tail -f /var/log/my-application.log

Problem

One thing that always bothered me was that I couldn't get logs of several pods at once with kubectl. A simple tail -f <path-to-logfile> isn't possible at all. Certainly, you can use kubectl logs -f <pod-id>, but it doesn't help if you want to monitor more than one pod at a time.

This is something you really need a lot, at least if you run several instances of a pod behind a deployment. This is even more so if you don't have a Kibana or a similar setup.

Solution

Luckily, there are smart developers out there who always come up with solutions. The finding of the week is a small bash script that allows you to aggregate log files of several pods at the same time in a simple way. The script is called kubetail and is available at GitHub.