Prometheus is unable to scrape metics for fluentd on port 24231

Solution Verified - Updated -

Issue

  • FluentdNodeDown alert is continuously streaming:

    FluentdNodeDown
Prometheus could not scrape fluentd 10.0.0.1:24231 for more than 10m.

  • Prometheus is unable to scrape fluentd / collector pods metrics which are running on worker and infra nodes.

  • Prometheus is scraping metrics of collector pods which are running on master nodes.

Environment

  • Red Hat OpenShift Container Platform (RHOCP)
    • 4.8 and posterior version
  • Red Hat OpenShift Logging (RHOL)
    • 5.4
    • 5.5
    • 5.6

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