Merge pull request #190 from saveriomiroddi/nested_datasets
Add support for datasets
This commit is contained in:
Saverio Miroddi
GitHub
commit
f7cc468540
11
README.md
11
README.md
@ -38,19 +38,14 @@ As of 20.04, Canonical makes available an experimental ZFS installer on Ubuntu D
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The advantages of this project over the Ubuntu installer are:
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1. it supports pools configuration;
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1. it allows specifying the RAID type;
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1. it allows customization of the disk partitions;
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1. it allows configuring pools, datasets and the RAID type;
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1. it allows customizing the disk partitions;
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1. it supports additional features (e.g. encryption and trimming);
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1. it supports new OpenZFS versions, via PPA `jonathonf/zfs`.
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1. it supports newer OpenZFS versions, via PPA `jonathonf/zfs`.
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1. it supports many more operating systems;
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1. it supports unattended installations, via custom scripts;
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1. it's easy to extend.
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The disadvantages are:
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1. the Ubuntu installer has a more sophisticated filesystem layout - it separates base directories into different ZFS filesystems (this is planned to be implemented in the ZFS installer as well).
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## Instructions
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Start the live CD of a supported Linux distribution, then open a terminal and execute:
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183
install-zfs.sh
183
install-zfs.sh
@ -26,6 +26,7 @@ v_passphrase=
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v_root_password= # Debian-only
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v_rpool_name=
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v_rpool_create_options= # array; see defaults below for format
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v_dataset_create_options= # string; see help for format
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v_pools_raid_type=()
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declare -a v_selected_disks # (/dev/by-id/disk_id, ...)
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v_swap_size= # integer
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@ -83,8 +84,40 @@ c_default_rpool_create_options=(
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-O xattr=sa
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-O devices=off
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)
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c_dataset_options_help='# The defaults create a root pool similar to the Ubuntu default; see the script help for details.
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# Double quotes are forbidden; lines starting with a hash (`#`) are ignored.
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# Parameters and command substitutions are applied; useful variables are $c_zfs_mount_dir and $v_rpool_name.
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'
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# Can't include double quotes, due to the templating logic.
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#
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c_default_dataset_create_options='
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ROOT mountpoint=/ com.ubuntu.zsys:bootfs=yes com.ubuntu.zsys:last-used=$(date +%s)
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ROOT/srv com.ubuntu.zsys:bootfs=no
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ROOT/usr canmount=off com.ubuntu.zsys:bootfs=no
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ROOT/usr/local
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ROOT/var canmount=off com.ubuntu.zsys:bootfs=no
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ROOT/var/games
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ROOT/var/lib
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ROOT/var/lib/AccountsService
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ROOT/var/lib/apt
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ROOT/var/lib/dpkg
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ROOT/var/lib/NetworkManager
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ROOT/var/log
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ROOT/var/mail
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ROOT/var/snap
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ROOT/var/spool
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ROOT/var/www
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ROOT/tmp com.ubuntu.zsys:bootfs=no
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USERDATA mountpoint=/ canmount=off
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USERDATA/root mountpoint=/root canmount=on com.ubuntu.zsys:bootfs-datasets=$v_rpool_name/ROOT
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$(find $c_installed_os_mount_dir/home -mindepth 1 -maxdepth 1 -printf '\''
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USERDATA/%P mountpoint=/home/%P canmount=on com.ubuntu.zsys:bootfs-datasets=$v_rpool_name/%P
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'\'')
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'
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c_zfs_mount_dir=/mnt
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c_installed_os_data_mount_dir=/target
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c_installed_os_mount_dir=/target
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declare -A c_supported_linux_distributions=([Ubuntu]="18.04 20.04" [UbuntuServer]="18.04 20.04" [LinuxMint]="19.1 19.2 19.3" [Linuxmint]="20 20.1" [elementary]=5.1)
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c_temporary_volume_size=12 # gigabytes; large enough - Debian, for example, takes ~8 GiB.
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c_passphrase_named_pipe=$(dirname "$(mktemp)")/zfs-installer.pp.fifo
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@ -236,6 +269,7 @@ The procedure can be entirely automated via environment variables:
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- ZFS_BPOOL_CREATE_OPTIONS : boot pool options to set on creation (see defaults below)
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- ZFS_RPOOL_CREATE_OPTIONS : root pool options to set on creation (see defaults below)
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- ZFS_POOLS_RAID_TYPE : options: blank (striping), `mirror`, `raidz`, `raidz2`, `raidz3`; if unset, it will be asked.
