ADD PUMA METRICS TO ALL APPS: As a Dan, I want to see our apps able to scale up and down according to custom metrics, so I can see interesting new squiggly lines in dashboards.

[paul-mesnilgrente]

ADD PUMA METRICS TO ALL APPS: As a Dan, I want to see our apps able to scale up and down according to custom metrics, so I can see interesting new squiggly lines in dashboards.

STORY

Acceptance Criteria

• Expose puma metrics in Prometheus format at :9393/stats across all apps. (staging and production)
• This new metric is scraped by Prometheus.

Notes

• Add the following annotation to the pod to enable Prometheus scrapes this new metric

    annotations:
      prometheus.io/path: /stats
      prometheus.io/port: "9393"
      prometheus.io/scrape: "true"

• This has already been added to API (staging/prod), Thumbnailer (prod), Natlib (staging/ prod)