Add alert for high TCP memory utilization on nodes #213
Conversation
This file contains 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
The alert doesn't have a label `node`, use `instance` instead which contains the node name.
We alert when a node's TCP memory utilization exceeds 6.25% of the node's total memory. This matches the threshold configured by RHEL8/RHEL9 for the kernel's TCP memory pressure threshold.
simu
force-pushed
the
feat/node-tcp-memory-alert
branch
from
99757f0 to
bdb1718
Compare
simu
force-pushed
the
feat/node-tcp-memory-alert
branch
from
bdb1718 to
9a2cef9
Compare
|
Runbook is a bit of a brain-dump from myself. Feel free to suggest structure improvements. |
DebakelOrakel
approved these changes
Aug 15, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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Outdated suggestions cannot be applied.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.
Add alert which fires when TCP memory utilization on a node exceeds the configured kernel-level TCP memory "pressure" threshold. (6.25% on RHEL8/RHEL9). Add an alert runbook which contains all the debugging snippets we've discovered so far.
Checklist
changelog.
The PR has a meaningful description that sums up the change. It will be
linked in the changelog.
bug,enhancement,documentation,change,breaking,dependencyas they show up in the changelog.