Upgrading Docker on Amazon Linux AMI

If you're using the EC2 Container service, the AWS ECS-optimized AMI (2015.09.b) is running docker-1.7.1 as of this writing. A post in the AWS forums states "[AWS is] testing 1.9 RC and plan to deliver it this month."

To expand on Hzmy's answer, here's how to upgrade Docker to 1.9.0 in an SSH session:

service docker stop
cp /usr/bin/docker /usr/bin/docker.old
curl -o /usr/bin/docker https://get.docker.com/builds/Linux/x86_64/docker-1.9.0
service docker start

If you're using CloudFormation templates, here's a command you can drop in your AWS::Cloudformation::Init:

...
"commands": {
    ...,
    "03_upgrade_docker_for_log_driver_support": {
        "command": {
            "Fn::Join": [
                "",
                [
                    "#!/bin/bash -xe\n",
                    "service docker stop\n",
                    "cp /usr/bin/docker /usr/bin/docker.old\n",
                    "curl -o /usr/bin/docker https://get.docker.com/builds/Linux/x86_64/docker-1.8.3\n",
                    "service docker start\n"
                ]
            ]
        }
    }
    ...
}
...

Maybe not the cleanest, but it seems to work for me.

I ended up installing the Amazon Linux docker package and then overwriting the /usr/bin/docker binary with the 1.8.2 version binary from: https://docs.docker.com/installation/binaries/.

Not exactly elegant - but all of the dependencies are the same, and seeing as my AMI is immutable the package won't be upgraded on top of the current image.