13518219792
这篇文章主要为大家展示了“docker中Dockerfile如何自定义mycentos”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“docker中Dockerfile如何自定义mycentos”这篇文章吧。
Docker Hub中99%的镜像是通过在base镜像中安装和配置需要的软件构建出来的。也就是说base镜像是所有其他镜像的鼻祖。
[root@t-docker chenzx]# docker run -it centos [root@ef7873879474 /]# vim a.txt ##默认ceonts不支持vim命令 bash: vim: command not found [root@ef7873879474 /]# ifconfig ##默认centos不支持ifconfig命令 bash: ifconfig: command not found
1、编写Dokcerfile文件
[root@t-docker mycentos]# cat Dockerfile FROM centos MAINTAINER chenzx chenzx@11.com ENV MYPATH /usr/local WORKDIR $MYPATH RUN yum -y install vim RUN yum -y install net-tools EXPOSE 80 CMD echo $MYPATH CMD echo "success-----ok" CMD /bin/bash
2、构建
语法：docker build -t 新镜像名字：TAG .
[root@t-docker mycentos]# docker build -f ./Dockerfile -t mycentos:1.3 . Sending build context to Docker daemon 2.048kB Step 1/10 : FROM centos ---> 5182e96772bf Step 2/10 : MAINTAINER chenzx chenzx@11.com ---> Running in bf692c9a8f30 Removing intermediate container bf692c9a8f30 ---> be7c6d72dcf6 Step 3/10 : ENV MYPATH /usr/local ---> Running in bfbe973063c4 Removing intermediate container bfbe973063c4 ---> b6117be61d21 Step 4/10 : WORKDIR $MYPATH ---> Running in dc207977e37e Removing intermediate container dc207977e37e ---> a299de1b142d Step 5/10 : RUN yum -y install vim ---> Running in 7b18a2ea02ba Loaded plugins: fastestmirror, ovl Determining fastest mirrors * base: mirror.bit.edu.cn * extras: mirror.bit.edu.cn * updates: mirror.bit.edu.cn Resolving Dependencies --> Running transaction check ---> Package vim-enhanced.x86_64 2:7.4.160-4.el7 will be installed --> Processing Dependency: vim-common = 2:7.4.160-4.el7 for package: 2:vim-enhanced-7.4.160-4.el7.x86_64 --> Processing Dependency: which for package: 2:vim-enhanced-7.4.160-4.el7.x86_64 --> Processing Dependency: perl(:MODULE_COMPAT_5.16.3) for package: 2:vim-enhanced-7.4.160-4.el7.x86_64 --> Processing Dependency: libperl.so()(64bit) for package: 2:vim-enhanced-7.4.160-4.el7.x86_64 ---> 41b54eafc062 Step 6/10 : RUN yum -y install net-tools ---> Running in 4fe95a3f928d Loaded plugins: fastestmirror, ovl Loading mirror speeds from cached hostfile * base: mirror.bit.edu.cn * extras: mirror.bit.edu.cn * updates: mirror.bit.edu.cn Resolving Dependencies --> Running transaction check Step 7/10 : EXPOSE 80 ---> Running in b49331f041a0 Removing intermediate container b49331f041a0 ---> 255ce503616b Step 8/10 : CMD echo $MYPATH ---> Running in 0c8a45aa210f Removing intermediate container 0c8a45aa210f ---> b70d750b50c6 Step 9/10 : CMD echo "success-----ok" ---> Running in 0f82aaeab3af Removing intermediate container 0f82aaeab3af ---> 41680031171e Step 10/10 : CMD /bin/bash ---> Running in 5694bd9a1dab Removing intermediate container 5694bd9a1dab ---> 0c868c56748b Successfully built 0c868c56748b Successfully tagged mycentos:1.3 [root@t-docker mycentos]#
[root@t-docker mycentos]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE mycentos 1.3 0c868c56748b 5 minutes ago 442MB
3、运行
