今天老高动手实践一下分离nginx和php，还有mysql。即三个image: g-nginx,g-php,g-mysql。
准备工作
镜像文件
- docker_hub - nginx
- docker_hub - php
- docker_hub - mariadb
- docker_hub - mysql
docker pull nginx
docker pull php:7-fpm
docker pull mysql
或者用Daocloud加速
dao pull nginx
dao pull php:7-fpm一些文件
/tmp/host.conf，他就是虚拟主机的配置文件
代码语言：javascript复制server {
listen 80;
server_name localhost;
#charset koi8-r;
#access_log /var/log/nginx/log/host.access.log main;
location / {
root /usr/share/nginx/html;
index index.php 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 /usr/share/nginx/html;
fastcgi_pass php-fpm:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$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;
#}
}/tmp/html/index.php，他是web根目录的文件。
代码语言：javascript复制<?php
phpinfo();/tmp/html/index.php，他是测试mysql的文件。
代码语言：javascript复制<?php
$hasMySQL = false;
$hasMySQLi = false;
$withMySQLnd = false;
$sentence = '';
if (function_exists('mysql_connect')) {
$hasMySQL = true;
$sentence.= "(Deprecated) MySQL is installed ";
} else
$sentence.= "(Deprecated) MySQL is not installed ";
if (function_exists('mysqli_connect')) {
$hasMySQLi = true;
$sentence.= "and the new (improved) MySQL is installed . ";
} else
$sentence.= "and the new (improved) MySQL is not installed . ";
$sentence.="rn";
if (function_exists('mysqli_fetch_all')) {
$withMySQLnd = true;
$sentence.= "This server is using MySQLnd as the driver.";
} else
$sentence.= "This server is using libmysqlclient as the driver.";
$sentence.="rn";
echo $sentence;
$pdo = new PDO('mysql:host=mysql;dbname=mysql', 'root', '123456');
if (strpos($pdo->getAttribute(PDO::ATTR_CLIENT_VERSION), 'mysqlnd') !== false) {
echo 'PDO MySQLnd enabled!';
}
?>配置PHP
默认PHP的镜像是不启用mysql等功能的，需要手动启用，所以我们使用Dockerfile创建一个新的PHP镜像
代码语言：javascript复制FROM php:7-fpm
MAINTAINER LAOGAO <endoffight#gmail.com>
RUN cp /usr/src/php/php.ini-production /usr/local/etc/php/php.ini
RUN docker-php-ext-install pdo_mysql mysqli
# RUN sed 's/^;extension=php_pdo_mysql.dll/extension=pdo_mysql.so/' -i /usr/local/etc/php/php.ini
# RUN sed 's/^;extension=php_mysqli.dll/extension=mysqli.so/' -i /usr/local/etc/php/php.ini将上线的内容保存到文件Dockerfile，然后执行docker build -t php:laogao .即可完成镜像构建！
docker命令
docker的命令中有一个link选项，可以直接让两个容器联通，并制定一个host，用于容器内的网络连接，所以以上的配置中我们将原本nginx的conf中的127.0.0.1:9000替换为php-fpm:9000，php-fpm就是设定的主机名。
--volumes-from意思是将某个容器的挂载同步，其实就是少打几个-v而已！
mysql与php是强链接，php和nginx是强链接，于是我们可以先运行mysql，然后运行php与mysql联通，最后把nginx与php联通！
代码语言：javascript复制docker run -d --name g-mysql -e MYSQL_ROOT_PASSWORD=123456 mysql:latest
docker run --link=g-mysql:mysql -v /tmp/html:/usr/share/nginx/html -d --name g-php php:laogao
docker run -d -v /tmp/host.conf:/etc/nginx/conf.d/default.conf --volumes-from=g-php --link=g-php:php-fpm -p 80:80 --name=g-nginx nginx访问mysql.php文件，得到下面的图片：
Reference:
phpinfo says MySQLnd is the active driver or am i confused
