Run a single command in a virtual machine with zero-setup and great performance
vmexec is a zero-setup CLI tool that runs single commands in a throwaway virtual machines. The idea is for you to run a command a command in VM without having think about the performance implications, how to mount files, how to forward ports, etc.
Nowadays, many are used to the convenience of container runners such as podman or docker but so far it hasn't been as covenient to run a VM, often requiring a manual set up step.
It has a docker run-inspired interface that many should already be familiar with.
- virtiofsd
- QEMU
It is strongly encouraged to enable KSM in your kernel in order to allow for multiple similar VMs to share their pages, thereby strongly cutting their memory costs.
To temporarily enable KSM, you can do this as root:
echo 1 > /sys/kernel/mm/ksm/run
However, you are advised to enable this permanently by running
vmexec ksm enable
as root.
- Document/bench KSM
- Better README