feat(ruler): add limit to list-rules API - #7785
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Thanks @kylestang. The code looks solid. |
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This commit adds a limit to the number of rules returned by the ListRules prometheus API, after which the API will truncate the result and return a pagination token for the next page. If a single rule group is larger than the max, that rule group will still be returned. This is being implemented after we found that JSON serializing a very large number of rules massively spikes the ruler CPU, which causes issues with rule evaluations and request timeouts. Signed-off-by: Kyle Stang <kylestng@amazon.com>
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This commit adds a limit to the number of rules returned by the ListRules prometheus API, after which the API will truncate the result and return a pagination token for the next page. If a single rule group is larger than the max, that rule group will still be returned.
This is being implemented after we found that JSON serializing a very large number of rules massively spikes the ruler CPU, which causes issues with rule evaluations and request timeouts.
What this PR does:
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX]docs/configuration/v1-guarantees.mdupdated if this PR introduces experimental flags