redis - 在 Kubernetes 中公开 Redis 集群中的每个 pod

Question

我正在尝试在 Kubernetes 中设置 Redis 集群。主要要求是 Redis 集群中的所有节点都必须在 Kubernetes 外部可用。因此客户端可以直接连接每个节点。但我不知道如何以这种方式配置服务。

集群的基本配置。服务进入 k8s 没问题，但不能从外部完全访问。

    apiVersion: v1
    kind: ConfigMap
    metadata:
      name: redis-cluster
      labels:
        app: redis-cluster
    data:
      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 no
        protected-mode no
    ---
    apiVersion: v1
    kind: Service
    metadata:
      annotations:
        service.alpha.kubernetes.io/tolerate-unready-endpoints: "false"
      name: redis-cluster
      labels:
        app: redis-cluster
    spec:
      type: NodePort
      ports:
      - port: 6379
        targetPort: 6379
        name: client
      - port: 16379
        targetPort: 16379
        name: gossip
      selector:
        app: redis-cluster
    ---
    apiVersion: apps/v1beta1
    kind: StatefulSet
    metadata:
      name: redis-cluster
      labels:
        app: redis-cluster
    spec:
      serviceName: redis-cluster
      replicas: 6
      template:
        metadata:
          labels:
            app: redis-cluster
        spec:
          hostNetwork: true
          containers:
          - name: redis-cluster
            image: redis:4.0.10
            ports:
            - containerPort: 6379
              name: client
            - containerPort: 16379
              name: gossip
            command: ["redis-server"]
            args: ["/conf/redis.conf"]
            readinessProbe:
              exec:
                command:
                - sh
                - -c
                - "redis-cli -h $(hostname) ping"
              initialDelaySeconds: 15
              timeoutSeconds: 5
            livenessProbe:
              exec:
                command:
                - sh
                - -c
                - "redis-cli -h $(hostname) ping"
              initialDelaySeconds: 20
              periodSeconds: 3
            volumeMounts:
            - name: conf
              mountPath: /conf
              readOnly: false
          volumes:
          - name: conf
            configMap:
              name: redis-cluster
              items: 
              - key: redis.conf
                path: redis.conf

Answer 1

给定:

    spec:
      hostNetwork: true
      containers:
      - name: redis-cluster
        ports:
        - containerPort: 6379
          name: client 

您的 StatefulSet 似乎配置错​​误，因为如果 hostNetwork 为 true，您必须提供 hostPort ，根据 PodSpec 文档，该值应匹配 containerPort:

hostPort integer - Number of port to expose on the host. If specified, this must be a valid port number, 0 < x < 65536. If HostNetwork is specified, this must match ContainerPort.

https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.11/#containerport-v1-core