Allow to override the cluster headless service port name for Istio support

CHANGELOG.md

@@ -29,6 +29,9 @@ Main (unreleased)
   This port can be configured with `--server.http.listen-addr` or using
   the default listen address`127.0.0.1:12345`. (@mattdurham) 
 
+v1.1.0-rc.0
+-----------
+
 ### Other changes
 
 - `prometheus.exporter.snmp`: Updating SNMP exporter from v0.24.1 to v0.26.0.

operations/helm/charts/alloy/CHANGELOG.md

@@ -10,6 +10,10 @@ internal API changes are not present.
 Unreleased
 ----------
 
+### Bugfixes
+
+- Fix clustering on instances running within Istio mesh by allowing to change the name of the clustering port
+
 0.3.0 (2024-05-14)
 ------------------
 

operations/helm/charts/alloy/templates/cluster_service.yaml

@@ -19,7 +19,7 @@ spec:
     #
     # This service should only be used for clustering, and not metric
     # collection.
-    - name: http
+    - name: {{ coalesce $values.clustering.portName "http" }}
       port: {{ $values.listenPort }}
       targetPort: {{ $values.listenPort }}
       protocol: "TCP"

operations/helm/charts/alloy/values.yaml

@@ -41,6 +41,9 @@ alloy:
     # -- Deploy Alloy in a cluster to allow for load distribution.
     enabled: false
 
+    # -- Name for the port used for clustering, useful if running inside an Istio Mesh
+    portName: http
+
   # -- Minimum stability level of components and behavior to enable. Must be
   # one of "experimental", "public-preview", or "generally-available".
   stabilityLevel: "generally-available"