构建业务镜像1

创建tomcat-app1和tomcat-app2两个目录，代表不同的两个基于tomcat的业务。

准备tomcat的配置文件

[root@ubuntu1804 ~]#mkdir -p /data/dockerfile/web/tomcat/tomcat-app{1,2}
[root@ubuntu1804 ~]#tree /data/dockerfile/web/tomcat/
/data/dockerfile/web/tomcat/
├── tomcat-app1
├── tomcat-app2
└── tomcat-base-8.5.50
    ├── apache-tomcat-8.5.50.tar.gz
    ├── build.sh
    └── Dockerfile

3 directories, 3 files
#上传和修改server.xml 
[root@ubuntu1804 ~]#cd /data/dockerfile/web/tomcat/tomcat-base-8.5.50
[root@ubuntu1804 tomcat-base-8.5.50]#tar xf apache-tomcat-8.5.50.tar.gz
[root@ubuntu1804 tomcat-base-8.5.50]#cp apache-tomcat-8.5.50/conf/server.xml /data/dockerfile/web/tomcat/tomcat-app1/
[root@ubuntu1804 tomcat-base-8.5.50]#cd /data/dockerfile/web/tomcat/tomcat-app1/
[root@ubuntu1804 tomcat-app1]#vim server.xml
 <Host name="localhost"  appBase="/data/tomcat/webapps"                             
            unpackWARs="true" autoDeploy="true">

准备自定义页面

[root@ubuntu1804 tomcat-app1]#mkdir app
[root@ubuntu1804 tomcat-app1]#echo "Tomcat Page in app1" > app/index.jsp
[root@ubuntu1804 tomcat-app1]#tar zcf app.tar.gz app

准备容器启动执行脚本

[root@ubuntu1804 tomcat-app1]#vim run_tomcat.sh
[root@ubuntu1804 tomcat-app1]#cat run_tomcat.sh
#!/bin/bash
echo "nameserver 180.76.76.76" > /etc/resolv.conf 
su - www -c "/apps/tomcat/bin/catalina.sh start" 
su - www -c "tail -f /etc/hosts"
[root@ubuntu1804 tomcat-app1]#chmod a+x run_tomcat.sh 

准备Dockerfile

[root@ubuntu1804 tomcat-app1]#vim Dockerfile
[root@ubuntu1804 tomcat-app1]#cat Dockerfile 
#Tomcat Web Image 
FROM tomcat-base:v8.5.50
LABEL maintainer="wangxiaochun <root@wangxiaochun.com>"
ADD server.xml /apps/tomcat/conf/server.xml
ADD run_tomcat.sh /apps/tomcat/bin/run_tomcat.sh 
ADD app.tar.gz /data/tomcat/webapps/ 
RUN chown -R www.www /apps/   /data/tomcat/   
EXPOSE 8080  8009
CMD ["/apps/tomcat/bin/run_tomcat.sh"] 

执行构建脚本制作镜像

[root@ubuntu1804 tomcat-app1]#vim build.sh
[root@ubuntu1804 tomcat-app1]#cat build.sh 
#!/bin/bash
docker build -t tomcat-web:app1 .

[root@ubuntu1804 tomcat-app1]#pwd
/data/dockerfile/web/tomcat/tomcat-app1
[root@ubuntu1804 tomcat-app1]#tree
.
├── app
│   └── index.jsp
├── app.tar.gz
├── build.sh
├── Dockerfile
├── run_tomcat.sh
└── server.xml

1 directory, 6 files

[root@ubuntu1804 tomcat-app1]#bash build.sh 
[root@ubuntu1804 tomcat-app1]#docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
tomcat-web          app1                3e9eacc5ef86        4 seconds ago       824MB
tomcat-base         v8.5.50             8d5395cb72c4        35 minutes ago      824MB
centos7-jdk         8u212               e0fe770a7ccd        57 minutes ago      809MB
centos7-base        v1                  34ab3afcd3b3        2 hours ago         403MB
centos              centos7.7.1908      08d05d1d5859        2 months ago        204MB

从镜像启动测试容器

[root@ubuntu1804 tomcat-app1]#docker run -d  -p 8080:8080  tomcat-web:app1
82e6690e36c3a6faf2dae62bd706a89cbba490d567c841c37501f0fba670ea25

访问测试

[root@ubuntu1804 ~]#curl 127.0.0.1:8080/app/
Tomcat Page in app1
[root@ubuntu1804 ~]#docker exec -it 82e6690e36c3  bash
[root@82e6690e36c3 /]# ps aux
USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root          1  0.0  0.2  15136  2248 ?        Ss   22:14   0:00 /bin/bash /apps/tomcat/bin/run_tomcat.sh
www          25  0.8  9.7 2241656 95924 ?       Sl   22:14   0:04 /usr/local/jdk/bin/java -Djava.util.logging.config.file=/apps/tomcat
root         26  0.0  0.4  85428  4472 ?        S    22:14   0:00 su - www -c tail -f /etc/hosts
www          27  0.0  0.0   4416   720 ?        Ss   22:14   0:00 tail -f /etc/hosts
root         82 25.0  0.3  15800  3820 pts/0    Ss   22:22   0:00 bash
root        101  0.0  0.3  55196  3836 pts/0    R+   22:22   0:00 ps aux
[root@82e6690e36c3 /]# vim /data/tomcat/webapps/app/index.jsp 
[root@82e6690e36c3 /]# cat /data/tomcat/webapps/app/index.jsp
Tomcat Page in app1 v2
[root@82e6690e36c3 /]# /apps/tomcat/bin/catalina.sh stop
Using CATALINA_BASE:   /apps/tomcat
Using CATALINA_HOME:   /apps/tomcat
Using CATALINA_TMPDIR: /apps/tomcat/temp
Using JRE_HOME:        /usr/local/jdk/jre
Using CLASSPATH:       /apps/tomcat/bin/bootstrap.jar:/apps/tomcat/bin/tomcat-juli.jar
[root@82e6690e36c3 /]# /apps/tomcat/bin/catalina.sh start
Using CATALINA_BASE:   /apps/tomcat
Using CATALINA_HOME:   /apps/tomcat
Using CATALINA_TMPDIR: /apps/tomcat/temp
Using JRE_HOME:        /usr/local/jdk/jre
Using CLASSPATH:       /apps/tomcat/bin/bootstrap.jar:/apps/tomcat/bin/tomcat-juli.jar
Tomcat started.

[root@ubuntu1804 tomcat-app1]#curl 127.0.0.1:8080/app/
Tomcat Page in app1 v2

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