构建自己的centos

新建mydockerfile

FROM centos
MAINTAINER lh<aaa@163.com>

ENV MYPATH /usr/local
WORKDIR $MYPATH

EXPOSE 80

CMD echo $MYPATH

CMD yum -y install vim

EXPOSE 80

CMD echo $MYPATH
CMD echo "------END------"
CMD /bin/bash

构建镜像

lh@lh-pc:~/dockerfile$ docker build -f mydockerfile -t mycentos:0.1 .

lh@lh-pc:~/dockerfile$ docker images
REPOSITORY            TAG       IMAGE ID       CREATED         SIZE
mycentos              0.1       4bd044279345   2 minutes ago   231MB

测试运行镜像

docker run -it mycentos:0.1 /bin/bash

查看镜像的构建过程

docker history 镜像id

lh@lh-pc:~/dockerfile$ docker history 7772b6af6a69
IMAGE          CREATED          CREATED BY                                      SIZE      COMMENT
7772b6af6a69   3 minutes ago    /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "/bin…   0B        
774142d33d60   3 minutes ago    /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "echo…   0B        
bc7bc9a2c676   3 minutes ago    /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "echo…   0B        
13765667da07   3 minutes ago    /bin/sh -c #(nop)  EXPOSE 80                    0B        
31b7b9e33e76   3 minutes ago    /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "yum …   0B        
ec075d903f33   46 minutes ago   /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "echo…   0B        
eeed3283d442   46 minutes ago   /bin/sh -c #(nop)  EXPOSE 80                    0B        
d2c23717be2f   2 hours ago      /bin/sh -c #(nop) WORKDIR /usr/local            0B        
15029f5abc30   2 hours ago      /bin/sh -c #(nop)  ENV MYPATH=/usr/local        0B        
f148fcbb7846   2 hours ago      /bin/sh -c #(nop)  MAINTAINER lh<aaa@163.com>   0B        
5d0da3dc9764   14 months ago    /bin/sh -c #(nop)  CMD ["/bin/bash"]            0B        
<missing>      14 months ago    /bin/sh -c #(nop)  LABEL org.label-schema.sc…   0B        
<missing>      14 months ago    /bin/sh -c #(nop) ADD file:805cb5e15fb6e0bb0…   231MB

image.png