feat(helm): add PDB for patternIngester (#17058)

Signed-off-by: drfaust92 <[email protected]>
Co-authored-by: Jay Clifford <[email protected]>

Author: DrFaust92

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

@@ -8186,6 +8186,7 @@ null
   },
   "initContainers": [],
   "livenessProbe": {},
+  "maxUnavailable": null,
   "nodeSelector": {},
   "persistence": {
     "annotations": {},
@@ -8360,6 +8361,15 @@ null
 			<td><pre lang="json">
 {}
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>patternIngester.maxUnavailable</td>
+			<td>string</td>
+			<td>Pod Disruption Budget maxUnavailable</td>
+			<td><pre lang="json">
+null
+</pre>
 </td>
 		</tr>
 		<tr>

production/helm/loki/templates/pattern-ingester/poddisruptionbudget-pattern-ingester.yaml

@@ -0,0 +1,17 @@
+{{- $isDistributed := eq (include "loki.deployment.isDistributed" .) "true" -}}
+{{- if and $isDistributed (gt (int .Values.patternIngester.replicas) 1) }}
+apiVersion: {{ include "loki.pdb.apiVersion" . }}
+kind: PodDisruptionBudget
+metadata:
+  name: {{ include "loki.patternIngesterFullname" . }}
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "loki.patternIngesterLabels" . | nindent 4 }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "loki.patternIngesterSelectorLabels" . | nindent 6 }}
+  {{- with .Values.patternIngester.maxUnavailable }}
+  maxUnavailable: {{ . }}
+  {{- end }}
+{{- end }}

production/helm/loki/values.yaml

@@ -2890,6 +2890,8 @@ patternIngester:
             matchLabels:
               app.kubernetes.io/component: pattern-ingester
           topologyKey: kubernetes.io/hostname
+  # -- Pod Disruption Budget maxUnavailable
+  maxUnavailable: null
   # -- Labels for pattern ingester service
   serviceLabels: {}
   # -- Annotations for pattern ingester service