[chuckadams]

Files in /dev/shm go away on reboot. Using a PID file at all in kubernetes is kind of odd (containerized things tend to run in the foreground as PID 1), but given squid's age, I imagine it requires it.

[xorcist]

Running squid in the foreground is "-N". It's not hard to find, there is a manpage and everything (ooh, ancient).