add headless distributor service and configure enterprise gateway to …

…use it by default

Signed-off-by: Edward Welch <edward.welch@grafana.com>

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

@@ -0,0 +1,36 @@
+{{- $isDistributed := eq (include "loki.deployment.isDistributed" .) "true" -}}
+{{- if $isDistributed -}}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "loki.distributorFullname" . }}-headless
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "loki.distributorSelectorLabels" . | nindent 4 }}
+    {{- with .Values.distributor.serviceLabels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+    variant: headless
+    prometheus.io/service-monitor: "false"
+  {{- with .Values.loki.serviceAnnotations }}
+  annotations:
+    {{- 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.distributor.appProtocol.grpc }}
+      appProtocol: {{ .Values.distributor.appProtocol.grpc }}
+      {{- end }}
+  selector:
+    {{- include "loki.distributorSelectorLabels" . | nindent 4 }}
+{{- end -}}

production/helm/loki/templates/gateway/deployment-gateway-enterprise.yaml

@@ -72,7 +72,7 @@ spec:
             {{- if .Values.enterpriseGateway.useDefaultProxyURLs }}
             - -gateway.proxy.default.url=http://{{ template "loki.fullname" . }}-admin-api.{{ .Release.Namespace }}.svc:3100
             - -gateway.proxy.admin-api.url=http://{{ template "loki.fullname" . }}-admin-api.{{ .Release.Namespace }}.svc:3100
-            - -gateway.proxy.distributor.url=http://{{ template "loki.fullname" . }}-distributor.{{ .Release.Namespace }}.svc:3100
+            - -gateway.proxy.distributor.url=dns:///{{ template "loki.fullname" . }}-distributor-headless.{{ .Release.Namespace }}.svc:9095
             - -gateway.proxy.ingester.url=http://{{ template "loki.fullname" . }}-ingester.{{ .Release.Namespace }}.svc:3100
             - -gateway.proxy.query-frontend.url=http://{{ template "loki.fullname" . }}-query-frontend.{{ .Release.Namespace }}.svc:3100
             - -gateway.proxy.ruler.url=http://{{ template "loki.fullname" . }}-ruler.{{ .Release.Namespace }}.svc:3100