Firecracker tools

Firecracker VM config and launch example

Take a look at start_vm.sh. For the bare minimum, you need to specify the kernel image and a rootfs. Common additional configs include logger, machine specs, and network. For a complete list of config options, see Firecracker API server's yaml file

Network setup

TAP devices are created and configured ahead of time. See sys_setup.sh and network_tap_setup.sh for examples.

Example rootfs

I've included the following rootfs as examples since making the right rootfs has proven to be tricky for me:

1. hello-rootfs.ext4: provided by AWS team as a toy example. Actually not a minimum rootfs. init process does quite a bit
2. iperf.rootfs.ext4: similar to hello-rootfs but added a network job (iperf) to the init process.
3. lt-rootfs.ext4: used for cold launch latency tests. Has a C program and a Python program at the end of init process writing to a magic port for time measurement.

How to tailor make a rootfs for your function

TODO