Prometheus metrics

[git-josip]

I am using a Karavan k8s spring boot. I am wondering did anyone tried to set up and expose Prometheus metrics so they can be collected.
I know spring boot can be configured to expose Prometheus metrics in the actuator and deployed k8s service or pod configured via Prometheus ServiceMonitor so metrics are collected automatically.

[davsclaus]

Yeah you need to do all of this the standard spring boot way - add some prometheus -starter as dependency and maybe some configuration into application.properties.

And add camel-micrometer-starter then it auto collects metrics and via a micrometer-promethus (spring boot standard) then it can be exposed over http in prometheus protcol
https://camel.apache.org/components/3.20.x/micrometer-component.html#_spring_boot_auto_configuration

In karavan, you can just add camel-micrometer as dependency

[git-josip]

@davsclaus thank you for your reply. I was able to enable prometheus metrics actuator endpoint.
First I added in proeprties:
camel.jbang.dependencies=camel:microprofile-health,mvn:io.micrometer:micrometer-registry-prometheus:1.11.1
and after that enabled actuator prometheus endpoint:
management.endpoints.web.exposure.include=health,info,prometheus,configprops,env

I have next question, when my pod is running with metrics exposed I need to dynamically tell prometheus to scrape it and I would like to do that using Prometheus operator. I would like to add custom label that wil be there for all deployed pods and then I will use that label to tell PrometheusOperator to scrape.

CUrrent pod has these labels:

Labels:        
                  app=hzv
                  app.kubernetes.io/runtime=camel
                  group=org.camel.karavan.demo
                  pod-template-hash=898cc4c66
                  provider=jkube
                  version=1

[davsclaus]

You can use jkube fragments, or set labels via label.xxx=aaa in the application properties