Collecting data from a container

One feature that would be exceedingly helpful for clinic would be the ability to run it against a node process running within a container. Not yet entirely sure how that would work seamlessly, but wanted to at least open a tracking issue.

For example:

$ clinic doctor -- docker run myApp

[dam1r89]

Assuming that you’ve changed start script to run clinic, you have to send SIGINT to the clinic to make it stop gracefully and to generate reports.

I’m using docker-compose so this is how I did it:

Connect to running instance docker-compose exec node bash then type ps x and find process PID of the clinic. Something like node /app/node_modules/.bin/clinic flame -- node dist/server.js.

Then send the stop signal with kill -SIGINT <PID> and do it twice. Then it will stop in few seconds and generate reports.

Hope this helps somebody.

[goto-bus-stop]

The SIGINT thing is correct—you can also run clinic using the timeout command-line tool to automatically stop after a certain time:

# start.sh
timeout --signal=SIGINT 20s clinic doctor -- node server.js

# Dockerfile
CMD ["/bin/bash", "./start.sh"]