How Do I upgrade Docker

I type docker.io version, and get:

Client version: 0.9.1
Go version (client): go1.2.1
Git commit (client): 3600720
Server version: 0.9.1
Git commit (server): 3600720
Go version (server): go1.2.1
Last stable version: 0.11.1, please update docker

I follow that with an apt-get update, then either: apt-get upgrade, or apt-get upgrade docker.io, but all it gives me is:

docker.io is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

I'm running Ubuntu 14.04 (trusty) 64bit server.

EDIT: I think I used a script in this Post comment to install docker (since it purported to allow me to just type docker instead of docker.io)

Solution 1:

Suppose it is Ubuntu Trusty (14.04) release, which has 0.9.1 officially

Update again in 2017/03/07 to reflect to the changes in new release, see https://blog.docker.com/2017/03/docker-enterprise-edition/

Official guideline is here Install docker for Ubuntu, old release had different package name.

• docker.io: is used to be very old version in default ubuntu repo (can skip here)
• docker-engine: is used before release 1.13.x
• docker-ce: since 17.03

for docker-engine

# add the new gpg key
$ sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
# add new repo
$ sudo add-apt-repository \
  "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) \
  stable"

Then you can smoothly upgrade to latest docker version

$ sudo apt-get update

# remove the old
$ sudo apt-get purge lxc-docker*

# install the new
$ sudo apt-get install docker-engine

And in the case that you don't want to install latest package then you can do something like below.

$ sudo apt-get install docker-engine=1.7.1-0~trusty

for docker-ce

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo add-apt-repository \
  "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) \
  stable"
$ sudo apt-get update
$ sudo apt-get install docker-ce

Solution 2:

Warning: Since this is an older Post, please use to official resources to prevent issues: https://www.docker.com/community-edition#/download

One way to upgrade to the latest version (without installing from source) is to use the instructions here provided by Digital Ocean:

1. Add docker repository key to apt-key for package verification

   sudo sh -c "wget -qO- https://get.docker.io/gpg | apt-key add -"

2. Add the docker repository to aptitude sources:

   sudo sh -c "echo deb http://get.docker.io/ubuntu docker main\ > /etc/apt/sources.list.d/docker.list"

3. Update the repository with the new addition:

   sudo aptitude update

4. Finally, download and install docker:

   sudo aptitude install lxc-docker