Ubuntu – Directory in /var/run gets deleted after hard reboot

pidUbuntu

I keep my sphinx pid in /var/run/sphinx/searchd.pid but every time I hard reboot the directory /var/run/sphinx disappears and sphinx fails to start. Is there a way to make that directory stick or have it automatically created? How do people usually handle this situation? I use Ubuntu Hardy

Best Answer

That directory is ephemeral by design. If its contents stuck around across boots, all sorts of ugly effects could occur, as control scripts of various sorts look in there to see what processes they should be signaling. On recent system, this temporary nature is enforced by mounting /var/run as tmpfs, while older systems just deleted everything in the directory at startup.

Therefore, you need to configure Sphinx or its startup script to create that directory, or just write the PID file in /var/run directly.

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Nginx won’t start at boot

For some strange reason, the directory of the logs wasn't mounted at the time that nginx tried to start (during the boot). Changed the log files to another location and worked.

Nginx – Why is /run/nginx.pid disappearing? simply disappears from the system everyday

First try: pkill nginx && service nginx restart

If the file still gets deleted, then you can use ftrace to find which process is deleting your file:

trace-cmd record -e \*unlink\*

Wait for the file to be deleted, press CTRL+C to stop trace-cmd record ..., then run:

trace-cmd report

Also make sure that pid in /usr/lib/systemd/system/nginx.service or /etc/systemd/system/nginx.service files is pointing to the same file as in /etc/nginx/nginx.conf

Best Answer

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