feat(loki-bootstrap): add VPA support for querier component

Adds VerticalPodAutoscaler configuration for loki-querier deployment
to prevent OOMKills during large queries.

Author: loafoe

charts/loki-bootstrap/Chart.yaml

@@ -1,4 +1,4 @@
 apiVersion: v2
 name: loki-bootstrap
-version: 0.36.0
+version: 0.37.0
 description: A Helm chart for bootstrapping Loki

charts/loki-bootstrap/README.md

@@ -1,6 +1,6 @@
 # loki-bootstrap
 
-![Version: 0.34.0](https://img.shields.io/badge/Version-0.34.0-informational?style=flat-square)
+![Version: 0.37.0](https://img.shields.io/badge/Version-0.37.0-informational?style=flat-square)
 
 ## Values
 
@@ -18,6 +18,20 @@
 | initOverrides.tag | string | `"1.37.0"` |  |
 | lokiChart.version | string | `"6.55.0"` |  |
 | multitenancyEnabled | bool | `true` |  |
+| vpa.components.distributor.enabled | bool | `true` |  |
+| vpa.components.distributor.maxAllowed.memory | string | `"4Gi"` |  |
+| vpa.components.distributor.minAllowed.memory | string | `"512Mi"` |  |
+| vpa.components.ingester.enabled | bool | `true` |  |
+| vpa.components.ingester.maxAllowed.memory | string | `"16Gi"` |  |
+| vpa.components.ingester.minAllowed.memory | string | `"4Gi"` |  |
+| vpa.components.patternIngester.enabled | bool | `true` |  |
+| vpa.components.patternIngester.maxAllowed.memory | string | `"4Gi"` |  |
+| vpa.components.patternIngester.minAllowed.memory | string | `"256Mi"` |  |
+| vpa.components.querier.enabled | bool | `true` |  |
+| vpa.components.querier.maxAllowed.memory | string | `"8Gi"` |  |
+| vpa.components.querier.minAllowed.memory | string | `"512Mi"` |  |
+| vpa.enabled | bool | `false` |  |
+| vpa.updateMode | string | `"InPlace"` |  |
 
 ----------------------------------------------
 Autogenerated from chart metadata using [helm-docs v1.14.2](https://github.com/norwoodj/helm-docs/releases/v1.14.2)

charts/loki-bootstrap/templates/vpa.yaml

@@ -142,6 +142,36 @@ spec:
           {{- toYaml . | nindent 10 }}
           {{- end }}
         controlledResources: ["memory"]
+---
+{{- end }}
+
+{{- if .Values.vpa.components.querier.enabled }}
+apiVersion: autoscaling.k8s.io/v1
+kind: VerticalPodAutoscaler
+metadata:
+  name: loki-querier
+  namespace: loki-system
+  labels:
+    {{- include "loki-bootstrap.labels" . | nindent 4 }}
+spec:
+  targetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: loki-querier
+  updatePolicy:
+    updateMode: {{ $updateMode }}
+  resourcePolicy:
+    containerPolicies:
+      - containerName: querier
+        minAllowed:
+          {{- with .Values.vpa.components.querier.minAllowed }}
+          {{- toYaml . | nindent 10 }}
+          {{- end }}
+        maxAllowed:
+          {{- with .Values.vpa.components.querier.maxAllowed }}
+          {{- toYaml . | nindent 10 }}
+          {{- end }}
+        controlledResources: ["memory"]
 {{- end }}
 
 {{- end }}

charts/loki-bootstrap/values.yaml

@@ -63,3 +63,9 @@ vpa:
         memory: 512Mi
       maxAllowed:
         memory: 4Gi
+    querier:
+      enabled: true
+      minAllowed:
+        memory: 512Mi
+      maxAllowed:
+        memory: 8Gi