How is networking usually configured at boot inside Firecracker microVMs?

[ankushT369]

I’m experimenting with Firecracker microVMs and currently configuring networking manually inside the guest (assigning IP, default route, DNS).
But I want that in boot time how can i do that!!! like more specifically I dont want to go the vm then execute commands to configure network.

[Manciukic]

Hey @ankushT369,

moving to QA Discussion.

Firecracker lets you run a virtual machine like you would do in QEMU, so the same applies there. You can have the logic integrated in the disk image (like our images https://github.com/firecracker-microvm/firecracker/blob/main/resources/overlay/usr/local/bin/fcnet-setup.sh ), or you can use the ip= boot arg to configure an IP, gateway, and DNS (https://www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt).

Thanks,
Riccardo