build: Add service monitor defintion (if stack_deploy_metrics, deafiu…

…lt 'yes')

roles/fragalysis-stack/defaults/main.yaml

@@ -236,6 +236,9 @@ stack_logging_framework_root_level: INFO
 # Wait for the neo4j graph to become ready before starting the stack?
 stack_wait_for_graph: yes
 
+# Metrics?
+stack_deploy_metrics: yes
+
 # ISPyB/SSH variables ---------------------------------------------------------
 # These are set from vars/sensitive.vault
 # and are defined here for clarity.

roles/fragalysis-stack/tasks/deploy-stack.yaml

@@ -206,6 +206,12 @@
   - service-stack
   - ingress-stack
 
+- name: Deploy Metrics
+  k8s:
+    definition: "{{ lookup('template', 'servicemonitor-stack.yaml.j2') }}"
+    wait: yes
+  when: stack_deploy_metrics|bool
+
 - name: Deploy beat
   k8s:
     definition: "{{ lookup('template', 'deployment-beat.yaml.j2') }}"

roles/fragalysis-stack/templates/servicemonitor-stack.yaml.j2

@@ -0,0 +1,20 @@
+---
+kind: ServiceMonitor
+apiVersion: monitoring.coreos.com/v1
+metadata:
+  name: fragalysis-stack
+  namespace: {{ stack_namespace }}
+spec:
+  # A selector for the Public API Service.
+  # The service to be scraped.
+  selector:
+    matchLabels:
+      name: stack
+  namespaceSelector:
+    matchNames:
+    - {{ stack_namespace }}
+  # The endpoint (port name)
+  # and the scraping interval
+  endpoints:
+  - port: http
+    interval: 60s