docker部署consul集群

小咪咪 2022-12-04 01:17 161阅读 0赞

通过docker部署consul集群。最新版本：1.8.3

官方Dockerfile：https://github.com/hashicorp/docker-consul/blob/master/0.X/Dockerfile

FROM alpine:3.12
    LABEL org.opencontainers.image.authors="Consul Team <consul@hashicorp.com>"
    
    ENV CONSUL_VERSION=1.8.3
    ENV HASHICORP_RELEASES=https://releases.hashicorp.com
    
    RUN addgroup consul && \
        adduser -S -G consul consul
    
    RUN set -eux && \
        apk add --no-cache ca-certificates curl dumb-init gnupg libcap openssl su-exec iputils jq libc6-compat && \
        gpg --keyserver pgp.mit.edu --recv-keys 91A6E7F85D05C65630BEF18951852D87348FFC4C && \
        mkdir -p /tmp/build && \
        cd /tmp/build && \
        apkArch="$(apk --print-arch)" && \
        case "${apkArch}" in \
            aarch64) consulArch='arm64' ;; \
            armhf) consulArch='armhfv6' ;; \
            x86) consulArch='386' ;; \
            x86_64) consulArch='amd64' ;; \
            *) echo >&2 "error: unsupported architecture: ${apkArch} (see ${HASHICORP_RELEASES}/consul/${CONSUL_VERSION}/)" && exit 1 ;; \
        esac && \
        wget ${HASHICORP_RELEASES}/consul/${CONSUL_VERSION}/consul_${CONSUL_VERSION}_linux_${consulArch}.zip && \
        wget ${HASHICORP_RELEASES}/consul/${CONSUL_VERSION}/consul_${CONSUL_VERSION}_SHA256SUMS && \
        wget ${HASHICORP_RELEASES}/consul/${CONSUL_VERSION}/consul_${CONSUL_VERSION}_SHA256SUMS.sig && \
        gpg --batch --verify consul_${CONSUL_VERSION}_SHA256SUMS.sig consul_${CONSUL_VERSION}_SHA256SUMS && \
        grep consul_${CONSUL_VERSION}_linux_${consulArch}.zip consul_${CONSUL_VERSION}_SHA256SUMS | sha256sum -c && \
        unzip -d /bin consul_${CONSUL_VERSION}_linux_${consulArch}.zip && \
        cd /tmp && \
        rm -rf /tmp/build && \
        gpgconf --kill all && \
        apk del gnupg openssl && \
        rm -rf /root/.gnupg && \
        consul version
    
    RUN mkdir -p /consul/data && \
        mkdir -p /consul/config && \
        chown -R consul:consul /consul
    
    RUN test -e /etc/nsswitch.conf || echo 'hosts: files dns' > /etc/nsswitch.conf
    
    VOLUME /consul/data
    
    EXPOSE 8300
    EXPOSE 8301 8301/udp 8302 8302/udp
    EXPOSE 8500 8600 8600/udp
    
    COPY docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
    ENTRYPOINT ["docker-entrypoint.sh"]
    CMD ["agent", "-dev", "-client", "0.0.0.0"]

consul容器启动时，agent将从 `/consul/config` 中读取配置JSON文件，数据将保留在 `/consul/data` 中，可以此进行存储持久化。

--------------------

这里启动4个Consul Agent。其中3个Server（选举出一个leader），1个Client。

*  主机说明：

<table> 
 <thead> 
  <tr> 
   <th>系统</th> 
   <th>ip</th> 
   <th>角色</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>CentOS 7.8</td> 
   <td>192.168.30.128</td> 
   <td>Server</td> 
  </tr> 
  <tr> 
   <td>CentOS 7.8</td> 
   <td>192.168.30.129</td> 
   <td>Server</td> 
  </tr> 
  <tr> 
   <td>CentOS 7.8</td> 
   <td>192.168.30.130</td> 
   <td>Server</td> 
  </tr> 
  <tr> 
   <td>CentOS 7.8</td> 
   <td>192.168.30.131</td> 
   <td>Client</td> 
  </tr> 
 </tbody> 
</table>

*  拉取镜像：

所有节点拉取镜像，

mkdir -p /consul/{ config,data}
    
    docker pull consul

*  集群部署：

第一个server启动，

docker run -d --name=consul-server1 --net=host -e CONSUL_BIND_INTERFACE=ens33 -v /consul/config:/consul/config -v /consul/data:/consul/data consul:latest agent -server -node=agent128 -bootstrap-expect=3 -client=0.0.0.0 -ui

docker exec consul-server1 consul members
    
    Node      Address              Status  Type    Build  Protocol  DC   Segment
    agent128  192.168.30.128:8301  alive   server  1.8.3  2         dc1  <all>

剩下两个Server启动并加入集群，

docker run -d --name=consul-server2 --net=host -e CONSUL_BIND_INTERFACE=ens33 consul agent -server -node=agent129 -client=0.0.0.0 -join 192.168.30.128
    
    docker run -d --name=consul-server3 --net=host -e CONSUL_BIND_INTERFACE=ens33 consul agent -server -node=agent130 -client=0.0.0.0 -join 192.168.30.128

Client启动并加入集群，

docker run -d --name=consul-client1 --net=host -e CONSUL_BIND_INTERFACE=ens33 consul agent -node=agent131 -client=0.0.0.0 -join 192.168.30.128

*  查看集群：

docker exec consul-server1 consul members
    
    Node      Address              Status  Type    Build  Protocol  DC   Segment
    agent128  192.168.30.128:8301  alive   server  1.8.3  2         dc1  <all>
    agent129  192.168.30.129:8301  alive   server  1.8.3  2         dc1  <all>
    agent130  192.168.30.130:8301  alive   server  1.8.3  2         dc1  <all>
    agent131  192.168.30.131:8301  alive   client  1.8.3  2         dc1  <default>

*  访问ui：

访问`192.168.30.128:8500/ui`，

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21pc3MxMTgxMjQ4OTgz_size_16_color_FFFFFF_t_70_pic_center]

consul集群部署完成。

--------------------

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