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#!/bin/sh
#
#
# LVM
#
# Description: Manages an LVM volume as an HA resource
#
#
# Author: Alan Robertson
# Support: linux-ha@lists.linux-ha.org
# License: GNU General Public License (GPL)
# Copyright: (C) 2002 - 2005 International Business Machines, Inc.
#
# This code significantly inspired by the LVM resource
# in FailSafe by Lars Marowsky-Bree
#
#
# An example usage in /etc/ha.d/haresources:
# node1 10.0.0.170 ServeRAID::1::1 LVM::myvolname
#
# See usage() function below for more details...
#
# OCF parameters are as below:
# OCF_RESKEY_volgrpname
#
#######################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/resource.d/heartbeat}
. ${OCF_FUNCTIONS_DIR}/.ocf-shellfuncs
#######################################################################
usage() {
methods=`LVM_methods`
methods=`echo $methods | tr ' ' '|'`
cat <<-!
usage: $0 $methods
$0 manages an Linux Volume Manager volume (LVM) as an HA resource
The 'start' operation brings the given volume online
The 'stop' operation takes the given volume offline
The 'status' operation reports whether the volume is available
The 'monitor' operation reports whether the volume seems present
The 'validate-all' operation checks whether the OCF parameters are valid
The 'methods' operation reports on the methods $0 supports
!
exit $OCF_ERR_GENERIC
}
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="LVM">
<version>1.0</version>
<longdesc lang="en">
Resource script for LVM. It manages an Linux Volume Manager volume (LVM)
as an HA resource.
</longdesc>
<shortdesc lang="en">Controls the availability of an LVM Volume Group</shortdesc>
<parameters>
<parameter name="volgrpname" unique="0" required="1">
<longdesc lang="en">
The name of volume group.
</longdesc>
<shortdesc lang="en">Volume group name</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="exclusive" unique="0" required="0">
<longdesc lang="en">
If set, the volume group will be activated exclusively.
</longdesc>
<shortdesc lang="en">Exclusive activation</shortdesc>
<content type="string" default="false" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="30" />
<action name="stop" timeout="30" />
<action name="status" timeout="30" />
<action name="monitor" depth="0" timeout="30" interval="10" />
<action name="methods" timeout="5" />
<action name="meta-data" timeout="5" />
<action name="validate-all" timeout="5" />
</actions>
</resource-agent>
END
}
#
# methods: What methods/operations do we support?
#
LVM_methods() {
cat <<-!
start
stop
status
monitor
methods
validate-all
usage
!
}
#
# Return LVM status (silently)
#
LVM_status() {
if
[ "$LVM_MAJOR" -eq "1" ]
then
vgdisplay $1 2>&1 | grep -i 'Status.*available' 2>&1 >/dev/null
return $?
else
vgdisplay -v $1 2>&1 | grep -i 'Status[ \t]*available' 2>&1 >/dev/null
return $?
fi
}
#
# Report on LVM volume status to stdout...
#
LVM_report_status() {
if
[ "$LVM_MAJOR" -eq "1" ]
then
VGOUT=`vgdisplay $1 2>&1`
echo "$VGOUT" | grep -i 'Status.*available' >/dev/null
rc=$?
else
VGOUT=`vgdisplay -v $1 2>&1`
echo "$VGOUT" | grep -i 'Status[ \t]*available' >/dev/null
rc=$?
fi
if
[ $rc -eq 0 ]
then
: Volume $1 is available
else
ocf_log debug "LVM Volume $1 is not available (stopped)"
return $OCF_NOT_RUNNING
fi
if
echo "$VGOUT" | grep -i 'Access.*read/write' >/dev/null
then
ocf_log debug "Volume $1 is available read/write (running)"
else
