安裝Docker Compose之前應先確保系統已經安裝了Docker

安裝Docker Compose

1.下載Docker Compose

    sudo curl -L "https://github.com/docker/compose/releases/download/1.22.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

2.新增可執行許可權

    sudo chmod +x /usr/local/bin/docker-compose

3.測試

    $ docker-compose --version
    docker-compose version 1.22.0, build 1719ceb
 

搭建nginx+php+mysql

系統環境

CentOS minimal 7.2.1511
Docker CE 18.06.1-ce

docker映象版本：
php 7.2.11-fpm
mysql 8.0
nginx 1.15

構建目錄結構

www
├── docker-compose.yml
├── html
│   └── index.php
├── mysql
├── nginx
│   └── default.conf
└── php
    └── Dockerfile

docker-compose.yml

version: ‘3.7’
services:
  nginx:
    image: nginx
    ports:
      - "80:80"
    depends_on:
      - php
    volumes:
      - "$PWD/nginx/default.conf:/etc/nginx/conf.d/default.conf"
      - "$PWD/html:/usr/share/nginx/html"
    networks:
      - app_net
    container_name: "compose-nginx"
  php:
    build: ./php
    image: php:fpm
    ports:
      - "9000:9000"
    volumes:
      - "$PWD/html:/var/www/html"
    networks:
      - app_net
    container_name: "compose-php"
  mysql:
    image: mysql
    ports:
      - "3306:3306"
    environment:
      - MYSQL_ROOT_PASSWORD=123456
    networks:
      app_net:
        ipv4_address: 10.10.10.1
    container_name: "compose-mysql"
networks:
  app_net:
    driver: bridge
    ipam:
      config:
        - subnet: 10.10.0.0/16
 

html/index.php

<?php
phpinfo();

nginx/default.conf

server {
    listen       80;
    server_name  localhost;
      
    #charset koi8-r;
    #access_log  /var/log/nginx/host.access.log  main;
        
    location / {
        root   /usr/share/nginx/html;
        index  index.php index.html index.htm;
    }
    
    error_page  404              /404.html;
    location = /40x.html {
        root   /usr/share/nginx/html;
    }
     
    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }
 
    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}
 
    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    # PHP 指令碼請求全部轉發到 FastCGI處理. 使用FastCGI協議預設配置.
    # Fastcgi伺服器和程式(PHP,Python)溝通的協議.
    location ~ \.php$ {
        # php容器的網站根目錄
        root           /var/www/html/;
        # 設定監聽埠
        fastcgi_pass   php:9000;
        fastcgi_index  index.php;
        # 設定指令碼檔案請求的路徑
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        # 引入fastcgi的配置檔案
        include        fastcgi_params;
    }
  
    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    location ~ /\.ht {
        deny  all;
    }
}
 

因為nginx映象裡沒有fastcgi.conf檔案，就需要引入fastcgi_params檔案並配置SCRIPT_FILENAME引數

php/Dockerfile

FROM php:fpm
              
RUN apt-get update \
    && apt-get install -y iputils-ping \
    && docker-php-ext-install mysqli && docker-php-ext-enable mysqli

啟動服務

# www目錄下執行
docker-compose up -d

測試

瀏覽器訪問http://localhost，會出現php的介紹文件

如果在虛擬機器裡搭建的專案，localhost要改成虛擬機器的IP地址

遇到的問題

在docker-compose.yml檔案所在目錄執行

$ docker-compose up -d

報錯：

ERROR: Couldn't connect to Docker daemon at http+docker://localhost - is it running?
If it's at a non-standard location, specify the URL with the DOCKER_HOST environment variable.

解決方法是把當前使用者新增到docker使用者組，然後重新登入即可

sudo usermod -aG docker ${USER}

參考網址

• https://docs.docker.com/compose/install/
• https://docs.docker.com/install/linux/docker-ce/centos/#os-requirements