If you ever used PM2 in production or anywhere where its left unattended you might think all is good and dandy but appearances can be deceiving. I found out the hard way that PM2 can suck your hard disk dry. Purely because the logs keep writing and writing and when you have half a dozen microservices logging stuff every minute it can quickly add up to hard disk space.

Mitigation

So how do you deal with this? First and foremost pm2 provides a command called flush, so use that first to delete all logs pm2 flush.

Next to avoid this issue completely, lets use a pm2 addon call pm2-logrotate. Its a classic log rotate mechanism which deletes past log message after passing a certain threshold i.e after passing 10mb in size.

Installing pm2-logrotate

PM2 makes it really easy to add addons - all you have to do is run the following:

pm2 install pm2-logrotate

and you are done. Feel free to explore configuration options here

Conclusion

PM2 is a really great process manager but you have to be aware of its little quirks before going in production.

Note to self: logging can be a real pain in the *rse if left unattended.