How to clean Docker container logs?

Question

I read my Docker container log output using

docker logs -f 

I log lots of data to the log in my node.js app via call

Answer 1

In order to do this on OSX, you need to get to the virtual machine the Docker containers are running in.

You can use the walkerlee/nsenter image to run commands inside the VM like so:

docker run --rm -it --privileged --pid=host walkerlee/nsenter -t 1 -m -u -i -n sh

Combining that with a simplified version of the accepted answer you get:

#!/bin/sh
docker run --rm -it --privileged --pid=host walkerlee/nsenter -t 1 -m -u -i -n \
    cp /dev/null $(docker inspect -f '{{.LogPath}}' $1)

Save it, chmod +x it, run it.

As far as I can tell this doesn't require the container to be stopped. Also, it clears out the log file (instead of deleting it) avoiding errors when doing docker logs right after cleanup.