使用Docker创建两个容器的应用(微服务)

作者:xinwang_m@163.com
发布时间: 2020-07-21 02:49:04 (4年前)
关键词: 使用Docker
摘要:

                              
                                     本教程展示如何使用两个Docker容器分别装载WordPress博客系统和MySQL数据库，Wordpress是来自于Tutum维护的可信容器。

本教程展示如何使用两个Docker容器分别装载WordPress博客系统和MySQL数据库，Wordpress是来自于Tutum维护的可信容器。Docker的安装：直接下载<a href="https://github.com/boot2docker/boot2docker" title="boot2docker">boot2docker</a>。首先，运行：$ docker run -d -p 80 tutum/wordpress /run.sh这将会下载wordpress的img，通过命令：$ docker ps会查询当前运行的Image中有tutum/wordpress:latest 。这是WordPress 和 MySQL在一个容器中运行。现在我们有了一个Image，下面看看如何修改它，让MySQL存在在另外一个Docker容器中，以交互式运行wordpress:$ docker run -i -t tutum/wordpress bash查看run.sh脚本：<a href="mailto:root@dfa24049c264:/#">root@dfa24049c264:/#</a> cat run.sh<h1>!/bin/bash</h1>if [ ! -f /.mysql_admin_created ]; then /create_mysql_admin_user.sh fi exec supervisord -n现在我们不希望在这个容器中运行MySQL，通过下面方式修改：<a href="mailto:root@dfa24049c264:/#">root@dfa24049c264:/#</a> rm /etc/supervisor/conf.d/supervisord-mysqld.conf <a href="mailto:root@dfa24049c264:/#">root@dfa24049c264:/#</a> touch /.mysql_admin_created在另外Docker窗口，运行docker ps会发现你的交互方式容器的ID;比如dfa24049c264这样我们可以确认commit给文件系统我们刚才修改：$ docker commit dfa24049c264 myuser/wordpress 852e9ccd1194f5abbcbfb13c61e54a31d5b716b20bec3d114437e824a39e168a现在我们已经有了我们自己的tutum的 WordPress，不过没有激活MySQL ，我们来运行它，停止其他容器，启动这个新的image容器： myuser/wordpress.$ docker stop dfa24049c264 $ docker stop 110631a70e76 $ docker run -d -p 80 myuser/wordpress /run.sh f1bc5c3bd28aac9a9452fdaeafb527b9616e5167797d56654dee625479c8d70c $ docker ps当docker ps时，3306端口并没有像之前出现，说明mySQL未启动。从Docker index获得我们自己的mySQL容器：$ docker run -d -p 3306 tutum/mysql /run.sh 63a974062480cdcb93db788dc2ef72cb1f5cbfe2c180b9fdfb1b13c62753c106 $ docker ps然后同样进入交互方式：$ docker run -i -t tutum/mysql bash <a href="mailto:root@a6fd073d27bb:/#">root@a6fd073d27bb:/#</a> cat run.sh<h1>!/bin/bash</h1>if [ ! -f /.mysql_admin_created ]; then /create_mysql_admin_user.sh fi exec supervisord -n这里我们不需要任何改变，而是要获得数据库root用户名和密码，退出Docker会看到用户名和密码：docker run -d -p 3306 tutum/mysql /run.sh 63a974062480cdcb93db788dc2ef72cb1f5cbfe2c180b9fdfb1b13c62753c106运行docker ps找到mysql的容器id:63a974062480$ docker logs 63a974062480 => Creating MySQL admin user with random password<h1>=> Done!</h1>You can now connect to this MySQL Server using:mysql -uadmin -pqa1N76pWAri9 -h -PPlease remember to change the above password as soon as possible!<h1>MySQL user ‘root’ has no password but only allows local connections</h1>2014-01-20 21:56:10,100 CRIT Supervisor running as root (no user in config file) 2014-01-20 21:56:10,111 WARN Included extra file “/etc/supervisor/conf.d/supervisord-mysqld.conf” during parsing 2014-01-20 21:56:10,330 INFO RPC interface ‘supervisor’ initialized 2014-01-20 21:56:10,330 WARN cElementTree not installed, using slower XML parser for XML-RPC 2014-01-20 21:56:10,330 CRIT Server ‘unix_http_server’ running without any HTTP authentication checking 2014-01-20 21:56:10,330 INFO supervisord started with pid 1 2014-01-20 21:56:11,333 INFO spawned: ‘mysqld’ with pid 385 2014-01-20 