feat(helm): add pdb for compactor

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

@@ -2273,6 +2273,7 @@ null
   },
   "initContainers": [],
   "livenessProbe": {},
+  "maxUnavailable": null,
   "nodeSelector": {},
   "persistence": {
     "annotations": {},
@@ -2446,6 +2447,15 @@ null
 			<td><pre lang="json">
 {}
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>compactor.maxUnavailable</td>
+			<td>string</td>
+			<td>Pod Disruption Budget maxUnavailable</td>
+			<td><pre lang="json">
+null
+</pre>
 </td>
 		</tr>
 		<tr>

production/helm/loki/distributed-values.yaml

@@ -42,7 +42,8 @@ distributor:
   replicas: 3
   maxUnavailable: 2
 compactor:
-  replicas: 1
+  replicas: 2
+  maxUnavailable: 1
 indexGateway:
   replicas: 2
   maxUnavailable: 1

production/helm/loki/templates/compactor/poddisruptionbudget-compactor.yaml

@@ -0,0 +1,21 @@
+{{- $isDistributed := eq (include "loki.deployment.isDistributed" .) "true" -}}
+{{- if and $isDistributed (gt (int .Values.compactor.replicas) 1) }}
+{{- if kindIs "invalid" .Values.compactor.maxUnavailable }}
+{{- fail "`.Values.compactor.maxUnavailable` must be set when `.Values.compactor.replicas` is greater than 1." }}
+{{- else }}
+apiVersion: {{ include "loki.pdb.apiVersion" . }}
+kind: PodDisruptionBudget
+metadata:
+  name: {{ include "loki.compactorFullname" . }}
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "loki.compactorLabels" . | nindent 4 }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "loki.compactorSelectorLabels" . | nindent 6 }}
+  {{- with .Values.compactor.maxUnavailable }}
+  maxUnavailable: {{ . }}
+  {{- end }}
+{{- end }}
+{{- end }}

production/helm/loki/values.yaml

@@ -2395,6 +2395,8 @@ compactor:
             matchLabels:
               app.kubernetes.io/component: compactor
           topologyKey: kubernetes.io/hostname
+  # -- Pod Disruption Budget maxUnavailable
+  maxUnavailable: null
   # -- Labels for compactor service
   serviceLabels: {}
   # -- Annotations for compactor service