Where are the docker daemon logs stored on ubuntu 16.04 xenial xerus?

Question

I expected to find the logs in /var/log/upstart or /var/lib/docker but had no such luck. I'm trying to debug a docker-compose issue and it'd be extremely helpful to know what API calls are being made behind the scenes.

Answer 1

You can check these places:

• journalctl -u docker for docker logs in the systemd journal
• journalctl | grep docker for system logs that mention docker
• docker logs CONTAINER for logs of a container named CONTAINER

Answer 2

And to tail it you can use the following :

journalctl -u docker -n -f