firecracker-netns/rootfs-kernel/arch-rootfs.sh
RouxAntoine a2b5884726 feature: build and use rootf dynamically and use kernel
support rootfs :
- archlinux
- ubuntu
kernel 5.10.204 from url amazon url
Co-authored-by: RouxAntoine <antoinroux@hotmail.fr>
Co-committed-by: RouxAntoine <antoinroux@hotmail.fr>
2024-01-06 13:25:47 +00:00

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1.5 KiB
Bash
Executable File

#!/usr/bin/env bash
# inspired by https://github.com/oraoto/archlinux-firecracker/blob/master/scripts/build-arch-rootfs.sh
set -ex
DISK_SIZE=10G
DISK_FILE=../out/arch-rootfs.ext4
DISK_ROOT=../out/mount
# Allocate rootfs disk
fallocate -l "$DISK_SIZE" "$DISK_FILE"
mkfs.ext4 -F $DISK_FILE
# Mount rootfs to mount
mkdir -p $DISK_ROOT
sudo mount $DISK_FILE $DISK_ROOT
sudo pacstrap -c $DISK_ROOT bash filesystem systemd-sysvcompat pacman iproute2 openssh git vim
echo "nameserver 1.1.1.1" | sudo tee $DISK_ROOT/etc/resolv.conf
sudo tee $DISK_ROOT/etc/systemd/system/internal-network.service <<-'EOF'
[Unit]
Description=Internal Network
[Service]
Type=oneshot
ExecStart=ip link set eth0 up
ExecStart=ip addr add 172.16.0.2/24 dev eth0
ExecStart=ip route add default via 172.16.0.1 dev eth0
RemainAfterExit=yes
[Install]
WantedBy=multi-user.target
EOF
sudo ln -s /etc/systemd/system/internal-network.service $DISK_ROOT/etc/systemd/system/multi-user.target.wants/
sudo ln -s /usr/lib/systemd/system/sshd.service $DISK_ROOT/etc/systemd/system/multi-user.target.wants/
# allow root login with empty password, unsafe !
sudo tee $DISK_ROOT/etc/ssh/sshd_config.d/98-archlinux.conf <<-'EOF'
PermitEmptyPasswords yes
PermitRootLogin yes
EOF
# Remove default (locked) root password
# See https://github.com/archlinux/svntogit-packages/commit/0320c909f3867d47576083e853543bab1705185b
sudo sed 's/^root:.*/root::14871::::::/' -i $DISK_ROOT/etc/shadow
sudo umount $DISK_ROOT
rmdir $DISK_ROOT