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remove old lxc-create script.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
This commit is contained in:
Serge Hallyn
parent
dc23c1c817
commit
6a2e602b1b
@ -1,415 +0,0 @@
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#!/bin/sh
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#
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# lxc: linux Container library
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# Authors:
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# Daniel Lezcano <daniel.lezcano@free.fr>
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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. @DATADIR@/lxc/lxc.functions
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verify_btrfs() {
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if which btrfs >/dev/null 2>&1 && \
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btrfs filesystem df "$lxc_path/" >/dev/null 2>&1; then
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echo "btrfs"
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else
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echo "no"
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fi
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}
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verify_zfs() {
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if which zfs >/dev/null 2>&1 && zfs get all "$zfsroot" >/dev/null 2>&1; then
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echo zfs
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else
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echo no
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fi
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}
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verify_lvm() {
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which vgscan > /dev/null 2>&1
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if [ $? -ne 0 ]; then
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echo "vgscan not found (is lvm2 installed?)" >&2
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echo no
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return
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fi
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grep -q "\<$fstype\>" /proc/filesystems
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if [ $? -ne 0 ]; then
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echo "$fstype is not listed in /proc/filesystems" >&2
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echo no
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return
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fi
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vgscan | grep -q "Found volume group \"$vgname\""
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if [ $? -ne 0 ]; then
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echo "could not find volume group \"$vgname\"" >&2
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echo no
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return
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fi
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echo lvm
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}
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# if no backingstore is specified, auto-detect if $lxc_path is btrfs or zfs
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detect_backingstore() {
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if [ `verify_btrfs` = "btrfs" ]; then
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echo btrfs
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elif [ `verify_zfs` = "zfs" ]; then
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echo zfs
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else
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echo none
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fi
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}
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usage() {
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echo "usage: $(basename $0) -n NAME [-f CONFIG_FILE] [-t TEMPLATE] [FS_OPTIONS] --" >&2
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echo " [-P lxcpath] [TEMPLATE_OPTIONS]" >&2
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echo >&2
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echo "where FS_OPTIONS is one of:" >&2
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echo " -B none" >&2
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echo " -B dir [--dir rootfs_dir]" >&2
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echo " -B lvm [--lvname LV_NAME] [--vgname VG_NAME] [--fstype FS_TYPE]" >&2
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echo " [--fssize FS_SIZE]" >&2
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echo " -B btrfs" >&2
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echo " -B zfs [--zfsroot PATH]" >&2
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}
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help() {
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usage
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echo >&2
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echo "Create a new container on the system." >&2
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echo >&2
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echo "Options:" >&2
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echo " -n NAME specify the name of the container" >&2
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echo " -f CONFIG_FILE use an existing configuration file" >&2
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echo " -t TEMPLATE use an accessible template script" >&2
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echo " -B BACKING_STORE alter the container backing store (default: none)" >&2
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echo " --lxcpath path specify an alternate container patch (default: $lxc_path)" >&2
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echo " --lvname LV_NAME specify the LVM logical volume name" >&2
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echo " (default: container name)" >&2
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echo " --dir ROOTFS_DIR specify path for custom rootfs directory location" >&2
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echo " --vgname VG_NAME specify the LVM volume group name (default: lxc)" >&2
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echo " --fstype FS_TYPE specify the filesystem type (default: ext4)" >&2
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echo " --fssize FS_SIZE specify the filesystem size (default: 500M)" >&2
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echo " --zfsroot PATH specify the zfs path for lxcpath (default: tank/lxc)" >&2
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echo >&2
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if [ -z "$lxc_template" ]; then
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echo "To see template-specific options, specify a template. For example:" >&2
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echo " $(basename $0) -t ubuntu -h" >&2
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exit 0
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fi
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if [ -x ${templatedir}/lxc-$lxc_template ]; then
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echo >&2
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echo "Template-specific options (TEMPLATE_OPTIONS):" >&2
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${templatedir}/lxc-$lxc_template -h
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fi
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}
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usage_err() {
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[ -n "$1" ] && echo "$1" >&2
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usage
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exit 1
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}
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optarg_check() {
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if [ -z "$2" ]; then
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usage_err "option '$1' requires an argument"
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fi
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}
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backingstore=_unset
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fstype=ext4
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fssize=500M
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vgname=$lxc_vg
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zfsroot=$lxc_zfsroot
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custom_rootfs=""
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while [ $# -gt 0 ]; do
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opt="$1"