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- ZFS_DATASET_CREATE_OPTIONS : see explanation below
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- ZFS_NO_INFO_MESSAGES : set 1 to skip informational messages
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- ZFS_SWAP_SIZE : swap size (integer); set 0 for no swap
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- ZFS_FREE_TAIL_SPACE : leave free space at the end of each disk (integer), for example, for a swap partition
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@ -251,6 +285,19 @@ When installing the O/S via $ZFS_OS_INSTALLATION_SCRIPT, the root pool is mounte
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Boot pool default create options: '"${c_default_bpool_create_options[*]/#-/$'\n' -}"'
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Root pool default create options: '"${c_default_rpool_create_options[*]/#-/$'\n' -}"'
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The root pool dataset creation options can be specified by passing a string of whom each line has:
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- the dataset name (without the pool)
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- the options (without `-o`)
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The defaults, which create a root pool similar to the Ubuntu default, are:
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'"$(echo -n "$c_default_dataset_create_options" | sed 's/^/ /')"'
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Double quotes are forbidden. Parameters and command substitutions are applied; useful variables are $c_zfs_mount_dir and $v_rpool_name.
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Datasets are created after the operating system is installed; at that stage, it'\'' mounted in the directory specified by $c_zfs_mount_dir.
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'
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echo "$help"
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@ -308,7 +355,7 @@ function check_prerequisites {
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elif [[ $(id -u) -ne 0 ]]; then
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echo 'This script must be run with administrative privileges!'
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exit 1
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elif [[ "${ZFS_OS_INSTALLATION_SCRIPT:-}" != "" && ! -x "$ZFS_OS_INSTALLATION_SCRIPT" ]]; then
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elif [[ -n ${ZFS_OS_INSTALLATION_SCRIPT:-} && ! -x $ZFS_OS_INSTALLATION_SCRIPT ]]; then
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echo "The custom O/S installation script provided doesn't exist or is not executable!"
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exit 1
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elif [[ ! -v c_supported_linux_distributions["$v_linux_distribution"] ]]; then
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@ -337,7 +384,7 @@ This script will prepare the ZFS pools on the system, install Ubuntu, and config
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In order to stop the procedure, hit Esc twice during dialogs (excluding yes/no ones), or Ctrl+C while any operation is running.
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'
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if [[ ${ZFS_NO_INFO_MESSAGES:-} == "" ]]; then
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if [[ -z ${ZFS_NO_INFO_MESSAGES:-} ]]; then
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whiptail --msgbox "$dialog_message" 30 100
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fi
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}
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@ -524,8 +571,14 @@ export ZFS_FREE_TAIL_SPACE=12
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trap _exit_hook EXIT
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}
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# Whiptail's lack of multiline editing is quite painful.
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#
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function install_dialog_package {
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apt install -y dialog
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}
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function select_disks {
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if [[ "${ZFS_SELECTED_DISKS:-}" != "" ]]; then
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if [[ -n ${ZFS_SELECTED_DISKS:-} ]]; then
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mapfile -d, -t v_selected_disks < <(echo -n "$ZFS_SELECTED_DISKS")
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else
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while true; do
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@ -608,13 +661,13 @@ function select_pools_raid_type {
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function ask_root_password_Debian {
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set +x
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if [[ ${ZFS_DEBIAN_ROOT_PASSWORD:-} != "" ]]; then
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if [[ -n ${ZFS_DEBIAN_ROOT_PASSWORD:-} ]]; then
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v_root_password="$ZFS_DEBIAN_ROOT_PASSWORD"
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else
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local password_invalid_message=
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local password_repeat=-
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while [[ "$v_root_password" != "$password_repeat" || "$v_root_password" == "" ]]; do
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while [[ $v_root_password != "$password_repeat" || -z $v_root_password ]]; do
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v_root_password=$(whiptail --passwordbox "${password_invalid_message}Please enter the root account password (can't be empty):" 30 100 3>&1 1>&2 2>&3)
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password_repeat=$(whiptail --passwordbox "Please repeat the password:" 30 100 3>&1 1>&2 2>&3)
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@ -655,7 +708,7 @@ Leave blank to keep encryption disabled.
