Every article tagged Reliability, in one place.
Showing 6 articles
A client sends POST /payments , the network times out, and it retries. Did the first request succeed? Without protection, the customer may be charged twice. Idempotency keys make retries safe. The contract POST /payments Idempotency-Key: 7f3b2c1e-9a4d-4e8b-a1f...
Probes tell Kubernetes about the health of each container. Configured well, they give you zero-downtime deploys and self-healing. Configured badly, they can restart healthy Pods in a loop and turn a small issue into an outage. The three probes Readiness - "can...
"Make it reliable" isn't a goal you can measure. Service level objectives turn reliability into a number that product and engineering can agree on. The terms SLI (indicator) - a measurement of user experience, usually a ratio of good events to total events. Ex...
A running process isn't necessarily a working one. It might be deadlocked, out of database connections or stuck in a crash loop. Health checks and restart policies help Docker notice and react. HEALTHCHECK in a Dockerfile HEALTHCHECK --interval=30s --timeout=3...
Redis keeps data in memory. Whether anything survives a restart depends on its persistence settings, and the right choice depends on how you use Redis. RDB: point-in-time snapshots # redis.conf save 3600 1 # snapshot if at least 1 change in an hour save 300 10...
Kubernetes Deployments roll out new versions gradually by default. But "gradual" isn't automatically "zero downtime": dropped connections during shutdown are the usual culprit. These settings close the gaps. 1. Rolling update strategy spec: replicas: 4 strateg...