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shift
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case "$opt" in
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-h|--help)
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help
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exit 1
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;;
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-n|--name)
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optarg_check $opt "$1"
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lxc_name=$1
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shift
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;;
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-f|--config)
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optarg_check $opt "$1"
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lxc_config=$1
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shift
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;;
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-P|--lxcpath)
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optarg_check $opt "$1"
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lxc_path=$1
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shift
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;;
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-t|--template)
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optarg_check $opt "$1"
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lxc_template=$1
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shift
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;;
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-B|--backingstore)
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optarg_check $opt "$1"
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backingstore=$1
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shift
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;;
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--dir)
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optarg_check $opt "$1"
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custom_rootfs=$1
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shift
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;;
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--lvname)
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optarg_check $opt "$1"
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lvname=$1
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shift
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;;
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--vgname)
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optarg_check $opt "$1"
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vgname=$1
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shift
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;;
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--fstype)
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optarg_check $opt "$1"
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fstype=$1
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shift
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;;
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--fssize)
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optarg_check $opt "$1"
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fssize=$1
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shift
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;;
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--zfsroot)
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optarg_check $opt "$1"
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zfsroot=$1
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shift
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;;
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--)
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break;;
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-?)
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usage_err "unknown option '$opt'"
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;;
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-*)
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# split opts -abc into -a -b -c
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set -- $(echo "${opt#-}" | sed 's/\(.\)/ -\1/g') "$@"
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;;
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*)
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usage
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exit 1
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;;
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esac
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done
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# If -h or --help was passed into the container, we'll want to cleanup
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# afterward
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wantedhelp=0
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for var in "$@"; do
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if [ "$var" = "-h" ] || [ "$var" = "--help" ]; then
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help
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exit 1
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fi
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done
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if [ -z "$lxc_path" ]; then
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echo "$(basename $0): no configuration path defined" >&2
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exit 1
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fi
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if [ ! -r $lxc_path ]; then
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echo "$(basename $0): configuration path '$lxc_path' not found" >&2
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exit 1
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fi
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if [ -z "$lxc_name" ]; then
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echo "$(basename $0): no container name specified" >&2
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usage
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exit 1
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fi
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if [ -z "$lvname" ]; then
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lvname="$lxc_name"
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fi
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if [ -z "$zfsroot" ]; then
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zfsroot="tank/lxc"
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fi
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if [ "$(id -u)" != "0" ]; then
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echo "$(basename $0): must be run as root" >&2
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exit 1
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fi
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if [ -n "$custom_rootfs" ] && [ "$backingstore" != "dir" ]; then
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echo "--dir is only valid with -B dir"
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fi
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# detect / verify backing store
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case "$backingstore" in
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btrfs)
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if [ `verify_btrfs` != 'btrfs' ]; then
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echo "missing 'btrfs' command or $lxc_path is not btrfs" >&2
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exit 1
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fi
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;;
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zfs)
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if [ `verify_zfs` != 'zfs' ]; then
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echo "missing 'zfs' command or $zfsroot is not zfs" >&2
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exit 1
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fi
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;;
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lvm)
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if [ `verify_lvm` != 'lvm' ]; then
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echo "system is missing 'lvm' support, or VG does not exist." >&2
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exit 1
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fi
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rootdev=/dev/$vgname/$lvname
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lvdisplay $rootdev > /dev/null 2>&1
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if [ $? -eq 0 ]; then
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echo "LV $rootdev already exists" >&2