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}
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function ask_boot_partition_size {
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if [[ ${ZFS_BOOT_PARTITION_SIZE:-} != "" ]]; then
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if [[ -n ${ZFS_BOOT_PARTITION_SIZE:-} ]]; then
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v_boot_partition_size=$ZFS_BOOT_PARTITION_SIZE
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else
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local boot_partition_size_invalid_message=
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@ -673,7 +726,7 @@ Supported formats: '512M', '3G'" 30 100 ${c_default_boot_partition_size}M 3>&1 1
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}
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function ask_swap_size {
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if [[ ${ZFS_SWAP_SIZE:-} != "" ]]; then
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if [[ -n ${ZFS_SWAP_SIZE:-} ]]; then
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v_swap_size=$ZFS_SWAP_SIZE
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else
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local swap_size_invalid_message=
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@ -689,7 +742,7 @@ function ask_swap_size {
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}
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function ask_free_tail_space {
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if [[ ${ZFS_FREE_TAIL_SPACE:-} != "" ]]; then
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if [[ -n ${ZFS_FREE_TAIL_SPACE:-} ]]; then
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v_free_tail_space=$ZFS_FREE_TAIL_SPACE
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else
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local tail_space_invalid_message=
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@ -713,7 +766,7 @@ For detailed informations, see the wiki page: https://github.com/saveriomiroddi/
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}
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function ask_rpool_name {
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if [[ ${ZFS_RPOOL_NAME:-} != "" ]]; then
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if [[ -n ${ZFS_RPOOL_NAME:-} ]]; then
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v_rpool_name=$ZFS_RPOOL_NAME
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else
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local rpool_name_invalid_message=
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@ -748,6 +801,29 @@ The encryption/mount-related options are automatically added, and must not be sp
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print_variables v_bpool_create_options v_rpool_create_options
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}
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function ask_dataset_create_options {
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if [[ -n ${ZFS_DATASET_CREATE_OPTIONS:-} ]]; then
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v_dataset_create_options=$ZFS_DATASET_CREATE_OPTIONS
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else
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while true; do
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local tempfile
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tempfile=$(mktemp)
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echo "$c_dataset_options_help$c_default_dataset_create_options" > "$tempfile"
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local user_value
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user_value=$(dialog --editbox "$tempfile" 30 120 3>&1 1>&2 2>&3)
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if [[ -n $user_value && $user_value != *\"* ]]; then
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v_dataset_create_options=$(echo "$user_value" | perl -ne 'print unless /^\s*#/')
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break
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fi
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done
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fi
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print_variables v_dataset_create_options
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}
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function install_host_packages {
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if [[ $v_use_ppa == "1" ]]; then
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if [[ ${ZFS_SKIP_LIVE_ZFS_MODULE_INSTALL:-} != "1" ]]; then
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@ -907,7 +983,7 @@ Proceed with the configuration as usual, then, at the partitioning stage:
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- at the end, choose `Continue Testing`
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'
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if [[ ${ZFS_NO_INFO_MESSAGES:-} == "" ]]; then
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if [[ -z ${ZFS_NO_INFO_MESSAGES:-} ]]; then
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whiptail --msgbox "$dialog_message" 30 100
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fi
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@ -927,11 +1003,11 @@ Proceed with the configuration as usual, then, at the partitioning stage:
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#
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# Note that we assume that the user created only one partition on the temp volume, as expected.
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#
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if ! mountpoint -q "$c_installed_os_data_mount_dir"; then
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mount "$v_temp_volume_device" "$c_installed_os_data_mount_dir"
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if ! mountpoint -q "$c_installed_os_mount_dir"; then
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mount "$v_temp_volume_device" "$c_installed_os_mount_dir"
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fi
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rm -f "$c_installed_os_data_mount_dir/swapfile"
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rm -f "$c_installed_os_mount_dir/swapfile"
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}
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function install_operating_system_Debian {
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@ -952,7 +1028,7 @@ Proceed with the configuration as usual, then, at the partitioning stage:
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- at the end, uncheck `Restart now`, and click `Done`
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'
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if [[ ${ZFS_NO_INFO_MESSAGES:-} == "" ]]; then
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if [[ -z ${ZFS_NO_INFO_MESSAGES:-} ]]; then
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whiptail --msgbox "$dialog_message" 30 100
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fi
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@ -962,24 +1038,24 @@ Proceed with the configuration as usual, then, at the partitioning stage:
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DISPLAY=:0 calamares
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mkdir -p "$c_installed_os_data_mount_dir"
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mkdir -p "$c_installed_os_mount_dir"
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# Note how in Debian, for reasons currenly unclear, the mount fails if the partition is passed;
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# it requires the device to be passed.
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#
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mount "${v_temp_volume_device}" "$c_installed_os_data_mount_dir"
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mount "${v_temp_volume_device}" "$c_installed_os_mount_dir"
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# We don't use chroot()_execute here, as it works on $c_zfs_mount_dir (which is synced on a
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# later stage).
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#
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set +x
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chroot "$c_installed_os_data_mount_dir" bash -c "echo root:$(printf "%q" "$v_root_password") | chpasswd"
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chroot "$c_installed_os_mount_dir" bash -c "echo root:$(printf "%q" "$v_root_password") | chpasswd"
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set -x
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# The installer doesn't set the network interfaces, so, for convenience, we do it.
