Brief docker tutorial (taking wget program installation as an example)

Plan:

• 1. Install docker (centos)
• 2. register an account on the official docker website
• 3. Download the basic centos image, install the required software and environment, and then push it to your Repository

 

1. Install docker (centos)

Select your own epel source in https://fedoraproject.org/wiki/EPEL#How_can_ I _use_these_extra_packages.3F.

Next, install docker-io:

$ sudo yum install docker-io

Start docker daemon:

$ sudo service docker start

Set docker to boot:

$ sudo chkconfig docker on

Download the latest Basic centos:

$ sudo docker pull centos:latest

Test whether centos runs successfully:

$ sudo docker images centos

2. register an account on the official docker website

Registering your own docker repository account is equivalent to opening up an image repository, equivalent to GitHub:

Https://hub.docker.com/account/signup/

3. Download others' images, make modifications, and push them to your own repository

The following is an example. After wget is installed in Image: centos, it is submitted to its own repository:

Enter the operation interface

[[email protected]113058 ~]# sudo docker run -i -t centos /bin/bashbash-4.2#

Install wget and exit after installation:

bash-4.2# yum install wgetbash-4.2#exit

View your modification records:

[[email protected]113058 ~]# docker ps -aCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES5f962b864221 centos:latest /bin/bash 2 minutes ago Exited (0) 42 seconds ago goofy_mcclintock 36f07f440c17 centos:latest /bin/bash 38 minutes ago Exited (0) 35 minutes ago boring_kowalevski 38e000fbee87 centos:latest /bin/bash 41 minutes ago Exited (127) 40 minutes ago sleepy_yonath

We can see that we recently submitted 5f962b864221, which is the image with wget installed and pushed it to our repository. There are three steps:

[[email protected]113058 ~]# docker commit 5f962b864221 alexknight/centos-wget

Alexknight is the name of the space opened in the warehouse. Next, you can log on to your account.

[[Email protected] 113058 ~] # Docker login-U "name registered in step 2"-P "passwd"-e "email address"

After logging on successfully, push your own submission

[[email protected]113058 ~]# docker push alexknight/centos-wget

If centos-wget is displayed on the page, the operation is successful.

Download the self-submitted centos-wget:

[[email protected]113058 ~]# docker pull alexknight/centos-wgetPulling repository alexknight/centos-wgetaa194d98cc9e: Download complete 511136ea3c5a: Download complete 34e94e67e63a: Download complete 1a7dc42f78ba: Download complete

When you enter your centos-wget for continuous submission again:

[[email protected]113058 ~]#sudo docker run -i -t alexknight/centos-wget /bin/bash