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#!/bin/bash
#
# Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
#
# This file is part of the lvm2 package.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Edit an lvm.conf file to adjust various properties
#
# cluster with clvmd and/or locking lib?
HANDLE_CLUSTER=0
# cluster without clvmd?
HANDLE_HALVM=0
# also enable services appropriately (lvmetad, clvmd)?
HANDLE_SERVICES=0
# also enable cmirrord service in addition?
HANDLE_MIRROR_SERVICE=0
# also start/start services in addition to enabling/disabling them?
START_STOP_SERVICES=0
function usage
{
echo "Usage: $0 <command>"
echo ""
echo "Commands:"
echo "Enable clvm: --enable-cluster [--lockinglibdir <dir>] [--lockinglib <lib>]"
echo "Disable clvm: --disable-cluster"
echo "Enable halvm: --enable-halvm"
echo "Disable halvm: --disable-halvm"
echo "Set locking library: --lockinglibdir <dir> [--lockinglib <lib>]"
echo ""
echo "Global options:"
echo "Config file location: --file <configfile>"
echo "Set services: --services [--mirrorservice] [--startstopservices]"
echo ""
echo "Use the separate command 'lvmconfig' to display configuration information"
}
function set_default_use_lvmetad_var
{
eval $(lvm dumpconfig --type default global/use_lvmetad 2>/dev/null)
if [ "$?" != "0" ]; then
USE_LVMETAD=0
else
USE_LVMETAD=$use_lvmetad
fi
}
function parse_args
{
while [ -n "$1" ]; do
case $1 in
--enable-cluster)
LOCKING_TYPE=3
USE_LVMETAD=0
HANDLE_CLUSTER=1
shift
;;
--disable-cluster)
LOCKING_TYPE=1
set_default_use_lvmetad_var
HANDLE_CLUSTER=1
shift
;;
--enable-halvm)
LOCKING_TYPE=1
USE_LVMETAD=0
HANDLE_HALVM=1
shift
;;
--disable-halvm)
LOCKING_TYPE=1
set_default_use_lvmetad_var
HANDLE_HALVM=1
shift
;;
--lockinglibdir)
if [ -n "$2" ]; then
LOCKINGLIBDIR=$2
shift 2
else
usage
exit 1
fi
HANDLE_CLUSTER=1
;;
--lockinglib)
if [ -n "$2" ]; then
LOCKINGLIB=$2
shift 2
else
usage
exit 1
fi
HANDLE_CLUSTER=1
;;
--file)
if [ -n "$2" ]; then
CONFIGFILE=$2
shift 2
else
usage
exit 1
fi
;;
--services)
HANDLE_SERVICES=1
shift
;;
--mirrorservice)
HANDLE_MIRROR_SERVICE=1
shift
;;
--startstopservices)
START_STOP_SERVICES=1
shift
;;
*)
usage
exit 1
esac
done
if [ "$LOCKINGLIBDIR" -o "$LOCKINGLIB" ]; then
LOCKING_TYPE=2
USE_LVMETAD=0
fi
}
function validate_args
{
[ -z "$CONFIGFILE" ] && CONFIGFILE="/etc/lvm/lvm.conf"
if [ ! -f "$CONFIGFILE" ]
then
echo "$CONFIGFILE does not exist"
exit 10
fi
if [ "$HANDLE_CLUSTER" = "1" -a "$HANDLE_HALVM" = "1" ]; then
echo "Either HA LVM or cluster method may be used at one time"
exit 18
fi
if [ "$HANDLE_SERVICES" = "0" ]; then
if [ "$HANDLE_MIRROR_SERVICE" = "1" ]; then
echo "--mirrorservice may be used only with --services"
exit 19
fi
if [ "$START_STOP_SERVICES" = "1" ]; then
echo "--startstopservices may be used only with --services"
exit 19
fi
fi
if [ -z "$LOCKING_TYPE" ] && [ -z "$LOCKINGLIBDIR" ]; then
usage
exit 1
fi
if [ -n "$LOCKINGLIBDIR" ]; then
if [ "${LOCKINGLIBDIR:0:1}" != "/" ]
then
echo "Prefix must be an absolute path name (starting with a /)"
exit 12
fi
if [ -n "$LOCKINGLIB" ] && [ ! -f "$LOCKINGLIBDIR/$LOCKINGLIB" ]
then
echo "$LOCKINGLIBDIR/$LOCKINGLIB does not exist, did you do a \"make install\" ?"
