docker 1.8+之后ubuntu安装指定版本docker-engine

这边记录ubuntu安装过程，首先是官网文档

If you haven’t already done so, log into your Ubuntu instance.

Open a terminal window.

Add the new gpg key.

$ apt-key adv --keyserver hkp://pgp.mit.edu:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

Open the /etc/apt/sources.list.d/docker.list file in your favorite editor.

If the file doesn’t exist, create it.

Remove any existing entries.

Add an entry for your Ubuntu operating system.

The possible entries are:

# Ubuntu Precise

deb https://apt.dockerproject.org/repo ubuntu-precise main

# Ubuntu Trusty

deb https://apt.dockerproject.org/repo ubuntu-trusty main

# Ubuntu Vivid

deb https://apt.dockerproject.org/repo ubuntu-vivid main

# Ubuntu Wily

deb https://apt.dockerproject.org/repo ubuntu-wily main

Save and close the /etc/apt/sources.list.d/docker.list file.

Update the apt package index.

$ apt-get update

Purge the old repo if it exists.

$ apt-get purge lxc-docker*

Verify that apt is pulling from the right repository.

$ apt-cache policy docker-engine

~# apt-cache policy docker-engine

docker-engine:

  Installed: 1.8.-~precise

  Candidate: 1.8.-~wily

  Version table:

     1.8.-~wily

         https://apt.dockerproject.org/repo/ ubuntu-wily/main amd64 Packages

     1.8.-~vivid

         https://apt.dockerproject.org/repo/ ubuntu-vivid/main amd64 Packages

     1.8.-~trusty

         https://apt.dockerproject.org/repo/ ubuntu-trusty/main amd64 Packages

 *** 1.8.-~precise

         https://apt.dockerproject.org/repo/ ubuntu-precise/main amd64 Packages

         /var/lib/dpkg/status

     1.8.-~wily

         https://apt.dockerproject.org/repo/ ubuntu-wily/main amd64 Packages

     1.8.-~vivid

         https://apt.dockerproject.org/repo/ ubuntu-vivid/main amd64 Packages

     1.8.-~trusty

         https://apt.dockerproject.org/repo/ ubuntu-trusty/main amd64 Packages

     1.8.-~precise

         https://apt.dockerproject.org/repo/ ubuntu-precise/main amd64 Packages

     1.8.-~wily

         https://apt.dockerproject.org/repo/ ubuntu-wily/main amd64 Packages

     1.8.-~vivid

         https://apt.dockerproject.org/repo/ ubuntu-vivid/main amd64 Packages

     1.8.-~trusty

         https://apt.dockerproject.org/repo/ ubuntu-trusty/main amd64 Packages

     1.8.-~precise

         https://apt.dockerproject.org/repo/ ubuntu-precise/main amd64 Packages

     1.8.-~wily

         https://apt.dockerproject.org/repo/ ubuntu-wily/main amd64 Packages

     1.8.-~vivid

         https://apt.dockerproject.org/repo/ ubuntu-vivid/main amd64 Packages

     1.8.-~trusty

         https://apt.dockerproject.org/repo/ ubuntu-trusty/main amd64 Packages

     1.8.-~precise

         https://apt.dockerproject.org/repo/ ubuntu-precise/main amd64 Packages

     1.7.-~wily

         https://apt.dockerproject.org/repo/ ubuntu-wily/main amd64 Packages

     1.7.-~vivid

         https://apt.dockerproject.org/repo/ ubuntu-vivid/main amd64 Packages

     1.7.-~trusty

         https://apt.dockerproject.org/repo/ ubuntu-trusty/main amd64 Packages

     1.7.-~precise

         https://apt.dockerproject.org/repo/ ubuntu-precise/main amd64 Packages

     1.7.-~vivid

         https://apt.dockerproject.org/repo/ ubuntu-vivid/main amd64 Packages

     1.7.-~trusty

         https://apt.dockerproject.org/repo/ ubuntu-trusty/main amd64 Packages

最后选定特定发行版的一个docker-engine版本进行安装即可

apt-get install -y docker-engine=1.8.-~precise

docker 1.8+之后ubuntu安装指定版本docker-engine的相关教程结束。