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Chapter 10. Prometheus and Grafana metrics under Red Hat Quay
Red Hat Quay exports a Prometheus- and Grafana-compatible endpoint on each instance to allow for easy monitoring and alerting.
10.1. Exposing the Prometheus endpoint
The Prometheus- and Grafana-compatible endpoint on the Red Hat Quay instance can be found at port 9092. See Monitoring Quay with Prometheus and Grafana for details on configuring Prometheus and Grafana to monitor Quay repository counts.
10.1.1. Setting up Prometheus to consume metrics
Prometheus needs a way to access all Red Hat Quay instances running in a cluster. In the typical setup, this is done by listing all the Red Hat Quay instances in a single named DNS entry, which is then given to Prometheus.
10.1.2. DNS configuration under Kubernetes
A simple Kubernetes service can be configured to provide the DNS entry for Prometheus. Details on running Prometheus under Kubernetes can be found at Prometheus and Kubernetes and Monitoring Kubernetes with Prometheus.
10.1.3. DNS configuration for a manual cluster
SkyDNS is a simple solution for managing this DNS record when not using Kubernetes. SkyDNS can run on an etcd cluster. Entries for each Red Hat Quay instance in the cluster can be added and removed in the etcd store. SkyDNS will regularly read them from there and update the list of Quay instances in the DNS record accordingly.
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