mirror of
git://sourceware.org/git/lvm2.git
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337 lines
9.4 KiB
Bash
Executable File
337 lines
9.4 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (C) 2009 Chris Procter All rights reserved.
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# Copyright (C) 2009-2017 Red Hat, Inc. All rights reserved.
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#
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# This file is part of LVM2.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#
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# vgimportclone: This script is used to rename the VG and change the associated
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# VG and PV UUIDs (primary application being HW snapshot restore)
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# following external commands are used throughout the script
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# echo and test are internal in bash at least
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RM="rm"
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BASENAME="basename"
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MKTEMP="mktemp"
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READLINK="readlink"
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GETOPT="getopt"
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# user may override lvm location by setting LVM_BINARY
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LVM=${LVM_BINARY:-lvm}
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die() {
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code=$1; shift
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echo "Fatal:" "$@" 1>&2
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exit "$code"
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}
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"$LVM" version >& /dev/null || die 2 "Could not run lvm binary '$LVM'"
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function getvgname {
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### get a unique vg name
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### $1 = list of exists VGs
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### $2 = the name we want
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VGLIST=$1
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VG=$2
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NEWVG=$3
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BNAME="${NEWVG:-${VG}}"
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NAME=${BNAME}
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I=0
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while [[ "${VGLIST}" =~ :${NAME}: ]]
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do
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I=$(( I + 1 ))
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NAME="${BNAME}$I"
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done
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echo "${NAME}"
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}
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function checkvalue {
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### check return value and error if non zero
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if [ "$1" -ne 0 ]; then
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die "$1" "$2, error: $1"
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fi
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}
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function usage {
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### display usage message
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echo "Usage: ${SCRIPTNAME} [options] PhysicalVolume [PhysicalVolume...]"
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echo " -n|--basevgname - Base name for the new volume group(s)"
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echo " -i|--import - Import any exported volume groups found"
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echo " -t|--test - Run in test mode"
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echo " --quiet - Suppress output"
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echo " -v|--verbose - Set verbose level"
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echo " -d|--debug - Set debug level"
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echo " --version - Display version information"
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echo " -h|--help - Display this help message"
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echo ""
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exit 1
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}
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function cleanup {
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#set to use old lvm.conf
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LVM_SYSTEM_DIR=$ORIG_LVM_SYS_DIR
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if [ "$KEEP_TMP_LVM_SYSTEM_DIR" -eq 1 ]; then
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echo "${SCRIPTNAME}: LVM_SYSTEM_DIR (${TMP_LVM_SYSTEM_DIR}) must be cleaned up manually."
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else
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"$RM" -rf -- "$TMP_LVM_SYSTEM_DIR"
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fi
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}
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SCRIPTNAME=$("$BASENAME" "$0")
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if [ "$UID" != 0 ] && [ "$EUID" != 0 ]; then
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die 3 "${SCRIPTNAME} must be run as root."
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fi
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LVM_OPTS=""
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TEST_OPT=""
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DISKS=""
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# for compatibility: using mktemp -t rather than --tmpdir
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TMP_LVM_SYSTEM_DIR=$("$MKTEMP" -d -t snap.XXXXXXXX)
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KEEP_TMP_LVM_SYSTEM_DIR=0
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CHANGES_MADE=0
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IMPORT=0
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DEBUG=""
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VERBOSE=""
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VERBOSE_COUNT=0
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DEVNO=0
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if [ -n "${LVM_SYSTEM_DIR}" ]; then
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export ORIG_LVM_SYS_DIR="${LVM_SYSTEM_DIR}"
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fi
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trap cleanup 0 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 17 18
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#####################################################################
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### Get and check arguments
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#####################################################################
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OPTIONS=$("$GETOPT" -o n:dhitv \
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-l basevgname:,debug,help,import,quiet,test,verbose,version \
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-n "${SCRIPTNAME}" -- "$@")
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[ $? -ne 0 ] && usage
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eval set -- "$OPTIONS"
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while true
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do
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case $1 in
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-n|--basevgname)
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NEWVG=$2; shift; shift
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;;
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-i|--import)
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IMPORT=1; shift
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;;
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-t|--test)
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TEST_OPT="-t"
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shift
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;;
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--quiet)
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LVM_OPTS="--quiet ${LVM_OPTS}"
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shift
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;;
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-v|--verbose)
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VERBOSE_COUNT=$(( VERBOSE_COUNT + 1 ))
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if [ -z "$VERBOSE" ]
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then
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VERBOSE="-v"
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else
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VERBOSE="${VERBOSE}v"
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fi
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shift
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;;
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-d|--debug)
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if [ -z "$DEBUG" ]
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then
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DEBUG="-d"
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set -x
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else
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DEBUG="${DEBUG}d"
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fi
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shift
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;;
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--version)
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"$LVM" version
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shift
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exit 0
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;;
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-h|--help)
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usage; shift
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;;
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--)
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shift; break
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;;
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*)
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usage
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;;
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esac
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done
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# turn on DEBUG (special case associated with -v use)
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if [ -z "$DEBUG" ] && [ "$VERBOSE_COUNT" -gt 3 ]; then
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DEBUG="-d"
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set -x
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fi
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# setup LVM_OPTS
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if [ -n "$DEBUG" ] || [ -n "$VERBOSE" ]; then
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LVM_OPTS="${LVM_OPTS} ${DEBUG} ${VERBOSE}"
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fi
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# process remaining arguments (which should be disks)
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for ARG
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do
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if [ -b "$ARG" ]
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then
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ln -s "$ARG" "${TMP_LVM_SYSTEM_DIR}/vgimport${DEVNO}"
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DISKS="${DISKS} ${TMP_LVM_SYSTEM_DIR}/vgimport${DEVNO}"
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DEVNO=$(( DEVNO + 1 ))
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else
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die 3 "$ARG is not a block device."
