Finding a string in docker logs of container

Question

What is the best way to find a specific string in the logs of a docker container? Let\'s say I want to see all requests, that are made in the \"nginx\" docker image that came fr

Answer 1

First, use this command ( b1e3c456f07f is the container id ):

docker inspect --format='{{.LogPath}}' b1e3c456f07f

The result will be something like this:

/var/lib/docker/containers/b1e3c456f07f2cb3ae79381ada33a034041a10f65174f52bc1792110b36fb767/b1e3c456f07f2cb3ae79381ada33a034041a10f65174f52bc1792110b36fb767-json.log

Second, use this command ( you can use vim if you like ):

nano /var/lib/docker/containers/b1e3c456f07f2cb3ae79381ada33a034041a10f65174f52bc1792110b36fb767/b1e3c456f07f2cb3ae79381ada33a034041a10f65174f52bc1792110b36fb767-json.log

Answer 2

I generally use it with -f option as well, when I am debugging the issue

docker logs -f nginx 2>&1 | grep "127."

It will show us, what we are expecting in real-time.