Zero Trust security model primer: built on "never trust, always verify" and dismantles traditional VPN-equals-trusted perimeter thinking. Six pillars explained — identity (MFA/SAML), device health checks, least-privilege RBAC, microsegmentation mTLS, continuous trust scoring, observable audit trail — with implementation roadmap.
Production GitHub Actions pipeline from scratch: npm/pip cache, multi-version Node/Python matrix builds, Docker layer caching, Lint+Test+Build+Publish stages, conditional execution, env matrix, failure retry, and release gating best practices. Complete workflow YAML included.
Full K8s Pod state machine Pending→Terminated, PostStart/PreStop hooks, Init Container dependency guarantees, Sidecar patterns (istio-proxy, log collectors), and zero-downtime graceful termination configs.
Deep dive into Docker Compose production best practices: multi-stage builds, health checks, resource limits, logging, network isolation, and secrets management for reliable container deployments.
