OSv is an open-source versatile modular unikernel designed to run single unmodified Linux application securely as microVM on top of a hypervisor, when compared to traditional operating systems which were designed for a vast range of physical machines. Built from the ground up for effortless deployment and management of microservices and serverless apps, with superior performance.
OSv has been designed to run unmodified x86-64 and AArch64 Linux binaries as is, which effectively makes it a Linux binary compatible unikernel (for more details about Linux ABI compatibility please read this doc). In particular OSv can run many managed language runtimes including JVM, Python, Node.JS, Ruby, Erlang, and applications built on top of those runtimes. It can also run applications written in languages compiling directly to native machine code like C, C++, Golang and Rust as well as native images produced by GraalVM and WebAssembly/Wasmer.
OSv can boot as fast as ~5 ms on Firecracker using as low as 15 MB of memory. OSv can run on many hypervisors including QEMU/KVM, Firecracker, Cloud Hypervisor, Xen, VMWare, VirtualBox and Hyperkit as well as open clouds like AWS EC2, GCE and OpenStack.
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