Metrics, alerting, dashboards, and keeping your systems healthy.
Microservices give you deployment flexibility and team autonomy, but they'll absolutely destroy your ability to debug latency issues if you don't have the...
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....
A practical DNS troubleshooting guide for DevOps engineers — dig commands, nslookup patterns, common production failure modes, and how to diagnose each one.
A practical guide to sizing Elasticsearch clusters for production — covering node roles, shard counts, heap tuning, and capacity planning formulas.
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.
Deploy Grafana Loki and Promtail for cost-effective, scalable log aggregation — without indexing yourself into bankruptcy.
Deploy and configure the OpenTelemetry Collector to unify traces, metrics, and logs into a single pipeline — with production-tested patterns.
Use Prometheus recording rules to pre-compute expensive queries, speed up dashboards, and make SLO calculations reliable at scale.
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.
A step-by-step guide to implementing SLOs and error budgets using Prometheus — from defining SLIs to building burn-rate alerts.