option to set ServiceMonitor namespace

Fixes: #148
Signed-off-by: Aleksandar Pesic <[email protected]>

Author: peske

README.md

@@ -107,6 +107,7 @@ their default values.
 | `metrics.port`              | TCP port on which the service metrics is exposed                                           | `5001`          |
 | `metrics.serviceMonitor.annotations` | Prometheus Operator ServiceMonitor annotations                                    | `{}`            |
 | `metrics.serviceMonitor.enable` | If true, Prometheus Operator ServiceMonitor will be created                            | `false`         |
+| `metrics.serviceMonitor.namespace` | Namespace where ServiceMonitor should be installed (defaults to current one)        | `""`            |
 | `metrics.serviceMonitor.labels` | Prometheus Operator ServiceMonitor labels                                              | `{}`            |
 | `metrics.prometheusRule.annotations` | Prometheus Operator PrometheusRule annotations                                    | `{}`            |
 | `metrics.prometheusRule.enable` | If true, Prometheus Operator prometheusRule will be created                            | `false`         |

templates/servicemonitor.yaml

@@ -3,6 +3,7 @@ apiVersion: monitoring.coreos.com/v1
 kind: ServiceMonitor
 metadata:
   name: {{ template "docker-registry.fullname" . }}-servicemonitor
+  namespace: {{ default .Release.Namespace .Values.metrics.serviceMonitor.namespace }}
   labels:
     app: {{ template "docker-registry.name" . }}-metrics
     release: {{ .Release.Name }}

values.yaml

@@ -126,6 +126,9 @@ metrics:
   # Create a prometheus-operator servicemonitor
   serviceMonitor:
     enabled: false
+    # Namespace where ServiceMonitor should be installed (i.e. `monitoring`)
+    # Defaults to namespace where the chart is installed.
+    namespace: ""
     labels: {}
   # prometheus-operator PrometheusRule defining alerting rules for a Prometheus instance
   prometheusRule: