arch linux LXD stuff

lxd-common

_source() {
    source ${BASE_DIR}/lxd/lxd-common
}

#======================
# General VM functions

vm_bash() {
    lxc exec "$VMNAME" -- bash "$@"
}

vm_exec() {
    lxc exec "$VMNAME" -- "$@"
}

vm_start() {
    lxc start "$VMNAME"
}

vm_start_console() {
    lxc start "$VMNAME" --console=vga
}

vm_console() {
    lxc console "$VMNAME" --type vga
}

vm_wait() {
    sleep 2
    until vm_exec true
    do
        sleep 1
    done
    sleep 2
}

vm_status() {
    lxc info "$VMNAME" | grep "^Status: " | awk '{ print $2 }'
}

vm_stop() {
    timeout 5 lxc stop "$VMNAME" || \
        sleep 1 && lxc stop -f "$VMNAME" || true
    vm_status | grep -q "STOPPED"
}

vm_restart() {
    #timeout 5 lxc restart "$VMNAME" || \
    #    sleep 1 && lxc restart -f "$VMNAME"
    vm_stop
    vm_start
}

vm_delete() {
    lxc delete -f "$VMNAME"
}

vm_create() {
    lxc init images:archlinux "$VMNAME" --vm \
        -c security.secureboot=false \
        -c limits.memory=16GiB \
        -c limits.cpu=$(nproc)
}

#==============================
# Project specific: Attaching storage, installing dependencies and zfs

vm_create_storage() {
    # lxc storage volume create default disk-arch-gen-work size=10GiB --type=block
    # lxc storage volume create default disk-arch-gen-usb size=4GiB --type=block
    # Names can't be this long https://github.com/canonical/lxd/issues/12152

    lxc storage volume create default agwork size=20GiB --type=block
    lxc storage volume create default agusb size=4GiB --type=block
}

vm_attach_storage() {
    lxc config device add "$VMNAME" disk-repo disk "source=${BASE_DIR}" "path=${VM_BASE_DIR}" readonly=true
    lxc config device add "$VMNAME" disk-repo-work disk "source=${BASE_DIR}/work" "path=${VM_BASE_DIR}/work" readonly=false

    lxc storage volume attach default agwork "$VMNAME"
    lxc storage volume attach default agusb "$VMNAME"
}

vm_detach_storage() {
    lxc config device remove "$VMNAME" disk-repo
    lxc config device remove "$VMNAME" disk-repo-work
    lxc storage volume detach default agwork "$VMNAME"
    lxc storage volume detach default agusb "$VMNAME"
}

vm_destroy_storage() {
    lxc storage volume delete default agwork
    lxc storage volume delete default agusb
}

vm_detect_storage() {
    # lxc exec "$VMNAME" -- ls /dev/disk/by-id
    disk_work="$(vm_exec find /dev/disk/by-id | grep "_agwork" | grep -vF -- "-part")"
    disk_usb="$(vm_exec find /dev/disk/by-id | grep "_agusb"  | grep -vF -- "-part")"
    echo "$disk_work"
    echo "$disk_usb"
}

vm_update() {
    lxc file push /etc/pacman.d/mirrorlist "${VMNAME}/etc/pacman.d/mirrorlist"
    vm_exec sed -i '/^#*ParallelDownloads.*/c\ParallelDownloads = 5' /etc/pacman.conf
    vm_bash << 'EOF'
pacman -R --noconfirm linux
pacman -Syu --noconfirm --needed linux-lts linux-lts-headers  # For ZFS

pacman -Syu --noconfirm --needed gptfdisk parted dosfstools   # For disk management
pacman -S --noconfirm --needed arch-install-scripts           # for arch-chroot
pacman -S --noconfirm --needed rsync
pacman -S --noconfirm --needed git

grub-mkconfig -o /boot/grub/grub.cfg
EOF

    vm_restart
    vm_wait
}

vm_install_zfs() {
    vm_bash << 'EOF'
if ! grep -qF "[archzfs]" /etc/pacman.conf; then
    cat >> /etc/pacman.conf << FOE
[archzfs]
Server = http://archzfs.com/\$repo/x86_64
Server = http://mirror.sum7.eu/archlinux/archzfs/\$repo/x86_64
Server = https://mirror.biocrafting.net/archlinux/archzfs/\$repo/x86_64
FOE
fi

pacman-key -r F75D9D76
pacman-key --lsign-key F75D9D76
pacman -Syyu --noconfirm
pacman -S --noconfirm zfs-dkms zfs-utils 

rm -rf /root/zfs.tar
dkms mktarball zfs/$(ls /var/lib/dkms/zfs | grep -v kernel) --archive /root/zfs.tar

modprobe zfs
EOF
}

Setup VM

vm_stop
vm_delete
vm_create
vm_attach_storage
vm_start
vm_wait
vm_detect_storage
vm_update
vm_install_zfs

vm_exec cat "$disk_work" | pv > ~/disk.img