docker-compose搭建wordpress

前言

我们都知道，docker是一个运行容器的软件。同时它也配置了一个运行一组容器的软件，叫做docker-compose。当我们使用非常小规模容器化应用的时候，我们可以使用此docker-compose去做。

docker-compose的介绍

根据官网的描述，docker-compose是一个能够管理多容器的工具，可以使用yaml文件来编写所需资源，并一键管理。

(资料图)

docker-compose支持的功能有：

[root@master wordpress]# docker-composeCommands:  build              Build or rebuild services  bundle             Generate a Docker bundle from the Compose file  config             Validate and view the Compose file  create             Create services  down               Stop and remove containers, networks, images, and volumes  events             Receive real time events from containers  exec               Execute a command in a running container  help               Get help on a command  images             List images  kill               Kill containers  logs               View output from containers  pause              Pause services  port               Print the public port for a port binding  ps                 List containers  pull               Pull service images  push               Push service images  restart            Restart services  rm                 Remove stopped containers  run                Run a one-off command  scale              Set number of containers for a service  start              Start services  stop               Stop services  top                Display the running processes  unpause            Unpause services  up                 Create and start containers  version            Show the Docker-Compose version information

安装docker-compose(以Linux为例)

sudo yum install -y docker && systemctl start dockersudo curl -L "https://github.com/docker/compose/releases/download/v2.2.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/bin/docker-composesudo chmod +x /usr/bin/docker-compose #需要root权限

测试docker-compose是否安装成功：

sudo docker-compose version

docker-compose配置文件编写并启动

mkdir -p /usr/local/wordpress && cd /usr/local/wordpressnano docker-compose.yml #编辑docker-compose.yml文件

version: "3"services:   db:     image: mysql:8.0     command:      - --default_authentication_plugin=mysql_native_password      - --character-set-server=utf8mb4      - --collation-server=utf8mb4_unicode_ci          volumes:       - db_data:/var/lib/mysql     restart: always     environment:       MYSQL_ROOT_PASSWORD: somewordpress       MYSQL_DATABASE: wordpress       MYSQL_USER: wordpress       MYSQL_PASSWORD: wordpress   wordpress:     depends_on:       - db     image: wordpress:latest     ports:       - "80:80"     restart: always     environment:       WORDPRESS_DB_HOST: db:3306       WORDPRESS_DB_USER: wordpress       WORDPRESS_DB_PASSWORD: wordpressvolumes:  db_data:

编辑完毕之后，使用以下命令来启动：

sudo docker-compose up -d

但是，

Getting the final child"s pid from pipe caused: EOF: unknown

如果遇到这个问题的话，原因是内存碎片过多，需要释放cache以消除问题。

echo 3 > /proc/sys/vm/drop_caches  #临时解决echo 1 > /proc/sys/vm/compact_memory  #永久解决sysctl -w vm.compact_memory=1   #永久解决

详情可以参考此文，特此感谢。

Getting the final child"s pid from pipe caused: EOF: unknown

然后就会看到以下的结果：

[root@master wordpress]# docker-compose up -dwordpress_db_1 is up-to-dateStarting wordpress_wordpress_1 ...Starting wordpress_wordpress_1 ... done

然后输入http://ip:80，查看是否已经正常启动即可。

参考

Docker Compose overview | Docker Documentation

解决docker-compose: command not found问题的两种常用方法-云社区-华为云

实战 WordPress - Docker — 从入门到实践

Getting the final child"s pid from pipe caused: EOF: unknown

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