-
-
Save jvns/c8470e75af67deec2e91ff1bd9883e53 to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| set -eu | |
| [ -e hello-vmlinux.bin ] || wget https://s3.amazonaws.com/spec.ccfc.min/img/hello/kernel/hello-vmlinux.bin | |
| [ -e hello-rootfs.ext4 ] || wget -O hello-rootfs.ext4 https://raw.githubusercontent.com/firecracker-microvm/firecracker-demo/ec271b1e5ffc55bd0bf0632d5260e96ed54b5c0c/xenial.rootfs.ext4 | |
| [ -e hello-id_rsa ] || wget -O hello-id_rsa https://raw.githubusercontent.com/firecracker-microvm/firecracker-demo/ec271b1e5ffc55bd0bf0632d5260e96ed54b5c0c/xenial.rootfs.id_rsa | |
| TAP_DEV="fc-88-tap0" | |
| # set up the kernel boot args | |
| MASK_LONG="255.255.255.252" | |
| MASK_SHORT="/30" | |
| FC_IP="169.254.0.21" | |
| TAP_IP="169.254.0.22" | |
| FC_MAC="02:FC:00:00:00:05" | |
| KERNEL_BOOT_ARGS="ro console=ttyS0 noapic reboot=k panic=1 pci=off nomodules random.trust_cpu=on" | |
| KERNEL_BOOT_ARGS="${KERNEL_BOOT_ARGS} ip=${FC_IP}::${TAP_IP}:${MASK_LONG}::eth0:off" | |
| ip link del "$TAP_DEV" 2> /dev/null || true | |
| ip tuntap add dev "$TAP_DEV" mode tap | |
| sysctl -w net.ipv4.conf.${TAP_DEV}.proxy_arp=1 > /dev/null | |
| sysctl -w net.ipv6.conf.${TAP_DEV}.disable_ipv6=1 > /dev/null | |
| ip addr add "${TAP_IP}${MASK_SHORT}" dev "$TAP_DEV" | |
| ip link set dev "$TAP_DEV" up | |
| cat <<EOF > vmconfig.json | |
| { | |
| "boot-source": { | |
| "kernel_image_path": "hello-vmlinux.bin", | |
| "boot_args": "$KERNEL_BOOT_ARGS" | |
| }, | |
| "drives": [ | |
| { | |
| "drive_id": "rootfs", | |
| "path_on_host": "hello-rootfs.ext4", | |
| "is_root_device": true, | |
| "is_read_only": false | |
| } | |
| ], | |
| "network-interfaces": [ | |
| { | |
| "iface_id": "eth0", | |
| "guest_mac": "$FC_MAC", | |
| "host_dev_name": "$TAP_DEV" | |
| } | |
| ], | |
| "machine-config": { | |
| "vcpu_count": 2, | |
| "mem_size_mib": 1024, | |
| "ht_enabled": false | |
| } | |
| } | |
| EOF | |
| firecracker --no-api --config-file vmconfig.json |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Folks that are really struggling with these old examples, should take a look at my Firecracker lab..
https://github.com/alexellis/firecracker-init-lab (completely free)
And if you want to cut out a lot of the low-level Linux primitives, and work straight with a stable, production-ready API with networking, we have that in https://slicervm.com - created in 2022 spun out from our work on actuated (CI runners for GitHub/GitLab/Jenkins.. etc).
The slicer video also has a microVMs section with three of my best video explainers/webinars.
Alex