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fi
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done
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### check we have suitable values for important variables
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if [ -z "${DISKS}" ]
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then
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usage
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fi
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#####################################################################
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### Get the existing state so we can use it later.
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### The list of VG names is saved in this format:
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### :vgname1:vgname2:...:vgnameN:
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#####################################################################
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OLDVGS=":$("$LVM" vgs ${LVM_OPTS} -o name --noheadings --rows --separator : --config 'log{prefix=""}'):"
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checkvalue $? "Current VG names could not be collected without errors"
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#####################################################################
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### Prepare the temporary lvm environment
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#####################################################################
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for BLOCK in ${DISKS}
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do
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FILTER="\"a|^${BLOCK}$|\", ${FILTER}"
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done
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export FILTER="filter=[ ${FILTER} \"r|.*|\" ]"
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LVMCONF="${TMP_LVM_SYSTEM_DIR}/lvm.conf"
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CMD_CONFIG_LINE="devices { \
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scan = [ \"${TMP_LVM_SYSTEM_DIR}\" ] \
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cache_dir = \"${TMP_LVM_SYSTEM_DIR}/cache\"
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global_filter = [ \"a|.*|\" ] \
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${FILTER}
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} \
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global { \
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use_lvmetad = 0 \
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}"
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$LVM dumpconfig ${LVM_OPTS} --file "${LVMCONF}" --mergedconfig --config "${CMD_CONFIG_LINE}"
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checkvalue $? "Failed to generate ${LVMCONF}"
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# Only keep TMP_LVM_SYSTEM_DIR if it contains something worth keeping
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[ -n "${DEBUG}" ] && KEEP_TMP_LVM_SYSTEM_DIR=1
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### set to use new lvm.conf
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export LVM_SYSTEM_DIR=${TMP_LVM_SYSTEM_DIR}
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# Check if there are any PVs that don't belong to any VG
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# or even if there are disks which are not PVs at all.
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NOVGDEVLIST=$("$LVM" pvs -a -o pv_name --select vg_name="" --noheadings)
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checkvalue $? "Failed to collect information for PV check"
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if [ -n "${NOVGDEVLIST}" ]; then
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FOLLOWLIST=""
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while read -r PVNAME; do
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FOLLOW=$("$READLINK" "$PVNAME")
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FOLLOWLIST="$FOLLOWLIST $FOLLOW"
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done <<< "$(echo "$NOVGDEVLIST")"
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die 8 "Specified devices don't belong to a VG:$FOLLOWLIST"
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fi
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#####################################################################
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### Rename the VG(s) and change the VG and PV UUIDs.
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#####################################################################
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VGLIST=$("$LVM" vgs -o vg_name,vg_exported,vg_missing_pv_count --noheadings --binary)
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checkvalue $? "Failed to collect VG information"
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while read -r VGNAME VGEXPORTED VGMISSINGPVCOUNT; do
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if [ "$VGMISSINGPVCOUNT" -gt 0 ]; then
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echo "Volume Group ${VGNAME} has unknown PV(s), skipping."
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echo "- Were all associated PV(s) supplied as arguments?"
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continue
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fi
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if [ "$VGEXPORTED" = "1" ]; then
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if [ "${IMPORT}" -eq 1 ]; then
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"$LVM" vgimport ${LVM_OPTS} ${TEST_OPT} "${VGNAME}"
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checkvalue $? "Volume Group ${VGNAME} could not be imported"
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else
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echo "Volume Group ${VGNAME} exported, skipping."
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continue
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fi
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fi
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"$LVM" pvchange ${LVM_OPTS} ${TEST_OPT} --uuid --config 'global{activation=0}' --select "vg_name=${VGNAME}"
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checkvalue $? "Unable to change all PV uuids in VG ${VGNAME}"
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NEWVGNAME=$(getvgname "$OLDVGS" "$VGNAME" "$NEWVG")
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"$LVM" vgchange ${LVM_OPTS} ${TEST_OPT} --uuid --config 'global{activation=0}' "$VGNAME"
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checkvalue $? "Unable to change VG uuid for ${VGNAME}"
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## if the name isn't going to get changed dont even try.
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if [ "${VGNAME}" != "${NEWVGNAME}" ]
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then
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"$LVM" vgrename ${LVM_OPTS} ${TEST_OPT} "${VGNAME}" "${NEWVGNAME}"
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checkvalue $? "Unable to rename ${VGNAME} to ${NEWVGNAME}"
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fi
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CHANGES_MADE=1
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done <<< "$(echo "$VGLIST")"
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#####################################################################
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### Restore the old environment
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#####################################################################
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### set to use old lvm.conf
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if [ -z "$ORIG_LVM_SYS_DIR" ]
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then
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unset LVM_SYSTEM_DIR
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else
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LVM_SYSTEM_DIR=$ORIG_LVM_SYS_DIR
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fi
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### update the device cache and make sure all
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### the device nodes we need are straight
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if [ "${CHANGES_MADE}" -eq 1 ]
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then
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# get global/use_lvmetad config and if set also notify lvmetad about changes
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# since we were running LVM commands above with use_lvmetad=0
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eval "$("$LVM" dumpconfig ${LVM_OPTS} global/use_lvmetad)"
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if [ "$use_lvmetad" = 1 ]
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then
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echo "Notifying lvmetad about changes since it was disabled temporarily."
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echo "(This resolves any WARNING message about restarting lvmetad that appears above.)"
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LVM_OPTS="${LVM_OPTS} --cache"
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fi
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"$LVM" vgscan ${LVM_OPTS} --mknodes
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fi
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exit 0
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