DockerFile自定义简单的镜像

a.将centos的工作目录设置为/tmp/
b.安装vim编辑器
c.查看网络配置ifconfig支持

1.编写Dockerfile文件

#vim Dockerfile02
#基础镜像为centos:7
FROM centos:7
#设置工作目录
ENV MYPATH /tmp
WORKDIR $MYPATH
#安装vim，net-tools
RUN yum install -y vim
RUN yum install -y net-tools
#容器对外端口
EXPOSE 80

CMD echo $MYPATH
CMD /bin/bash

2.构建镜像 “docker build”

[root@aaa ~/mydocker]# docker build -f Dockerfile02 -t mycentos:01 .
Sending build context to Docker daemon 4.096 kB
Step 1/8 : FROM centos:7
 ---> b5b4d78bc90c
Step 2/8 : ENV MYPATH /tmp
 ---> Using cache
 ---> 319082c348c7
Step 3/8 : WORKDIR $MYPATH
 ---> Using cache
 ---> 942c27a53f8d
Step 4/8 : RUN yum -y install vim
 ---> Using cache
 ---> cde85780d424
Step 5/8 : RUN yum -y install net-tools
 ---> Using cache
 ---> 4b0217f59041
Step 6/8 : EXPOSE 80
 ---> Using cache
 ---> ba401ffa976c
Step 7/8 : CMD echo $MYPATH
 ---> Using cache
 ---> ddabd0922191
Step 8/8 : CMD /bin/bash
 ---> Using cache
 ---> dc7ce76bded4
Successfully built dc7ce76bded4

[root@aaa ~/mydocker]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
mycentos            01                  dc7ce76bded4        4 minutes ago       432 MB

3.运行容器 “docker run”

[root@aaa ~/mydocker]# docker run -it --name test01 mycentos:01

4.查看镜像的历史

[root@aaa ~/mydocker/tomcat9]# docker history mycentos:01
IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
dc7ce76bded4        14 hours ago        /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "/b...   0 B                 
ddabd0922191        14 hours ago        /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "ec...   0 B                 
ba401ffa976c        14 hours ago        /bin/sh -c #(nop)  EXPOSE 80/tcp                0 B                 
4b0217f59041        14 hours ago        /bin/sh -c yum -y install net-tools             87 MB               
cde85780d424        14 hours ago        /bin/sh -c yum -y install vim                   142 MB              
942c27a53f8d        14 hours ago        /bin/sh -c #(nop) WORKDIR /tmp                  0 B                 
319082c348c7        14 hours ago        /bin/sh -c #(nop)  ENV MYPATH=/tmp              0 B                 
b5b4d78bc90c        3 months ago        /bin/sh -c #(nop)  CMD ["/bin/bash"]            0 B                 
<missing>           3 months ago        /bin/sh -c #(nop)  LABEL org.label-schema....   0 B                 
<missing>           3 months ago        /bin/sh -c #(nop) ADD file:38e2d2a1a0cd869...   203 MB