通过docker compose安装wordpress:5-php7.2-fpm

我们之前测试用的镜像wordpress:5-php7.2，它自带apache，我们当时用了nginx做反向代理。由于nginx比apache更加轻量级，所以本次测试改用wordpress:5-php7.2-fpm那样做好处是，直接使用nginx容器接收80端口的请求并传递给wordpress容器的fastcgi处理，fastcgi把匹配到的php文件给9000端口的fpm进行执行。
借用Fuck PHP-FPM with FastCGI一文的图片，就很好理解这个处理过程：
首先拉取镜像：
docker pull wordpress:5-php7.2-fpm
清除之前测试的容器：
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docker stop $(docker ps -q) 
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docker rm $(docker ps -aq)
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创建一个www.conf文件，内容如下，用于等会替换容器内默认的/usr/local/etc/php-fpm.d/www.conf：
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[www]
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user = www-data
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group = www-data
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listen = 0.0.0.0:9000
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pm = dynamic
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pm.max_children = 5
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pm.start_servers = 2
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pm.min_spare_servers = 1
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pm.max_spare_servers = 3
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修改nginx用的default.conf为如下：
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server {
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    listen       80;
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    server_name  localhost;
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​
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    access_log  /var/log/nginx/host.access.log  main;
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​
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    location / {
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        root   /var/www/html;
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        index  index.php index.html index.htm;
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        try_files $uri $uri/ /index.php?$args;
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    }
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​
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    error_page   500 502 503 504  /50x.html;
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    location = /50x.html {
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         root   /usr/share/nginx/html;
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    }
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​
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    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
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    location ~ \.php$ {
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        fastcgi_pass   wp.maxidea.com:9000;
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        fastcgi_index  index.php;
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        fastcgi_param SCRIPT_FILENAME /var/www/html$fastcgi_script_name;
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        include        fastcgi_params;
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    }
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}
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这里要注意一点，nginx容器需要访问得到wordpress-fpm容器内的/var/www/html目录的内容，所以在修改docker-compose文件时要注意把存储卷共享给两个容器一同访问。
修改docker-compose.yaml文件成如下：
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version: '3'
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​
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services:
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  db:
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    image: mysql:5.7
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    container_name: db.maxidea.com
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    volumes:
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    - ./db/data/:/var/lib/mysql/
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    env_file: 
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    - ./db/env.list
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    networks:
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      net2:
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        ipv4_address: 10.10.1.101
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    expose:
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    - "3306"
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​
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  wp:
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    image: wordpress:5-php7.2-fpm
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    container_name: wp.maxidea.com
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    volumes:
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    - ./fpm/www.conf:/usr/local/etc/php-fpm.d/www.conf:ro
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    - ./wp/wwwdata:/var/www/html
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    env_file: 
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    - ./wp/env.list
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    networks:
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      net2:
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        ipv4_address: 10.10.1.102
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    expose:
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    - "9000"
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    extra_hosts:
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    - "db.maxidea.com:10.10.1.101"
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    - "nx.maxidea.com:10.10.1.103"
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​
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  nginx:
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    image: nginx:alpine
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    container_name: nx.maxidea.com
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    volumes:
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    - ./nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
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    - ./wp/wwwdata:/var/www/html
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    networks:
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      net2:
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        ipv4_address: 10.10.1.103
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    expose:
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    - "80"
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    ports:
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    - "80:80"
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    extra_hosts:
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    - "db.maxidea.com:10.10.1.101"
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    - "wp.maxidea.com:10.10.1.102"
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​
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networks:
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  net2: 
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    ipam:
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      driver: default
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      config:
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        - subnet: "10.10.1.0/24"
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