21:56:12,536 INFO success: mysqld entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)进入mysql管理界面创建wordpress数据库 $ mysql -uadmin -pqa1N76pWAri9 -h 0.0.0.0 -P 49165 -e ‘create database wordpress;’确认 $ docker commit 63a974062480 myuser/mysql c1c5e63d427cc533325e3870ab9ed439e8bfe2e95c333ec54657210708816bbd现在我们可以停止之前的通用mysql 的Docker，运行我们自己的mysql的Docker:$ docker stop 63a974062480 $ docker run -d -p 3306 myuser/mysql /run.sh最后一步，绑定wordpress和mysql两个容器$ docker run -i -t myuser/wordpress bash <a href="mailto:root@f74cc171d7d5:/#">root@f74cc171d7d5:/#</a> apt-get install curl <a href="mailto:root@f74cc171d7d5:/#">root@f74cc171d7d5:/#</a> curl -L <a href="https://gist.github.com/cardmagic/8530589/raw/21c5d2f0a4f661531502a705a797e0357d998c86/gistfile1.txt">https://gist.github.com/cardmagic/8530589/raw/21c5d2f0a4f661531502a705a797e0357d998c86/gistfile1.txt</a> > /app/wp-config.php开启另外一个Docker窗口，运行：$ docker commit f74cc171d7d5 myuser/wordpress $ docker stop f74cc171d7d5最后，将两者连接一起：$ export DB_PASSWORD=qa1N76pWAri9 $ docker run -e=“DB_PASSWORD=$DB_PASSWORD” -link angry_bardeen:db -d -p 80 myuser/wordpress /run.sh $ docker ps出现： CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 2fb827d3c3a7 myuser/wordpress:latest /run.sh 2 seconds ago Up 1 seconds 0.0.0.0:49167->80/tcp ecstatic_thompson 5a840e255282 myuser/mysql:latest /run.sh 22 minutes ago Up 22 minutes 0.0.0.0:49166->3306/tcp angry_bardeen,ecstatic_thompson/db 通过浏览器或$ curl <a href="http://0.0.0.0:49167/wp-admin/install.php访问确认。,本教程展示如何使用两个Docker容器分别装载WordPress博客系统和MySQL数据库，Wordpress是来自于Tutum维护的可信容器。Docker的安装：直接下载[boot2docker](https://github.com/boot2docker/boot2docker">http://0.0.0.0:49167/wp-admin/install.php访问确认。,本教程展示如何使用两个Docker容器分别装载WordPress博客系统和MySQL数据库，Wordpress是来自于Tutum维护的可信容器。Docker的安装：直接下载[boot2docker](https://github.com/boot2docker/boot2docker</a> “boot2docker”)。首先，运行：$ docker run -d -p 80 tutum/wordpress /run.sh这将会下载wordpress的img，通过命令：$ docker ps会查询当前运行的Image中有tutum/wordpress:latest 。这是WordPress 和 MySQL在一个容器中运行。现在我们有了一个Image，下面看看如何修改它，让MySQL存在在另外一个Docker容器中，以交互式运行wordpress:$ docker run -i -t tutum/wordpress bash查看run.sh脚本：<a href="mailto:root@dfa24049c264:/#">root@dfa24049c264:/#</a> cat run.sh<h1>!/bin/bash</h1>if [ ! -f /.mysql_admin_created ]; then /create_mysql_admin_user.sh fi exec supervisord -n现在我们不希望在这个容器中运行MySQL，通过下面方式修改：<a href="mailto:root@dfa24049c264:/#">root@dfa24049c264:/#</a> rm /etc/supervisor/conf.d/supervisord-mysqld.conf <a href="mailto:root@dfa24049c264:/#">root@dfa24049c264:/#</a> touch /.mysql_admin_created在另外Docker窗口，运行docker ps会发现你的交互方式容器的ID;比如dfa24049c264这样我们可以确认commit给文件系统我们刚才修改：$ docker commit dfa24049c264 myuser/wordpress 852e9ccd1194f5abbcbfb13c61e54a31d5b716b20bec3d114437e824a39e168a现在我们已经有了我们自己的tutum的 WordPress，不过没有激活MySQL ，我们来运行它，停止其他容器，启动这个新的image容器： myuser/wordpress.$ docker stop dfa24049c264 $ docker stop 110631a70e76 $ docker run -d -p 80 myuser/wordpress /run.sh f1bc5c3bd28aac9a9452fdaeafb527b9616e5167797d56654dee625479c8d70c $ docker ps当docker ps时，3306端口并没有像之前出现，说明mySQL未启动。