[COMMON] Export cassandra key metrics

 - Add service monitor template
 - Add metrics container to Cassandra statefulset
 - Update values.yaml to add metrics and servicemonitor config
 - Modify service template to add metrics port configuration

Issue-ID: OOM-2914
Signed-off-by: Suresh Charan <suresh.charan@amdocs.com>
Change-Id: Ia47daea337a414c91367a08ecc043bb3bd9ba697

1 files changed, 61 insertions, 1 deletions

diff --git a/kubernetes/common/cassandra/values.yaml b/kubernetes/common/cassandra/values.yaml
index 1d69993956..597174ee0a 100644
--- a/kubernetes/common/cassandra/values.yaml
+++ b/kubernetes/common/cassandra/values.yaml
@@ -1,4 +1,4 @@
-# Copyright © 2018 Amdocs, Bell Canada, AT&T
+# Copyright © 2022 Amdocs, Bell Canada, AT&T, Bitnami
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -168,3 +168,63 @@ serviceAccount:
   nameOverride: cassandra
   roles:
     - nothing
+
+# Cassandra Metrics
+metrics:
+  enabled: false
+  image: bitnami/cassandra-exporter:2.3.4-debian-10-r641
+  pullPolicy: IfNotPresent
+  ports:
+  - name: tcp-metrics
+    port: 8080
+  podAnnotations:
+    prometheus.io/scrape: 'true'
+    prometheus.io/port: '8080'
+  livenessProbe:
+    enabled: true
+    httpGet:
+      path: /metrics
+      port: 8080
+    initialDelaySeconds: 30
+    periodSeconds: 10
+    timeoutSeconds: 5
+    successThreshold: 1
+    failureThreshold: 3
+  readinessProbe:
+    httpGet:
+      path: /metrics
+      port: 8080
+    enabled: true
+    initialDelaySeconds: 5
+    periodSeconds: 10
+    timeoutSeconds: 5
+    successThreshold: 1
+    failureThreshold: 3
+  serviceMonitor:
+    enabled: false
+    targetPort: 8080
+    path: /metrics
+    basicAuth:
+      enabled: false
+    ## Namespace in which Prometheus is running
+    ##
+    # namespace: monitoring
+
+    ## Interval at which metrics should be scraped.
+    #interval: 30s
+
+    ## Timeout after which the scrape is ended
+    # scrapeTimeout: 10s
+
+    ## ServiceMonitor selector labels
+    selector:
+      app.kubernetes.io/name: '{{ include "common.name" . }}'
+      helm.sh/chart: '{{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}'
+      app.kubernetes.io/instance: '{{ include "common.release" . }}'
+      app.kubernetes.io/managed-by: '{{ .Release.Service }}'
+
+    ## RelabelConfigs to apply to samples before scraping
+    relabelings: []
+
+    ## MetricRelabelConfigs to apply to samples before ingestion
+    metricRelabelings: []