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867e4cfffb
Some major distributions are still using 'mawk' and they are not using the latest version - we end here with hidden dependency on the latest version of mawk (1.3.4) while i.e. Debian Lenny seems to stay with 1.3.3. So we end with completely broken vgimportclone script on such system. We would need to check for proper support of :space: and abort build if it doesn't work or simplier replace [:space:] with [ \t] which seems sufficient to make it work (as can be seen in this patch) A better fix would be to use command line parameter override - leaving as FIXME comment. This patch makes t-vgimportclone.sh test passing on Lenny.
368 lines
10 KiB
Bash
Executable File
368 lines
10 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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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AWK=awk
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CUT=cut
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TR=tr
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READLINK=readlink
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GREP=grep
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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 ]
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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" -a "$EUID" != "0" ]
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then
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die 3 "${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="${LVM_SYSTEM_DIR}"
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fi
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trap cleanup 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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#####################################################################
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### Get and check arguments
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#####################################################################
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OPTIONS=`"$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 ${LVM_OPTS}"
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shift
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;;
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-v|--verbose)
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let VERBOSE_COUNT=VERBOSE_COUNT+1
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if [ -z "$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" -a $VERBOSE_COUNT -gt 3 ]; then
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DEBUG="-d"
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set -x
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fi
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# setup LVM_OPTS
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if [ -n "${DEBUG}" -o -n "${VERBOSE}" ]
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then
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LVM_OPTS="${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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PVS_OUT=`"${LVM}" pvs ${LVM_OPTS} --noheadings -o vg_name "$ARG" 2>/dev/null`
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checkvalue $? "$ARG is not a PV."
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PV_VGNAME=$(echo $PVS_OUT | $GREP -v '[[:space:]]+$')
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[ -z "$PV_VGNAME" ] && die 3 "$ARG is not in a VG."
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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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#####################################################################
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OLDVGS=`"${LVM}" vgs ${LVM_OPTS} -o name --noheadings 2>/dev/null`
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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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# FIXME convert to cmdline override
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"$LVM" dumpconfig ${LVM_OPTS} | \
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"$AWK" -v DEV=${TMP_LVM_SYSTEM_DIR} -v CACHE=${TMP_LVM_SYSTEM_DIR}/.cache \
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-v CACHE_DIR=${TMP_LVM_SYSTEM_DIR}/cache \
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'/^[ \t]*filter[ \t]*=/{print ENVIRON["FILTER"];next} \
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/^[ \t]*scan[ \t]*=/{print "scan = [ \"" DEV "\" ]";next} \
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/^[ \t]*cache[ \t]*=/{print "cache = \"" CACHE "\"";next} \
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/^[ \t]*cache_dir[ \t]*=/{print "cache_dir = \"" CACHE_DIR "\"";next} \
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{print $0}' > ${LVMCONF}
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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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# verify the config contains the filter, scan and cache_dir (or cache) config keywords
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"$GREP" -q '^[[:space:]]*filter[[:space:]]*=' ${LVMCONF} || \
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die 5 "Temporary lvm.conf must contain 'filter' config."
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"$GREP" -q '^[[:space:]]*scan[[:space:]]*=' ${LVMCONF} || \
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die 6 "Temporary lvm.conf must contain 'scan' config."
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# check for either 'cache' or 'cache_dir' config values
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"$GREP" -q '[[:space:]]*cache[[:space:]]*=' ${LVMCONF}
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CACHE_RET=$?
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"$GREP" -q '^[[:space:]]*cache_dir' ${LVMCONF}
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CACHE_DIR_RET=$?
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[ $CACHE_RET -eq 0 -o $CACHE_DIR_RET -eq 0 ] || \
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die 7 "Temporary lvm.conf must contain 'cache' or 'cache_dir' config."
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### set to use new lvm.conf
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export LVM_SYSTEM_DIR=${TMP_LVM_SYSTEM_DIR}
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#####################################################################
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### Rename the VG(s) and change the VG and PV UUIDs.
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#####################################################################
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PVINFO=`"${LVM}" pvs ${LVM_OPTS} -o pv_name,vg_name,vg_attr --noheadings --separator : 2>/dev/null`
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checkvalue $? "PV info could not be collected without errors"
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# output VG info so each line looks like: name:exported?:disk1,disk2,...
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VGINFO=`echo "${PVINFO}" | \
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"$AWK" -F : '{{sub(/^[ \t]*/,"")} \
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{sub(/unknown device/,"unknown_device")} \
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{vg[$2]=$1","vg[$2]} if($3 ~ /^..x/){x[$2]="x"}} \
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END{for(k in vg){printf("%s:%s:%s\n", k, x[k], vg[k])}}'`
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checkvalue $? "PV info could not be parsed without errors"
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for VG in ${VGINFO}
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do
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VGNAME=`echo "${VG}" | "$CUT" -d: -f1`
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EXPORTED=`echo "${VG}" | "$CUT" -d: -f2`
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PVLIST=`echo "${VG}" | "$CUT" -d: -f3- | "$TR" , ' '`
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if [ -z "${VGNAME}" ]
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then
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FOLLOWLIST=""
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for DEV in $PVLIST; do
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FOLLOW=`"$READLINK" $DEV`
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FOLLOWLIST="$FOLLOW $FOLLOWLIST"
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done
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die 8 "Specified PV(s) ($FOLLOWLIST) don't belong to a VG."
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fi
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if [ -n "${EXPORTED}" ]
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then
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if [ ${IMPORT} -eq 1 ]
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then
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"$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 ${VGNAME} exported, skipping."
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continue
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fi
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fi
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### change the pv uuids
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if [[ "${PVLIST}" =~ "unknown" ]]
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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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for BLOCKDEV in ${PVLIST}
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do
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"$LVM" pvchange ${LVM_OPTS} ${TEST_OPT} --uuid ${BLOCKDEV} --config 'global{activation=0}'
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checkvalue $? "Unable to change PV uuid for ${BLOCKDEV}"
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done
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NEWVGNAME=`getvgname "${OLDVGS}" "${VGNAME}" "${NEWVG}"`
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"$LVM" vgchange ${LVM_OPTS} ${TEST_OPT} --uuid "${VGNAME}" --config 'global{activation=0}'
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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 ${NEWVGNAME}"
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fi
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CHANGES_MADE=1
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done
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#####################################################################
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### Restore the old environment
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#####################################################################
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### set to use old lvm.conf
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if [ -z "${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 [ ${CHANGES_MADE} -eq 1 ]
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then
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"$LVM" vgscan ${LVM_OPTS} --mknodes
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fi
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exit 0
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