fix: concurrent update-core and update-module runs#1176
Open
DavidePrincipi wants to merge 1 commit into
Open
Conversation
Software update procedures must be protected from concurrent runs to avoid unexpected behaviors, like sudden service restarts. Use fcntl flock to ensure only one action runs at a time. If the lock cannot be acquired, the action fails immediately with a validation-failed status. The lock is enforced by the kernel and is implicitly released when the process terminates, no matter its exit code. The rendez-vous file is created only if it not exists (O_CREAT flag).
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Software update procedures must be protected from concurrent runs to avoid unexpected behaviors, like sudden service restarts.
Use fcntl flock to ensure only one action runs at a time. If the lock cannot be acquired, the action fails immediately with a validation-failed status.
The lock is enforced by the kernel and is implicitly released when the process terminates, no matter its exit code. The rendez-vous file is created only if it not exists (O_CREAT flag).
Refs NethServer/dev#7877