Containers, orchestration, cloud infrastructure, and the practices that keep production reliable.
How Kubernetes classifies API requests, assigns concurrency seats, queues flows with shuffle sharding, and preserves control-plane access during overload.
How Kubernetes Lease objects carry node heartbeats and leader state, how clients renew them, and why a lease alone cannot fence a stale writer.
How native histograms store a distribution in one structured sample, how PromQL aggregates it, and how to migrate without breaking dashboards or remote write.
How to design, bind, stage, observe, and safely enforce in-process Kubernetes admission rules with ValidatingAdmissionPolicy and CEL.
How OCI image indexes connect platform descriptors to immutable manifests, and how runtimes select, verify, publish, and debug multi-platform images.
A safe namespace-termination investigation covering discovery failures, remaining objects, finalizers, APIService health, and last-resort finalization.
How to identify high-cardinality metrics and labels, stop unsafe ingestion, preserve evidence, and redesign instrumentation without masking outages.
How GitHub's OIDC tokens, cloud trust policies, audience and subject claims replace static CI keys while keeping workflows and environments constrained.
A deterministic Argo CD rollout using phases, integer waves, health gates, idempotent hooks, selective-sync caveats, and observable failure recovery.
A fail-safe Sigstore workflow for signing immutable image digests, constraining identities, enforcing admission policy, and preserving rollback access.