exit 11
fi
fi
if [ "$LOCKING_TYPE" = "1" ] && [ -n "$LOCKINGLIBDIR" -o -n "$LOCKINGLIB" ]; then
echo "Superfluous locking lib parameter, ignoring"
fi
}
umask 0077
parse_args "$@"
validate_args
SCRIPTFILE=/etc/lvm/.lvmconf-script.tmp
TMPFILE=/etc/lvm/.lvmconf-tmp.tmp
# Flags so we know which parts of the file we can replace and which need
# adding. These are return codes from grep, so zero means it IS present!
have_type=1
have_dir=1
have_library=1
have_use_lvmetad=1
have_global=1
grep -q '^[[:blank:]]*locking_type[[:blank:]]*=' $CONFIGFILE
have_type=$?
grep -q '^[[:blank:]]*library_dir[[:blank:]]*=' $CONFIGFILE
have_dir=$?
grep -q '^[[:blank:]]*locking_library[[:blank:]]*=' $CONFIGFILE
have_library=$?
grep -q '^[[:blank:]]*use_lvmetad[[:blank:]]*=' $CONFIGFILE
have_use_lvmetad=$?
# Those options are in section "global {" so we must have one if any are present.
if [ "$have_type" = "0" -o "$have_dir" = "0" -o "$have_library" = "0" -o "$have_use_lvmetad" = "0" ]
then
# See if we can find it...
grep -q '^[[:blank:]]*global[[:blank:]]*{' $CONFIGFILE
have_global=$?
if [ "$have_global" = "1" ]
then
echo "global keys but no 'global {' found, can't edit file"
exit 13
fi
fi
if [ "$LOCKING_TYPE" = "2" ] && [ -z "$LOCKINGLIBDIR" ] && [ "$have_dir" = "1" ]; then
echo "no library_dir specified in $CONFIGFILE"
exit 16
fi
# So if we don't have "global {" we need to create one and
# populate it
if [ "$have_global" = "1" ]
then
if [ -z "$LOCKING_TYPE" ]; then
LOCKING_TYPE=1
fi
if [ "$LOCKING_TYPE" = "3" ] || [ "$LOCKING_TYPE" = "2" ]; then
cat $CONFIGFILE - <<EOF > $TMPFILE
global {
# Enable locking for cluster LVM
locking_type = $LOCKING_TYPE
library_dir = "$LOCKINGLIBDIR"
# Disable lvmetad in cluster
use_lvmetad = 0
EOF
if [ $? != 0 ]
then
echo "failed to create temporary config file, $CONFIGFILE not updated"
exit 14
fi
if [ -n "$LOCKINGLIB" ]; then
cat - <<EOF >> $TMPFILE
locking_library = "$LOCKINGLIB"
EOF
if [ $? != 0 ]
then
echo "failed to create temporary config file, $CONFIGFILE not updated"
exit 16
fi
fi
cat - <<EOF >> $TMPFILE
}
EOF
fi # if we aren't setting cluster locking, we don't need to create a global section
if [ $? != 0 ]
then
echo "failed to create temporary config file, $CONFIGFILE not updated"
exit 17
fi
else
#
# We have a "global {" section, so add or replace the
# locking entries as appropriate
#
if [ -n "$LOCKING_TYPE" ]; then
if [ "$have_type" = "0" ]
then
SEDCMD=" s/^[[:blank:]]*locking_type[[:blank:]]*=.*/\ \ \ \ locking_type = $LOCKING_TYPE/g"
else
SEDCMD=" /global[[:blank:]]*{/a\ \ \ \ locking_type = $LOCKING_TYPE"
fi
fi
if [ -n "$LOCKINGLIBDIR" ]; then
if [ "$have_dir" = "0" ]
then
SEDCMD="${SEDCMD}\ns'^[[:blank:]]*library_dir[[:blank:]]*=.*'\ \ \ \ library_dir = \"$LOCKINGLIBDIR\"'g"
else
SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ library_dir = \"$LOCKINGLIBDIR\""
fi
fi
if [ -n "$LOCKINGLIB" ]; then
if [ "$have_library" = "0" ]
then
SEDCMD="${SEDCMD}\ns/^[[:blank:]]*locking_library[[:blank:]]*=.*/\ \ \ \ locking_library = \"$LOCKINGLIB\"/g"
else
SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ locking_library = \"$LOCKINGLIB\""
fi
fi
if [ "$have_use_lvmetad" = "0" ]
then
SEDCMD="${SEDCMD}\ns'^[[:blank:]]*use_lvmetad[[:blank:]]*=.*'\ \ \ \ use_lvmetad = $USE_LVMETAD'g"
else
SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ use_lvmetad = $USE_LVMETAD"
fi
echo -e $SEDCMD > $SCRIPTFILE
sed <$CONFIGFILE >$TMPFILE -f $SCRIPTFILE
if [ $? != 0 ]
then
echo "sed failed, $CONFIGFILE not updated"
