Cold starts are the silent SLO killer in serverless architectures. You've built a beautiful Lambda function, deployed it, and everything looks great in you...
If you're running Apache in production without a Web Application Firewall, you're essentially leaving your front door unlocked. mod_security is the industr...
If you've been working with Terraform for a while, you've probably hit that wall where you need to create resources with configurations that vary based on...
Cross-account resource access in AWS is like giving someone the keys to your house—you want them to get in, but only through the right door, at the right t...
Resolve Ansible unreachable host failures — diagnose SSH connectivity, key auth, Python interpreter, and timeout issues.
Diagnose and resolve GitHub Actions workflows that remain stuck in 'queued' status, covering runner availability, concurrency limits, and label mismatches.
Diagnose and fix HAProxy 503 Service Unavailable errors caused by backend servers failing health checks, connection limits, or misconfigured routing.
Resolve the Helm 'another operation (install/upgrade/rollback) is in progress' error caused by stuck releases with safe recovery steps.
Clean up Kubernetes evicted pods and fix the underlying disk pressure or resource exhaustion that causes pod evictions.
Safely unlock Terraform state when a lock is stuck after a crashed apply, CI timeout, or interrupted operation.
Deploy and operate production workloads on Alibaba Cloud Container Service for Kubernetes with autoscaling, SLB ingress, and ARMS monitoring.
Build AWS IAM policies using least privilege without locking yourself out — practical patterns for roles, service accounts, and permission boundaries.
Cut Docker image sizes by up to 80% using multi-stage builds — practical patterns for Go, Node.js, and Python apps in production.
Build, test, and deploy containerized apps with Google Cloud Build — triggers, substitutions, private pools, and GKE integration.
Set up Grafana unified alerting with contact points, notification policies, silences, and on-call escalation that works in production.
Set up a highly available load balancer pair using Keepalived VRRP with a shared virtual IP that automatically fails over between two nodes.
Implement Nginx rate limiting using limit_req and limit_conn to protect APIs from abuse, brute force, and traffic spikes in production.
Write Prometheus alerting rules that page on real problems, not noise — with practical PromQL, severity levels, and runbook patterns.
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 Envoy as an edge proxy and sidecar for microservices — listeners, clusters, routes, circuit breaking, retries, and observability features.
Configure HAProxy for HTTP and TCP load balancing — installation, frontends, backends, health checks, ACLs, SSL termination, and the stats dashboard.
Install Istio on Kubernetes, understand the control plane architecture, deploy your first sidecar proxy, and configure namespace injection.
Enable mutual TLS in Istio, configure PeerAuthentication and AuthorizationPolicy, and secure service-to-service communication with zero-trust principles.
Leverage Istio's built-in observability — Kiali service graph, Jaeger distributed tracing, Prometheus metrics, and Grafana dashboards for your service mesh.
Configure Istio VirtualServices, DestinationRules, and Gateways for advanced traffic routing, canary deployments, fault injection, and circuit breaking.
Implement automatic failover for HAProxy and Nginx using Keepalived with VRRP — virtual IPs, health checks, and split-brain prevention.
Set up Nginx as a reverse proxy with SSL termination, response caching, rate limiting, and load balancing for high-traffic applications.
Deploy Grafana Loki and Promtail for cost-effective, scalable log aggregation — without indexing yourself into bankruptcy.
Design on-call rotations that protect your team from burnout — with metrics, policies, and SLO-driven improvements that actually work.
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 structured, blameless postmortem process with a ready-to-use template — built from real SRE incident patterns and Google SRE book principles.
A step-by-step guide to implementing SLOs and error budgets using Prometheus — from defining SLIs to building burn-rate alerts.