feat(helm): Add health probes to pattern-ingester

Adds configurable `livenessProbe` and `startupProbe` to the
pattern-ingester container in the pattern-ingester pods.

reference.md was generated via this command:

```shell
docker run -it --rm -v "$(pwd):/go" --entrypoint bash -e BUILD_IN_CONTAINER=false grafana/loki-build-image:0.34.7.1 -c 'git config --global --add safe.directory /go; make -BC docs sources/setup/install/helm/reference.md'
```

Signed-off-by: Andreas Lindhé <[email protected]>

Author: lindhe

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

@@ -9390,6 +9390,7 @@ null
   },
   "serviceAnnotations": {},
   "serviceLabels": {},
+  "startupProbe": {},
   "terminationGracePeriodSeconds": 30,
   "tolerations": [],
   "topologySpreadConstraints": []
@@ -9546,7 +9547,7 @@ null
 		<tr>
 			<td>patternIngester.livenessProbe</td>
 			<td>object</td>
-			<td>liveness probe settings for ingester pods. If empty use `loki.livenessProbe`</td>
+			<td>liveness probe settings for pattern ingester pods. If empty use `loki.livenessProbe`</td>
 			<td><pre lang="json">
 {}
 </pre>
@@ -9683,7 +9684,7 @@ null
 		<tr>
 			<td>patternIngester.readinessProbe</td>
 			<td>object</td>
-			<td>readiness probe settings for ingester pods. If empty, use `loki.readinessProbe`</td>
+			<td>readiness probe settings for pattern ingester pods. If empty, use `loki.readinessProbe`</td>
 			<td><pre lang="json">
 {}
 </pre>
@@ -9759,6 +9760,15 @@ null
 			<td><pre lang="json">
 {}
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>patternIngester.startupProbe</td>
+			<td>object</td>
+			<td>startup probe settings for pattern ingester pods. If empty use `loki.startupProbe`</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>

production/helm/loki/CHANGELOG.md

@@ -20,6 +20,7 @@ Entries should include a reference to the pull request that introduced the chang
 - [ENHANCEMENT] Add support for configuring `volumeAttributesClassName` for `volumeClaimTemplates`. [#19719](https://github.com/grafana/loki/pull/19719)
 - [BUGFIX] Don't fail for missing bucket name, if minio is enabled. [#19745](https://github.com/grafana/loki/pull/19745)
 - [BUGFIX] Add startupProbe to read pod [#19708](https://github.com/grafana/loki/pull/19708)
+- [ENHANCEMENT] Add configurable `livenessProbe` and `startupProbe` to pattern-ingester [#20080](https://github.com/grafana/loki/pull/20080)
 
 ## 6.46.0
 

production/helm/loki/templates/pattern-ingester/_helpers-pattern-ingester.tpl

@@ -21,6 +21,16 @@ pattern ingester selector labels
 app.kubernetes.io/component: pattern-ingester
 {{- end }}
 
+{{/*
+pattern ingester livenessProbe
+*/}}
+{{- define "loki.patternIngester.livenessProbe" }}
+{{- with .Values.patternIngester.livenessProbe | default .Values.loki.livenessProbe }}
+livenessProbe:
+  {{- toYaml . | nindent 2 }}
+{{- end }}
+{{- end }}
+
 {{/*
 pattern ingester readinessProbe
 */}}
@@ -31,6 +41,16 @@ readinessProbe:
 {{- end }}
 {{- end }}
 
+{{/*
+pattern ingester startupProbe
+*/}}
+{{- define "loki.patternIngester.startupProbe" }}
+{{- with .Values.patternIngester.startupProbe | default .Values.loki.startupProbe }}
+startupProbe:
+  {{- toYaml . | nindent 2 }}
+{{- end }}
+{{- end }}
+
 {{/*
 pattern ingester priority class name
 */}}

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

@@ -103,7 +103,9 @@ spec:
           {{- end }}
           securityContext:
             {{- toYaml .Values.loki.containerSecurityContext | nindent 12 }}
+          {{- include "loki.patternIngester.livenessProbe" . | nindent 10 }}
           {{- include "loki.patternIngester.readinessProbe" . | nindent 10 }}
+          {{- include "loki.patternIngester.startupProbe" . | nindent 10 }}
           volumeMounts:
             - name: temp
               mountPath: /tmp

production/helm/loki/values.yaml

@@ -3225,10 +3225,12 @@ patternIngester:
   extraVolumeMounts: []
   # -- Volumes to add to the pattern ingester pods
   extraVolumes: []
-  # -- readiness probe settings for ingester pods. If empty, use `loki.readinessProbe`
+  # -- readiness probe settings for pattern ingester pods. If empty, use `loki.readinessProbe`
   readinessProbe: {}
-  # -- liveness probe settings for ingester pods. If empty use `loki.livenessProbe`
+  # -- liveness probe settings for pattern ingester pods. If empty use `loki.livenessProbe`
   livenessProbe: {}
+  # -- startup probe settings for pattern ingester pods. If empty use `loki.startupProbe`
+  startupProbe: {}
   # -- Resource requests and limits for the pattern ingester
   resources: {}
   # -- Containers to add to the pattern ingester pods