Common Prometheus errors, step-by-step fixes, and troubleshooting guides. Resolve issues quickly with practical solutions from experienced DevOps engineers.
If you've spent any time with Prometheus, you've seen it. That red `DOWN` label in the Targets page, accompanied by the dreaded `connection refused` error....
You've deployed Prometheus, configured your targets, and everything looks perfect in your YAML files. Then you check the Prometheus UI and see those dreade...
Resolve the Grafana datasource error when connecting to Prometheus, caused by URL misconfiguration, network issues, or authentication problems.
Resolve Prometheus 'context deadline exceeded' errors caused by slow scrape targets, network issues, or misconfigured timeouts with this step-by-step fix guide.
Diagnose and fix Prometheus out-of-memory crashes caused by high cardinality, excessive retention, or misconfigured storage with practical steps and commands.
Use Prometheus recording rules to pre-compute expensive queries, speed up dashboards, and make SLO calculations reliable at scale.
A step-by-step guide to implementing SLOs and error budgets using Prometheus — from defining SLIs to building burn-rate alerts.
If you're running Kubernetes clusters across multiple data centers or cloud regions, you've probably felt the pain of fragmented observability. Each cluste...
If you're running Prometheus at scale with Thanos for long-term storage, misconfigured remote write settings are silently killing your performance — and yo...
If you've been running Prometheus in production for more than a few months, you've probably hit the wall. Dashboards that take 30 seconds to load. Alerts t...
How to use Istio's built-in observability — distributed tracing with Jaeger, Prometheus metrics, Kiali service graph — and enforce zero-trust access control with AuthorizationPolicies.
Write Prometheus alerting rules that page on real problems, not noise — with practical PromQL, severity levels, and runbook patterns.
Configure Prometheus Kubernetes service discovery to automatically scrape pods, services, and nodes — no manual target management.
A practical PromQL reference covering request rates, latency percentiles, resource usage, and Kubernetes workload queries for real production dashboards.
Build a production Prometheus and Grafana monitoring stack from scratch — service discovery, recording rules, alerting, and dashboards.
PromQL cheat sheet with copy-paste query examples for rates, aggregations, histograms, label matching, recording rules, and alerting expressions.
Leverage Istio's built-in observability — Kiali service graph, Jaeger distributed tracing, Prometheus metrics, and Grafana dashboards for your service mesh.
How to configure Kubernetes HPA with Prometheus custom metrics so your workloads scale on what actually matters — not just CPU and memory.
Design Prometheus alerting rules that catch real incidents and ignore noise — practical patterns from years of on-call experience.
Build Grafana dashboards that surface real signals instead of decorating walls — a structured approach rooted in SRE principles.
Open-source monitoring and alerting toolkit. Pull-based metrics collection with a powerful query language (PromQL), built-in alerting, and native Kubernetes service discovery.
Request a troubleshooting guide for your specific Prometheus issue. Our team writes new fix guides based on community requests.