feat(helm): Add tpl() support back to read, write and backend pods (#16664)

Author: DylanGuedes

production/helm/loki/CHANGELOG.md

@@ -14,6 +14,7 @@ Entries should include a reference to the pull request that introduced the chang
 [//]: # (<AUTOMATED_UPDATES_LOCATOR> : do not remove this line. This locator is used by the CI pipeline to automatically create a changelog entry for each new Loki release. Add other chart versions and respective changelog entries bellow this line.)
 
 - [CHANGE] Add extraContainers parameter for the backend pod
+- [CHANGE] Add `tpl()` support for backend, read, write, and admin-api components
 
 ## 6.27.0
 

production/helm/loki/templates/admin-api/deployment-admin-api.yaml

@@ -25,7 +25,7 @@ spec:
       labels:
         {{- include "enterprise-logs.adminApiLabels" . | nindent 8 }}
         {{- with merge .Values.loki.podLabels .Values.adminApi.labels }}
-        {{- toYaml . | nindent 8 }}
+        {{- tpl (toYaml .) $ | nindent 8 }}
         {{- end }}
         app.kubernetes.io/part-of: memberlist
       annotations:

production/helm/loki/templates/backend/statefulset-backend.yaml

@@ -54,7 +54,7 @@ spec:
       labels:
         {{- include "loki.backendLabels" . | nindent 8 }}
         {{- with merge .Values.loki.podLabels .Values.backend.podLabels }}
-        {{- toYaml . | nindent 8 }}
+        {{- tpl (toYaml .) $ | nindent 8 }}
         {{- end }}
         app.kubernetes.io/part-of: memberlist
     spec:

production/helm/loki/templates/read/statefulset-read.yaml

@@ -58,7 +58,7 @@ spec:
         app.kubernetes.io/part-of: memberlist
         {{- include "loki.readLabels" . | nindent 8 }}
         {{- with merge .Values.loki.podLabels .Values.read.podLabels }}
-        {{- toYaml . | nindent 8 }}
+        {{- tpl (toYaml .) $ | nindent 8 }}
         {{- end }}
     spec:
       serviceAccountName: {{ include "loki.serviceAccountName" . }}

production/helm/loki/templates/write/statefulset-write.yaml

@@ -57,7 +57,7 @@ spec:
       labels:
         {{- include "loki.writeLabels" . | nindent 8 }}
         {{- with merge .Values.loki.podLabels .Values.write.podLabels }}
-        {{- toYaml . | nindent 8 }}
+        {{- tpl (toYaml .) $ | nindent 8 }}
         {{- end }}
         app.kubernetes.io/part-of: memberlist
     spec: