Use CentOS 6.5 to create a Docker image for Ubuntu 12.04

Use CentOS 6.5 to create a Docker image for Ubuntu 12.04

For how to install Docker on CentOS, see:

In the previous article, we created a CentOS image. This time we will create a Ubuntu image on CentOS.

The method is as follows:

Root:

Yum-y install debootstrap

Cd/home/admin/

First execution:

Debootstrap -- arch amd64 precise ubuntu-precise http://mirrors.163.com/ubuntu/

Error: no such script/usr/share/debootstrap/scripts/precise
Solution:
Ln-s/usr/share/debootstrap/scripts/gutsy/usr/share/debootstrap/scripts/precise

Execute again:

Debootstrap -- arch amd64 precise ubuntu-precise http://mirrors.163.com/ubuntu/

Modify permissions:

Chown-R admin. admin ubuntu-precise

Switch to admin user:

Su admin

[Admin @ localhost ~] $ Cd ubuntu-precise/

Create a ubuntu Image

[Admin @ localhost ubuntu-precise] $ tar-c .. | docker import-ubuntu1204-base
Bytes

View the image:

[Admin @ localhost ubuntu-precise] $ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
Ubuntu1204-base latest 43ad1b1116dd About a minute ago 172.7 Mbit/s
Centos63-bash latest d2ecedd2b5ed About an hour ago 306.7 Mbit/s

Create an ubuntu container:

[Admin @ localhost ubuntu-precise] $ docker run-t-I ubuntu1204-base/bin/bash
Root @ 8053e2ca797b:/# pwd
/
Root @ 8053e2ca797b:/# exit
Exit

View the current container:

[Admin @ localhost ubuntu-precise] $ docker ps-
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8053e2ca797b ubuntu1204-base: latest/bin/bash 31 seconds ago Exited (0) 2 seconds ago thirsty_thompson
14c9afaf2f06 centos63-bash: latest/bin/bash About an hour ago Exited (0) About an hour ago insane_lalande

Restart and enter the ubuntu container:

[Admin @ localhost ubuntu-precise] $ docker start 8053e2ca797b
8053e2ca797b
[Admin @ localhost ubuntu-precise] $ docker attach 8053e2ca797b
Root @ 8053e2ca797b:/# ls
Bin dev home lib64 mnt proc run selinux sys usr
Boot etc lib media opt root sbin srv tmp var

The basic Ubuntu image running in Docker is created successfully.

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