New Posts
How to Configure Applications for High Availability in Kubernetes
Pods are ephemeral. Stay available with graceful SIGTERM handling, health probes, PodDisruptionBudgets, anti-affinity, autoscaling, and monitoring.
A Brilliant Hack: Why does Layer 2/3 Checksum use 1’s Complement, Not 2’s
One's complement sums are endianness-independent, so routers verify checksums without ntohs and htons swaps; receivers simply check for all ones.
Service API Changes: Prefer Blue-green Update to Rolling Update
Kubernetes rolling updates mix old and new servers, so API changes must be forward compatible too. Blue-green updates need only backward compatibility.
CD Tricks for Kubernetes Deployment + ConfigMap
Two kubectl tricks: update a ConfigMap from file via dry-run piped to apply, and use a CONFIG_HASH env var so config edits trigger a zero-downtime rollout.
JWT + Third-party Oauth in Single Page App
Returning a JWT to a single page app after OAuth login: why session cookies and URL params fall short, and a tiny HTML page that saves it to localStorage.
Docker Multi-stage Build: Fast, Minimal and Secure Images
Docker multi-stage builds run independent stages in parallel, shrink images without chaining RUN commands, and keep private-repo SSH keys out of the image.
Never miss a story from me, subscribe to my newsletter