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exit 1
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fi
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;;
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_unset)
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backingstore=`detect_backingstore`
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;;
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dir|lvm|none)
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:;;
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*)
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echo "$(basename $0): '$backingstore' is not known (try 'none', 'dir', 'lvm', 'btrfs', 'zfs')" >&2
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usage
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exit 1
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;;
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esac
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if [ -d "$lxc_path/$lxc_name" ]; then
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echo "$(basename $0): '$lxc_name' already exists" >&2
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exit 1
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fi
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rootfs="$lxc_path/$lxc_name/rootfs"
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cleanup() {
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if [ "$backingstore" = "lvm" ]; then
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umount -l $rootfs || true
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lvremove -f $rootdev || true
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elif [ "$backingstore" = "btrfs" ]; then
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btrfs subvolume delete "$rootfs" || true
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elif [ "$backingstore" = "zfs" ]; then
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zfs destroy "$zfsroot/$lxc_name" || true
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fi
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${bindir}/lxc-destroy -n $lxc_name -P "$lxc_path"
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echo "$(basename $0): aborted" >&2
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exit 1
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}
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trap cleanup HUP INT TERM
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# set up container dir per backing store
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if [ "$backingstore" = "zfs" ]; then
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zfs create -omountpoint=$lxc_path/$lxc_name/rootfs "$zfsroot/$lxc_name"
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elif [ "$backingstore" = "btrfs" ]; then
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mkdir "$lxc_path/$lxc_name"
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if ! out=$(btrfs subvolume create "$rootfs" 2>&1); then
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echo "$(basename $0): failed to create subvolume in $rootfs: $out" >&2
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exit 1;
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fi
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else
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mkdir -p $lxc_path/$lxc_name
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fi
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if [ -z "$lxc_config" ]; then
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lxc_config="@SYSCONFDIR@/lxc/default.conf"
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echo
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echo "$(basename $0): No config file specified, using the default config $lxc_config"
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fi
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if [ ! -r "$lxc_config" ]; then
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echo "$(basename $0): '$lxc_config' configuration file not found" >&2
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cleanup
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fi
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if [ ! -z "$lxc_template" ]; then
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# Allow for a path to be provided as the template name
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if [ -x "$lxc_template" -a $(echo "$lxc_template" | cut -c 1) = '/' ]; then
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template_path=$lxc_template
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else
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template_path=${templatedir}/lxc-$lxc_template
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fi
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if ! [ -x "$template_path" ]; then
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echo "$(basename $0): unknown template '$lxc_template'" >&2
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cleanup
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fi
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sum=$(sha1sum $template_path | cut -d ' ' -f1)
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echo "# Template used to create this container: $lxc_template" >> $lxc_path/$lxc_name/config
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if [ -n "$*" ]; then
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echo "# Parameters passed to the template: $*" >> $lxc_path/$lxc_name/config
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fi
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echo "# Template script checksum (SHA-1): $sum" >> $lxc_path/$lxc_name/config
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echo "" >> $lxc_path/$lxc_name/config
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fi
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cat $lxc_config >> $lxc_path/$lxc_name/config
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echo "" >> $lxc_path/$lxc_name/config
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if [ -n "$custom_rootfs" ]; then
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if grep -q "lxc.rootfs" $lxc_path/$lxc_name/config ; then
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echo "configuration file already specifies a lxc.rootfs"
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cleanup
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fi
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if [ -d "$custom_rootfs" ]; then
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echo "specified rootfs ($custom_rootfs) already exists. Bailing."
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cleanup
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fi
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echo "lxc.rootfs = $custom_rootfs" >> $lxc_path/$lxc_name/config
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fi
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# Create the fs as needed
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if [ "$backingstore" = "lvm" ]; then
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[ -d "$rootfs" ] || mkdir $rootfs
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lvcreate -L $fssize -n $lvname $vgname || cleanup
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udevadm settle
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mkfs -t $fstype $rootdev || cleanup
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mount -t $fstype $rootdev $rootfs
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fi
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if [ ! -z "$lxc_template" ]; then
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$template_path --path=$lxc_path/$lxc_name --name=$lxc_name "$@"
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if [ $? -ne 0 ]; then
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echo "$(basename $0): failed to execute template '$lxc_template'" >&2
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cleanup
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fi
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echo "'$lxc_template' template installed"
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fi
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if [ "$backingstore" = "lvm" ]; then
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echo "Unmounting LVM"
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umount $rootfs
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# TODO: make the templates set this right from the start?
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sed -i '/lxc.rootfs/d' $lxc_path/$lxc_name/config
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echo "lxc.rootfs = $rootdev" >> $lxc_path/$lxc_name/config
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fi
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echo "'$lxc_name' created"
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