Docker镜像分层构建

构建Tomcat镜像 1.构建基础镜像 mkdir /opt/dockerfile/system/ubuntu vim /opt/dockerfile/system/ubuntu/Dockerfile #Ubuntu Base Image FROM ubuntu:20.04 MAINTAINER shitouweb [e-mail] RUN apt-get update && apt-get install -y wget libpcre3 libpcre3-dev openssl libssl-dev zlib1g-dev iproute2 net-tools iotop gcc g++ automake build-essential unzip tzdata RUN groupadd www -g 2020 && useradd www -u 2020 -g www vim /opt/dockerfile/system/ubuntu/ #!/bin/bash sudo docker build -t ubuntu-base:20.04 . 2.构建JDK镜像 mkdir /opt/dockerfile/web/jdk/jdk-8U251 vim /opt/dockerfile/web/jdk/jdk-8U251/Dockerfile #JDK-8U251

	FROM ubuntu-base:20.04

	MAINTAINER shitouweb "[e-mail]"

	ADD jdk-8u251-linux-x64.tar.gz /usr/local/src/

	RUN ln -sv /usr/local/src/jdk1.8.0_251 /usr/local/jdk

	ADD profile /etc/profile

	ENV JAVA_HOME /usr/local/jdk
	ENV JRE_HOME $JAVA_HOME/jre
	ENV CLASSPATH  $JAVA_HOME/lib/:$JRE_HOME/lib/
	ENV PATH $PATH:$JAVA_HOME/bin

	RUN rm -rf /etc/localtime && ln -snf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

vim /opt/dockerfile/web/jdk/jdk-8U251/profile #可以在虚拟机中先搭建java环境变量然后复制profile文件即可，添加以下 export JAVA_HOME=/usr/local/jdk export CLASSPATH=$JAVA_HOME/jre/lib/rt.jar:$JRE_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$PATH:$JAVA_HOME/bin vim /opt/dockerfile/web/jdk/jdk-8U251/ #!/bin/bash sudo docker build -t ubuntu20.04-jkd:8U251 . 3.构建Tomcat镜像 mkdir /opt/dockerfile/web/tomcat/tomcat-9.0.35 vim /opt/dockerfile/web/tomcat/tomcat-9.0.35/Dockerfile FROM ubuntu20.04-jkd:8U251 LABEL shitouweb [e-mail] ADD apache-tomcat-9.0.35.tar.gz /apps RUN ln -sv /apps/apache-tomcat-9.0.35 /apps/tomcat vim /opt/dockerfile/web/tomcat/tomcat-9.0.35/ #!/bin/bash sudo docker build -t ubuntu20.04-tomcat:9.0.35 . 4.构建业务镜像 mkdir /opt/dockerfile/web/tomcat/tomcat-app1 vim /opt/dockerfile/web/tomcat/tomcat-app1/Dockerfile FROM ubuntu20.04-tomcat:9.0.35

	LABEL shitouweb [e-mail]

	ADD server.xml /apps/tomcat/conf/server.xml

	ADD docker-1.tar.gz /data/tomcat/webapps

	ADD run_tomcat.sh /apps/tomcat/bin/run_tomcat.sh

	RUN chown -R www:www /apps/

	EXPOSE 8080 8005

	CMD ["/apps/tomcat/bin/run_tomcat.sh"]

vim /opt/dockerfile/web/tomcat/tomcat-app1/ #!/bin/bash sudo docker build -t ubuntu20.04-tomcat0.0.35-webapps:1 . vim /opt/dockerfile/web/tomcat/tomcat-app1/run_tomcat.sh可执行文件必须增加执行权限，否则在容器中不能执行 su -c '/apps/tomcat/bin/ start' - www tail -f /etc/hosts 修改server.xml <Host name="localhost" appBase="/data/tomcat/webapps" unpackWARs="false" autoDeploy="false"> 注意：在DockerFile中写入的CMD后面的命令不执行主要是因为启动的时候指定了shell