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# 2026
A hostname that never existed took Redis and Postgres down with it
A logging misconfiguration pointed two dozen services at a DNS name nobody ever created. They retried it 46 times a second, burnt 28% of the AWS per-ENI resolver budget, and starved DNS for two services that had never touched Elasticsearch. A postmortem of getaddrinfo EAI_AGAIN.
India's first heritage city, Gujarat's first KCD
Gujarat's first KCD is in Ahmedabad on 19 September. The city from a local: where to eat, the 600-year-old pols, and what nobody warns you about.
Prometheus PCA and OpenTelemetry OTCA, reviewed
Two multiple-choice, $250 CNCF associate exams for observability: Prometheus PCA leans on PromQL, OTCA leans on the OpenTelemetry API and SDK. Here's an honest read on both, and which to take first.
CKA exam day: PSI bridge, terminal, kubectl aliases
The logistics nobody mentions until exam day: PSI Secure Browser setup, what the exam terminal actually gives you, kubectl aliases worth memorizing, and how to manage the clock.
Kubernetes v1.37 (Garhwal): 52 forts, 67 changes, and what actually breaks
A complete, plain-language guide to Kubernetes v1.37 Garhwal: every Stable graduation, the Beta features now on by default, working YAML for the ones you'll use, and the four changes that can stop your upgrade dead.
What the CKA actually tests in 2026
The CKA is a live-terminal, performance-based exam against real clusters, not multiple choice. Here's the format, what it actually covers, how to practice, and where people lose time.
Is KCNA worth $250 as a first certification
KCNA is multiple choice, has no prerequisite, and is the cheapest cert in the Linux Foundation catalog. Here's what it actually covers, and who should skip it entirely.
The Kubestronaut path and what it really costs
Kubestronaut means holding five CNCF certifications at once: KCNA, KCSA, CKA, CKAD, and CKS. Here's the real cost breakdown, a realistic study timeline, and who it's actually for.
My CNCF DevStats score is 178, and now I can't stop checking it
A tiny tool turns your GitHub username into a CNCF contribution score. Mine came back 178. Here's what that number is actually made of, and how to check yours.
CKA vs CKAD vs CKS: which to take first
CKA, CKAD, and CKS all share the same live-terminal format and the same $445 price tag, but they certify very different jobs. Here's who each one is for and what order makes sense.
Hello, world: the blog now lives on rushabhshah.dev
Why I moved my writing from Hashnode to my own domain, and how this markdown-powered blog with scheduled publishing works under the hood.