# Why Prometheus couldn't see Cilium metrics at 2 a.m.

DevFeed: [Why Prometheus couldn't see Cilium metrics at 2 a.m.](<https://devfeed.tech/articles/why-prometheus-couldn-t-see-cilium-metrics-at-2-a-m-17617.md>)

Original publisher: [Read original article](<https://thenewstack.io/cncf-projects-integration-production/>)

Author: Rishi Mondal

Published: 2026-05-10T14:00:00Z

Content type: article

Language: en

Sources: [Kubernetes Overview, News and Trends | The New Stack](<https://devfeed.tech/sources/kubernetes-overview-news-and-trends-the-new-stack.md>)

Topics: [Prometheus](<https://devfeed.tech/topics/prometheus.md>), [Cilium](<https://devfeed.tech/topics/cilium.md>), [Grafana](<https://devfeed.tech/topics/grafana.md>), [Kubernetes](<https://devfeed.tech/topics/kubernetes.md>), [Cloud Native Ecosystem](<https://devfeed.tech/topics/cloud-native-ecosystem.md>), [Monitoring](<https://devfeed.tech/topics/monitoring.md>)

Tags: [cilium](<https://devfeed.tech/tags/cilium.md>), [cloud-native-ecosystem](<https://devfeed.tech/tags/cloud-native-ecosystem.md>), [cncf](<https://devfeed.tech/tags/cncf.md>), [grafana](<https://devfeed.tech/tags/grafana.md>), [kubernetes](<https://devfeed.tech/tags/kubernetes.md>), [monitoring](<https://devfeed.tech/tags/monitoring.md>), [network](<https://devfeed.tech/tags/network.md>), [networking](<https://devfeed.tech/tags/networking.md>), [platform-engineering](<https://devfeed.tech/tags/platform-engineering.md>), [post-contributed](<https://devfeed.tech/tags/post-contributed.md>), [prometheus](<https://devfeed.tech/tags/prometheus.md>), [sponsor-cncf](<https://devfeed.tech/tags/sponsor-cncf.md>), [sponsored-post-contributed](<https://devfeed.tech/tags/sponsored-post-contributed.md>), [tls](<https://devfeed.tech/tags/tls.md>)

## AI overview

This article examines the integration tax that platform teams encounter when combining CNCF projects in production. It uses Prometheus and Cilium metrics as an example, and discusses integration failures involving Hubble, Grafana, cert-manager, ingress controllers, and cloud DNS configuration.

## Source excerpt

I still remember the first time we lost sleep over something that wasn't a bug. It was a Tuesday. Grafana The post Why Prometheus couldn't see Cilium metrics at 2 a.m. appeared first on The New Stack.