Alertmanager: use endpoints section and lookups to set port

This PS moves alertmanager to use the endpoints section and
lookups to set the ports it serves on.

Change-Id: I62108ca207f615d10d0b4385da204214b9aeae32

prometheus-alertmanager/templates/bin/_alertmanager.sh.tpl

@@ -31,7 +31,7 @@ function generate_peers () {
   final_pod_suffix=$(( {{ .Values.pod.replicas.alertmanager }}-1 ))
   for pod_suffix in `seq 0 "$final_pod_suffix"`
   do
-    echo -mesh.peer={{ .Release.Name }}-$pod_suffix.$DISCOVERY_SVC:6783
+    echo -mesh.peer={{ .Release.Name }}-$pod_suffix.$DISCOVERY_SVC:$MESH_PORT
   done
 }
 

prometheus-alertmanager/templates/service-discovery.yaml

@@ -26,7 +26,7 @@ spec:
   clusterIP: None
   ports:
   - name: peer-mesh
-    port: {{ .Values.network.alertmanager.mesh_port }}
+    port: {{ tuple "alerts" "internal" "mesh" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
   selector:
 {{ tuple $envAll "alertmanager" "server" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 4 }}
 {{- end }}

prometheus-alertmanager/templates/service.yaml

@@ -27,7 +27,7 @@ spec:
     {{ if .Values.network.alertmanager.node_port.enabled }}
     nodePort: {{ .Values.network.alertmanager.node_port.port }}
     {{ end }}
-    port: {{ .Values.network.alertmanager.port }}
+    port: {{ tuple "alerts" "internal" "api" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
   selector:
 {{ tuple $envAll "alertmanager" "server" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 4 }}
   {{ if .Values.network.alertmanager.node_port.enabled }}

prometheus-alertmanager/templates/statefulset.yaml

@@ -81,15 +81,17 @@ spec:
           env:
             - name: DISCOVERY_SVC
               value: {{ tuple "alerts" "discovery" . | include "helm-toolkit.endpoints.hostname_short_endpoint_lookup" }}
+            - name: MESH_PORT
+              value: {{ tuple "alerts" "internal" "mesh" . | include "helm-toolkit.endpoints.endpoint_port_lookup" | quote }}
           ports:
             - name: alerts-api
-              containerPort: {{ .Values.network.alertmanager.port }}
+              containerPort: {{ tuple "alerts" "internal" "api" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
             - name: peer-mesh
-              containerPort: {{ .Values.network.alertmanager.mesh_port }}
+              containerPort: {{ tuple "alerts" "internal" "mesh" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
           readinessProbe:
             httpGet:
               path: /#/status
-              port: {{ .Values.network.alertmanager.port }}
+              port: {{ tuple "alerts" "internal" "api" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
             initialDelaySeconds: 30
             timeoutSeconds: 30
           volumeMounts:

prometheus-alertmanager/values.yaml

@@ -133,8 +133,6 @@ network:
     node_port:
       enabled: false
       port: 30903
-    port: 9093
-    mesh_port: 6783
 
 storage:
   enabled: true