27-实战-构建自己的centos
1、编写dockerfile文件，创建自己的centos
[root@localhost /]# cd home
[root@localhost home]# ls
bj docker-test-volume fox girl.zip huazi liuhuaqiang mysql pc.tar.gz test ts yangmi
daiqinghe dqh girl home jack milan oc.tar.gz ss tom wk zwj
[root@localhost home]# mkdir dockerfile
[root@localhost home]# cd dockerfile/
[root@localhost dockerfile]# vim mydockerfile-centos
编写mydockerfile-centos文件：
FROM centos
MAINTAINER dqh<2634897499@qq.com>
ENV MYPATH /usr/local
WORKDIR $MYPATH
RUN yum -y install vim # 安装vim命令
RUN yum -y install net-tools # 安装net-tools命令
EXPOSE 80 # 暴露80端口
CMD echo $MYPATH
CMD echo "---end---"
CMD /bin/bash
2、通过这个文件，构建镜像
命令： docker build -f dockerfile路径 -t 镜像名:[版本号] .
[root@localhost dockerfile]# docker build -f mydockerfile-centos -t mycentos:0.1 .
Sending build context to Docker daemon 2.048kB
Step 1/10 : FROM centos
---> 5d0da3dc9764
Step 2/10 : MAINTAINER dqh<2634897499@qq.com>
---> Running in 40ab42a5a204
Removing intermediate container 40ab42a5a204
---> 4d291067eca1
Step 3/10 : ENV MYPATH /usr/local
---> Running in e647b7328f1a
Removing intermediate container e647b7328f1a
---> 4db803d07f4f
Step 4/10 : WORKDIR $MYPATH
---> Running in 990078f196f3
Removing intermediate container 990078f196f3
---> b48576244d52
Step 5/10 : RUN yum -y install vim
---> Running in 01f3171169b6
CentOS Linux 8 - AppStream 1.8 MB/s | 8.4 MB 00:04
CentOS Linux 8 - BaseOS 1.4 MB/s | 4.6 MB 00:03
CentOS Linux 8 - Extras 6.2 kB/s | 10 kB 00:01
Dependencies resolved.
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
vim-enhanced x86_64 2:8.0.1763-16.el8 appstream 1.4 M
Installing dependencies:
gpm-libs x86_64 1.20.7-17.el8 appstream 39 k
vim-common x86_64 2:8.0.1763-16.el8 appstream 6.3 M
vim-filesystem noarch 2:8.0.1763-16.el8 appstream 49 k
which x86_64 2.21-16.el8 baseos 49 k
Transaction Summary
================================================================================
Install 5 Packages
Total download size: 7.8 M
Installed size: 30 M
Downloading Packages:
(1/5): gpm-libs-1.20.7-17.el8.x86_64.rpm 55 kB/s | 39 kB 00:00
(2/5): vim-filesystem-8.0.1763-16.el8.noarch.rp 299 kB/s | 49 kB 00:00
(3/5): vim-enhanced-8.0.1763-16.el8.x86_64.rpm 540 kB/s | 1.4 MB 00:02
(4/5): vim-common-8.0.1763-16.el8.x86_64.rpm 1.4 MB/s | 6.3 MB 00:04
(5/5): which-2.21-16.el8.x86_64.rpm 12 kB/s | 49 kB 00:04
--------------------------------------------------------------------------------
Total 1.2 MB/s | 7.8 MB 00:06
warning: /var/cache/dnf/appstream-02e86d1c976ab532/packages/gpm-libs-1.20.7-17.el8.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 8483c65d: NOKEY
CentOS Linux 8 - AppStream 1.6 MB/s | 1.6 kB 00:00
Importing GPG key 0x8483C65D:
Userid : "CentOS (CentOS Official Signing Key) <security@centos.org>"
Fingerprint: 99DB 70FA E1D7 CE22 7FB6 4882 05B5 55B3 8483 C65D
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
Key imported successfully
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : which-2.21-16.el8.x86_64 1/5
Installing : vim-filesystem-2:8.0.1763-16.el8.noarch 2/5
Installing : vim-common-2:8.0.1763-16.el8.x86_64 3/5
Installing : gpm-libs-1.20.7-17.el8.x86_64 4/5
Running scriptlet: gpm-libs-1.20.7-17.el8.x86_64 4/5
Installing : vim-enhanced-2:8.0.1763-16.el8.x86_64 5/5
Running scriptlet: vim-enhanced-2:8.0.1763-16.el8.x86_64 5/5
Running scriptlet: vim-common-2:8.0.1763-16.el8.x86_64 5/5
Verifying : gpm-libs-1.20.7-17.el8.x86_64 1/5
Verifying : vim-common-2:8.0.1763-16.el8.x86_64 2/5
Verifying : vim-enhanced-2:8.0.1763-16.el8.x86_64 3/5
Verifying : vim-filesystem-2:8.0.1763-16.el8.noarch 4/5
Verifying : which-2.21-16.el8.x86_64 5/5
Installed:
gpm-libs-1.20.7-17.el8.x86_64 vim-common-2:8.0.1763-16.el8.x86_64
vim-enhanced-2:8.0.1763-16.el8.x86_64 vim-filesystem-2:8.0.1763-16.el8.noarch
which-2.21-16.el8.x86_64
Complete!
