第三次系统综合实践

完成Docker-compose的安装

dockerfile的编写

编写deault.conf配置文件

server {
    listen       1106;        #修改映射端口
    server_name  localhost;

    location / {
        root   /web/html;     #修改工作目录
        index  index.html index.html;
    }
    
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }
    
    location ~ .php$ {
        root           /web/php;          #修改工作目录
        fastcgi_pass   myphp:9000;        #修改为容器名
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name; 
        include        fastcgi_params;
    }

}

nginx

FROM nginx
MAINTAINER lx
EXPOSE 1106

php

FROM php:7.4-fpm
MAINTAINER lx
FROM php:7.4-fpm
RUN apt-get update && apt-get install -y 
        libfreetype6-dev 
        libjpeg62-turbo-dev 
        libpng-dev 
    && docker-php-ext-install pdo_mysql 
    && docker-php-ext-configure gd --with-freetype --with-jpeg 
    && docker-php-ext-install -j$(nproc) gd

mysql

FROM mysql
MAINTAINER lx
ENV MYSQL_ROOT_PASSWORD 123456
ENV MYSQL_ALLOW_EMPTY_PASSWORD no

phpmyadmin

FROM phpmyadmin/phpmyadmin            
MAINTAINER lx

EXPOSE 8080

docker-compose的编写

version: "3"
services:
 nginx:
    image: mynginx_image                #指定镜像名
    container_name: mynginx             #指定容器名
    build:
      context: .
      dockerfile: dockerfile_nginx      #指定dockerfile文件
    ports:
      - "80:1106"                       #修改端口映射
    volumes:
      - ./web:/web/html                 #挂载容器卷，本地/容器内修改文件后，另一方都会同步更新；
      - ./default.conf:/etc/nginx/conf.d/default.conf     #挂载配置文件

 php:
    image: myphp_image 
    container_name: myphp 
    build:
      context: .
      dockerfile: dockerfile_php 
    environment:
      MYSQL_PASSWORD: 123456            #设置好环境变量，在php代码中使用变量名直接引用
    volumes:
      - ./web:/web/php                  #挂载工作目录到本机web目录

 mysql:
   image: mysql_image 
   container_name: mysql
   build:
      context: .
      dockerfile: dockerfile_mysql
   ports:
     - "3306:3306"
   volumes:
     - ./mysql_data:/var/lib/mysql       #挂载容器卷，实现数据同步，防止数据丢失

 phpmyadmin:
    image: myphpmyadmin_image
    container_name: myphpmyadmin
    build: 
      context: .
      dockerfile: dockerfile_phpmyadmin
    ports: 
      - "8080:80" # phpmyadmin默认监听80
    environment:
      PMA_HOST: mysql                     #指定mysql服务所在的host

执行docker-compose文件

sudo docker-compose up -d --build

服务测试

测试php能不能连接mysql数据库

<?php
$servername = "mysql";    #注意这里要用自己自定义的Mysql的容器名
$username = "root";
$password = "123456";     #密码也可以直接使用yml中的变量名
 
try {
    $conn = new PDO("mysql:host=$servername", $username, $password);
    echo "连接成功"; 
}
catch(PDOException $e)
{
    echo $e->getMessage();
}

在index.php文件中创建数据库
<?php
$servername = "mysql";
$username = "root";
$password = "123456";

try {
    $conn = new PDO("mysql:host=$servername", $username, $password);
    echo "连接成功"; 

    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $sql = "CREATE DATABASE myDBPDO";

    // 使用 exec() ，因为没有结果返回
    $conn->exec($sql);

    echo "数据库创建成功<br>";
}
catch(PDOException $e)
{
    echo $sql . "<br>" . $e->getMessage();
}
$conn = null;
?>

在myDBPDO数据库中创建Student表

<?php
$servername = "mysql";
$username = "root";
$password = "123456";
$dbname="dockerComposeDB";       
 
try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);    #选择数据库
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    // 使用 sql 创建数据表
    $sql = "CREATE TABLE student(
        id int(4) not null primary key,
        name varchar(16) not null
    )";
    // 使用 exec() ，没有结果返回 
    $conn->exec($sql);
    echo "数据表 student 创建成功";
}
catch(PDOException $e)
{
    echo $sql . "<br>" . $e->getMessage();
}
 
$conn = null;
?>

向student表中插入数据

<?php
$servername = "mysql";
$username = "root";
$password = "123456";
$dbname="myDBPDO";
 
try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    // 开始事务
    $conn->beginTransaction();
    // SQL 语句
    $conn->exec("INSERT INTO Student (id,name) 
    VALUES (123456789, 'lx')");
    $conn->exec("INSERT INTO Student (id,name) 
    VALUES (123456780, 'll')");
    $conn->exec("INSERT INTO Student (id,name) 
    VALUES (123456879, 'xx')");
 
    // 提交事务
    $conn->commit();
    echo "新记录插入成功";
}
catch(PDOException $e)
{
    // 如果执行失败回滚
    $conn->rollback();
    echo $sql . "<br>" . $e->getMessage();
}
 
$conn = null;
?>

修改数据

<?php
$servername = "mysql";
$username = "root";
$password = "123456";
$dbname="myDBPDO";
 
try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    // 开始事务
    $conn->beginTransaction();
    // SQL UPDATE 语句
    $conn->exec("UPDATE Student SET name='llx' WHERE id=123456789");
    // 提交事务
    $conn->commit();
    echo "修改成功";
}
catch(PDOException $e)
{
    // 如果执行失败回滚
    $conn->rollback();
    echo $sql . "<br>" . $e->getMessage();
}
 
$conn = null;
?>

删除数据

<?php
$servername = "mysql";
$username = "root";
$password = "123456";
$dbname="myDBPDO";
 
try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    // 开始事务
    $conn->beginTransaction();
	//SQL  DELETE语句
    $conn->exec("DELETE FROM Student where id=123456789");
    // 提交事务
    $conn->commit();
    echo "删除成功";
}
catch(PDOException $e)
{
    // 如果执行失败回滚
    $conn->rollback();
    echo $sql . "<br>" . $e->getMessage();
}
 
$conn = null;
?>

遇到的问题

1、
将docker-compose重新编写后解决

2、
这个实在没搞懂，干脆把nginx那块给重新搞了一下