最近在看CI/CD与k8s，作为前期准备，先熟悉一下Docker的基本操作，这里我们先用Docker部署几个服务

Docker搭建私有镜像仓库Docker Registry

在Docker Hub上搜索registry，目的是为了确定我们要拉取的镜像版本

https://registry.hub.docker.com/_/registry

最终确定最新的稳定版本2.8.1

拉取镜像


<span class="token function">docker</span> pull registry:2.8.1 
<span class="token function">docker</span> pull registry:2.8.1 
docker pull registry:2.8.1

运行registry实例


<span class="token function">docker</span> run -d -p <span class="token number">5000</span>:5000 registry:2.8.1 
<span class="token function">docker</span> run -d -p <span class="token number">5000</span>:5000 registry:2.8.1 
docker run -d -p 5000:5000 registry:2.8.1

说明：

-d 后台运行
-p 端口映射，容器端口:主机端口

查看运行状态


<span class="token function">docker</span> <span class="token function">ps</span> 
<span class="token function">docker</span> <span class="token function">ps</span> 
docker ps

打标签上传


 <span class="token function">docker</span> pull nginxLalpine  <span class="token function">docker</span> images <span class="token function">docker</span> tag nginx:alpine <span class="token number">127.0</span>.0.1:5000/nginx:alpine <span class="token function">docker</span> push <span class="token number">127.0</span>.0.1:5000/nginx:alpine 
 <span class="token function">docker</span> pull nginxLalpine  <span class="token function">docker</span> images <span class="token function">docker</span> tag nginx:alpine <span class="token number">127.0</span>.0.1:5000/nginx:alpine <span class="token function">docker</span> push <span class="token number">127.0</span>.0.1:5000/nginx:alpine 
 docker pull nginxLalpine  docker images docker tag nginx:alpine 127.0.0.1:5000/nginx:alpine docker push 127.0.0.1:5000/nginx:alpine

说明：

因为上传的目标不是默认的Docker Hub，而是本地私有仓库，所以镜像的名字前必须加仓库地址

验证是否推送成功


<span class="token function">docker</span> rmi <span class="token number">127.0</span>.0.1:5000/nginx:alpine <span class="token function">docker</span> pull <span class="token number">127.0</span>.0.1:5000/nginx:alpine 
<span class="token function">docker</span> rmi <span class="token number">127.0</span>.0.1:5000/nginx:alpine <span class="token function">docker</span> pull <span class="token number">127.0</span>.0.1:5000/nginx:alpine 
docker rmi 127.0.0.1:5000/nginx:alpine docker pull 127.0.0.1:5000/nginx:alpine

查看Registry仓库镜像，Registry只提供了RESTful API


<span class="token function">curl</span> <span class="token number">127.0</span>.0.1:5000/v2/_catalog <span class="token function">curl</span> <span class="token number">127.0</span>.0.1:5000/v2/nginx/tags/list 
<span class="token function">curl</span> <span class="token number">127.0</span>.0.1:5000/v2/_catalog <span class="token function">curl</span> <span class="token number">127.0</span>.0.1:5000/v2/nginx/tags/list 
curl 127.0.0.1:5000/v2/_catalog curl 127.0.0.1:5000/v2/nginx/tags/list

Docker搭建WordPress网站

网络架构图

在这里插入图片描述

拉取相关镜像


<span class="token function">docker</span> pull wordpress:5 <span class="token function">docker</span> pull mariadb:10 <span class="token function">docker</span> pull nginx:alpine 
<span class="token function">docker</span> pull wordpress:5 <span class="token function">docker</span> pull mariadb:10 <span class="token function">docker</span> pull nginx:alpine 
docker pull wordpress:5 docker pull mariadb:10 docker pull nginx:alpine

运行MariaDB实例


 <span class="token function">docker</span> run -d --rm <span class="token punctuation">\</span> --name wp-mariadb --env <span class="token assign-left variable">MARIADB_DATABASE</span><span class="token operator">=</span>db <span class="token punctuation">\</span> --env <span class="token assign-left variable">MARIADB_USER</span><span class="token operator">=</span>wp <span class="token punctuation">\</span> --env <span class="token assign-left variable">MARIADB_PASSWORD</span><span class="token operator">=</span><span class="token number">123</span> <span class="token punctuation">\</span> --env <span class="token assign-left variable">MARIADB_ROOT_PASSWORD</span><span class="token operator">=</span><span class="token number">123</span> <span class="token punctuation">\</span> mariadb:10 
 <span class="token function">docker</span> run -d --rm <span class="token punctuation">\</span> --name wp-mariadb --env <span class="token assign-left variable">MARIADB_DATABASE</span><span class="token operator">=</span>db <span class="token punctuation">\</span> --env <span class="token assign-left variable">MARIADB_USER</span><span class="token operator">=</span>wp <span class="token punctuation">\</span> --env <span class="token assign-left variable">MARIADB_PASSWORD</span><span class="token operator">=</span><span class="token number">123</span> <span class="token punctuation">\</span> --env <span class="token assign-left variable">MARIADB_ROOT_PASSWORD</span><span class="token operator">=</span><span class="token number">123</span> <span class="token punctuation">\</span> mariadb:10 
 docker run -d --rm \ --name wp-mariadb --env MARIADB_DATABASE=db \ --env MARIADB_USER=wp \ --env MARIADB_PASSWORD=123 \ --env MARIADB_ROOT_PASSWORD=123 \ mariadb:10

