I am playing around with firecrackver VMM. I have extracted rootfs from a python docker image like this.
docker export $(docker create python:latest) --output="python.tar" mkdir python tar -xf python.tar -C python/ dd if=/dev/zero of=python.ext4 bs=1M count=1500 mkfs.ext4 python.ext4 mkdir python-mnt sudo mount python.ext4 python-mnt sudo cp -r python/* python-mnt/ sudo umount python-mnt I am using the kernel that is provided in the firecracker readme.
If I try running this sudo ./firecracker --api-sock "fc1.socket" --config-file vmconfig.json I will get kernel panic because it cant find init system.
I compiled suckless init (sinit) and tried using that but my vm doesnt start. I might be doing something wrong with my config file
{ "boot-source": { "kernel_image_path": "vmlinux", "boot_args": "console=ttyS0 reboot=k panic=1 pci=off " }, "drives": [ { "drive_id": "init", "is_root_device": false, "is_read_only": false, "path_on_host": "sinit" }, { "drive_id": "rootfs", "is_root_device": true, "is_read_only": false, "path_on_host": "python.ext4" } ], "machine-config": { "vcpu_count": 2, "mem_size_mib": 1024, "smt": false, "track_dirty_pages": false, "huge_pages": "None" }, "cpu-config": null, "balloon": null, "network-interfaces": [], "vsock": null, "logger": null, "metrics": null, "mmds-config": null, "entropy": null } I have two drives here because I am following https://github.com/superfly/init-snapshot/blob/public/README.md this example. It has not worked so I thought of starting with a simple init.
PS: I am very new to this subject and I am interested to learn more. I might have asked a very stupid question and please point me to resources where I can learn about it.
