Docker Swarm下Consul多DC部署

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在前一篇中完成了swarm的搭建和测试，继续使用上一个的overlay网桥。Docker集群搭建及网络互通配置

consul集群

使用前一个配置好的网卡地址prod-overlay

查看一下overlay网卡分配的网段，第一个是网段，第二个是网关

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[root@bogon consul]# docker network inspect --format {{.IPAM.Config}} prod-overlay
[{10.0.0.0/24  10.0.0.1 map[]}]

直接上compose文件

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version: '3'
networks:
  # 配置此网桥名
  prod-overlay:
    # true表示网桥存在，false代表网桥不存在，启动容器并创建
    external: true
services:
  consul1:
    image: consul:1.4.4
    hostname: "consul1"
    container_name: "dc1consul1"
    ports:
      - 8500:8500
    networks:
      # 指定overlay的网桥名
      prod-overlay:
        # 需要指定当前镜像的IP
        ipv4_address: 10.0.0.10
    # 然后在consul的命令中指定-bind ip, 因为都是内网，所以不用配置-advertise-wan
    # 指定一下数据中心, 也就是现在的VM-1
    command: "agent -server -bootstrap-expect 3 -ui -client 0.0.0.0 -bind 10.0.0.10 -node servernode1 -datacenter dc1"
  consul2:
    image: consul:1.4.4
    hostname: "consul2"
    container_name: "dc1consul2"
    networks:
      prod-overlay:
        ipv4_address: 10.0.0.11
    command: "agent -server -join consul1 -disable-host-node-id -client 0.0.0.0 -bind 10.0.0.11 -node servernode2 -datacenter dc1"
    depends_on: 
      - consul1
  consul3:
    image: consul:1.4.4
    hostname: "consul3"
    container_name: "dc1consul3"
    networks:
      prod-overlay:
        ipv4_address: 10.0.0.12
    command: "agent -server -join consul1 -disable-host-node-id -client 0.0.0.0 -bind 10.0.0.12 -node servernode3 -datacenter dc1"
    depends_on:
      - consul1
  consul4:
    image: consul:1.4.4
    hostname: "consul4"
    container_name: "dc1consul4"
    ports:
      - 9500:8500
    networks:
      prod-overlay:
        ipv4_address: 10.0.0.13
    command: "agent -join consul1 -disable-host-node-id -client 0.0.0.0 -bind 10.0.0.13 -node clientnode1 -datacenter dc1"
  consul5:
    image: consul:1.4.4
    hostname: "consul5"
    container_name: "dc1consul5"
    ports:
      - 10500:8500
    networks:
      prod-overlay:
        ipv4_address: 10.0.0.14
    command: "agent -join consul1 -disable-host-node-id -client 0.0.0.0 -bind 10.0.0.14 -node clientnode2 -datacenter dc1"

在这里是启动了3个Server，2个Client，所有状态正常，可以映射Client端口做服务注册

在VM-2上，使用相同compose文件，修改数据中心为dc2，更改所有IP就行了。

在任意数据中心的Server上，执行join就可以相互连接了。

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/ # consul join -wan 10.0.0.10
Successfully joined cluster by contacting 1 nodes.
/ # consul members -wan
Node             Address         Status  Type    Build  Protocol  DC   Segment
servernode1.dc1  10.0.0.10:8302  alive   server  1.4.4  2         dc1  <all>
servernode1.dc2  10.0.0.20:8302  alive   server  1.4.4  2         dc2  <all>
servernode2.dc1  10.0.0.11:8302  alive   server  1.4.4  2         dc1  <all>
servernode2.dc2  10.0.0.21:8302  alive   server  1.4.4  2         dc2  <all>
servernode3.dc1  10.0.0.12:8302  alive   server  1.4.4  2         dc1  <all>
servernode3.dc2  10.0.0.22:8302  alive   server  1.4.4  2         dc2  <all>

访问两个dc任意一个服务端的页面，都可以看到两个dc的信息

注：网际间gossip协议加密后期再考虑

结束！🔚

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