fix: in helm chart fix indentation in nginx gateway config template handling (#18167)

Signed-off-by: Jim Croft <[email protected]>

Author: JimCroftMaltedAI

production/helm/loki/CHANGELOG.md

@@ -17,6 +17,7 @@ Entries should include a reference to the pull request that introduced the chang
 - [FEATURE] Added pdb for pattern ingester [#17058](https://github.com/grafana/loki/pull/17058)
 - [BUGFIX] Ensure ui.enabled=true is set in loki ConfigMap when loki.ui.enabled=true is set in values.yaml to actually enable the UI [#17562](https://github.com/grafana/loki/pull/17562)
 - [FEATURE] Added trafficDistribution to service-distributor for multi-az purpose
+- [BUGFIX] Fix custom gateway nginx config rendering error [#18167](https://github.com/grafana/loki/pull/18167)
 
 ## 6.30.1
 

production/helm/loki/templates/_helpers.tpl

@@ -747,7 +747,7 @@ Create the service endpoint including port for MinIO.
 {{- end -}}
 
 {{/* Snippet for the nginx file used by gateway */}}
-{{- define "loki.nginxFile" }}
+{{- define "loki.nginxFile" -}}
 worker_processes  5;  ## Default: 1
 error_log  /dev/stderr;
 pid        /tmp/nginx.pid;

production/helm/loki/templates/gateway/configmap-gateway.yaml

@@ -8,5 +8,5 @@ metadata:
     {{- include "loki.gatewayLabels" . | nindent 4 }}
 data:
   nginx.conf: |
-    {{- tpl .Values.gateway.nginxConfig.file . | indent 2 }}
+    {{- tpl .Values.gateway.nginxConfig.file . | nindent 4 }}
 {{- end }}

production/helm/loki/values.yaml

@@ -1190,7 +1190,7 @@ gateway:
     # -- Config file contents for Nginx. Passed through the `tpl` function to allow templating
     # @default -- See values.yaml
     file: |
-      {{- include "loki.nginxFile" . | indent 2 -}}
+      {{- include "loki.nginxFile" . -}}
 # -- If running enterprise and using the default enterprise gateway, configs go here.
 enterpriseGateway:
   # -- Define the amount of instances