使用docker部署nginx+tomcat架构(2)：访问mysql数据库

怼烎@ 2023-06-01 11:16 1阅读 0赞

[上一篇][Link 1]完成了通过docker部署nginx+tomcat的基础软件架构，但是距离一个真正可用的软件架构还差得很远。其中最重要的一点是缺少数据库这个角色的存在，那么本篇就来完善这一点。

废话少说，直接进入正题。

首先拉取mysql镜像：

docker pull mysql:5.7

创建本地mysql目录：

mkdir -p ~/mysql/data ~/mysql/conf ~/mysql/logs
    chmod -R 777 ~/mysql/logs

在mysql/conf目录下创建配置文件my.cnf：

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# For advice on how to change settings please see
    # http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
    
    [mysqld]
    #
    # Remove leading # and set to the amount of RAM for the most important data
    # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
    # innodb_buffer_pool_size = 128M
    #
    # Remove leading # to turn on a very important data integrity option: logging
    # changes to the binary log between backups.
    # log_bin
    #
    # Remove leading # to set options mainly useful for reporting servers.
    # The server defaults are faster for transactions and fast SELECTs.
    # Adjust sizes as needed, experiment to find the optimal values.
    # join_buffer_size = 128M
    # sort_buffer_size = 2M
    # read_rnd_buffer_size = 2M
    datadir=/var/lib/mysql
    socket=/var/lib/mysql/mysql.sock
    
    # Disabling symbolic-links is recommended to prevent assorted security risks
    symbolic-links=0
    
    log-error=/var/log/mysql/error.log
    pid-file=/var/run/mysqld/mysqld.pid
    
    # disabling the password validation
    #validate_password=off
    
    # set bind-address
    #bind-address=0.0.0.0

启动mysql：

docker run -d -p 3306:3306 --name mysql -e MYSQL_ROOT_PASSWORD=admin -v ~/mysql/conf:/etc/mysql/conf.d -v ~/mysql/data:/var/lib/mysql -v ~/mysql/logs:/var/log/mysql mysql:5.7

![644402-20190819214845902-1462228502.png][]

登录mysql测试下（root密码已经已经设置成了admin）：

mysql -uroot -p -h 172.17.0.2

![644402-20190819211040956-205834333.png][]

看上去没什么问题?

创建tomcat的jndi数据源tomcat/conf/context.xml：

<?xml version="1.0" encoding="UTF-8"?>
    <Context>
        <Resource name="mysql/test" 
            auth="Container"
            type="javax.sql.DataSource" 
            driverClassName="com.mysql.jdbc.Driver"
            url="jdbc:mysql://172.17.0.2:3306/test" 
            username="root"
            password="admin" 
            maxActive="20" 
            maxIdle="10" 
            maxWait="10000" />
    </Context>

新建一个javaweb工程demo，并配置web.xml：

<resource-ref>
            <res-ref-name>mysql/test</res-ref-name>
            <res-type>javax.sql.DataSource</res-type>
            <res-auth>Container</res-auth>
        </resource-ref>

创建测试页面testdb.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%@ page import="java.sql.*" %>
    <%@ page import="javax.sql.*" %>
    <%@ page import="javax.naming.*" %>
    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="UTF-8">
    <title>connect to mysql/test</title>
    </head>
    <body>
    <%
        Context context = new InitialContext();
        DataSource dataSource = (DataSource) context.lookup("java:comp/env/mysql/test");
        Connection conn = dataSource.getConnection();
        out.println("Connection.isValid: " + conn.isValid(3));
        conn.close();
    %>
    </body>
    </html>

打包demo工程上传到tomcat/webapps下，重启tomcat测试下：

docker restart tomcat1
    docker restart tomcat2

测试下tomcat与mysql的连接是否成功：

![644402-20190819222215621-356741653.png][]

ok, it works!

转载于:https://www.cnblogs.com/lichmama/p/11380169.html

[Link 1]: https://www.cnblogs.com/lichmama/p/11366262.html
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