Itsi production PID file location

[jgnagy]

When running Itsi in production in Kubernetes, I'd like to run my Pod with:

securityContext:
  readOnlyRootFilesystem: true

When doing so, I see this in the logs and my container fails to start:

2025-08-23T16:41:15.392886Z ERROR itsi_server: {"msg":"Read-only file system @ rb_sysopen - .itsi.pid"}

Is there an option to tell Itsi where to write the PID file? I mount /tmp as an ephemeral volume specifically for this reason, but I can't figure out how to get Itsi to use it for the PID file.

[wouterken]

Hey @jgnagy

Please try using the environment variable ITSI_SERVER_PID_DIR, support for which was just released in the latest version (0.2.20).
(Failure to write server PID is also no longer a fatal error).