mirror of
git://sourceware.org/git/lvm2.git
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163 lines
3.8 KiB
Bash
163 lines
3.8 KiB
Bash
#!/bin/bash
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#
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# Edit an lvm.conf file to enable cluster locking.
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#
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# $1 is the directory where the locking library is installed.
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# $2 (optional) is the config file
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# $3 (optional) is the locking library name
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#
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#
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PREFIX=$1
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LVMCONF=$2
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LIB=$3
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if [ -z "$PREFIX" ]
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then
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echo "usage: $0 <prefix> [<config file>] [<library>]"
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echo ""
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echo "<prefix>|UNDO location of the cluster locking shared library. (no default)"
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echo " UNDO will reset the locking back to local"
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echo "<config file> name of the LVM config file (default: /etc/lvm/lvm.conf)"
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echo "<library> name of the shared library (default: liblvm2clusterlock.so)"
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echo ""
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exit 0
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fi
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[ -z "$LVMCONF" ] && LVMCONF="/etc/lvm/lvm.conf"
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[ -z "$LIB" ] && LIB="liblvm2clusterlock.so"
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if [ "$PREFIX" = "UNDO" ]
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then
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locking_type="1"
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else
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locking_type="2"
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if [ "${PREFIX:0:1}" != "/" ]
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then
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echo "Prefix must be an absolute path name (starting with a /)"
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exit 12
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fi
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if [ ! -f "$PREFIX/$LIB" ]
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then
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echo "$PREFIX/$LIB does not exist, did you do a \"make install\" ?"
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exit 11
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fi
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fi
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if [ ! -f "$LVMCONF" ]
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then
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echo "$LVMCONF does not exist"
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exit 10
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fi
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SCRIPTFILE=`mktemp -t lvmscript.XXXXXXXXXX`
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TMPFILE=`mktemp -t lvmtmp.XXXXXXXXXX`
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# Flags so we know which parts of the file we can replace and which need
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# adding. These are return codes from grep, so zero means it IS present!
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have_type=1
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have_dir=1
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have_library=1
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have_global=1
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grep -q '^[[:blank:]]*locking_type[[:blank:]]*=' $LVMCONF
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have_type=$?
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grep -q '^[[:blank:]]*library_dir[[:blank:]]*=' $LVMCONF
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have_dir=$?
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grep -q '^[[:blank:]]*locking_library[[:blank:]]*=' $LVMCONF
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have_library=$?
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# Those options are in section "global {" so we must have one if any are present.
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if [ "$have_type" = "0" -o "$have_dir" = "0" -o "$have_library" = "0" ]
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then
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# See if we can find it...
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grep -q '^[[:blank:]]*global[[:blank:]]*{' $LVMCONF
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have_global=$?
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if [ "$have_global" = "1" ]
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then
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echo "global keys but no 'global {' found, can't edit file"
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exit 12
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fi
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fi
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# So if we don't have "global {" we need to create one and
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# populate it
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if [ "$have_global" = "1" ]
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then
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cat $LVMCONF - <<EOF > $TMPFILE
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global {
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# Enable locking for cluster LVM
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locking_type = $locking_type
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library_dir = "$PREFIX"
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locking_library = "$LIB"
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}
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EOF
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if [ $? != 0 ]
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then
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echo "failed to create temporary config file, $LVMCONF not updated"
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exit 1
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fi
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else
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#
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# We have a "global {" section, so add or replace the
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# locking entries as appropriate
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#
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if [ "$have_type" = "0" ]
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then
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SEDCMD=" s/^[[:blank:]]*locking_type[[:blank:]]*=.*/\ \ \ \ locking_type = $locking_type/g"
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else
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SEDCMD=" /global[[:blank:]]*{/a\ \ \ \ locking_type = 2"
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fi
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if [ "$have_dir" = "0" ]
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then
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SEDCMD="${SEDCMD}\ns'^[[:blank:]]*library_dir[[:blank:]]*=.*'\ \ \ \ library_dir = \"$PREFIX\"'g"
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else
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SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ library_dir = \"$PREFIX\""
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fi
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if [ "$have_library" = "0" ]
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then
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SEDCMD="${SEDCMD}\ns/^[[:blank:]]*locking_library[[:blank:]]*=.*/\ \ \ \ locking_library = \"$LIB\"/g"
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else
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SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ locking_library = \"$LIB\""
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fi
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echo -e $SEDCMD > $SCRIPTFILE
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sed <$LVMCONF >$TMPFILE -f $SCRIPTFILE
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if [ $? != 0 ]
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then
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echo "sed failed, $LVMCONF not updated"
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exit 1
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fi
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fi
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# Now we have a suitably editted config file in a temp place,
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# backup the original and copy our new one into place.
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cp $LVMCONF $LVMCONF.nocluster
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if [ $? != 0 ]
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then
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echo "failed to backup old config file, $LVMCONF not updated"
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exit 2
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fi
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cp $TMPFILE $LVMCONF
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if [ $? != 0 ]
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then
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echo "failed to copy new config file into place, check $LVMCONF is still OK"
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exit 3
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fi
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rm -f $SCRIPTFILE $TMPFILE
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