Docker-compose编排，consul自动发现和更新

女爷i 2023-10-04 08:17 5阅读 0赞

## 一、Docker-compose部署nginx ##

1.  环境部署所有主机安装docker-ce  
    [(内容为docker基础)][docker]

yum -y install yum-utils device-mapper-persistent-data lvm2
    yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
    yum -y install docker-ce
    echo net.ipv4.ip_forward=1 >> /etc/sysctl.conf 
    sysctl -p
    systemctl restart docker

1.  下载安装docker-compose

//下载compose（上传docker_compose）
    curl -L https://github.com/docker/compose/releases/download/1.21.1/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
    cp -p docker-compose /usr/local/bin/
    chmod +x /usr/local/bin/docker-compose

1.  创建nginx的Dockerfile文件  
    [REFERENCE][]

[root@compute1 compose_nginx]# tree nginx/
    nginx/
    ├── Dockerfile
    └── nginx-1.12.2.tar.gz
    
    0 directories, 2 files

mkdir /root/compose_nginx
    cd ~/compose.nginx
    mkdidr nginx && cd nginx
    vim Dockerfile
    FROM centos:7
    MAINTAINER XWP
    RUN yum -y install gcc gcc-c++ pcre-devel zlib-devel make
    RUN useradd -M -s /sbin/nologin nginx
    ADD nginx-1.12.2.tar.gz /tmp/
    WORKDIR /tmp/nginx-1.12.2/
    RUN ./configure \
    --prefix=/usr/local/nginx \
    --user=nginx \
    --group=nginx \
    --with-http_stub_status_module && make && make install
    ENV PATH /usr/local/nginx/sbin:$PATH
    EXPOSE 80
    CMD ["nginx","-g","daemon off;"]

1.  编辑docker-compose.yml容器编排文件

vim /root/compose_nginx/docker-compose.yml
    
    version: "3"
    services:
      nginx:
        hostname: nginx
        build:
          context: ./nginx
          dockerfile: Dockerfile
        ports:
          - 80:80
        networks:
          - cluster
        volumes:
          - ./html:/usr/local/nginx/html
    networks:
      cluster:

1.  编辑测试网页

mkdir /root/compose_nginx/html/
    vim /root/compose_nginx/html/index.html
    
    <h1>this is test web</h1>

1.  启动容器

[root@consul compose_nginx]# docker-compose up -d

1.  浏览器测试  
    ![在这里插入图片描述][20210316100138462.jpg_pic_center]

## 二、docker-consul 集群搭建 ##

环境：两台centos7  
第一台consul server IP：192.168.100.101 安装软件包：Docker-ce、Compose 3 、Consul、Consul-template  
第二台Registrator IP：192.168.100.100 安装软件包：需求的软件包：Docker-ce 、registrator

### 2.1 consul-server配置 ###

1.  安装consul

unzip consul_0.9.2_linux_amd64.zip 
    mv consul /usr/bin/

1.  建立consul服务

consul agent \
    > -server \
    > -bootstrap \
    > -ui \
    > -data-dir=/var/lib/consu-data \
    > -bind=192.168.100.101 \
    > -client=0.0.0.0 \
    > -node=consul-server1 &

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NDgwMDIw_size_1_color_FFFFFF_t_70_pic_center]  
3. 查看集群信息

consul members

### 2.2 Registrator配置 ###

#配置192.168.226.133后端节点
    [root@localhost ~]# docker run -d \
    > --name=registrator \						#下载registrator容器
    > --net=host \							#使用host网络
    > -v /var/run/docker.sock:/tmp/docker.sock \			#数据卷挂载（使用的是系统默认的）
    > --restart=always \						#重启策略（遇到问题会重启）
    > gliderlabs/registrator:latest \				#下载的仓库名称/镜像名称
    > -ip=192.168.100.100 \						#指向本地服务器IP地址
    > consul://192.168.100.100:8500					#指向注册中心的地址

*  创建两个nginx节点

docker run -itd -p:83:80 --name test1 -h test1 nginx
    docker run -itd -p:84:80 --name test2 -h test2 nginx
    #-name 给容器命名 -h 设置容器主机名

*  浏览器登录consul-server查看  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NDgwMDIw_size_1_color_FFFFFF_t_70_pic_center 1]  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NDgwMDIw_size_1_color_FFFFFF_t_70_pic_center 2]  
    可以看出，consul实现了自动发现节点的功能。

### 2.3 consul-template自动更新配置 ###

1.  consul-server准备模板文件

vim nginx.ctmpl
    
    upstream http_backend {
        
      {
        {
        range service "nginx"}}
      server {
        {
        .Address}}:{
        {
        .Port}};
      {
        {
        end}}
    }
    
    server {
        
      listen 88;
      server_name localhost 192.168.100.100;
      access_log /var/log/nginx/contain_nginx.log;
      index index.html index.php;
      location / {
        
        proxy_set_header HOST $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Client-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://http_backend;
      }
    }

1.  配置，安装template

unzip consul-template_0.19.3_linux_amd64.zip 
    mv consul-template /usr/bin/
    consul-template -consul-addr 192.168.100.101:8500 -template "/root/consul/nginx.ctmpl:/usr/local/nginx/conf/vhost/test.conf:/usr/local/nginx/sbin/nginx -s reload" --log-level=info

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NDgwMDIw_size_1_color_FFFFFF_t_70_pic_center 3]  
3. 测试结果  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NDgwMDIw_size_1_color_FFFFFF_t_70_pic_center 4]

[docker]: https://blog.csdn.net/qq_46480020/article/details/114549863?spm=1001.2014.3001.5501
[REFERENCE]: https://blog.csdn.net/qq_46480020/article/details/114644593?spm=1001.2014.3001.5501
[20210316100138462.jpg_pic_center]: https://img-blog.csdnimg.cn/20210316100138462.jpg#pic_center
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NDgwMDIw_size_1_color_FFFFFF_t_70_pic_center]: https://img-blog.csdnimg.cn/20210316101655229.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NDgwMDIw,size_1,color_FFFFFF,t_70#pic_center
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NDgwMDIw_size_1_color_FFFFFF_t_70_pic_center 3]: https://img-blog.csdnimg.cn/20210316110006597.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NDgwMDIw,size_1,color_FFFFFF,t_70#pic_center
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