Amazon's open-source VMM behind Lambda and Fargate: KVM-backed microVMs that boot in around 125ms on a deliberately minimal device model, the jailer that wraps the hypervisor in chroot, seccomp, and cgroups for defense-in-depth, snapshotting for near-instant clones and pre-warmed pools, and the pattern for building your own multi-tenant function or sandbox runtime. Plus an honest comparison with gVisor, Kata Containers, and Cloud Hypervisor — and where each one actually fits.
Serverless
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Firecracker and the microVM -
Knative: Serverless on Your Own Cluster Knative brings the Cloud Run experience to any Kubernetes cluster: request-driven scale-to-zero via the Knative Pod Autoscaler, revision-based traffic splitting for blue-green and canary deployments, and a full CloudEvents-native eventing layer with brokers and triggers. This post covers the architecture in depth, the data path through the activator during cold start, and an honest comparison with KEDA and plain HPA — including when Knative's operational weight makes it the wrong choice.
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AWS EventBridge in Depth Event buses, schema discovery, archives and replay, Pipes for point-to-point integration, Scheduler for replacing cron jobs, cross-account routing, and real-world patterns including the saga.
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Serverless in Production: Lambda Patterns That Hold Up A practical guide to running AWS Lambda in production: the cold start problem and its real solutions, concurrency and throttling mechanics, event-driven fan-out with SQS and SNS, Step Functions for durable orchestration, API Gateway cost traps, container images vs layers, idempotency, and the patterns that break under load.
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Cloudflare Workers and the Edge: Building Globally Distributed Apps with Zero Cold Starts A comprehensive guide to Cloudflare Workers — the edge compute platform that runs JavaScript, TypeScript, Python, and Rust in 300+ locations worldwide with sub-millisecond cold starts. Covers the Workers runtime, KV, R2, D1, Durable Objects, Queues, and building production applications at the edge.
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WebAssembly Beyond the Browser: WASI, Kubernetes Sidecars, Spin, and the Future of Serverless A practical guide to server-side WebAssembly — WASI and the component model, running Wasm workloads in Kubernetes with runtimes like wasmtime and spin, Fermyon's Spin framework for serverless functions, and why Wasm may reshape the edge and serverless landscape.