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版本：1.4.0

Setting Prometheus

YuniKorn exposes its scheduling metrics via Prometheus. Thus, we need to set up a Prometheus server to collect these metrics.

If you don't know what metric can be used, you can use REST API.

1. Download Prometheus release​

wget https://github.com/prometheus/prometheus/releases/download/v2.30.3/prometheus-2.30.3.linux-amd64.tar.gz
tar xvfz prometheus-*.tar.gz
cd prometheus-*

2. Configure prometheus.yml​

Prometheus collects metrics from targets by scraping metrics HTTP endpoints.

global:
  scrape_interval:     3s
  evaluation_interval: 15s

scrape_configs:
  - job_name: 'yunikorn'
    scrape_interval: 1s
    metrics_path: '/ws/v1/metrics'
    static_configs:
    - targets: ['localhost:9080'] 
    # 9080 is internal port, need port forward or modify 9080 to service's port

3. Start port-forward​

Port forwarding for the core's web service on the standard port can be turned on via:

kubectl port-forward svc/yunikorn-service 9080:9080 -n yunikorn

9080is the default port for core's web service.

4. Execute prometheus​

./prometheus --config.file=prometheus.yml

prometheus-cmd

5. Access the Prometheus UI​

You should be able to browse to a status page at localhost:9090. Give it a couple of seconds to collect data about itself from its own HTTP metrics endpoint.

prometheus-web-ui

You can also verify that Prometheus is serving metrics by navigating to its metrics endpoint:localhost:9090/metrics