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 | ||||
| Level | Trivial Change | ||||
| Class | Bug Fix | ||||
| Compatibility | Compatible - no manual interaction needed | ||||
| Checkmk versions & editions |
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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.