Firecracker

An open source virtualization technology purpose-built for launching secure, multi-tenant microVMs in fractions of a second.

Built by Amazon Web Services to power resource-intensive services like AWS Lambda and AWS Fargate, Firecracker is a minimalist virtual machine monitor (VMM) that leverages the Linux Kernel-based Virtual Machine (KVM) to spin up lightweight microVMs. It strips away legacy device drivers and non-essential guest capabilities to achieve a startup time of under 5 milliseconds and a memory footprint of just 5 megabytes per VM. This tight design allows operators to pack thousands of isolated workloads onto a single bare-metal server, combining the ironclad security of traditional hardware virtualization with the rapid deployment and low overhead of containers.

https://firecracker-microvm.github.io