Kubernetes Native Sidecars: Fix Startup Order
Kubernetes native sidecars are init containers that keep running. They start before your app, restart on their own, and get shut down last. Here is how.
#Reliability(7)
PodDisruptionBudgets: Survive a Node Drain
A cluster upgrade drains a node and evicts every replica of your service at once. How a PodDisruptionBudget caps voluntary disruptions and keeps you online.
Idempotency Keys: Safe API Retries in FastAPI
A network retry can submit the same request twice. How idempotency keys in FastAPI make POST endpoints safe to retry without duplicate side effects.
OpenSearch ISM: Automate Index Rollover
Log indexes grow until a data node runs out of disk. How OpenSearch ISM rolls indexes over by size, ages them through hot and warm, then deletes on schedule.
Circuit Breakers for LLM API Calls
When an LLM provider degrades, retries make it worse. A practical guide to adding a circuit breaker in Python: the three states, tuning, and failure modes.
Kubernetes OOMKilled: Requests vs Limits
Your pod died with OOMKilled and exit 137. What Kubernetes memory requests and limits actually do, what triggers the kill, and how to stop it happening.
Kubernetes Probes: Liveness, Readiness, Startup
Kubernetes has three health probes and mixing them up causes outages. How liveness, readiness, and startup probes work, and the failure modes to avoid.