docker制作jdk镜像

Posted 2020-12-01 wlwl

同级目录下创建一个Dockerfile，必须叫这个名字
[root@localhost file]# ll
total 181296
-rw-r--r--. 1 root root         0 Oct 31 10:34 Dockerfile
-rw-r--r--. 1 root root 185646832 Mar 28  2019 jdk-8u181-linux-x64.tar.gz
编写Dockerfile
[root@localhost file]# vim Dockerfile 
[root@localhost file]# cat Dockerfile 
# 基于centos7，如果没有这个镜像那么它会下载这个镜像。
FROM centos:7
# 创建者(这个可以不写)
MAINTAINER 吴磊
# 为Dockerfile中所有RUN、CMD、ENTRYPOINT、COPY和ADD指令设定工作目录
WORKDIR /usr
# 执行命令(这里创建了一个目录)
RUN mkdir /usr/local/java
# 和copy一样，复制文件到指定目录，但是copy不能解压，add自动解压
ADD jdk-8u181-linux-x64.tar.gz /usr/local/java
# 设置环境变量(不知道文件名可以现在宿主机解压后看一下)
ENV JAVA_HOME /usr/local/java/jdk1.8.0_181
ENV JRE_HOME $JAVA_HOME/jre
ENV CLASSPATH $JAVA_HOME/bin/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib:$CLASSPATH
ENV PATH #JAVA_HOME/bin:$PATH
执行dockerfile文件，创建的镜像名为jdk1.8，最后面的点表示当前目录(即dockerfile所在目录)
[root@localhost file]# docker build -t=‘jdk1.8‘ .
Sending build context to Docker daemon  185.7MB
Step 1/9 : FROM centos:7
 ---> 67fa590cfc1c
Step 2/9 : MAINTAINER 吴磊
 ---> Running in 463fa71ed61d
Removing intermediate container 463fa71ed61d
 ---> 688735620112
Step 3/9 : WORKDIR /usr
 ---> Running in fd1295dcef88
Removing intermediate container fd1295dcef88
 ---> 21de4cf7978d
Step 4/9 : RUN mkdir /usr/local/java
 ---> Running in 664aa88a0984
Removing intermediate container 664aa88a0984
 ---> 89e5d852cbb3
Step 5/9 : ADD jdk-8u181-linux-x64.tar.gz /usr/local/java
 ---> f21dc033c80a
Step 6/9 : ENV JAVA_HOME /usr/local/java/jdk1.8.0_181
 ---> Running in e013ce2a06e9
Removing intermediate container e013ce2a06e9
 ---> c95cd67fda2d
Step 7/9 : ENV JRE_HOME $JAVA_HOME/jre
 ---> Running in 2d10888a4dcd
Removing intermediate container 2d10888a4dcd
 ---> 36e4346c5045
Step 8/9 : ENV CLASSPATH $JAVA_HOME/bin/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib:$CLASSPATH
 ---> Running in 697be4f29d3d
Removing intermediate container 697be4f29d3d
 ---> 9e148990099d
Step 9/9 : ENV PATH #JAVA_HOME/bin:$PATH
 ---> Running in 0fccaf805f73
Removing intermediate container 0fccaf805f73
 ---> b591f5c69edd
Successfully built b591f5c69edd
Successfully tagged jdk1.8:latest
查看所有的镜像，此时就多了一个jdk1.8
[root@localhost file]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
jdk1.8              latest              b591f5c69edd        17 seconds ago      584MB
centos              7                   67fa590cfc1c        2 months ago        202MB
registry            latest              f32a97de94e1        7 months ago        25.8MB
[root@localhost file]#