Removing intermediate container 01f3171169b6
---> 499ff2dac21a
Step 6/10 : RUN yum -y install net-tools
---> Running in 5cc084f30920
Last metadata expiration check: 0:00:13 ago on Thu Jan 13 13:46:30 2022.
Dependencies resolved.
================================================================================
Package Architecture Version Repository Size
================================================================================
Installing:
net-tools x86_64 2.0-0.52.20160912git.el8 baseos 322 k
Transaction Summary
================================================================================
Install 1 Package
Total download size: 322 k
Installed size: 942 k
Downloading Packages:
net-tools-2.0-0.52.20160912git.el8.x86_64.rpm 616 kB/s | 322 kB 00:00
--------------------------------------------------------------------------------
Total 242 kB/s | 322 kB 00:01
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : net-tools-2.0-0.52.20160912git.el8.x86_64 1/1
Running scriptlet: net-tools-2.0-0.52.20160912git.el8.x86_64 1/1
Verifying : net-tools-2.0-0.52.20160912git.el8.x86_64 1/1
Installed:
net-tools-2.0-0.52.20160912git.el8.x86_64
Complete!
Removing intermediate container 5cc084f30920
---> 43bb774261da
Step 7/10 : EXPOSE 80
---> Running in 4b7ff1b107d4
Removing intermediate container 4b7ff1b107d4
---> 1b86c8105256
Step 8/10 : CMD echo $MYPATH
---> Running in 5e6ed97cf2fa
Removing intermediate container 5e6ed97cf2fa
---> ab0898794eed
Step 9/10 : CMD echo "---end---"
---> Running in d042d1f838c5
Removing intermediate container d042d1f838c5
---> 7734ee3e9c45
Step 10/10 : CMD /bin/bash
---> Running in 70b3c8649dc1
Removing intermediate container 70b3c8649dc1
---> 7fd0813c73b7
Successfully built 7fd0813c73b7
Successfully tagged mycentos:0.1
3、运行我们自己的镜像
可以看到，一进去查看目录就是/usr/local,因为我们dockerfile里面配置了工作目录
可以使用ifconfig命令
可以使用vim命令
4、命令
docker history 镜像id可以显示镜像的变更历史
[root@localhost dockerfile]# docker history 7fd0813c73b7
IMAGE CREATED CREATED BY SIZE COMMENT
7fd0813c73b7 6 minutes ago /bin/sh -c #(nop) CMD ["/bin/sh" "-c" "/bin… 0B
7734ee3e9c45 6 minutes ago /bin/sh -c #(nop) CMD ["/bin/sh" "-c" "echo… 0B
ab0898794eed 6 minutes ago /bin/sh -c #(nop) CMD ["/bin/sh" "-c" "echo… 0B
1b86c8105256 6 minutes ago /bin/sh -c #(nop) EXPOSE 80 0B
43bb774261da 6 minutes ago /bin/sh -c yum -y install net-tools 28.4MB
499ff2dac21a 6 minutes ago /bin/sh -c yum -y install vim 66.3MB
b48576244d52 7 minutes ago /bin/sh -c #(nop) WORKDIR /usr/local 0B
4db803d07f4f 7 minutes ago /bin/sh -c #(nop) ENV MYPATH=/usr/local 0B
4d291067eca1 7 minutes ago /bin/sh -c #(nop) MAINTAINER dqh<2634897499… 0B
5d0da3dc9764 3 months ago /bin/sh -c #(nop) CMD ["/bin/bash"] 0B
<missing> 3 months ago /bin/sh -c #(nop) LABEL org.label-schema.sc… 0B
<missing> 3 months ago /bin/sh -c #(nop) ADD file:805cb5e15fb6e0bb0… 231MB
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