从Docker index获得我们自己的mySQL容器：$ docker run -d -p 3306 tutum/mysql /run.sh 63a974062480cdcb93db788dc2ef72cb1f5cbfe2c180b9fdfb1b13c62753c106 $ docker ps然后同样进入交互方式：$ docker run -i -t tutum/mysql bash <a href="mailto:root@a6fd073d27bb:/#">root@a6fd073d27bb:/#</a> cat run.sh<h1>!/bin/bash</h1>if [ ! -f /.mysql_admin_created ]; then /create_mysql_admin_user.sh fi exec supervisord -n这里我们不需要任何改变，而是要获得数据库root用户名和密码，退出Docker会看到用户名和密码：docker run -d -p 3306 tutum/mysql /run.sh 63a974062480cdcb93db788dc2ef72cb1f5cbfe2c180b9fdfb1b13c62753c106运行docker ps找到mysql的容器id:63a974062480$ docker logs 63a974062480 => Creating MySQL admin user with random password<h1>=> Done!</h1>You can now connect to this MySQL Server using:mysql -uadmin -pqa1N76pWAri9 -h -PPlease remember to change the above password as soon as possible!<h1>MySQL user ‘root’ has no password but only allows local connections</h1>2014-01-20 21:56:10,100 CRIT Supervisor running as root (no user in config file) 2014-01-20 21:56:10,111 WARN Included extra file “/etc/supervisor/conf.d/supervisord-mysqld.conf” during parsing 2014-01-20 21:56:10,330 INFO RPC interface ‘supervisor’ initialized 2014-01-20 21:56:10,330 WARN cElementTree not installed, using slower XML parser for XML-RPC 2014-01-20 21:56:10,330 CRIT Server ‘unix_http_server’ running without any HTTP authentication checking 2014-01-20 21:56:10,330 INFO supervisord started with pid 1 2014-01-20 21:56:11,333 INFO spawned: ‘mysqld’ with pid 385 2014-01-20 21:56:12,536 INFO success: mysqld entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)进入mysql管理界面创建wordpress数据库 $ mysql -uadmin -pqa1N76pWAri9 -h 0.0.0.0 -P 49165 -e ‘create database wordpress;’确认 $ docker commit 63a974062480 myuser/mysql c1c5e63d427cc533325e3870ab9ed439e8bfe2e95c333ec54657210708816bbd现在我们可以停止之前的通用mysql 的Docker，运行我们自己的mysql的Docker:$ docker stop 63a974062480 $ docker run -d -p 3306 myuser/mysql /run.sh最后一步，绑定wordpress和mysql两个容器$ docker run -i -t myuser/wordpress bash <a href="mailto:root@f74cc171d7d5:/#">root@f74cc171d7d5:/#</a> apt-get install curl <a href="mailto:root@f74cc171d7d5:/#">root@f74cc171d7d5:/#</a> curl -L <a href="https://gist.github.com/cardmagic/8530589/raw/21c5d2f0a4f661531502a705a797e0357d998c86/gistfile1.txt">https://gist.github.com/cardmagic/8530589/raw/21c5d2f0a4f661531502a705a797e0357d998c86/gistfile1.txt</a> > /app/wp-config.php开启另外一个Docker窗口，运行：$ docker commit f74cc171d7d5 myuser/wordpress $ docker stop f74cc171d7d5最后，将两者连接一起：$ export DB_PASSWORD=qa1N76pWAri9 $ docker run -e=“DB_PASSWORD=$DB_PASSWORD” -link angry_bardeen:db -d -p 80 myuser/wordpress /run.sh $ docker ps出现： CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 2fb827d3c3a7 myuser/wordpress:latest /run.sh 2 seconds ago Up 1 seconds 0.0.0.0:49167->80/tcp ecstatic_thompson 5a840e255282 myuser/mysql:latest /run.sh 22 minutes ago Up 22 minutes 0.0.0.0:49166->3306/tcp angry_bardeen,ecstatic_thompson/db 通过浏览器或$ curl <a href="http://0.0.0.0:49167/wp-admin/install.php访问确认。">http://0.0.0.0:49167/wp-admin/install.php访问确认。</a>

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