k8s搭建consul集群

妖狐艹你老母 2022-12-11 05:24 500阅读 0赞

本文主要通过k8s集群搭建Consul集群

满足条件：

1. 有一个部署好的k8s集群

2. 集群内部支持DNS服务

3.最好对consul及配置有相应的了解

consul学习参考文章：[https://blog.csdn.net/skh2015java/article/details/108853881][https_blog.csdn.net_skh2015java_article_details_108853881]

**部署**

1. 部署一个Service

\# consul-server-service.yaml

apiVersion: v1
    kind: Service
    metadata:
      name: consul-server
      labels:
        name: consul-server
    spec:
      selector:
        name: consul-server
      ports:
        - name: http
          port: 8500
          targetPort: 8500
        - name: https
          port: 8443
          targetPort: 8443
        - name: rpc
          port: 8400
          targetPort: 8400
        - name: serf-lan-tcp
          protocol: "TCP"
          port: 8301
          targetPort: 8301
        - name: serf-lan-udp
          protocol: "UDP"
          port: 8301
          targetPort: 8301
        - name: serf-wan-tcp
          protocol: "TCP"
          port: 8302
          targetPort: 8302
        - name: serf-wan-udp
          protocol: "UDP"
          port: 8302
          targetPort: 8302
        - name: server
          port: 8300
          targetPort: 8300
        - name: consul-dns
          port: 8600
          targetPort: 8600

kubect create -f consul-server-service.yaml

用于通过dns查找agent pod

2.以StatefulSet方式部署3个有状态的Consul Server

\# consul-server.yaml

apiVersion: apps/v1
    kind: StatefulSet
    metadata:
      name: consul-server
      labels:
        name: consul-server
    spec:
      serviceName: consul-server
      selector:
        matchLabels:
          name: consul-server
      replicas: 3
      template:
        metadata:
          labels:
            name: consul-server
        spec:
          terminationGracePeriodSeconds: 10
          containers:
            - name: consul
              image: consul:latest
              imagePullPolicy: IfNotPresent
              args:
                - "agent"
                - "-server"
                - "-bootstrap-expect=3"
                - "-ui"
                - "-data-dir=/consul/data"
                - "-bind=0.0.0.0"
                - "-client=0.0.0.0"
                - "-advertise=$(POD_IP)"
                - "-retry-join=consul-server-0.consul-server.$(NAMESPACE).svc.cluster.local"
                - "-retry-join=consul-server-1.consul-server.$(NAMESPACE).svc.cluster.local"
                - "-retry-join=consul-server-2.consul-server.$(NAMESPACE).svc.cluster.local"
                - "-domain=cluster.local"
                - "-disable-host-node-id"
              env:
                - name: POD_IP
                  valueFrom:
                    fieldRef:
                      fieldPath: status.podIP
                - name: NAMESPACE
                  valueFrom:
                    fieldRef:
                      fieldPath: metadata.namespace
              ports:
                - containerPort: 8500
                  name: http
                - containerPort: 8400
                  name: rpc
                - containerPort: 8443
                  name: https-port
                - containerPort: 8301
                  name: serf-lan
                - containerPort: 8302
                  name: serf-wan
                - containerPort: 8600
                  name: consul-dns
                - containerPort: 8300
                  name: server

kubect create -f   consul-server.yaml

![20200928172942697.png][]

3个consul server正常运行

3.对外NodePort方式对外暴露服务端口

\# consul-server-http.yaml

apiVersion: v1
    kind: Service
    metadata:
      name: consul-server-http
    spec:
      selector:
        name: consul-server
      type: NodePort
      ports:
        - protocol: TCP
          port: 8500
          targetPort: 8500
          nodePort: 30098
          name: consul-server-tcp

kubectl create -f consul-server-http.yaml

对外暴露节点端口是30098

通过控制台访问

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NraDIwMTVqYXZh_size_16_color_FFFFFF_t_70][]

consul-server-0是leader节点，共有3个Server节点

4.以daemonSet方式在工作节点上部署client

\#consul-client.yaml

apiVersion: apps/v1
    kind: DaemonSet
    metadata:
     name: consul-client
     labels:
      name: consul-client
    spec:
      selector:
        matchLabels:
          name: consul-client
      template:
        metadata:
          labels:
            name: consul-client
        spec:
          containers:
            - name: consul
              image: consul:latest
              imagePullPolicy: IfNotPresent
              args:
                - "agent"
                - "-data-dir=/consul/data"
                - "-bind=0.0.0.0"
                - "-client=0.0.0.0"
                - "-advertise=$(POD_IP)"
                - "-retry-join=consul-server-0.consul-server.$(NAMESPACE).svc.cluster.local"
                - "-retry-join=consul-server-1.consul-server.$(NAMESPACE).svc.cluster.local"
                - "-retry-join=consul-server-2.consul-server.$(NAMESPACE).svc.cluster.local"
                - "-domain=cluster.local"
                - "-disable-host-node-id"
              env:
                - name: POD_IP
                  valueFrom:
                    fieldRef:
                      fieldPath: status.podIP
                - name: NAMESPACE
                  valueFrom:
                    fieldRef:
                      fieldPath: metadata.namespace
              lifecycle:
                postStart:
                  exec:
                    command:
                      - /bin/sh
                      - -c
                      - consul reload
                preStop:
                  exec:
                    command:
                      - /bin/sh
                      - -c
                      - consul leave
              volumeMounts:
                - name: consul-data-dir
                  mountPath: /consul/data
              ports:
                - containerPort: 8500
                  hostPort: 8500
                  name: http
                - containerPort: 8400
                  name: rpc
                - containerPort: 8443
                  name: https
                - containerPort: 8301
                  name: serf-lan
                - containerPort: 8302
                  name: serf-wan
                - containerPort: 8600
                  name: consul
                - containerPort: 8300
                  name: server
          volumes:
            - name: consul-data-dir
              hostPath:
                path: /Users/xuan/desktop/consul/data
                type: DirectoryOrCreate

kubectl create -f consul-client.yaml

创建client

通过控制台可以看到有两个client加入了集群

![20200928173322653.png][]

整个Consul集群已经搭建完成

[https_blog.csdn.net_skh2015java_article_details_108853881]: https://blog.csdn.net/skh2015java/article/details/108853881
[20200928172942697.png]: /images/20221123/9c946df82b3e4111aa990889e87043ca.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NraDIwMTVqYXZh_size_16_color_FFFFFF_t_70]: /images/20221123/0aaa49bf8e78479f93aed312e4c44756.png
[20200928173322653.png]: /images/20221123/fc6ac73ff1b646db86425935c5af206a.png