Docker技术入门与实战【2.1】

4.配置Weblogic首先修改Weblogic的一些环境变量root185546d00925:/opt/Middleware/user_projects/domains/base_domain# vi bin/setDomainEnv.sh使用用户名和密码启动一次Webogic之后会在/opt/Middleware/user_projects/domains/base_domain下面生成一个server的文件夹的AdminServer文件夹。创建security/boot.properties文件内容如下usernameweblogic passwordpassword这样再次启动Weblogic时就不需要输入密码了。通过console的输出可以看到Weblogic在容器内启动成功并监听到7001端口root185546d00925:/opt/Middleware/user_projects/domains/base_domain# ./startWebLogic.sh ..JAVA Memory arguments: -Xms256m -Xmx512m -XX:MaxPermSize256m .W LS Start ModeProduction #此处省去了一些启动过程 http://www.hzcourse.com/resource/readBook?path/openresources/teach_ebook/uncompressed/15029/OEBPS/Text/..http://www.hzcourse.com/resource/readBook?path/openresources/teach_ebook/uncomp Oct 28 2014 8:13:52 AM UTC Notice Server BEA-002613 Channel Default is now listening on 172.17.0.13:7001 for protocols iiop t3 ldap snmp http. Oct 28 2014 8:13:52 AM UTC Notice Server BEA-002613 Channel Default[2] is now listening on 127.0.0.1:7001 for protocols iiop t3 ldap snmp http. Oct 28 2014 8:13:52 AM UTC Warning Server BEA-002611 The hostname localhost maps to multiple IP addresses: 127.0.0.1 0:0:0:0:0:0:0:1. Oct 28 2014 8:13:52 AM UTC Notice Server BEA-002613 Channel Default[3] is now listening on 0:0:0:0:0:0:0:1:7001 for protocols iiop t3 ldap snmp http. Oct 28 2014 8:13:52 AM UTC Notice WebLogicServer BEA-000329 Started the WebLogic Server Administration Server AdminServer for domain base_domain running in production mode Oct 28 2014 8:13:52 AM UTC Notice WebLogicServer BEA-000365 Server state changed to RUNNING. Oct 28 2014 8:13:52 AM UTC Notice WebLogicServer BEA-000360 The server started in RUNNING mode. 5.Dockerfile 编写Dockerfile内容为 FROM weblogic_1 #设置继承自我们创建的weblogic_1镜像 MAINTAINER waitfish from dockerpool.com(dwj_zz163.com) #下面是一些创建者的基本信息 #设置环境变量 所有操作都是非交互式的 ENV DEBIAN_FRONTEND noninteractive RUN echo Asia/Shanghai /etc/timezone \ dpkg-reconfigure -f noninteractive tzdata #注意这里要更改系统的时区设置 因为在Web应用中经常会用到时区这个系统变量 默认的ubuntu会让你的应用程序发生不可思议的效果哦 COPY jdk /jdk COPY run.sh /run.sh RUN chmod x /run.sh EXPOSE 7001 CMD [/run.sh] 6.run.sh 编写run.sh脚本内容为 #!/bin/bash /user/sbin/sshd -D /opt/Middleware/user_projects/domains/base_domain/startWebLogic.sh 7.创建镜像及测试 使用docker build命令创建镜像命名为weblogicjdk1.6 $ sudo docker build -t weblogic:jdk1.6 . Sending build context to Docker daemon 1.256 GB Sending build context to Docker daemon Step 0 : FROM weblogic_1 --- 6b73c466305f Step 1 : MAINTAINER waitfish from dockerpool.com(dwj_zz163.com) --- Using cache --- c93c4f458baa Step 2 : ENV DEBIAN_FRONTEND noninteractive --- Using cache --- 18fef76dc41b Step 3 : RUN echo Asia/Shanghai /etc/timezone dpkg-reconfigure -f noninteractive tzdata --- Using cache --- d307ba8bd052 Step 4 : COPY jdk /jdk --- Using cache --- a54ffaa93184Step 5 : COPY run.sh /run.sh --- a21b0ccb0b07 Removing intermediate container eabf04e467dd Step 6 : RUN chmod x /run.sh --- Running in 4231d8062f5b --- f46358aac2e3 Removing intermediate container 4231d8062f5b Step 7 : EXPOSE 7001 --- Running in d17c80a9ea5b --- 8bc8dd5c8caa Removing intermediate container d17c80a9ea5b Step 8 : CMD /run.sh --- Running in 45de5ac8883a --- d904fe4f91f9 Removing intermediate container 45de5ac8883a Successfully built d904fe4f91f9 启动一个容器并查看它的映射端口 $ sudo docker run -d -P weblogic:jdk1.6 6c08f5b110affaec256e48b925a1914991c931a8c581f4817fbc5d538e7af2e6 $ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 6c08f5b110af weblogic:jdk1.6 /run.sh 15 seconds ago Up 14 seconds 0.0.0.0:49163-22/tcp, 0.0.0.0:49164-7001/tcp 使用浏览器登录Weblogic控制台如图11-5所示。