Add initial Ubuntu image definition
This commit is contained in:
parent
ac44b73116
commit
1a3832561a
1 changed files with 141 additions and 0 deletions
141
ubuntu-unclound-image.sh
Executable file
141
ubuntu-unclound-image.sh
Executable file
|
|
@ -0,0 +1,141 @@
|
||||||
|
#!/bin/sh
|
||||||
|
|
||||||
|
# This script generates Ubuntu images for Uncloud.
|
||||||
|
#
|
||||||
|
# Test image locally (without network) with:
|
||||||
|
# qemu-system-x86_64 -enable-kvm -m 1G -drive file=$IMAGE,format=qcow2
|
||||||
|
|
||||||
|
set -e
|
||||||
|
set -x
|
||||||
|
|
||||||
|
# XXX: Handle command-line arguments?
|
||||||
|
RELEASE=eoan # 19.10
|
||||||
|
ARCH=amd64
|
||||||
|
IMAGE_PATH=ubuntu-$RELEASE-$(date --iso-8601).img.qcow2
|
||||||
|
IMAGE_SIZE=10G
|
||||||
|
NBD_DEVICE=/dev/nbd0
|
||||||
|
|
||||||
|
cleanup() {
|
||||||
|
# The order here is important.
|
||||||
|
umount /mnt/dev/pts 2>/dev/null || true
|
||||||
|
umount /mnt/dev/shm 2>/dev/null || true
|
||||||
|
umount /mnt/dev 2>/dev/null || true
|
||||||
|
umount /mnt/proc 2>/dev/null || true
|
||||||
|
umount /mnt/run 2>/dev/null || true
|
||||||
|
umount /mnt/sys 2>/dev/null || true
|
||||||
|
umount /mnt/boot 2>/dev/null || true
|
||||||
|
umount /mnt 2>/dev/null || true
|
||||||
|
qemu-nbd --disconnect "$NBD_DEVICE" || true
|
||||||
|
}
|
||||||
|
|
||||||
|
run_root() {
|
||||||
|
chroot /mnt /usr/bin/env \
|
||||||
|
PATH=/sbin:/usr/sbin:/bin:/usr/bin \
|
||||||
|
sh -c "$*"
|
||||||
|
}
|
||||||
|
|
||||||
|
if [ "$(whoami)" != 'root' ]; then
|
||||||
|
echo "This script must be run as root." >&2
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
|
||||||
|
if [ $(lsb_release --short --id) != "Ubuntu" ]; then
|
||||||
|
echo "WARNING: this script has been designed to run on an Ubuntu system." >&2
|
||||||
|
echo "WARNING: Not running Ubuntu. Giving you 5 seconds to abort." >&2
|
||||||
|
sleep 5
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Create base QCOW2 image.
|
||||||
|
qemu-img create -f qcow2 "$IMAGE_PATH" "$IMAGE_SIZE"
|
||||||
|
modprobe nbd max_part=16
|
||||||
|
qemu-nbd --connect="$NBD_DEVICE" "$IMAGE_PATH"
|
||||||
|
|
||||||
|
# Wait for qemu-nbd to settle.
|
||||||
|
sleep 1
|
||||||
|
|
||||||
|
# Don't forget to cleanup, even if the script crash.
|
||||||
|
trap cleanup EXIT
|
||||||
|
|
||||||
|
# Create partition table, format partitions.
|
||||||
|
sfdisk --no-reread "$NBD_DEVICE" <<EOF
|
||||||
|
1M,500M,L,*
|
||||||
|
,,L
|
||||||
|
EOF
|
||||||
|
|
||||||
|
mkfs.ext4 "${NBD_DEVICE}p1"
|
||||||
|
mkfs.ext4 "${NBD_DEVICE}p2"
