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#!/bin/sh
#
#
# Copyright (c) 2006, Huang Zhen <zhen.huang@gmail.com>
# Converting original heartbeat RA to OCF RA.
#
# Copyright (C) 2004 Horms <horms@verge.net.au>
#
# Based on IPaddr2: Copyright (C) 2003 Tuomo Soini <tis@foobar.fi>
#
# License: GNU General Public License (GPL)
# Support: linux-ha@lists.linux-ha.org
#
# This script send out gratuitous Arp for an IP address
#
# It can be used _instead_ of the IPaddr2 or IPaddr resource
# to send gratuitous arp for an IP address on a given interface,
# without adding the address to that interface. I.e. if for
# some reason you want to send gratuitous arp for addresses
# managed by IPaddr2 or IPaddr on an additional interface.
#
# OCF parameters are as below:
# OCF_RESKEY_ip
# OCF_RESKEY_nic
#
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like. Any license provided herein, whether implied or
# otherwise, applies only to this software file. Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
#######################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/resource.d/heartbeat}
. ${OCF_FUNCTIONS_DIR}/.ocf-shellfuncs
SENDARP=$HA_BIN/send_arp
VLDIR=${HA_RSCTMP}/IPaddr
SENDARPPIDDIR=${HA_RSCTMP}/send_arp
BASEIP="$OCF_RESKEY_ip"
INTERFACE="$OCF_RESKEY_nic"
RESIDUAL=""
SENDARPPIDFILE="$SENDARPPIDDIR/send_arp-$BASEIP"
# Set default values
: ${ARP_INTERVAL_MS=200} # milliseconds between ARPs
: ${ARP_REPEAT=5} # repeat count
: ${ARP_BACKGROUND=yes} # no to run in foreground
: ${ARP_NETMASK=ffffffffffff} # netmask for ARP
#######################################################################
sendarp_meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="SendArp" version="1.0">
<version>1.0</version>
<longdesc lang="en">
This script send out gratuitous Arp for an IP address
</longdesc>
<shortdesc lang="en">Broadcasts unsolicited ARP announcements</shortdesc>
<parameters>
<parameter name="ip" unique="0" required="1">
<longdesc lang="en">
The IP address for sending arp package.
</longdesc>
<shortdesc lang="en">IP address</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="nic" unique="0" required="1">
<longdesc lang="en">
The nic for sending arp package.
</longdesc>
<shortdesc lang="en">NIC</shortdesc>
<content type="string" default="" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="90" />
<action name="stop" timeout="100" />
<action name="monitor" depth="0" timeout="20" interval="10" />
<action name="meta-data" timeout="5" />
<action name="validate-all" timeout="30" />
</actions>
</resource-agent>
END
}
#######################################################################
sendarp_usage() {
cat <<END
usage: $0 {start|stop|monitor|validate-all|meta-data}
Expects to have a fully populated OCF RA-compliant environment set.
END
}
#
# Check if ip-address is running.
# We return stopped or running.
#
sendarp_status() {
if
[ -f "$SENDARPPIDFILE" ]
then
return $OCF_SUCCESS
else
return $OCF_NOT_RUNNING
fi
}
#
# Send gratuitous arp
#
sendarp_start() {
sendarp_validate
if [ $? = $OCF_ERR_ARGS ]; then
return $OCF_ERR_ARGS;
fi
sendarp_status
if [ $? = $OCF_SUCCESS ]; then
return $OCF_SUCCESS;
fi
[ -r ${HA_CONFDIR}/arp_config ] && . ${HA_CONFDIR}/arp_config
if [ -r "${HA_CONFDIR}/arp_config:${TARGET_INTERFACE}" ]; then
. "${HA_CONFDIR}/arp_config:${TARGET_INTERFACE}"
fi
ARGS="-i $ARP_INTERVAL_MS -r $ARP_REPEAT -p $SENDARPPIDFILE $INTERFACE $BASEIP auto $BASEIP $ARP_NETMASK"
ocf_log debug "$SENDARP $ARGS"
case $ARP_BACKGROUND in
yes)
($SENDARP $ARGS ||
(ocf_log err "Could not send gratuitous arps";return $OCF_ERR_GENERIC)) &
;;
*)
$SENDARP $ARGS || (ocf_log err "Could not send gratuitous arps"; return $OCF_ERR_GENERIC)
;;
esac
return $OCF_SUCCESS;
}
#
# Stop sending gratuitous arp
#
sendarp_stop() {
sendarp_validate
if [ $? = $OCF_ERR_ARGS ]; then
return $OCF_ERR_ARGS;
fi
rc=$OCF_SUCCESS
if
[ -f "$SENDARPPIDFILE" ]
then
kill `cat "$SENDARPPIDFILE"`
rc=$?
case $rc in
0)
ocf_log info "killed previously running send_arp for $BASEIP"
rm -f "$SENDARPPIDFILE"
rc=$OCF_SUCCESS
;;
*)
ocf_log warn "Could not kill previously running send_arp for $BASEIP"
rc=$OCF_ERR_GENERIC
;;
esac
fi
case $rc in
$OCF_SUCCESS)
ocf_log info "SendArp for $BASEIP/$INTERFACE released"
;;
*)
ocf_log warn "SendArp for $BASEIP/$INTERFACE NOT released"
;;
esac
return $rc
}
#
# This is always active, because it doesn't do much
#
sendarp_monitor() {
return $OCF_SUCCESS
}
sendarp_validate() {
if [ -z "$INTERFACE" -o -z "$BASEIP" -o -n "$RESIDUAL" ]
then
return $OCF_ERR_ARGS
fi
return $OCF_SUCCESS
}
case $__OCF_ACTION in
meta-data) sendarp_meta_data
exit $OCF_SUCCESS
;;
start) sendarp_start
;;
stop) sendarp_stop
;;
monitor) sendarp_monitor
;;
status) sendarp_status
if [ $? = $OCF_SUCCESS ]; then
echo "running"
exit $OCF_SUCCESS;
else
echo "stopped"
exit $OCF_NOT_RUNNING;
fi
;;
validate-all) sendarp_validate
;;
usage|help) sendarp_usage
exit $OCF_SUCCESS
;;
*) sendarp_usage
exit $OCF_ERR_UNIMPLEMENTED
;;
esac

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Sun, Jul 20, 8:37 PM (1 d, 9 h)
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SendArp (6 KB)

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