架构师在控制台设置完启动程序、数据源等参数如图11-6所示之后可以重复使用以上步骤创建适合项目运行的Weblogic镜像。图11-6 Weblogic控制台配置界面Tomcat/weblogic集群部署使用本章推荐的方式部署Tomcat和Weblogic的典型拓扑如图11-7所示图中Weblogic的位置也可用Tomcat容器替换。11.5 LAMPLAMP指的Linux操作系统、ApacheHTTP服务器、MySQL有时也指MariaDB数据库软件和PHP有时也是指Perl或Python的组合方案一般很适合用来建立Web服务器环境。下面介绍如何使用Docker来搭建一个包含LAMP组件的容器。11.5.1 下载LAMP镜像搜索Docker Hub上被收藏或使用较多的LAMP镜像笔者推荐选择tutum/lamp镜像$ sudo docker search -s 10 lampNAME DESCRIPTION STARS OFFICIAL AUTOMATEDtutum/lamp LAMP image - Apache listens in port 80 anhttp://www.hzcourse.com/resource/readBook?path/openresources/teach_ebook/uncompressed/15029/OEBPS/Text/... 31 [OK]执行docker pull命令下载镜像$ sudo docker pull tutum/lampPulling repository tutum/lamp4b32789c7d66: Download completehttp://www.hzcourse.com/resource/readBook?path/openresources/teach_ebook/uncompressed/15029/OEBPS/Text/...11.5.2 使用默认方式启动LAMP容器利用下载的镜像启动一个容器并映射容器的8080端口和3306端口$ sudo docker run -d -p 8080:80 -p 3306:3306 tutum/lamp0ee00c97a5cdefb985baf826c16723f333aa5edddee4072a5107c724ad09f10d$ docker psCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES0ee00c97a5cd tutum/lamp:latest /run.sh 3 seconds ago Up 2 seconds 0.0.0.0:3306-3306/tcp, 0.0.0.0:8080-80/tcp lonely_davinci使用curl命令测试可以查看到默认的应用已经启动$ curl http://127.0.0.1:8080返回的内容如下html head titleHello world!/title style body { background-color: white; text-align: center; padding: 50px; font-family: Open Sans, Helvetica Neue, Helvetica Arial, sans-serif; }# logo { margin-bottom: 40px; } /style /head body img idlogo srclogo.png / h1Hello world!/h1 h2MySQL Server version: 5.5.38-0ubuntu0.14.04.1/h2 /body /html11.5.3 部署自己的PHP应用默认的容器启动了一个helloword应用。读者可以基于此镜像编辑Dockerfile来创建自定义LAMP应用镜像。在宿主主机上创建新的工作目录lamp$ mkdir lamp$ cd lamp$ touch Dockerfile在php目录下里面创建Dockerfile文件内容为FROM tutum/lamp:latestRUN rm -fr /app git clone https://github.com/username/customapp.git /app#这里将https://github.com/username/customapp.git 地址替换为你自己的项目地址EXPOSE 80 3306CMD [/run.sh]创建镜像命名为dockerpool/my-lamp-app$ docker build -t dockerpool/my-lamp-app .利用新创建镜像启动容器注意启动时候指定-d参数让容器后台运行$ docker run -d -p 8080:80 -p 3306:3306 dockerpool/my-lamp-app在本地主机上使用curl看一下自己的应用程序是不是已经正确启动$ curl http://127.0.0.1:8080/11.5.4 在PHP程序中连接数据库1.在容器中访问MySQL数据库下载的tutum/lamp镜像中的MySQL数据库已带有默认的root用户本地连接可以不使用密码所以在代码中访问数据库的实现非常简单?php$mysql new mysqli(localhost root);echo MySQL Server info: .$mysql-host_info;?2.在容器外访问MySQL数据库默认的MySQL数据库不支持root用户远程登录因此在容器外无法直接通过root用户访问MySQL数据库。当第一次使用tutum/lamp镜像启动容器的时候它会自动创建一个叫admin的MySQL用户并生成一个随机密码使用docker logs命令可以获取到这个密码$ sudo docker logs 9cb An empty or uninitialized MySQL volume is detected in /var/lib/mysql Installing MySQL http://www.hzcourse.com/resource/readBook?path/openresources/teach_ebook/uncompressed/15029/OEBPS/Text/... Done! Waiting for confirmation of MySQL service startup Creating MySQL admin user with random password Done! You can now connect to this MySQL Server using: mysql -uadmin -p2Ijg6gvmM0N3 -hhost -Pport Please remember to change the above password as soon as possible! MySQL user root has no password but only allows local connections 注意 admin用户具有root相同的权限。