
  selector:
    matchLabels:
      app: redis-cluster
  template:
    metadata:
      labels:
        app: redis-cluster
    spec:
      containers:
      - name: redis
        image: redis:7
        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: data
          mountPath: /data
          readOnly: false
      volumes:
      - name: conf
        configMap:
          name: redis-cluster
          defaultMode: 0755
  volumeClaimTemplates:
  - metadata:
      name: data
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: "ceph-storage"
      resources:
        requests:
          storage: 2Gi

vi svc.yaml 
---
apiVersion: v1
kind: Service
metadata:
  name: redis-svc
spec:
  type: ClusterIP
  clusterIP: None
  ports:
  - port: 6379
    targetPort: 6379
    name: client
  - port: 16379
    targetPort: 16379
    name: gossip
  selector:
    app: redis-cluster

# 注意，这里 6379, 16379 都要开放。每个Redis群集节点都需要打开两个TCP连接。用于为客户端提供服务的普通Redis TCP端口，例如6379，加上通过向数据端口固定添加10000获得的端口，因此示例中为16379。

kubectl apply -f sts.yaml -f svc.yaml 

# 创建 redis cluster
kubectl exec -it redis-cluster-0 -- redis-cli --cluster create --cluster-replicas 1 $(kubectl get pods -l app=redis-cluster -o jsonpath='{range.items[*]}{.status.podIP}:6379 '  | sed "s/ :6379//g")

update-node.sh 用来修改重启后，redis pod ip 更改问题。
如果 redis cluster 需要外部访问需要在 k8s 中部署 Redis-Cluster-Proxy 提供代理