fix monitoring: show alerts only from first instance #521
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Signed-off-by: Andrei Kvapil <[email protected]>
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (1)
packages/extra/monitoring/templates/vm/vmalert.yaml (1)
21-21: Document single-instance monitoring decisionConsider adding a comment in the template to explain why alerts are only generated from the first metrics storage instance. This will help future maintainers understand the intentional limitation.
{{- range .Values.metricsStorages }} +{{/* Only generate VMAlert for the first metrics storage to prevent duplicate alerts */}} {{- break }} {{- end }}
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📒 Files selected for processing (1)
packages/extra/monitoring/templates/vm/vmalert.yaml(1 hunks)
🔇 Additional comments (1)
packages/extra/monitoring/templates/vm/vmalert.yaml (1)
21-21: Verify single-instance monitoring assumptions
The addition of the break statement ensures alerts come only from the first metrics storage instance, which aligns with the PR objective. However, please verify:
- Is the first instance in
.Values.metricsStoragesguaranteed to be the primary/correct instance for monitoring? - Are we certain that other instances don't monitor unique metrics that should trigger alerts?
✅ Verification successful
Let me gather more context about the metrics storage configuration and its usage.
Break statement in VMAlert template is appropriate and safe
The verification shows that the metrics storages are just different retention periods of the same metrics:
shortterm: 3 days retention with 5m deduplicationlongterm: 14 days retention with 15s deduplication
Since both instances store the same metrics with different retention policies, using only the first instance (shortterm) for alerting is correct. This prevents duplicate alerts while maintaining quick alert detection through the shorter deduplication interval of the first instance.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Check if metrics storage instances might monitor different metrics
# Look for any instance-specific metric configurations
rg -A 5 "metricsStorages.*metrics"
# Check if there are any comments or documentation about metrics storage hierarchy
rg -l "metricsStorages" | xargs rg "primary|master|replica|secondary"
Length of output: 2260
Script:
#!/bin/bash
# Check the full metrics storage configuration and template usage
cat packages/extra/monitoring/values.yaml | grep -A 15 "^metricsStorages:"
# Look for any documentation or comments about alert configuration
rg "vmalert" packages/extra/monitoring/README.md -A 5
# Check the complete vmalert template to understand the context
cat packages/extra/monitoring/templates/vm/vmalert.yaml
Length of output: 1253
We don't need to show alerts from longterm instance, because the alerts have shorter timeout than metrics collection interval
Summary by CodeRabbit
VMAlertYAML template to generate only the firstVMAlertresource based on metrics storage values.