1、构建tomcat基础镜像
1.1、需求
1.2、创建Dockerfile专用目录并且下载tomcat
mkdir /docker/images/tomcat -p && cd /docker/images/tomcat
curl -o apache-tomcat-9.0.75.tar.gz https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.75/bin/apache-tomcat-9.0.75.tar.gz
1.3、定制Dockerfile
cat << 'CAT_END' > Dockerfile
FROM ubuntu-jdk:8u121
MAINTAINER cyc author
ENV TZ "Asia/Shanghai"
ENV LANG en_US.UTF-8
ENV TERM xterm
ENV TOMCAT_MAJOR_VERSION 9
ENV TOMCAT_MINOR_VERSION 9.0.75
ENV CATALINA_HOME /usr/local/tomcat
ENV APP_DIR ${CATALINA_HOME}/webapps
ADD apache-tomcat-9.0.75.tar.gz /usr/local/
RUN ln -s /usr/local/apache-tomcat-9.0.75 /usr/local/tomcat
CMD ["/bin/bash"]
CAT_END
1.4、构建tomcat镜像
docker build -t ubuntu-tomcat:v9.0.75 /docker/images/tomcat/
1.5、使用新镜像启动一个容器，查看效果
]# docker run -it --rm -p 8080:8080 ubuntu-tomcat:v9.0.75 /bin/bash
root@5ebc849ec4b1:/# ll /usr/local/tomcat/
total 128
drwxr-xr-x. 9 root root 220 May 19 04:30 ./
drwxr-xr-x. 1 root root 20 May 19 04:30 ../
-rw-r-----. 1 root root 20123 Apr 14 19:40 BUILDING.txt
-rw-r-----. 1 root root 6210 Apr 14 19:40 CONTRIBUTING.md
-rw-r-----. 1 root root 60393 Apr 14 19:40 LICENSE
-rw-r-----. 1 root root 2333 Apr 14 19:40 NOTICE
-rw-r-----. 1 root root 3398 Apr 14 19:40 README.md
-rw-r-----. 1 root root 6775 Apr 14 19:40 RELEASE-NOTES
-rw-r-----. 1 root root 16076 Apr 14 19:40 RUNNING.txt
drwxr-x---. 2 root root 4096 Apr 14 19:40 bin/
drwx------. 2 root root 238 Apr 14 19:40 conf/
drwxr-x---. 2 root root 4096 Apr 14 19:40 lib/
drwxr-x---. 2 root root 6 Apr 14 19:40 logs/
drwxr-x---. 2 root root 30 Apr 14 19:40 temp/
drwxr-x---. 7 root root 81 Apr 14 19:40 webapps/
drwxr-x---. 2 root root 6 Apr 14 19:40 work/
注意：
因为在构建镜像的时候，已经启动了命令bash，所以可以直接进入进去
1.6、容器手动开启tomcat服务
]# docker run -it --rm -p 8080:8080 ubuntu-tomcat:v9.0.75 /bin/bash
root@4ba25e49df87:/# /usr/local/tomcat/bin/startup.sh
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr/local/java/jre
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:
Tomcat started.
1.7、访问测试
2、构建tomcat项目镜像
2.1、需求
基于基础的 tomcat镜像，运行两个专用的tomcat项目
2.2、创建项目目录和下载tomcat安装解压
mkdir -p /docker/tomcat/webapp{1,2} -p
cd /docker/tomcat && curl -o apache-tomcat-9.0.75.tar.gz https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.75/bin/apache-tomcat-9.0.75.tar.gz && tar xf apache-tomcat-9.0.75.tar.gz
# tomcat版本记得一致,主要用于复制配置文件，修改配置之用
2.3、定制tomcat-webapp1
2.3.1、修改tomcat配置server.xml
cd /docker/tomcat/webapp1/
cp ../apache-tomcat-9.0.75/conf/server.xml .
]# vi server.xml
# 主让tomcat加载项目的位置
<Host name="localhost" appBase="/usr/local/tomcat/webapps"
unpackWARs="true" autoDeploy="false">
2.3.2、定制 tomcat-app1 的应用首页
mkdir ROOT
echo "Welcome to Tomcat app1"> ROOT/index.jsp
tar zcf ROOT.tar.gz ROOT
2.3.3、定制tomcat服务启动脚本
cat << 'CAT_END' > entrypoint.sh
#!/bin/bash
${CATALINA_HOME}/bin/catalina.sh start
tail -f ${CATALINA_HOME}/logs/catalina.out
CAT_END
2.3.4、定制Dockerfile
cat << 'CAT_END' > Dockerfile
FROM ubuntu-tomcat:v9.0.75
MAINTAINER cyc author
WORKDIR /usr/local/tomcat
COPY server.xml ./conf/server.xml
COPY entrypoint.sh /root/
ADD ROOT.tar.gz ./webapps/
EXPOSE 8080
CMD ["bash","/root/entrypoint.sh"]
CAT_END
2.3.5、构建镜像
docker build -t tomcat-webapp1:v0.1 .
2.3.6、运行测试
docker run -d -p 8080:8080 tomcat-webapp1:v0.1
]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
be6fb6f5c9fe tomcat-webapp1:v0.1 "bash /root/entrypoi…" 3 minutes ago Up 3 minutes 0.0.0.0:8080->8080/tcp, :::8080->8080/tcp pensive_rhodes
]# curl 192.168.10.19:8080
Welcome to Tomcat app1
2.4、定制tomcat-webapp2
2.4.1、说明
同样的方式定制webapp2镜像
# 唯一的区别就是主页不一样
2.4.2、访问效果
