feat(helm): port "compactor not run" alert from mixin

docs/sources/setup/install/helm/reference.md

@@ -8042,6 +8042,11 @@ false
         "severity": "warning",
         "threshold": 5
       },
+      "LokiCompactorHasNotSuccessfullyRunCompaction": {
+        "enabled": true,
+        "for": "1h",
+        "severity": "critical"
+      },
       "LokiRequestErrors": {
         "enabled": true,
         "for": "15m",
@@ -8180,6 +8185,11 @@ null
       "severity": "warning",
       "threshold": 5
     },
+    "LokiCompactorHasNotSuccessfullyRunCompaction": {
+      "enabled": true,
+      "for": "1h",
+      "severity": "critical"
+    },
     "LokiRequestErrors": {
       "enabled": true,
       "for": "15m",

production/helm/loki/CHANGELOG.md

@@ -13,6 +13,7 @@ Entries should include a reference to the pull request that introduced the chang
 
 ## Unreleased
 
+- [FEATURE] Add compaction not run alert rules. [#19901](https://github.com/grafana/loki/pull/19901)
 - [ENHANCEMENT] Use fsGroupChangePolicy=OnRootMismatch on loki to speed up pod starts [#13942](https://github.com/grafana/loki/pull/13942)
 
 ## 6.46.0

production/helm/loki/src/alerts.yaml.tpl

@@ -87,6 +87,50 @@ groups:
       {{- end }}
 {{- end }}
 
+{{- if and (not .disabled.LokiCompactorHasNotSuccessfullyRunCompaction) .configs.LokiCompactorHasNotSuccessfullyRunCompaction.enabled }}
+      {{- with .configs.LokiCompactorHasNotSuccessfullyRunCompaction }}
+      - alert: "LokiCompactorHasNotSuccessfullyRunCompaction"
+        annotations:
+          message: |
+            {{`{{`}} $labels.cluster {{`}}`}} {{`{{`}} $labels.namespace {{`}}`}} has not run compaction in the last 3 hours since the last compaction. This may indicate a problem with the compactor.
+          {{- with $additionalAnnotations }}
+          {{- toYaml . | nindent 10 }}
+          {{- end }}
+        expr: |
+          min (
+            time() - (loki_boltdb_shipper_compact_tables_operation_last_successful_run_timestamp_seconds{} > 0)
+          )
+          by (cluster, namespace)
+          > 60 * 60 * 3
+        for: {{ .for }}
+        labels:
+          severity: {{ .severity }}
+          {{- with $additionalLabels }}
+          {{ toYaml . | nindent 10 }}
+          {{- end }}
+      - alert: "LokiCompactorHasNotSuccessfullyRunCompaction"
+        annotations:
+          message: |
+            {{`{{`}} $labels.cluster {{`}}`}} {{`{{`}} $labels.namespace {{`}}`}} has not run compaction in the last 3h since startup. This may indicate a problem with the compactor.
+          {{- with $additionalAnnotations }}
+          {{- toYaml . | nindent 10 }}
+          {{- end }}
+        expr: |
+          max(
+            max_over_time(
+              loki_boltdb_shipper_compact_tables_operation_last_successful_run_timestamp_seconds{}[3h]
+            )
+          ) by (cluster, namespace)
+          == 0
+        for: {{ .for }}
+        labels:
+          severity: {{ .severity }}
+          {{- with $additionalLabels }}
+          {{ toYaml . | nindent 10 }}
+          {{- end }}
+      {{- end }}
+{{- end }}
+
 {{- if and (not .disabled.LokiCanaryLatency) .configs.LokiCanaryLatency.enabled }}
   {{- with .configs.LokiCanaryLatency }}
   - name: "loki_canaries_alerts"

production/helm/loki/values.yaml

@@ -4115,6 +4115,10 @@ monitoring:
         enabled: true
         for: 5m
         severity: warning
+      LokiCompactorHasNotSuccessfullyRunCompaction:
+        enabled: true
+        for: 1h
+        severity: critical
       LokiCanaryLatency:
         enabled: true
         for: 15m