Add sampleLimit to ServiceMonitor

charts/karpenter/README.md

@@ -90,6 +90,7 @@ cosign verify public.ecr.aws/karpenter/karpenter:1.8.1 \
 | serviceMonitor.endpointConfig | object | `{}` | Configuration on `http-metrics` endpoint for the ServiceMonitor. Not to be used to add additional endpoints. See the Prometheus operator documentation for configurable fields https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api-reference/api.md#endpoint |
 | serviceMonitor.metricRelabelings | list | `[]` | Metric relabelings for the `http-metrics` endpoint on the ServiceMonitor. For more details on metric relabelings, see: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#metric_relabel_configs |
 | serviceMonitor.relabelings | list | `[]` | Relabelings for the `http-metrics` endpoint on the ServiceMonitor. For more details on relabelings, see: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config |
+| serviceMonitor.sampleLimit | int | `nil` | Set a sampleLimit on the ServiceMonitor. By default, no limit is set. For more information, see: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#configuration-file |
 | settings | object | `{"batchIdleDuration":"1s","batchMaxDuration":"10s","clusterCABundle":"","clusterEndpoint":"","clusterName":"","disableClusterStateObservability":false,"disableDryRun":false,"eksControlPlane":false,"featureGates":{"nodeOverlay":false,"nodeRepair":false,"reservedCapacity":true,"spotToSpotConsolidation":false,"staticCapacity":false},"ignoreDRARequests":true,"interruptionQueue":"","isolatedVPC":false,"minValuesPolicy":"Strict","preferencePolicy":"Respect","reservedENIs":"0","vmMemoryOverheadPercent":0.075}` | Global Settings to configure Karpenter |
 | settings.batchIdleDuration | string | `"1s"` | The maximum amount of time with no new ending pods that if exceeded ends the current batching window. If pods arrive faster than this time, the batching window will be extended up to the maxDuration. If they arrive slower, the pods will be batched separately. |
 | settings.batchMaxDuration | string | `"10s"` | The maximum length of a batch window. The longer this is, the more pods we can consider for provisioning at one time which usually results in fewer but larger nodes. |

charts/karpenter/templates/servicemonitor.yaml

@@ -20,6 +20,9 @@ spec:
   selector:
     matchLabels:
       {{- include "karpenter.selectorLabels" . | nindent 6 }}
+  {{- if not (eq .Values.serviceMonitor.sampleLimit nil) }}
+  sampleLimit: {{ .Values.serviceMonitor.sampleLimit }}
+  {{- end }}
   endpoints:
     - port: http-metrics
       path: /metrics

charts/karpenter/values.yaml

@@ -40,6 +40,11 @@ serviceMonitor:
   # Not to be used to add additional endpoints.
   # See the Prometheus operator documentation for configurable fields https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api-reference/api.md#endpoint
   endpointConfig: {}
+  # -- Specifies the sampleLimit for prometheus scrapes.
+  # Per-scrape limit on the number of scraped samples that will be accepted.
+  # If more than this number of samples are present after metric relabeling
+  # the entire scrape will be treated as failed. 0 means no limit.
+  sampleLimit: null
 # -- Number of replicas.
 replicas: 2
 # -- The number of old ReplicaSets to retain to allow rollback.
@@ -218,7 +223,7 @@ settings:
     # Setting this to true will enable node repair.
     nodeRepair: false
     # -- nodeOverlay is ALPHA and is disabled by default.
-    # Setting this will allow the use of node overlay to impact scheduling decisions 
+    # Setting this will allow the use of node overlay to impact scheduling decisions
     nodeOverlay: false
     # -- reservedCapacity is BETA and is enabled by default.
     # Setting this will enable native on-demand capacity reservation support.