说明：

我们指定数据库为db，用户名为wp，密码为123，管理员密码为123

验证数据库，通过执行数据库客户端工具进入数据库


<span class="token function">docker</span> <span class="token builtin class-name">exec</span> -it wp-mariadb mysql -u wp -p 
<span class="token function">docker</span> <span class="token builtin class-name">exec</span> -it wp-mariadb mysql -u wp -p 
docker exec -it wp-mariadb mysql -u wp -p

查看容器的IP


<span class="token function">docker</span> inspect wp-mariadb <span class="token operator">|</span> <span class="token function">grep</span> IPAddress 
<span class="token function">docker</span> inspect wp-mariadb <span class="token operator">|</span> <span class="token function">grep</span> IPAddress 
docker inspect wp-mariadb | grep IPAddress

运行wordpress实例


 <span class="token function">docker</span> run -d --rm <span class="token punctuation">\</span> --name wp --env <span class="token assign-left variable">WORDPRESS_DB_HOST</span><span class="token operator">=</span><span class="token number">172.17</span>.0.2 <span class="token punctuation">\</span> --env <span class="token assign-left variable">WORDPRESS_DB_USER</span><span class="token operator">=</span>wp <span class="token punctuation">\</span> --env <span class="token assign-left variable">WORDPRESS_DB_PASSWORD</span><span class="token operator">=</span><span class="token number">123</span> <span class="token punctuation">\</span> --env <span class="token assign-left variable">WORDPRESS_DB_NAME</span><span class="token operator">=</span>db <span class="token punctuation">\</span> wordpress:5 
 <span class="token function">docker</span> run -d --rm <span class="token punctuation">\</span> --name wp --env <span class="token assign-left variable">WORDPRESS_DB_HOST</span><span class="token operator">=</span><span class="token number">172.17</span>.0.2 <span class="token punctuation">\</span> --env <span class="token assign-left variable">WORDPRESS_DB_USER</span><span class="token operator">=</span>wp <span class="token punctuation">\</span> --env <span class="token assign-left variable">WORDPRESS_DB_PASSWORD</span><span class="token operator">=</span><span class="token number">123</span> <span class="token punctuation">\</span> --env <span class="token assign-left variable">WORDPRESS_DB_NAME</span><span class="token operator">=</span>db <span class="token punctuation">\</span> wordpress:5 
 docker run -d --rm \ --name wp --env WORDPRESS_DB_HOST=172.17.0.2 \ --env WORDPRESS_DB_USER=wp \ --env WORDPRESS_DB_PASSWORD=123 \ --env WORDPRESS_DB_NAME=db \ wordpress:5

先准备一份nginx配置文件 /opt/docker/wordpress/wp.conf


 server <span class="token punctuation">{<!-- --></span> listen <span class="token number">80</span><span class="token punctuation">;</span> default_type text/html<span class="token punctuation">;</span> location / <span class="token punctuation">{<!-- --></span> proxy_http_version <span class="token number">1.1</span><span class="token punctuation">;</span> proxy_set_header Host <span class="token variable">$host</span><span class="token punctuation">;</span> proxy_pass http://172.17.0.3<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token punctuation">}</span> 
 server <span class="token punctuation">{<!-- --></span> listen <span class="token number">80</span><span class="token punctuation">;</span> default_type text/html<span class="token punctuation">;</span> location / <span class="token punctuation">{<!-- --></span> proxy_http_version <span class="token number">1.1</span><span class="token punctuation">;</span> proxy_set_header Host <span class="token variable">$host</span><span class="token punctuation">;</span> proxy_pass http://172.17.0.3<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token punctuation">}</span> 
 server { listen 80; default_type text/html; location / { proxy_http_version 1.1; proxy_set_header Host $host; proxy_pass http://172.17.0.3; } }

运行nginx实例


 <span class="token function">docker</span> run -d --rm <span class="token punctuation">\</span> -p <span class="token number">80</span>:80 <span class="token punctuation">\</span> -v <span class="token variable"><span class="token variable">`</span><span class="token builtin class-name">pwd</span><span class="token variable">`</span></span>/wp.conf:/etc/nginx/conf.d/default.conf <span class="token punctuation">\</span> nginx:alpine 
 <span class="token function">docker</span> run -d --rm <span class="token punctuation">\</span> -p <span class="token number">80</span>:80 <span class="token punctuation">\</span> -v <span class="token variable"><span class="token variable">`</span><span class="token builtin class-name">pwd</span><span class="token variable">`</span></span>/wp.conf:/etc/nginx/conf.d/default.conf <span class="token punctuation">\</span> nginx:alpine 
 docker run -d --rm \ -p 80:80 \ -v `pwd`/wp.conf:/etc/nginx/conf.d/default.conf \ nginx:alpine

验证是否启动成功


<span class="token function">docker</span> <span class="token function">ps</span> 
<span class="token function">docker</span> <span class="token function">ps</span> 
docker ps