Dockerfile构建Tomcat镜像

准备apache包和jdk并解压

[root@localhost tomcat]# ll

总用量 196728

-rw-r--r--. 1 root root   9690027 7月 17 2020 apache-tomcat-8.5.40.tar.gz

-rw-r--r--. 1 root root       674 8月   2 20:19 Dockerfile

-rw-r--r--. 1 root root 191753373 7月 17 2020 jdk-8u191-linux-x64.tar.gz

[root@localhost tomcat]# tar xf apache-tomcat-8.5.40.tar.gz

[root@localhost tomcat]# tar xf jdk-8u191-linux-x64.tar.gz

[root@localhost tomcat]# ll

总用量 196728

drwxr-xr-x. 9 root root       220 8月   3 13:58 apache-tomcat-8.5.40

-rw-r--r--. 1 root root   9690027 7月 17 2020 apache-tomcat-8.5.40.tar.gz

-rw-r--r--. 1 root root       552 8月   3 13:55 Dockerfile

drwxr-xr-x. 7   10 143       245 10月 6 2018 jdk1.8.0_191

-rw-r--r--. 1 root root 191753373 7月 17 2020 jdk-8u191-linux-x64.tar.gz

创建工作目录

[root@localhost ]# mkdir tomcat

编写dockerfile文件

[root@localhost tomcat]# vim Dockerfile

FROM centos:7

MAINTAINER Crushlinux <crushlinux@163.com

ADD jdk1.8.0_191 /usr/local/java

ENV JAVA_HOME /usr/local/java

ENV JAVA_BIN /use/local/java/bin

ENV JRE_HOME /usr/local/java/jre

ENV PATH $PATH:/usr/local/java/bin:/usr/local/java/jre/bin

ENV CLASSPATH /usr/local/java/jre/bin:/usr/local/java/lib:/usr/local/java/jre/lib/charsets.jar

ADD apache-tomcat-8.5.40 /usr/local/tomcat

RUN chmod 755 /usr/local/tomcat/bin/startup.sh

RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

EXPOSE 8080

CMD ["/usr/local/tomcat/bin/catalina.sh","run"]

~

具体来说，这个Dockerfile文件的内容如下：

FROM centos:7：表示基础镜像是CentOS 7。
MAINTAINER Crushlinux <crushlinux@163.com>：表示维护者信息，即该Docker镜像的作者和联系方式。
ADD jdk1.8.0_191 /usr/local/java：将JDK压缩包解压到/usr/local/java目录下。
ENV JAVA_HOME /usr/local/java：设置JAVA_HOME环境变量为/usr/local/java。
ENV JAVA_BIN /usr/local/java/bin：设置JAVA_BIN环境变量为/usr/local/java/bin。
ENV JRE_HOME /usr/local/java/jre：设置JRE_HOME环境变量为/usr/local/java/jre。
ENV PATH $PATH:/usr/local/java/bin:/usr/local/java/jre/bin：将/usr/local/java/bin和/usr/local/java/jre/bin添加到PATH环境变量中。
ENV CLASSPATH /usr/local/java/jre/bin:/usr/local/java/lib:/usr/local/java/jre/lib/charsets.jar：设置CLASSPATH环境变量为/usr/local/java/jre/bin:/usr/local/java/lib:/usr/local/java/jre/lib/charsets.jar。
ADD apache-tomcat-8.5.40 /usr/local/tomcat：将Tomcat压缩包解压到/usr/local/tomcat目录下。
RUN chmod 755 /usr/local/tomcat/bin/startup.sh：设置/usr/local/tomcat/bin/startup.sh文件的权限为755。
RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime：创建一个软链接将系统时区设置为上海。
EXPOSE 8080：将容器的8080端口暴露出来

构建镜像

[root@localhost tomcat]# docker build -t tomcat:new .Sending build context to Docker daemon   614 MBStep 1/13 : FROM centos:7---> 74d9a3a7d55dStep 2/13 : MAINTAINER Crushlinux <crushlinux@163.com---> Using cache---> efa399b03844Step 3/13 : ADD jdk1.8.0_191 /usr/local/java---> 6c3bcd8412e8Removing intermediate container 2ee47f838026Step 4/13 : ENV JAVA_HOME /usr/local/java---> Running in e9f1e8c91c15---> a2bfe81ba7f5Removing intermediate container e9f1e8c91c15Step 5/13 : ENV JAVA_BIN /use/local/java/bin---> Running in abbe840f87de---> 8a62172d033aRemoving intermediate container abbe840f87deStep 6/13 : ENV JRE_HOME /usr/local/java/jre---> Running in 4209c7fe0c4a---> 9936e3b14561Removing intermediate container 4209c7fe0c4aStep 7/13 : ENV PATH $PATH:/usr/local/java/bin:/usr/local/java/jre/bin---> Running in 3f266fb8c13e---> 11bfac038ca4Removing intermediate container 3f266fb8c13eStep 8/13 : ENV CLASSPATH /usr/local/java/jre/bin:/usr/local/java/lib:/usr/local/java/jre/lib/charsets.jar---> Running in 681f67cde11e---> 62e50122b88aRemoving intermediate container 681f67cde11eStep 9/13 : ADD apache-tomcat-8.5.40 /usr/local/tomcat---> abfee70cf80bRemoving intermediate container 456e93af2eb9Step 10/13 : RUN chmod 755 /usr/local/tomcat/bin/startup.sh---> Running in 886999728ff0---> bcdc9c2a7630Removing intermediate container 886999728ff0Step 11/13 : RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime---> Running in b513e27c3035---> eafbe22ec214Removing intermediate container b513e27c3035Step 12/13 : EXPOSE 8080---> Running in 9d3d4047a2e3---> 4149863793a1Removing intermediate container 9d3d4047a2e3Step 13/13 : CMD /usr/local/tomcat/bin/catalina.sh run---> Running in 97d46c7d6b1b---> ccdba3e6ed6aRemoving intermediate container 97d46c7d6b1bSuccessfully built ccdba3e6ed6a

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