exit 15
fi
fi
# Now we have a suitably editted config file in a temp place,
# backup the original and copy our new one into place.
cp $CONFIGFILE $CONFIGFILE.lvmconfold
if [ $? != 0 ]
then
echo "failed to backup old config file, $CONFIGFILE not updated"
exit 2
fi
cp $TMPFILE $CONFIGFILE
if [ $? != 0 ]
then
echo "failed to copy new config file into place, check $CONFIGFILE is still OK"
exit 3
fi
rm -f $SCRIPTFILE $TMPFILE
function set_service {
local type="$1"
local action="$2"
shift 2
if [ "$type" = "systemd" ]; then
if [ "$action" = "activate" ]; then
for i in $@; do
eval $($SYSTEMCTL_BIN show $i -p LoadState)
test "$LoadState" = "loaded" || continue
$SYSTEMCTL_BIN enable $i
if [ "$START_STOP_SERVICES" = "1" ]; then
$SYSTEMCTL_BIN start $i
fi
done
elif [ "$action" = "deactivate" ]; then
for i in $@; do
eval $($SYSTEMCTL_BIN show $i -p LoadState)
test "$LoadState" = "loaded" || continue
$SYSTEMCTL_BIN disable $i
if [ "$START_STOP_SERVICES" = "1" ]; then
$SYSTEMCTL_BIN stop $i
fi
done
fi
elif [ "$type" = "sysv" ]; then
if [ "$action" = "activate" ]; then
for i in $@; do
$CHKCONFIG_BIN --list $i > /dev/null || continue
$CHKCONFIG_BIN $i on
if [ "$START_STOP_SERVICES" = "1" ]; then
$SERVICE_BIN $i start
fi
done
elif [ "$action" = "deactivate" ]; then
for i in $@; do
$CHKCONFIG_BIN --list $i > /dev/null || continue
if [ "$START_STOP_SERVICES" = "1" ]; then
$SERVICE_BIN $i stop
fi
$CHKCONFIG_BIN $i off
done
fi
fi
}
# Start/stop and enable/disable services if needed.
if [ "$HANDLE_SERVICES" == "1" ]; then
SYSTEMCTL_BIN=$(which systemctl 2>/dev/null)
CHKCONFIG_BIN=$(which chkconfig 2>/dev/null)
SERVICE_BIN=$(which service 2>/dev/null)
# Systemd services
if [ -n "$SYSTEMCTL_BIN" ]; then
if [ "$USE_LVMETAD" = "0" ]; then
set_service systemd deactivate lvm2-lvmetad.service lvm2-lvmetad.socket
else
set_service systemd activate lvm2-lvmetad.socket
fi
if [ "$LOCKING_TYPE" = "3" ]; then
set_service systemd activate lvm2-cluster-activation.service
if [ "$HANDLE_MIRROR_SERVICE" = "1" ]; then
set_service activate lvm2-cmirrord.service
fi
else
set_service systemd deactivate lvm2-cluster-activation.service
if [ "$HANDLE_MIRROR_SERVICE" = "1" ]; then
set_service systemd deactivate lvm2-cmirrord.service
fi
fi
# System V init scripts
elif [ -n "$SERVICE_BIN" -a -n "$CHKCONFIG_BIN" ]; then
if [ "$USE_LVMETAD" = "0" ]; then
set_service sysv deactivate lvm2-lvmetad
else
set_service sysv activate lvm2-lvmetad
fi
if [ "$LOCKING_TYPE" = "3" ]; then
set_service sysv activate clvmd
if [ "$HANDLE_MIRROR_SERVICE" = "1" ]; then
set_service sysv activate cmirrord
fi
else
set_service sysv deactivate clvmd
if [ "$HANDLE_MIRROR_SERVICE" = "1" ]; then
set_service sysv deactivate cmirrord
fi
fi
# None of the service tools found, error out
else
echo "Missing tools to handle services"
exit 20
fi
fi