Werk #4499: Agent Updater: Prevent broken state files caused by incomplete writes

Component Agent bakery
Title Agent Updater: Prevent broken state files caused by incomplete writes
Date Mar 15, 2017
Checkmk Edition Checkmk Enterprise (CEE)
Checkmk Version 1.4.0b4 1.5.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

When the agent updater is being executed it writes it's current deployment state to a state file. When the system is turned of suddenly it could cause a file corruption of the cmk-update-agent.state file. We prevent this now by writing to a temporary file first, flush it and then move it over to the state file path.

To the list of all Werks