fix(mycloud-matrix): add monitoring for redis

mycloud-matrix/templates/server/synapse.yaml

@@ -294,6 +294,25 @@ spec:
       database: {{ .name | quote }}
       {{- end }}
 
+    redis:
+      enabled: true
+      replica:
+        # just one replica
+        replicaCount: {{ .Values.commons.redis.replicas }}
+      metrics:
+        enabled: true
+        serviceMonitor:
+          enabled: {{ (.Capabilities.APIVersions.Has "monitoring.coreos.com/v1/ServiceMonitor") }}
+          additionalLabels:
+            {{- toYaml .Values.commons.prometheus.monitor.labels | nindent 12 }}
+        prometheusRule:
+          # empty rules
+          enabled: false
+          # {{ (.Capabilities.APIVersions.Has "monitoring.coreos.com/v1/PrometheusRule") }}
+          additionalLabels:
+            {{- toYaml .Values.commons.prometheus.rules.labels | nindent 12 }}
+          rules: []
+
     prometheus:
       podmonitor:
         enabled: {{ (.Capabilities.APIVersions.Has "monitoring.coreos.com/v1/PodMonitor") }}