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.