[Bug] pulsar-recovery and pulsar-bookie components do not supply metrics in the standard Prometheus format.

[JWebDev]

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• I searched in the issues and found nothing similar.

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• I understand that unsupported versions don't get bug fixes. I will attempt to reproduce the issue on a supported version of Pulsar client and Pulsar broker.

Version

apachepulsar/pulsar-all:4.0.0

Minimal reproduce step

Is this a bug or is it designed that way? Is there any solution for this? Because 2 other components send metrics in the correct format and prometheus reads them without problems. I don't use kube-prometheus-stack I add annotations to each component for my prometheus server to pick up the metrics.
For example:

autorecovery:
  replicaCount: 1
  podMonitor:
    enabled: false
  annotations:
    prometheus.io/scrape: “true”
    prometheus.io/path: “/metrics”
    prometheus.io/port: “8000”
broker:
  replicaCount: 1
  podMonitor:
    enabled: false
  annotations:
    prometheus.io/scrape: “true”
    prometheus.io/path: “/metrics”
    prometheus.io/port: “8080”

``/metrics` are visible in all components, so they are there.

What did you expect to see?

The same as in broker and zookeeper

pulsar-broker-0:/pulsar$ curl -I localhost:8080/metrics
HTTP/1.1 302 Found
Date: Sun, 01 Dec 2024 04:45:11 GMT
Location: http://localhost:8080/metrics/
Content-Length: 0
Server: Jetty(9.4.56.v20240826)

pulsar-zookeeper-0:/pulsar$ curl -I localhost:8000/metrics
HTTP/1.1 200 OK
Date: Sun, 01 Dec 2024 04:45:37 GMT
Content-Type: text/plain; version=0.0.4; charset=utf-8
Content-Length: 61427
Server: Jetty(9.4.56.v20240826)

What did you see instead?

pulsar-recovery-0:/pulsar$ curl -I localhost:8000/metrics
HTTP/1.1 405 Method Not Allowed

pulsar-bookie-0:/pulsar$ curl -I localhost:8000/metrics
HTTP/1.1 405 Method Not Allowed

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[lhotari]

@JWebDev Do you use the Apache Pulsar Helm chart for deployment?

[JWebDev]

Hi @lhotari , yes. https://artifacthub.io/packages/helm/apache/pulsar