编写Dockerfile增强centos镜像：安装vim 和net-tools

批量删除正在运行的docker容器

docker rm -f $(docker ps -q)

#删除正在运行的容器 -q是容器ID
docker rm -f $(docker ps -q)

docker run -it centos /bin/bash
[root@c35acdee94f5 /]# pwd
/
[root@c35acdee94f5 /]# vim 1.txt
bash: vim: command not found
[root@c35acdee94f5 /]#

增强centos镜像

Dockerfile脚本内容

FROM centos
MAINTAINER zxl
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

自定义Dockerfile脚本名称

docker build -f /workspace/docker/Dockerfile_mycentos -t mycentos:1.0 .

#构建日志分析

docker build -f /workspace/docker/Dockerfile_mycentos -t mycentos:1.0 .

Sending build context to Docker daemon  2.048kB
Step 1/10 : FROM centos
 ---> 831691599b88
Step 2/10 : MAINTAINER zxl
 ---> Running in e07788688d45
Removing intermediate container e07788688d45
 ---> a82dcc01fd28
Step 3/10 : ENV MYPATH /usr/local
 ---> Running in 41025cc720ea
Removing intermediate container 41025cc720ea
 ---> c8a228cfb683
Step 4/10 : WORKDIR $MYPATH
 ---> Running in d5886ae1db81
Removing intermediate container d5886ae1db81
 ---> a8a64debc724
Step 5/10 : RUN yum -y install vim
 ---> Running in 6aff19c80e35
 Removing intermediate container 6aff19c80e35
 ---> 305e52dde1a4
Step 6/10 : RUN yum -y install net-tools
 ---> Running in 65cedbfcbd04
 Removing intermediate container 65cedbfcbd04
 ---> 4205f2211f78
Step 7/10 : EXPOSE 80
 ---> Running in 4587d06aa791
Removing intermediate container 4587d06aa791
 ---> 33c9f36fedd5
Step 8/10 : CMD echo $MYPATH
 ---> Running in 67121426d7bd
Removing intermediate container 67121426d7bd
 ---> e9dfce53a5cf
Step 9/10 : CMD echo "success--------------------ok"
 ---> Running in f04f2b2cee9a
Removing intermediate container f04f2b2cee9a
 ---> af402f3387d7
Step 10/10 : CMD /bin/bash
 ---> Running in e81a287c288a
Removing intermediate container e81a287c288a
 ---> 512d695d8553
Successfully built 512d695d8553
Successfully tagged mycentos:1.0

docker images
REPOSITORY          TAG                 IMAGE ID            CREATED              SIZE
mycentos            1.0                 512d695d8553        About a minute ago   295MB
centos              latest              831691599b88        6 weeks ago          215MB

基于自定义centos镜像运行容器

vim和ifconfig的命令都支持了。

docker run -it mycentos:1.0 /bin/bash

[root@03dbfdb30935 local]# pwd
/usr/local
[root@03dbfdb30935 local]# vim 1.txt
[root@03dbfdb30935 local]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.17.0.2  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:ac:11:00:02  txqueuelen 0  (Ethernet)
        RX packets 26  bytes 4558 (4.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@03dbfdb30935 local]#

docker history命令

docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
mycentos            1.0                 512d695d8553        12 minutes ago      295MB
centos              latest              831691599b88        6 weeks ago         215MB

docker history 512d695d8553
IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
512d695d8553        12 minutes ago      /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "/bin…   0B
af402f3387d7        12 minutes ago      /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "echo…   0B
e9dfce53a5cf        12 minutes ago      /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "echo…   0B
33c9f36fedd5        12 minutes ago      /bin/sh -c #(nop)  EXPOSE 80                    0B
4205f2211f78        12 minutes ago      /bin/sh -c yum -y install net-tools             22.8MB
305e52dde1a4        13 minutes ago      /bin/sh -c yum -y install vim                   57.2MB
a8a64debc724        14 minutes ago      /bin/sh -c #(nop) WORKDIR /usr/local            0B
c8a228cfb683        14 minutes ago      /bin/sh -c #(nop)  ENV MYPATH=/usr/local        0B
a82dcc01fd28        14 minutes ago      /bin/sh -c #(nop)  MAINTAINER zxl               0B
831691599b88        6 weeks ago         /bin/sh -c #(nop)  CMD ["/bin/bash"]            0B
<missing>           6 weeks ago         /bin/sh -c #(nop)  LABEL org.label-schema.sc…   0B
<missing>           6 weeks ago         /bin/sh -c #(nop) ADD file:84700c11fcc969ac0…   215MB