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#
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for interface in $(ip addr show | perl -lne '/^\d+: (?!lo:)(\w+)/ && print $1' ); do
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cat > "$c_installed_os_data_mount_dir/etc/network/interfaces.d/$interface" <<CONF
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cat > "$c_installed_os_mount_dir/etc/network/interfaces.d/$interface" <<CONF
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auto $interface
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iface $interface inet dhcp
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CONF
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@ -1020,18 +1096,18 @@ You can switch anytime to this terminal, and back, in order to read the instruct
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# See note in install_operating_system(). It's not clear whether this is required on Ubuntu
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# Server, but it's better not to take risks.
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#
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if ! mountpoint -q "$c_installed_os_data_mount_dir"; then
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mount "${v_temp_volume_device}p2" "$c_installed_os_data_mount_dir"
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if ! mountpoint -q "$c_installed_os_mount_dir"; then
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mount "${v_temp_volume_device}p2" "$c_installed_os_mount_dir"
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fi
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rm -f "$c_installed_os_data_mount_dir"/swap.img
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rm -f "$c_installed_os_mount_dir"/swap.img
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}
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function custom_install_operating_system {
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sudo "$ZFS_OS_INSTALLATION_SCRIPT"
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}
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function create_pools {
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function create_pools_and_datasets {
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# POOL OPTIONS #######################
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local encryption_options=()
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@ -1049,9 +1125,10 @@ function create_pools {
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bpool_disks_partitions+=("${selected_disk}-part2")
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done
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# POOLS CREATION #####################
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# ROOT POOL CREATION #################
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# The root pool must be created first, since the boot pool mountpoint is inside it.
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# In this script, the boot pool doesn't have a root dataset; since its creation will mount /boot,
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# it needs to be done after the root pool root dataset is created.
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set +x
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echo -n "$v_passphrase" > "$c_passphrase_named_pipe" &
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@ -1066,10 +1143,42 @@ function create_pools {
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zpool create \
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"${encryption_options[@]}" \
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"${v_rpool_create_options[@]}" \
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-O mountpoint=/ -R "$c_zfs_mount_dir" -f \
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-O mountpoint=/ -O canmount=off -R "$c_zfs_mount_dir" -f \
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"$v_rpool_name" "${v_pools_raid_type[@]}" "${rpool_disks_partitions[@]}" \
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< "$c_passphrase_named_pipe"
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# DATASETS CREATION ##################
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local interpolated_dataset_create_options
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interpolated_dataset_create_options=$(eval echo \""$v_dataset_create_options"\")
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echo "Interpolated dataset create options:"
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echo "$interpolated_dataset_create_options"
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echo
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while read -r dataset_metadata_line || [[ -n $dataset_metadata_line ]]; do
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if [[ $dataset_metadata_line =~ [^[:space:]] ]]; then
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local dataset_metadata_entries
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# shellcheck disable=2206 # cheating for simplicity (alternative: sed and mapfile).
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dataset_metadata_entries=($dataset_metadata_line)
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local dataset=$v_rpool_name/${dataset_metadata_entries[0]}
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local options=("${dataset_metadata_entries[@]:1}")
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# Prepend the `-o`.
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#
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# shellcheck disable=2068 # cheating for simplicity (otherwise each `-o $option` will be a single
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# string).
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zfs create ${options[@]/#/-o } "$dataset"
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fi
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done < <(echo "$interpolated_dataset_create_options")
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chmod 700 /mnt/root
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# This is fine independently of the user creating a dataset for /tmp or not.
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chmod 1777 /mnt/tmp
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# BOOT POOL CREATION #################
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zpool create \
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-o cachefile=/etc/zfs/zpool.cache \
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"${v_bpool_create_options[@]}" \
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@ -1097,7 +1206,7 @@ function sync_os_temp_installation_dir_to_rpool {
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# On Ubuntu Server, `/boot/efi` and `/cdrom` (!!!) are mounted, but they're not needed.
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#
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local mount_dir_submounts
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mount_dir_submounts=$(mount | MOUNT_DIR="${c_installed_os_data_mount_dir%/}" perl -lane 'print $F[2] if $F[2] =~ /$ENV{MOUNT_DIR}\//')
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mount_dir_submounts=$(mount | MOUNT_DIR="${c_installed_os_mount_dir%/}" perl -lane 'print $F[2] if $F[2] =~ /$ENV{MOUNT_DIR}\//')
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for mount_dir in $mount_dir_submounts; do
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umount "$mount_dir"
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@ -1110,7 +1219,7 @@ function sync_os_temp_installation_dir_to_rpool {
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# `/run` is not needed (with an exception), and in Ubuntu Server it's actually a nuisance, since
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# some files vanish while syncing. Debian is well-behaved, and `/run` is empty.
