系统结构实践第三次作业

1.完成Docker-compose的安装

由于是Mac os，安装docker时已经捆绑安装了docker-compose,用docker --version即可查看版本

2.dockerfile以及配置文件等

2.1基础文件建立

brew install tree

先安装好tree以后新建文件夹以及dockerfile等文件

mkdir docker-compose
touch docekr-compose.yml
touch dockerfile_mysql
touch dockerfile_php
touch dockerfile_nginx
mkdir web
mkdir mysql_data
touch default.conf

2.2编写文件内容

docker-compose.yml

version: "3"
services:
 nginx:
    image: mynginx_image               
    container_name: mynginx             
    build:
      context: .
      dockerfile: dockerfile_nginx      #指定dockerfile文件
    ports:
      - "80:2020"                       
    volumes:
      - ./web:/web/html                
      - ./default.conf:/etc/nginx/conf.d/default.conf     

 php:
    image: myphp_image 
    container_name: myphp 
    build:
      context: .
      dockerfile: dockerfile_php 
    environment:
      MYSQL_PASSWORD: 123            
    volumes:
      - ./web:/web/php                  

 mysql:
   image: mysql_image 
   container_name: mysql
   build:
      context: .
      dockerfile: dockerfile_mysql
   ports:
     - "3306:3306"
   volumes:
     - ./mysql_data:/var/lib/mysql       

docekrfile_nginx

FROM nginx

EXPOSE 2020

dockerfile_mysql

FROM mysql

ENV MYSQL_ROOT_PASSWORD 123

ENV MYSQL_ALLOW_EMPTY_PASSWORD no

dockerfile_php

FROM php:7.4-fpm
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

default.conf

server {
    listen       2020;        
    server_name  localhost;

    location / {
        root   /web/html;     
        index  index.html index.htm;
    }

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    location ~ \.php$ {
        root           /web/php;          
        fastcgi_pass   myphp:9000;        
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name; 
        include        fastcgi_params;
    }
}

3.使用Compose实现多容器运行机制

docker-compose up -d

之前出现error是因为mysql的3306端口被占用，原因是本机打开了sqlserver服务，从本机设置里关闭sqlserver即可

4.修改php

<?php
$servername = "mysql_container";
$username = "root";
$password = "123456";
  
try {
    $conn = new PDO("mysql:host=$servername;", $username, $password);
    echo "连接成功";
}
catch(PDOException $e)
{
    echo $e->getMessage();
}
?>

5.数据库相关操作

<?php
$servername = "mysql";
$username = "root";
$password = "123";
 
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 myDB";
    $conn->exec($sql);

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

建表

<?php
$servername = "mysql";
$username = "root";
$password = "123";
$dbname="myDB";        
 
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 user(
    id INT(8) UNSIGNED PRIMARY KEY, 
    name VARCHAR(30) NOT NULL
)";
    
    $conn->exec($sql);
    echo "数据表 user 创建成功";
}
catch(PDOException $e)
{
    echo $sql . "<br>" . $e->getMessage();
}
 
$conn = null;
?>

向表中插入数据

<?php
$servername = "mysql";
$username = "root";
$password = "123";
$dbname="myDB";
 
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 user (id,name) 
    VALUES (031702145, 'mlz',)");
    $conn->exec("INSERT INTO user (id,name) 
    VALUES (031702140, 'pwz',)");
 
    // 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;
?>

6.小节

因为用的Mac os，很多东西感觉都和linux不一样，自己也在重新再linux上面复现，这次的实验感觉花时间的地方主要是在找不同，去适应mac下面的东西，网上的资源也比较少，很多错误也没办法及时的找到问题根源