[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

2 files changed, 64 insertions, 1 deletions

diff --git a/kubernetes/common/cassandra/templates/servicemonitor.yaml b/kubernetes/common/cassandra/templates/servicemonitor.yaml
new file mode 100644
index 0000000000..5297e692d2
--- /dev/null
+++ b/kubernetes/common/cassandra/templates/servicemonitor.yaml
@@ -0,0 +1,19 @@
+{{/*
+# Copyright © 2022 Amdocs, Bitnami, Bell Canada
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/}}
+
+{{- if .Values.metrics.serviceMonitor.enabled }}
+{{  include "common.serviceMonitor" . }}
+{{- end }}
\ No newline at end of file
diff --git a/kubernetes/common/cassandra/templates/statefulset.yaml b/kubernetes/common/cassandra/templates/statefulset.yaml
index 840e95b490..43367ee542 100644
--- a/kubernetes/common/cassandra/templates/statefulset.yaml
+++ b/kubernetes/common/cassandra/templates/statefulset.yaml
@@ -1,5 +1,5 @@
 {{/*
-# Copyright © 2018 Amdocs, AT&T, Bell Canada
+# Copyright © 2022 Amdocs, AT&T, Bell Canada, Bitnami
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -26,6 +26,15 @@ spec:
     type: {{ .Values.updateStrategy.type }}
   template:
     metadata: {{- include "common.templateMetadata" . | nindent 6 }}
+      {{- if or .Values.podAnnotations (and .Values.metrics.serviceMonitor.enabled .Values.metrics.podAnnotations) }}
+      annotations:
+        {{- if .Values.podAnnotations }}
+        {{- include "common.tplValue" (dict "value" .Values.podAnnotations "context" $) | nindent 8 }}
+        {{- end }}
+        {{- if and .Values.metrics.serviceMonitor.enabled .Values.metrics.podAnnotations }}
+        {{- include "common.tplValue" (dict "value" .Values.metrics.podAnnotations "context" $) | nindent 8 }}
+        {{- end }}
+      {{- end }}
     spec:
       hostNetwork: {{ .Values.hostNetwork }}
       imagePullSecrets:
@@ -126,6 +135,41 @@ spec:
               command: ["/bin/sh", "-c", "PID=$(pidof java) && kill $PID && while ps -p $PID > /dev/null; do sleep 1; done"]
         {{- end }}
         resources: {{ toYaml .Values.resources | nindent 10 }}
+      {{- if .Values.metrics.serviceMonitor.enabled }}
+      - name: {{ include "common.name" . }}-metrics
+        image: {{ include "repositoryGenerator.dockerHubRepository" . }}/{{ .Values.metrics.image }}
+        imagePullPolicy: {{ .Values.global.pullPolicy | default .Values.metrics.pullPolicy | quote}}
+        {{- if (.Values.metrics.enabled) }}
+        ports:
+        {{- range $index, $metricPort := .Values.metrics.ports }}
+        - name: {{ $metricPort.name }}
+          containerPort: {{ $metricPort.port }}
+          protocol: TCP
+        {{- end }}
+        livenessProbe:
+          httpGet:
+            path: {{ .Values.metrics.livenessProbe.httpGet.path }}
+            port: {{ .Values.metrics.livenessProbe.httpGet.port }}
+          initialDelaySeconds: {{ .Values.metrics.livenessProbe.initialDelaySeconds }}
+          periodSeconds: {{ .Values.metrics.livenessProbe.periodSeconds }}
+          timeoutSeconds: {{ .Values.metrics.livenessProbe.timeoutSeconds }}
+          successThreshold: {{ .Values.metrics.livenessProbe.successThreshold }}
+          failureThreshold: {{ .Values.metrics.livenessProbe.failureThreshold }}
+        readinessProbe:
+          httpGet:
+            path: {{ .Values.metrics.readinessProbe.httpGet.path }}
+            port: {{ .Values.metrics.readinessProbe.httpGet.port }}
+          initialDelaySeconds: {{ .Values.metrics.readinessProbe.initialDelaySeconds }}
+          periodSeconds: {{ .Values.metrics.readinessProbe.periodSeconds }}
+          timeoutSeconds: {{ .Values.metrics.readinessProbe.timeoutSeconds }}
+          successThreshold: {{ .Values.metrics.readinessProbe.successThreshold }}
+          failureThreshold: {{ .Values.metrics.readinessProbe.failureThreshold }}
+        {{- end }}
+        {{ include "common.containerSecurityContext" . | indent 10 | trim }}
+        {{- if .Values.metrics.resources }}
+        resources: {{- toYaml .Values.metrics.resources | nindent 10 }}
+        {{- end }}
+      {{- end }}
       {{- if .Values.nodeSelector }}
       nodeSelector: {{ toYaml .Values.nodeSelector | nindent 8 }}
       {{- end -}}