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#
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rsync -avX --exclude=/run --info=progress2 --no-inc-recursive --human-readable "$c_installed_os_data_mount_dir/" "$c_zfs_mount_dir" |
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rsync -avX --exclude=/run --info=progress2 --no-inc-recursive --human-readable "$c_installed_os_mount_dir/" "$c_zfs_mount_dir" |
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perl -lane 'BEGIN { $/ = "\r"; $|++ } $F[1] =~ /(\d+)%$/ && print $1' |
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whiptail --gauge "Syncing the installed O/S to the root pool FS..." 30 100 0
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@ -1118,11 +1227,11 @@ function sync_os_temp_installation_dir_to_rpool {
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# Required destination of symlink `/etc/resolv.conf`, present in Ubuntu systems (not Debian).
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#
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||||
if [[ -d $c_installed_os_data_mount_dir/run/systemd/resolve ]]; then
|
||||
rsync -av --relative "$c_installed_os_data_mount_dir/run/./systemd/resolve" "$c_zfs_mount_dir/run"
|
||||
if [[ -d $c_installed_os_mount_dir/run/systemd/resolve ]]; then
|
||||
rsync -av --relative "$c_installed_os_mount_dir/run/./systemd/resolve" "$c_zfs_mount_dir/run"
|
||||
fi
|
||||
|
||||
umount "$c_installed_os_data_mount_dir"
|
||||
umount "$c_installed_os_mount_dir"
|
||||
}
|
||||
|
||||
function remove_temp_partition_and_expand_rpool {
|
||||
@ -1314,7 +1423,7 @@ function fix_filesystem_mount_ordering {
|
||||
# For the rpool only, it takes around half second on a test VM.
|
||||
#
|
||||
chroot_execute "zfs set canmount=on $c_bpool_name"
|
||||
chroot_execute "zfs set canmount=on $v_rpool_name"
|
||||
chroot_execute "zfs set canmount=on $v_rpool_name/ROOT"
|
||||
|
||||
SECONDS=0
|
||||
|
||||
@ -1382,7 +1491,7 @@ function display_exit_banner {
|
||||
|
||||
You now need to perform a hard reset, then enjoy your ZFS system :-)"
|
||||
|
||||
if [[ ${ZFS_NO_INFO_MESSAGES:-} == "" ]]; then
|
||||
if [[ -z ${ZFS_NO_INFO_MESSAGES:-} ]]; then
|
||||
whiptail --msgbox "$dialog_message" 30 100
|
||||
fi
|
||||
}
|
||||
@ -1405,6 +1514,7 @@ invoke "find_suitable_disks"
|
||||
invoke "set_zfs_ppa_requirement"
|
||||
invoke "register_exit_hook"
|
||||
invoke "create_passphrase_named_pipe"
|
||||
invoke "install_dialog_package"
|
||||
|
||||
invoke "select_disks"
|
||||
invoke "select_pools_raid_type"
|
||||
@ -1415,21 +1525,22 @@ invoke "ask_swap_size"
|
||||
invoke "ask_free_tail_space"
|
||||
invoke "ask_rpool_name"
|
||||
invoke "ask_pool_create_options"
|
||||
invoke "ask_dataset_create_options"
|
||||
|
||||
invoke "install_host_packages"
|
||||
invoke "setup_partitions"
|
||||
|
||||
if [[ "${ZFS_OS_INSTALLATION_SCRIPT:-}" == "" ]]; then
|
||||
if [[ -z ${ZFS_OS_INSTALLATION_SCRIPT:-} ]]; then
|
||||
# Includes the O/S extra configuration, if necessary (network, root pwd, etc.)
|
||||
invoke "install_operating_system"
|
||||
|
||||
invoke "create_pools"
|
||||
invoke "create_pools_and_datasets"
|
||||
invoke "create_swap_volume"
|
||||
invoke "copy_zpool_cache"
|
||||
invoke "sync_os_temp_installation_dir_to_rpool"
|
||||
invoke "remove_temp_partition_and_expand_rpool"
|
||||
else
|
||||
invoke "create_pools"
|
||||
invoke "create_pools_and_datasets"
|
||||
invoke "create_swap_volume"
|
||||
invoke "copy_zpool_cache"
|
||||
invoke "remove_temp_partition_and_expand_rpool"
|
||||
|
||||
Loading…
Reference in New Issue
Block a user