摘要：操作系統阿里云實例軟件一創建帶有擴展的創建文件在文件寫入創建自定義的鏡像，主要不要漏了最后的，是指定當前目錄構建鏡像運行指令，由于網絡問題等，需要等比較長

操作系統：阿里云esc實例centos7.4
軟件：docker-ce version 18.09.3, docker-compose version 1.23.2

一.創建帶有swoole-redis-pdo_mysql-gd擴展的docker image

1.創建dockerfile文件

vim dockerfile

2.在dockerfile文件寫入

From php:7.1-fpm
RUN apt-get update && apt-get install -y 
    libfreetype6-dev 
    libjpeg62-turbo-dev 
    libpng-dev 
&& docker-php-ext-install -j$(nproc) iconv 
&& docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ 
&& docker-php-ext-install -j$(nproc) gd 
&& docker-php-ext-configure pdo_mysql 
&& docker-php-ext-install pdo_mysql 
&& pecl install redis-4.3.0 
&& pecl install swoole 
&& docker-php-ext-enable redis swoole

3.創建自定義的php鏡像，主要不要漏了最后的 "."，是指定當前目錄構建鏡像

docker build -t myphp4 .

運行指令，由于網絡問題等，需要等比較長的時間，成功后會出現類似下面的代碼

...
Build process completed successfully
Installing "/usr/local/include/php/ext/swoole/config.h"
Installing "/usr/local/lib/php/extensions/no-debug-non-zts-20160303/swoole.so"
install ok: channel://pecl.php.net/swoole-4.3.1
configuration option "php_ini" is not set to php.ini location
You should add "extension=swoole.so" to php.ini
Removing intermediate container ad1420f7554f
 ---> 2f2f332d73ce
Successfully built 2f2f332d73ce
Successfully tagged myphp4:latest

至此docker 的自定義myphp4 image創建成功！

二.創建docker-compose.yml文件

mkdir pnsmr
cd pnsmr
vim docker-compose.yml

寫入下面代碼

version: "3.0"
services:
nginx:
    image: "nginx:latest"
    ports:
     - "9998:80"
    volumes:
     - /var/www/html:/usr/share/nginx/html
php-fpm:
    image: "myphp4"
    volumes:
    - /var/www/html:/usr/share/nginx/html
mysql:
    image: "mysql:latest"
    environment:
    - MYSQL_ROOT_PASSWORD=123456
    - MYSQL_DATABASE=test

redis:
    image: "redis:4.0"

運行指令

docker-compose up -d

成功可以看到

WARNING: The Docker Engine you"re using is running in swarm mode.

Compose does not use swarm mode to deploy services to multiple nodes in a swarm. All containers will be scheduled on the current node.

To deploy your application across the swarm, use `docker stack deploy`.

Creating network "pnsmr_default" with the default driver
Creating pnsmr_php-fpm_1 ... done
Creating pnsmr_redis_1   ... done
Creating pnsmr_mysql_1   ... done
Creating pnsmr_nginx_1   ... done

至此，已開啟nginx mysql redis php 服務

三.修改各服務配置文件
1.瀏覽器輸入 127.0.0.1:9998 #此處應輸入你的服務器ip地址，可以看到下圖

2.接下來要修改容器里nginx的配置文件，先使用指令查看各容器的docker IP地址

docker inspect -f "{{.Name}} - {{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}" $(docker ps -aq)
此指令可以查看所有用docker-compose 開啟的容器的ip，結果類似下圖，可以用對應的ip地址進行內部通訊

3.復制nginx容器的配置文件出來，并修改替換,使nginx能解析php

docker cp pnsmr_nginx_1:/etc/nginx/conf.d/default.conf nginx.conf
vim nginx.conf

修改為下列代碼

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.html index.htm;
    }

    #error_page  404              /404.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
    #
    location ~ .php$ {
        root           html;
        fastcgi_pass   172.24.0.3:9000;#此處需要填寫你的php容器的docker內部通訊ip
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  /usr/share/nginx/html/$fastcgi_script_name;
        include        fastcgi_params;
    }

    # deny access to .htaccess files, if Apache"s document root
    # concurs with nginx"s one
    #
    #location ~ /.ht {
    #    deny  all;
    #}
}

修改成功后，再執行下列指令

docker cp nginx.conf pnsmr_nginx_1:/etc/nginx/conf.d/default.conf #將修改好的配置文件拷貝到容器里
docker container stop pnsmr_nginx_1 
docker container start pnsmr_nginx_1 #重啟nginx容器使配置文件生效
vim /var/www/html/index.php #在服務器本地目錄新建 index.php 文件，輸入
訪問127.0.0.1:9998, html文件解析正常

   訪問127.0.0.1:9998/index.php，php文件解析正常

   4.測試mysql，redis是否生效

vim /var/www/html/redis.php #用于測試redis是否配置成功
connect("172.24.0.4",6379);
$redis->set("test","this is a test for redis");
echo $redis->get("test");
訪問127.0.0.1:9998/redis.php，redis已生效

進入mysql容器
docker exec -it pnsmr_mysql_1 bash
進入mysql并更改root用戶密碼

創建測試文件
vim /var/www/html/mysql.php

訪問127.0.0.1：9998/mysql.php，mysql已生效

四.總結
   雖然環境是配置成功了，并可以用docker-compose up 指令一鍵生成，但是還要改各容器的配置文件，仍然不夠方便，需要優化；另外docker的集群，堆棧功能也沒用上，后面再繼續學習.