Docker Debugging a container Printing the logs
Example
Following the logs is the less intrusive way to debug a live running application. This example reproduces the behavior of the traditional tail -f some-application.log on container 7786807d8084.
docker logs --follow --tail 10 7786807d8084
This command basically shows the standard output of the container process (the process with pid 1).
If your logs do not natively include timestamping, you may add the --timestamps flag.
It is possible to look at the logs of a stopped container, either
-
start the failing container with
docker run ... ; docker logs $(docker ps -lq) -
find the container id or name with
docker ps -a
and then
docker logs container-id
or
docker logs containername
as it is possible to look at the logs of a stopped container
