Docker构建JDK+Tomcat镜像

你的名字 2020-11-28 17:38 754阅读 0赞

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本文环境为CentOS，在制作镜像之前，请先下载好Linux版的JDK和Tomcat，我所演示的版本为：`jdk-8u162-linux-x64.tar.gz`、`apache-tomcat-8.0.47.tar.gz`

*  保证JDK、Tomcat、Dockerfile 处于同一目录下（本次演示目录为：/home）

[root@iZbp1b5k5bjps0dw8owk7tZ home]# ls
    apache-tomcat-8.0.47.tar.gz  Dockerfile  jdk-8u162-linux-x64.tar.gz
    [root@iZbp1b5k5bjps0dw8owk7tZ home]#

编写docker构建文件（Dockerfile）

# 编辑Dockerfile
    vi Dockerfile

不知道什么是Dockerfile？ 也不会写？，OK，Ctrl+C 就好了，不过请将jdk和tomcat的版本和版本后面对应的路径改为自己指定的版本和路径

# 基础镜像
    FROM centos
    # 作者
    MAINTAINER  yezi
    # 把jdk与tomcat添加到容器中
    ADD jdk-8u162-linux-x64.tar.gz /usr/local/
    ADD apache-tomcat-8.0.47.tar.gz /usr/local/
    # 配置环境变量
    ENV JAVA_HOME /usr/local/jdk1.8.0_162
    ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
    ENV CATALINA_HOME /usr/local/apache-tomcat-8.0.47
    ENV CATALINA_BASE /usr/local/apache-tomcat-8.0.47
    ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin
    # 容器运行时监听的端口
    EXPOSE 8080
    #配置容器启动后执行的命令
    ENTRYPOINT /usr/local/apache-tomcat-8.0.47/bin/startup.sh && tail -f /usr/local/apache-tomcat-8.0.47/logs/catalina.out
    #启动时运行tomcat
    CMD ["/usr/local/apache-tomcat-8.0.47/bin/catalina.sh","run"]

*  `ENTRYPOINT`这个命令主要是为了解决tomcat容器不打印catalina.out日志，可以省去

构建镜像

# 以当前目录下(.)的 Dockerfile 文件 构建镜像名为 yezi/tomcat 的镜像
    docker build -t yezi/tomcat .

[root@iZbp1b5k5bjps0dw8owk7tZ test]# docker build -t yezi/tomcat .
    Sending build context to Docker daemon  199.2MB
    Step 1/11 : FROM centos
     ---> 49f7960eb7e4
    Step 2/11 : MAINTAINER  yezi
     ---> Running in 23ab370a223c
    Removing intermediate container 23ab370a223c
     ---> eb683d133105
    Step 3/11 : ADD jdk-8u162-linux-x64.tar.gz /usr/local/
     ---> cf74a462ef4a
    Step 4/11 : ADD apache-tomcat-8.0.47.tar.gz /usr/local/
     ---> 50e1b915e404
    Step 5/11 : ENV JAVA_HOME /usr/local/jdk1.8.0_162
     ---> Running in 62651c01180d
    Removing intermediate container 62651c01180d
     ---> 0f440b8fb05c
    Step 6/11 : ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
     ---> Running in e7b22ff3daae
    Removing intermediate container e7b22ff3daae
     ---> 1d7561a73619
    Step 7/11 : ENV CATALINA_HOME /usr/local/apache-tomcat-8.0.47
     ---> Running in 10d6926828af
    Removing intermediate container 10d6926828af
     ---> 7ee45ddd1cac
    Step 8/11 : ENV CATALINA_BASE /usr/local/apache-tomcat-8.0.47
     ---> Running in 6dc85ca63503
    Removing intermediate container 6dc85ca63503
     ---> 9ccb74f42ac8
    Step 9/11 : ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin
     ---> Running in 95f3447c1345
    Removing intermediate container 95f3447c1345
     ---> afa972c0579f
    Step 10/11 : EXPOSE 8080
     ---> Running in 8ec9bc003730
    Removing intermediate container 8ec9bc003730
     ---> 0d64ccb2b12e
    Step 11/11 : CMD ["/usr/local/apache-tomcat-8.0.47/bin/catalina.sh","run"]
     ---> Running in 60877645aadd
    Removing intermediate container 60877645aadd
     ---> ed785fcf2d5f
    Successfully built ed785fcf2d5f
    Successfully tagged yezi/tomcat:latest
    [root@iZbp1b5k5bjps0dw8owk7tZ test]#

查看构建的镜像

[root@iZbp1b5k5bjps0dw8owk7tZ home]# docker images
    REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
    yezi/tomcat         latest              ed785fcf2d5f        About an hour ago   598MB
    tomcat              latest              2d084b11164d        31 hours ago        463MB
    centos              latest              49f7960eb7e4        4 weeks ago         200MB
    [root@iZbp1b5k5bjps0dw8owk7tZ home]#

启动镜像

docker run -d -p 8080:8080 yezi/tomcat

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