Assign labels to Docker daemon

Question

How do I assign labels to an already running Docker daemon on Ubuntu?

Tried:

export DOCKER_OPTS="--label=com.example.storage=ssd"
sudo restart docker

but didn't help. docker info need to show Labels.

Answer 1

The docker configuration section is clear:

• Log into your host as a user with sudo or root privileges.
• If you don’t have one, create the /etc/default/docker file on your host. Depending on how you installed Docker, you may already have this file.
• Open the file with your favorite editor.

    $ sudo vi /etc/default/docker

• Add a DOCKER_OPTS variable with the following options. These options are appended to the docker daemon’s run command.

    DOCKER_OPTS="--label=com.example.storage=ssd"

• Save and close the file.
• Restart the docker daemon.

    $ sudo restart docker

Answer 2

sudo sed -i `'/DOCKER_OPTS/c\DOCKER_OPTS="--label=com.example.storage=ssd"' /etc/default/docker`

did the trick for me.