Kubernetes集群部署Redis单机版

创建 ConfigMap

我们可以通过 ConfigMap 来对容器中 redis 应用的配置进行管理，如自定义配置文件、密码、日志路径等。

apiVersion: v1
kind: ConfigMap
metadata:
  name: singlenode-redis-conf
data:
  redis.conf: |
    bind 0.0.0.0
    port 6379
    requirepass 123456
    pidfile .pid
    appendonly yes
    cluster-config-file nodes-6379.conf
    pidfile /data/k8s/redis/log/redis-6379.pid
    cluster-config-file /data/k8s/redis/conf/redis.conf
    dir /data/k8s/redis/data/
    logfile "/data/k8s/redis/log/redis-6379.log"
    cluster-node-timeout 5000
    protected-mode no

执行以下命令创建 ConfigMap：

kubectl apply -f singlenode-redis-conf.yaml

创建 StatefulSet

由于 redis 是一个有状态服务，所以需要创建一个 StatefulSet，并把数据挂载到宿主机上。

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: singlenode-redis
spec:
  replicas: 1
  serviceName: singlenode-redis
  selector:
    matchLabels:
      name: singlenode-redis
  template:
    metadata:
      labels:
        name: singlenode-redis
    spec:
      initContainers:
        - name: init-singlenode-redis
          image: busybox
          command: ['sh', '-c', 'mkdir -p /data/k8s/redis/log/; mkdir -p /data/k8s/redis/conf/; mkdir -p /data/k8s/redis/data/']
          volumeMounts:
            - name: data
              mountPath: /data/k8s/redis/
      containers:
        - name: singlenode-redis
          image: redis:5.0.6
          imagePullPolicy: IfNotPresent
          command:
            - sh
            - -c
            - "exec redis-server /data/k8s/redis/conf/redis.conf"
          ports:
            - containerPort: 6379
              name: redis
              protocol: TCP
          volumeMounts:
            - name: redis-config
              mountPath: /data/k8s/redis/conf/
            - name: data
              mountPath: /data/k8s/redis/
      volumes:
        - name: redis-config
          configMap:
            name: singlenode-redis-conf
        - name: data
          hostPath:
            path: /data/k8s/redis/

执行以下命令创建 StatefulSet：

kubectl apply -f singlenode-redis-statefulset.yaml

查看 pod 运行状况：

kubectl get pod | grep singlenode-redis

创建 Service

通过创建 service，提供对外访问 pod 的服务接口。

apiVersion: v1
kind: Service
metadata:
  name: singlenode-redis
  labels:
    name: singlenode-redis
spec:
  type: NodePort
  ports:
    - name: singlenode-redis
      port: 6379
      targetPort: 6379
      nodePort: 31379
  selector:
    name: singlenode-redis

执行以下命令创建 Service：

kubectl apply -f singlenode-redis-service.yaml

查看 service 运行状况：

kubectl get svc | grep singlenode-redis

验证 redis 是否部署成功

我这里使用的是 Redis Desktop Manager 客户端连接验证，下载地址：https://macwk.com/soft/redis-desktop-manager