Dmitrii Veselov

github.com/dveselov linkedin.com/in/dmveselov

Engineer and founder of microsrv — a platform that makes cheap interruptible capacity from major clouds usable for stateful workloads. Stack: KVM/QEMU, eBPF, replicated storage, live-migration orchestration.

Writes about cloud operations, networking, and the TCO of Spot infrastructure. Posts are based on production experience; measurements and methodology are disclosed in each post’s Sources.

Talks

How to improve a cloud-native product with eBPF · RU · 2025

Talk on Knative-based serverless platforms. Why HTTP router + Activator limits platforms to HTTP, and how eBPF enables serverless scale-to-zero for any TCP without per-protocol proxies — SYN intercept in kernel, queue to userspace, autoscale via k8s, relying on TCP SYN retransmission. Demos: iPerf ~20 Gbps, Minecraft (~30 s cold start), VNC — seamless for the client. Separate architecture from microsrv’s eBPF networking (IP/socket preservation during live migration) — see blog posts.

youtube.com/watch?v=9YXPfuNJOaUlanguage: Russian

Patents

RU2851979C1 · 2025

Method and system for optimising cold start infrastructure for transport layer applications in serverless computing mode

Serverless for any TCP/UDP app — PostgreSQL, Redis, game servers — not just HTTP: eBPF agents intercept packets before the OS network stack, route by protocol and IP:port, and feed metrics to the KEDA autoscaler — cold start and scale-to-zero without proxy buffers.

Posts by author

Hermes Agent: a Self-Improving AI Agent in a Container on microsrv

Dmitrii VeselovPublishedSeptember 10, 2026

What Hermes Agent from Nous Research can do and how to run it in a container on microsrv: official image pinned by digest, gateway mode, dashboard with basic auth, and publishing via an HTTPS gateway.

Hybrid Workloads in a Single VPC: Combining Containers and VMs in microsrv

Dmitrii VeselovPublishedAugust 19, 2026UpdatedAugust 25, 2026

How to pair the density of containers with the flexibility of KVM virtual machines in a unified private network using a self-hosted Git & CI/CD stack.

Live VM Migration Explained: Moving RAM and Processes Without Downtime

Dmitrii VeselovPublishedAugust 2, 2026UpdatedAugust 9, 2026

How live migration works: pre-copy, dirty pages, stop-and-copy, cold restart as a fallback, and the way the microsrv orchestrator migrates VMs before Spot hosts are reclaimed.

Replicated VM Storage: Keeping Disks Alive When Hosts Fail

Dmitrii VeselovPublishedAugust 2, 2026UpdatedAugust 9, 2026

How ephemeral disks differ from replicated volumes, what RPO looks like after a hard failure, why synchronization must begin before migration, and how microsrv preserves filesystems when a Spot host is reclaimed.

Spot vs On-Demand: Calculating Real Savings After Interruptions

Dmitrii VeselovPublishedAugust 2, 2026UpdatedAugust 9, 2026

A TCO model for Spot and On-Demand capacity: list price, uptime, downtime costs, and operational overhead. Why a 70% raw Spot discount does not yield 70% savings in production. How microsrv delivers about 25% without rearchitecting.

SSH Without a Public IP: Why VM Access Gateways Matter

Dmitrii VeselovPublishedAugust 2, 2026UpdatedAugust 9, 2026

The risks of exposing port 22, the differences between a bastion or jump host and an SSH gateway, agent forwarding, and a stable ssh -A <vm>@msrv.space address across live migrations.

eBPF Networking in microsrv: Preserving IPs, Sockets, and Gateways During VM Migration

Dmitrii VeselovPublishedJuly 26, 2026UpdatedAugust 9, 2026

microsrv's network layer explained: decoupling guest addresses from physical hosts, isolated VPCs, SSH gateway and HTTPS gateway, and preserved TCP sessions during live migration.

What Are Preemptible (Spot) Virtual Machines? Benefits, Risks, and Architecture

Dmitrii VeselovPublishedJuly 26, 2026UpdatedAugust 9, 2026

How Spot and preemptible instances work: where discounts of up to 80% come from, how eviction notices work, what limitations apply, and how to design applications for interruptible capacity.