G. NGCP Internals

This chapter documents internals of Sipwise C5 that should not be usually needed, but might be helpful to understand the overall system.

1. Pending reboot marker

The Sipwise C5 has the ability to mark a pending reboot for any server, using the file /var/run/reboot-required. As soon as the file exists, several components will report about a pending reboot to the end-user. The following components report about a pending reboot right now: ngcp-status, ngcpcfg status, motd, ngcp-upgrade. Also, ngcp-upgrade will NOT allow proceeding with an upgrade if it notices a pending reboot. It might affect rtpengine dkms module building if there is a pending reboot requested by a newly installed kernel, etc.