add support for metrics-job-start-latency-buckets flag in helm (#2450)

Signed-off-by: Manabu McCloskey <manabu.mccloskey@gmail.com>

charts/spark-operator-chart/README.md

@@ -170,6 +170,7 @@ See [helm uninstall](https://helm.sh/docs/helm/helm_uninstall) for command docum
 | prometheus.metrics.portName | string | `"metrics"` | Metrics port name. |
 | prometheus.metrics.endpoint | string | `"/metrics"` | Metrics serving endpoint. |
 | prometheus.metrics.prefix | string | `""` | Metrics prefix, will be added to all exported metrics. |
+| prometheus.metrics.jobStartLatencyBuckets | string | `"30,60,90,120,150,180,210,240,270,300"` | Job Start Latency histogram buckets. Specified in seconds. |
 | prometheus.podMonitor.create | bool | `false` | Specifies whether to create pod monitor. Note that prometheus metrics should be enabled as well. |
 | prometheus.podMonitor.labels | object | `{}` | Pod monitor labels |
 | prometheus.podMonitor.jobLabel | string | `"spark-operator-podmonitor"` | The label to use to retrieve the job name from |

charts/spark-operator-chart/templates/controller/deployment.yaml

@@ -88,6 +88,7 @@ spec:
         - --metrics-endpoint={{ .Values.prometheus.metrics.endpoint }}
         - --metrics-prefix={{ .Values.prometheus.metrics.prefix }}
         - --metrics-labels=app_type
+        - --metrics-job-start-latency-buckets={{ .Values.prometheus.metrics.jobStartLatencyBuckets }}
         {{- end }}
         {{ if .Values.controller.leaderElection.enable }}
         - --leader-election=true

charts/spark-operator-chart/tests/controller/deployment_test.yaml

@@ -214,6 +214,7 @@ tests:
           portName: test-port
           endpoint: /test-endpoint
           prefix: test-prefix
+          jobStartLatencyBuckets: "180,360,420,690"
     asserts:
       - contains:
           path: spec.template.spec.containers[?(@.name=="spark-operator-controller")].args
@@ -230,6 +231,9 @@ tests:
       - contains:
           path: spec.template.spec.containers[?(@.name=="spark-operator-controller")].args
           content: --metrics-labels=app_type
+      - contains:
+          path: spec.template.spec.containers[?(@.name=="spark-operator-controller")].args
+          content: --metrics-job-start-latency-buckets=180,360,420,690
 
   - it: Should enable leader election by default
     asserts:

charts/spark-operator-chart/values.yaml

@@ -391,6 +391,8 @@ prometheus:
     endpoint: /metrics
     # -- Metrics prefix, will be added to all exported metrics.
     prefix: ""
+    # -- Job Start Latency histogram buckets. Specified in seconds.
+    jobStartLatencyBuckets: "30,60,90,120,150,180,210,240,270,300"
 
   # Prometheus pod monitor for controller pods
   podMonitor: