how to update docker in coreos

Question

I typed docker version into a newly provisioned coreos instant on ec2 and I got this message

Client version: 0.6.3
Go version (client): go1.1.2
Git commit (client): b0a49a3
Server version: 0.6.3
Git commit (server): b0a49a3
Go version (server): go1.1.2
Last stable version: 0.7.3, please update docker

how do I update docker?

Stokeontrent

You should update the image. If you did not create the image you're using, speak to the folks that made it./ – Giro

Answer 1

CoreOS and the tools it ships are updated automatically as new versions come out.

The CoreOS version on the EC2 marketplace is always a few versions behind, but if you wait a few minutes after booting a machine it should execute an auto-update and then be up to date.

If you want to manually run a new docker binary before it is updated in CoreOS, you can download the binary and run a local docker unit file: https://gist.github.com/philips/7555876

Sewellel

Generally speaking, you should inline the relevant content from links into your answer (especially in cases like this, where the link kinda/sorta answers the original question, but needs relatively simple adaptation to be a direct and comprehensive answer to the question). Just a thought! (= – Linguist

Answer 2

To update CoreOS manually type in your shell:

update_engine_client -update

Kaunas

The title of the question is "how to update docker in coreos." Using this command will not update the version of docker included with your CoreOS install unless there is a more recent release of CoreOS on the channel that you're on. Have a look at the CoreOS releases page in order to ascertain what versions of key container runtimes are included with the various channels. – Tieck