ocf_log debug "Volume $1 is available read-only (running)"
fi
return $OCF_SUCCESS
}
#
# Monitor the volume - does it really seem to be working?
#
#
LVM_monitor() {
if
LVM_status $1
then
: OK
else
ocf_log info "LVM Volume $1 is offline"
return $OCF_NOT_RUNNING
fi
vgck $1 >/dev/null 2>&1
return $?
}
#
# Enable LVM volume
#
LVM_start() {
# TODO: This MUST run vgimport as well
ocf_log info "Activating volume group $1"
if [ "$LVM_MAJOR" -eq "1" ]; then
ocf_run vgscan $1
else
ocf_run vgscan
fi
active_mode="ly"
if ocf_is_true "$OCF_RESKEY_exclusive" ; then
active_mode="ey"
fi
ocf_run vgchange -a $active_mode $1 || return $OCF_ERR_GENERIC
if LVM_status $1; then
: OK Volume $1 activated just fine!
return $OCF_SUCCESS
else
ocf_log err "LVM: $1 did not activate correctly"
return $OCF_NOT_RUNNING
fi
}
#
# Disable the LVM volume
#
LVM_stop() {
vgdisplay "$1" 2>&1 | grep 'Volume group .* not found' >/dev/null && {
ocf_log info "Volume group $1 not found"
return 0
}
ocf_log info "Deactivating volume group $1"
ocf_run vgchange -a ln $1 || return 1
if
LVM_status $1
then
ocf_log err "LVM: $1 did not stop correctly"
return $OCF_ERR_GENERIC
fi
# TODO: This MUST run vgexport as well
return $OCF_SUCCESS
}
#
# Check whether the OCF instance parameters are valid
#
LVM_validate_all() {
check_binary $AWK
# Off-the-shelf tests...
vgck "$VOLUME" >/dev/null 2>&1
if [ $? -ne 0 ]; then
ocf_log err "Volume group [$VOLUME] does not exist or contains error!"
exit $OCF_ERR_GENERIC
fi
# Double-check
if
[ "$LVM_MAJOR" -eq "1" ]
then
vgdisplay "$VOLUME" >/dev/null 2>&1
else
vgdisplay -v "$VOLUME" >/dev/null 2>&1
fi
if [ $? -ne 0 ]; then
ocf_log err "Volume group [$VOLUME] does not exist or contains error!"
exit $OCF_ERR_GENERIC
fi
return $OCF_SUCCESS
}
#
# 'main' starts here...
#
if
( [ $# -ne 1 ] )
then
usage
exit $OCF_ERR_ARGS
fi
case $1 in
meta-data) meta_data
exit $OCF_SUCCESS;;
methods) LVM_methods
exit $?;;
usage) usage
exit $OCF_SUCCESS;;
*) ;;
esac
if
[ -z "$OCF_RESKEY_volgrpname" ]
then
# echo "You must identify the volume group name!"
ocf_log err "You must identify the volume group name!"
# usage
exit $OCF_ERR_ARGS
fi
# Get the LVM version number, for this to work we assume(thanks to panjiam):
#
# LVM1 outputs like this
#
# # vgchange --version
# vgchange: Logical Volume Manager 1.0.3
# Heinz Mauelshagen, Sistina Software 19/02/2002 (IOP 10)
#
# LVM2 and higher versions output in this format
#
# # vgchange --version
# LVM version: 2.00.15 (2004-04-19)
# Library version: 1.00.09-ioctl (2004-03-31)
# Driver version: 4.1.0
LVM_VERSION=`vgchange --version 2>&1 | \
$AWK '/Logical Volume Manager/ {print $5"\n"; exit; }
/LVM version:/ {printf $3"\n"; exit;}'`
rc=$?
if
( [ $rc -ne 0 ] || [ -z "$LVM_VERSION" ] )
then
ocf_log err "LVM: $1 could not determine LVM version. Try 'vgchange --version' manually and modify $0 ?"
exit $OCF_ERR_INSTALLED
fi
LVM_MAJOR="${LVM_VERSION%%.*}"
VOLUME=$OCF_RESKEY_volgrpname
# What kind of method was invoked?
case "$1" in
start) LVM_start $VOLUME
exit $?;;
stop) LVM_stop $VOLUME
exit $?;;
status) LVM_report_status $VOLUME
exit $?;;
monitor) LVM_monitor $VOLUME
exit $?;;
validate-all) LVM_validate_all
;;
*) usage
exit $OCF_ERR_AEGS;;
esac

File Metadata

Mime Type
text/x-shellscript
Expires
Mon, Dec 23, 11:35 AM (1 d, 2 h)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
1121778
Default Alt Text
LVM (6 KB)

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