Despite its dramatic name, Prometheus Chaos Edition is not an official Prometheus release. It is a concept (and accompanying script/container) popularized by the Prometheus community and tools like kube-prometheus-stack chaos experiments.
What happens when your Prometheus server runs out of memory? What if a metric scrape takes 30 seconds because a target is thrashing? What if your alerting rules become corrupt?
We all love Prometheus. It scrapes metrics, fires alerts, and helps us sleep at night. But here’s a painful truth most engineers realize at 3 AM: Your monitoring system can fail, and you won’t know about it until the real outage happens. prometheus chaos edition
Before we dive into code, let’s address the obvious question: Why would I voluntarily break my monitoring?
Breaking Monitoring Before It Breaks You: A Hands-On Guide to Prometheus Chaos Edition Despite its dramatic name, Prometheus Chaos Edition is
In short: How to Run Prometheus Chaos Edition (Step-by-Step)
apiVersion: chaos-mesh.org/v1alpha1 kind: NetworkChaos metadata: name: prometheus-slow-scrape spec: action: delay mode: all selector: pods: prometheus-ns: - prometheus-server-0 delay: latency: "3s" correlation: "100" jitter: "1s" duration: "5m" Apply with kubectl apply -f chaos.yaml . Prometheus will now see all outbound scrape requests delayed. One of the most insidious PCE experiments is injecting malformed OpenMetrics data. What if a metric scrape takes 30 seconds
@app.route('/metrics') def metrics(): if random.random() < 0.2: # 20% of the time return "malformed_metric{ invalid syntax", 200 return Response(real_metrics(), mimetype='text/plain')
# malicious_exporter.py from flask import Flask, Response import random app = Flask()
# Inject 5s latency into 50% of scrape requests for 2 minutes curl -X POST http://localhost:9091/inject/latency \ -d '"duration":"2m","percent":50,"delay":"5s"' If you run Prometheus Operator, pair it with Chaos Mesh (CNCF project) and a NetworkChaos experiment:
Create a small proxy that intercepts /metrics endpoints: