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lvm2/scripts/lvmconf.sh
Peter Rajnoha f814d763c6 lvmconf: add --enable-halvm, --disable-halvm, --services, --mirrorservice, --startstopservices options and use proper global/use_lvmetad default value 
This patch adds new options to lvmconf:

  --enable-halvm (just like --enable-cluster, but configure LVM
                  for use in HA LVM - meaning disabling lvmetad and
                  making sure we have locking_type=1)

  --disable-halvm (just like --disable-cluster, but configure LVM
                   back from HA LVM - meaning enabling lvmetad if
                   it's enabled by default and making sure we have
                   default locking type set)

  --services (causes clvmd and lvmetad services to be enabled or
              disabled appropriately and conforming to the changes
              in lvm configuration we've just made with lvmconf)

  --mirrorservice (in addition to clvmd and lvmetad services, also
                   enable or disable cmirrord service appropriately;
                   this is a separate option because cmirrord is
                   optional and it doesn't need to be always enabled
                   when clvmd is enabled)

  --startstopservices (in addition to enabling or disabling services,
                       start and stop these services immediately)

These options are supposed to help users to make their system ready
for cluster with clvmd (active-active) or HA LVM (active-passive) use
while lvmconf script can handle services as well so users don't need
to bother about setting them manually.

Also, before this patch, we hardcoded global/use_lvmetad=0 as default
value in lvmconf script. Howeverm this default may change by just
flipping the value in config_settings.h and we may forget to edit
the lvmconf. It's better to use lvm dumpconfig --type default global/use_lvmetad
to get the actual default value and use this one instead of hardcoded one.
2015-04-13 15:27:17 +02:00

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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 ""
}
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=$2
shift 2
else
usage
exit 1
fi
;;
--services)
HANDLE_SERVICES=1
shift
;;
--mirrorservice)
HANDLE_MIRROR_SERVICE=1
shift
;;
--startstopservices)
START_STOP_SERVICES=1
shift
;;
*)
usage
exit 1
esac
done
}
function validate_args
{
[ -z "$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 [ "$HANDLE_CMIRROR_SERVICE" ]; then
set_service activate lvm2-cmirrord.service
fi
else
set_service systemd deactivate lvm2-cluster-activation.service
if [ "$HANDLE_CMIRROR_SERVICE" ]; 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
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