fix(helm): add headless querier service update tail_proxy_url to use headless service

production/helm/loki/templates/_helpers.tpl

@@ -1183,6 +1183,18 @@ enableServiceLinks: false
 {{- printf "%s" $querierAddress }}
 {{- end }}
 
+{{/* Determine headless querier address for tail proxy */}}
+{{- define "loki.querierHeadlessAddress" -}}
+{{- $querierAddress := "" }}
+{{- $isDistributed := eq (include "loki.deployment.isDistributed" .) "true" -}}
+{{- if $isDistributed -}}
+{{- $querierHost := include "loki.querierFullname" .}}
+{{- $querierUrl := printf "http://%s-headless.%s.svc.%s:3100" $querierHost .Release.Namespace .Values.global.clusterDomain }}
+{{- $querierAddress = $querierUrl }}
+{{- end -}}
+{{- printf "%s" $querierAddress }}
+{{- end }}
+
 {{/* Determine index-gateway address */}}
 {{- define "loki.indexGatewayAddress" -}}
 {{- $idxGatewayAddress := ""}}

production/helm/loki/templates/querier/service-querier-headless.yaml

@@ -0,0 +1,37 @@
+{{- $isDistributed := eq (include "loki.deployment.isDistributed" .) "true" -}}
+{{- if $isDistributed -}}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "loki.querierFullname" . }}-headless
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "loki.querierLabels" . | nindent 4 }}
+    {{- with .Values.querier.serviceLabels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+  annotations:
+    {{- with .Values.loki.serviceAnnotations }}
+    {{- toYaml . | nindent 4}}
+    {{- end }}
+    {{- with .Values.querier.serviceAnnotations }}
+    {{- toYaml . | nindent 4}}
+    {{- end }}
+spec:
+  type: ClusterIP
+  clusterIP: None
+  ports:
+    - name: http-metrics
+      port: 3100
+      targetPort: http-metrics
+      protocol: TCP
+    - name: grpc
+      port: 9095
+      targetPort: grpc
+      protocol: TCP
+      {{- if .Values.querier.appProtocol.grpc }}
+      appProtocol: {{ .Values.querier.appProtocol.grpc }}
+      {{- end }}
+  selector:
+    {{- include "loki.querierSelectorLabels" . | nindent 4 }}
+{{- end -}}

production/helm/loki/values.yaml

@@ -560,7 +560,7 @@ loki:
     mode: simple
   frontend:
     scheduler_address: '{{ include "loki.querySchedulerAddress" . }}'
-    tail_proxy_url: '{{ include "loki.querierAddress" . }}'
+    tail_proxy_url: '{{ include "loki.querierHeadlessAddress" . }}'
   frontend_worker:
     scheduler_address: '{{ include "loki.querySchedulerAddress" . }}'
   # -- Optional distributor configuration