第三次实践作业
1.完成docker-compose的安装
下载docker-compose稳定版本
sudo curl -L "https://github.com/docker/compose/releases/download/1.25.5/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
将可执行权限应用于二进制文件
sudo chmod +x /usr/local/bin/docker-compose
创建软链
sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
测试安装
docker-compose --version
2.dockerfile编写
创建目录
dockerfile_nginx
FROM nginx
MAINTAINER lin
EXPOSE 1998
dockerfile_mysql
FROM mysql
MAINTAINER lin
#设置root密码
ENV MYSQL_ROOT_PASSWORD 123456
#设置不可免密登录
ENV MYSQL_ALLOW_EMPTY_PASSWORD no
dockerfile_php
FROM php:7.4-fpm
MAINTAINER lin
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$(nproc) gd
index.html
hello man!
index.php
<?php phpinfo();?>
default.conf
server {
listen 1998; #修改映射端口
server_name localhost;
location / {
root /web/html; #修改工作目录
index index.html index.htm;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
location ~ \.php$ {
root /web/php; #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;
}
}
docker-compose.yml
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:
- "80:1998" #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 #配置文件
php:
image: myphp_image
container_name: myphp
build:
context: .
dockerfile: dockerfile_php
environment:
MYSQL_PASSWORD: 123456
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:/var/lib/mysql
3.使用Compose实现多容器运行机制
运行docker-compose
sudo docker-compose up -d --build
查看镜像
查看容器
访问
4.服务测试
连接测试
<?php
$servername = "mysql";
$username = "root";
$password = "123456";
try {
$conn = new PDO("mysql:host=$servername", $username, $password);
echo "连接成功";
}
catch(PDOException $e)
{
echo $e->getMessage();
}
创建数据库
<?php
$servername = "mysql";
$username = "root";
$password = "123456";
try {
$conn = new PDO("mysql:host=$servername", $username, $password);
// 设置 PDO 错误模式为异常
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = "CREATE DATABASE lin_test";
// 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;
?>
sudo docker exec -it mysql /bin/bash
mysql -u root -p
show databases;
创建一个数据表
<?php
$servername = "mysql";
$username = "root";
$password = "123456";
$dbname="lin_test";
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// 设置 PDO 错误模式，用于抛出异常
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// 使用 sql 创建数据表
$sql = "CREATE TABLE user (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP
)";
// 使用 exec() ，没有结果返回
$conn->exec($sql);
echo "数据表 user 创建成功";
}
catch(PDOException $e)
{
echo $sql . "<br>" . $e->getMessage();
}
$conn = null;
?>
select * from user;
删除数据
<?php
$servername = "mysql";
$username = "root";
$password = "123456";
$dbname="lin_test";
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// 开始事务
$conn->beginTransaction();
// SQL 语句
$conn->exec("DELETE FROM user where lastname='Lin'");
// 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;
?>
select * from user;
主要遇到的问题
最近几次作业把我磁盘空间弄满了 ，删了半天 ，还有就是对docker的运行机制了解还是不够深入，只是参考了部分资料，资料看得不够多，实验过程中也是经常问zqy。。。还得继续学习更多
