Chapter 12. Monitoring with Prometheus

Procedure

1. Patch the services to expose the port number 9090.

   1. Patch the Sensor service:

      $ oc -n stackrox patch svc/sensor -p '{"spec":{"ports":[{"name":"monitoring","port":9090,"protocol":"TCP","targetPort":9090}]}}' 

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      If you use Kubernetes, enter kubectl instead of oc.

   2. Patch the Central service:

      $ oc -n stackrox patch svc/central -p '{"spec":{"ports":[{"name":"monitoring","port":9090,"protocol":"TCP","targetPort":9090}]}}'

2. Modify network policies to allow ingress.

   $ oc apply -f - <<EOF 

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   apiVersion: networking.k8s.io/v1
   kind: NetworkPolicy
   metadata:
     labels:
       app.kubernetes.io/name: stackrox
     name: allow-monitoring
     namespace: stackrox
   spec:
     ingress:
     - ports:
       - port: 9090
         protocol: TCP
     podSelector:
       matchExpressions:
       - {key: app, operator: In, values: [central, sensor, collector]}
     policyTypes:
     - Ingress
   EOF

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   If you use Kubernetes, enter kubectl instead of oc.