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vmbuilder for gyf304 / vmcli
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#!/bin/bash | |
set -e | |
# this script creates a ubuntu VM which the current user's | |
# username and ssh public key. | |
# uncomment the following line to keep temp files | |
skip_cleanup=1 | |
# disk size, default to 4096 mb | |
disk_size=4096 # 4096 MB | |
# write default config, change if needed | |
cat << EOF > vm.conf | |
kernel=vmlinux | |
initrd=initrd | |
cmdline=console=hvc0 irqfixup root=/dev/vda | |
cpu-count=1 | |
memory-size=1024 | |
disk=disk.img | |
cdrom=seed.iso | |
network=nat | |
EOF | |
arch="$(/usr/bin/uname -m)" | |
if [ "$arch" = "x86_64" ]; then | |
arch="amd64" | |
fi | |
if [ ! -e ~/.ssh/id_rsa.pub ]; then | |
echo "cannot find ~/.ssh/id_rsa.pub, stop" >&2 | |
exit 1 | |
fi | |
# download files | |
if [ "$arch" = "amd64" ]; then | |
/usr/bin/curl -C - -o vmlinux "https://cloud-images.ubuntu.com/releases/focal/release/unpacked/ubuntu-20.04-server-cloudimg-$arch-vmlinuz-generic" | |
else | |
/usr/bin/curl -C - -o vmlinux.gz "https://cloud-images.ubuntu.com/releases/focal/release/unpacked/ubuntu-20.04-server-cloudimg-$arch-vmlinuz-generic" | |
gunzip vmlinux.gz | |
fi | |
/usr/bin/curl -C - -o initrd "https://cloud-images.ubuntu.com/releases/focal/release/unpacked/ubuntu-20.04-server-cloudimg-$arch-initrd-generic" | |
/usr/bin/curl -C - -o disk.tar.gz "https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-$arch.tar.gz" | |
tar xzvf disk.tar.gz | |
mv "focal-server-cloudimg-$arch.img" disk.img | |
rm README | |
# create cloudinit config | |
rm -f seed.iso | |
mkdir iso_folder | |
cat << EOF > iso_folder/user-data | |
#cloud-config | |
users: | |
- default | |
- name: $USER | |
lock_passwd: False | |
gecos: $USER | |
groups: [adm, audio, cdrom, dialout, dip, floppy, lxd, netdev, plugdev, sudo, video] | |
sudo: ["ALL=(ALL) NOPASSWD:ALL"] | |
shell: /bin/bash | |
ssh-authorized-keys: | |
- $(cat ~/.ssh/id_rsa.pub | head -n 1) | |
bootcmd: | |
- apt remove -y irqbalance | |
network: | |
version: 2 | |
renderer: networkd | |
ethernets: | |
enp0s1: | |
dhcp4: true | |
EOF | |
touch iso_folder/meta-data | |
hdiutil makehybrid -iso -joliet -iso-volume-name cidata -joliet-volume-name cidata -o seed.iso iso_folder | |
rm -rf iso_folder | |
# expand disk to 4GB | |
/bin/dd if=/dev/null of=disk.img bs=1m count=0 seek="$disk_size" | |
# perform clean up | |
if [ "$skip_cleanup" != "" ]; then | |
exit 0 | |
fi | |
rm disk.tar.gz |
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