|
||||||
|
|
||||||
|
# Mount partitions, install base OS.
|
||||||
|
|
||||||
|
mount "${NBD_DEVICE}p2" /mnt
|
||||||
|
mkdir /mnt/boot
|
||||||
|
mount "${NBD_DEVICE}p1" /mnt/boot
|
||||||
|
|
||||||
|
debootstrap \
|
||||||
|
--arch=$ARCH $RELEASE \
|
||||||
|
/mnt http://archive.ubuntu.com/ubuntu/
|
||||||
|
|
||||||
|
mount --bind /dev /mnt/dev
|
||||||
|
mount --bind /dev/pts /mnt/dev/pts
|
||||||
|
mount --bind /dev/shm /mnt/dev/shm
|
||||||
|
mount --bind /proc /mnt/proc
|
||||||
|
mount --bind /run /mnt/run
|
||||||
|
mount --bind /sys /mnt/sys
|
||||||
|
|
||||||
|
# Required to resolve package mirror in chroot.
|
||||||
|
cp /etc/resolv.conf /mnt/etc/resolv.conf
|
||||||
|
|
||||||
|
# Initialize /etc/hosts.
|
||||||
|
cat > /mnt/etc/hosts << EOF
|
||||||
|
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
|
||||||
|
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
|
||||||
|
|
||||||
|
EOF
|
||||||
|
|
||||||
|
# Configure package sources and update package index.
|
||||||
|
cat >/mnt/etc/apt/sources.list <<EOF
|
||||||
|
deb http://archive.ubuntu.com/ubuntu/ $RELEASE main restricted universe multiverse
|
||||||
|
deb http://archive.ubuntu.com/ubuntu/ $RELEASE-security main restricted universe multiverse
|
||||||
|
deb http://archive.ubuntu.com/ubuntu/ $RELEASE-updates main restricted universe multiverse
|
||||||
|
deb http://archive.ubuntu.com/ubuntu/ $RELEASE-backports main restricted universe multiverse
|
||||||
|
EOF
|
||||||
|
run_root apt-get update
|
||||||
|
|
||||||
|
# Install RDNSSD for DNS discovery from router advertisement. The service is enabled by default.
|
||||||
|
run_root apt-get install rdnssd
|
||||||
|
|
||||||
|
# Initialize base services.
|
||||||
|
run_root systemd-machine-id-setup
|
||||||
|
|
||||||
|
run_root ln -sf /usr/share/zoneinfo/UTC /etc/localtime
|
||||||
|
run_root systemctl enable systemd-timesyncd.service
|
||||||
|
|
||||||
|
# Install kernel and bootloader. Do not autoconfigure grub.
|
||||||
|
run_root echo "grub-pc grub-pc/install_devices_empty boolean true" | debconf-set-selections
|
||||||
|
run_root DEBIAN_FRONTEND=noninteractive apt-get -y install locales linux-base linux-image-generic grub-pc
|
||||||
|
|
||||||
|
# Configure grub.
|
||||||
|
run_root grub-install --target=i386-pc "${NBD_DEVICE}"
|
||||||
|
run_root grub-mkconfig -o /boot/grub/grub.cfg
|
||||||
|
|
||||||
|
# Install en configure SSH daemon. The service is enabled by default.
|
||||||
|
run_root apt-get -y install openssh-server
|
||||||
|
|
||||||
|
# Generate fstab file.
|
||||||
|
boot_uuid=$(blkid --match-tag UUID --output value "${NBD_DEVICE}p1")
|
||||||
|
root_uuid=$(blkid --match-tag UUID --output value "${NBD_DEVICE}p2")
|
||||||
|
cat >>/mnt/etc/fstab <<EOF
|
||||||
|
UUID=$boot_uuid /boot ext4 rw,relatime,data=ordered 0 2
|
||||||
|
UUID=$root_uuid / ext4 rw,relatime,data=ordered 0 1
|
||||||
|
EOF
|
||||||
|
|
||||||
|
# Reset systemd's environment.
|
||||||
|
run_root rm -f /etc/machine-id
|
||||||
|
run_root touch /etc/machine-id
|
||||||
|
rm -f /var/lib/systemd/random-seed
|
||||||
|
|
||||||
|
# Remove temporary files and reclaim freed disk space.
|
||||||
|
run_root apt-get clean
|
||||||
|
|
||||||
|
# Make sure everything is written to disk before exiting.
|
||||||
|
sync
|
||||||
Loading…
Reference in a new issue