/usr/lib/ocf/resource.d/heartbeat/ethmonitor is in resource-agents 1:3.9.2-5ubuntu4.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 | #!/bin/sh
#
# OCF Resource Agent compliant script.
# Monitor the vitality of a local network interface.
#
# Based on the work by Robert Euhus and Lars Marowsky-Brée.
#
# Transfered from Ipaddr2 into ethmonitor by Alexander Krauth
#
# Copyright (c) 2011 Robert Euhus, Alexander Krauth, Lars Marowsky-Brée
# All Rights Reserved.
#
# 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.
#
# OCF parameters are as below
#
# OCF_RESKEY_interface
# OCF_RESKEY_multiplicator
# OCF_RESKEY_name
# OCF_RESKEY_repeat_count
# OCF_RESKEY_repeat_interval
# OCF_RESKEY_pktcnt_timeout
# OCF_RESKEY_arping_count
# OCF_RESKEY_arping_timeout
# OCF_RESKEY_arping_cache_entries
#
# TODO: Check against IPv6
#
#######################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
#######################################################################
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="ethmonitor">
<version>1.2</version>
<longdesc lang="en">
Monitor the vitality of a local network interface.
You may setup this RA as a clone resource to monitor the network interfaces on different nodes, with the same interface name.
This is not related to the IP adress or the network on which a interface is configured.
You may use this RA to move resources away from a node, which has a faulty interface or prevent moving resources to such a node.
This gives you independend control of the resources, without involving cluster intercommunication. But it requires your nodes to have more than one network interface.
The resource configuration requires a monitor operation, because the monitor does the main part of the work.
In addition to the resource configuration, you need to configure some location contraints, based on a CIB attribute value.
The name of the attribute value is configured in the 'name' option of this RA.
Example constraint configuration:
location loc_connected_node my_resource_grp \
rule $id="rule_loc_connected_node" -INF: ethmonitor eq 0
The ethmonitor works in 3 different modes to test the interface vitality.
1. call ip to see if the link status is up (if link is down -> error)
2. call ip an watch the RX counter (if packages come around in a certain time -> success)
3. call arping to check wether any of the IPs found in the lokal ARP cache answers an ARP REQUEST (one answer -> success)
4. return error
</longdesc>
<shortdesc lang="en">Monitors network interfaces</shortdesc>
<parameters>
<parameter name="interface" unique="1" required="1">
<longdesc lang="en">
The name of the network interface which should be monitored (e.g. eth0).
</longdesc>
<shortdesc lang="en">Network interface name</shortdesc>
<content type="string" default=""/>
</parameter>
<parameter name="name" unique="1">
<longdesc lang="en">
The name of the CIB attribute to set. This is the name to be used in the constraints. Defaults to "ethmonitor-'interface_name'".
</longdesc>
<shortdesc lang="en">Attribute name</shortdesc>
<content type="string" default=""/>
</parameter>
<parameter name="multiplier" unique="0" >
<longdesc lang="en">
Multiplier for the value of the CIB attriobute specified in parameter name.
</longdesc>
<shortdesc lang="en">Multiplier for result variable</shortdesc>
<content type="integer" default="1"/>
</parameter>
<parameter name="repeat_count">
<longdesc lang="en">
Specify how often the interface will be monitored, before the status is set to failed. You need to set the timeout of the monitoring operation to at least repeat_count * repeat_interval
</longdesc>
<shortdesc lang="en">Monitor repeat count</shortdesc>
<content type="integer" default="5"/>
</parameter>
<parameter name="repeat_interval">
<longdesc lang="en">
Specify how long to wait in seconds between the repeat_counts.
</longdesc>
<shortdesc lang="en">Monitor repeat interval in seconds</shortdesc>
<content type="integer" default="10"/>
</parameter>
<parameter name="pktcnt_timeout">
<longdesc lang="en">
Timeout for the RX packet counter. Stop listening for packet counter changes after the given number of seconds.
</longdesc>
<shortdesc lang="en">packet counter timeout</shortdesc>
<content type="integer" default="5"/>
</parameter>
<parameter name="arping_count">
<longdesc lang="en">
Number of ARP REQUEST packets to send for every IP.
Usually one ARP REQUEST (arping) is send
</longdesc>
<shortdesc lang="en">Number of arpings per IP</shortdesc>
<content type="integer" default="1"/>
</parameter>
<parameter name="arping_timeout">
<longdesc lang="en">
Time in seconds to wait for ARP REQUESTs (all packets of arping_count).
This is to limit the time for arp requests, to be able to send requests to more than one node, without running in the monitor operation timeout.
</longdesc>
<shortdesc lang="en">Timeout for arpings per IP</shortdesc>
<content type="integer" default="1"/>
</parameter>
<parameter name="arping_cache_entries">
<longdesc lang="en">
Maximum number of IPs from ARP cache list to check for ARP REQUEST (arping) answers. Newest entries are tried first.
</longdesc>
<shortdesc lang="en">Number of ARP cache entries to try</shortdesc>
<content type="integer" default="5"/>
</parameter>
</parameters>
<actions>
<action name="start" timeout="20s" />
<action name="stop" timeout="20s" />
<action name="status" depth="0" timeout="20s" interval="10s" />
<action name="monitor" depth="0" timeout="20s" interval="10s" />
<action name="meta-data" timeout="5s" />
<action name="validate-all" timeout="20s" />
</actions>
</resource-agent>
END
exit $OCF_SUCCESS
}
#
# Return true, if the interface exists
#
is_interface() {
#
# List interfaces but exclude FreeS/WAN ipsecN virtual interfaces
#
local iface=`$IP2UTIL -o -f inet addr show | grep " $1 " \
| cut -d ' ' -f2 | sort -u | grep -v '^ipsec[0-9][0-9]*$'`
[ "$iface" != "" ]
}
if_init() {
local rc
if [ X"$OCF_RESKEY_interface" = "X" ]; then
ocf_log err "Interface name (the interface parameter) is mandatory"
exit $OCF_ERR_CONFIGURED
fi
NIC="$OCF_RESKEY_interface"
if is_interface $NIC
then
case "$NIC" in
*:*) ocf_log err "Do not specify a virtual interface : $OCF_RESKEY_interface"
exit $OCF_ERR_CONFIGURED;;
*) ;;
esac
else
case $__OCF_ACTION in
validate-all) ocf_log err "Interface $NIC does not exist"
exit $OCF_ERR_CONFIGURED;;
*) ocf_log warn "Interface $NIC does not exist"
## It might be a bond interface which is temporarily not available, therefore we want to continue here
;;
esac
fi
: ${OCF_RESKEY_multiplier:="1"}
if ! ocf_is_decimal "$OCF_RESKEY_multiplier"; then
ocf_log err "Invalid OCF_RESKEY_multiplier [$OCF_RESKEY_multiplier]"
exit $OCF_ERR_CONFIGURED
fi
ATTRNAME=${OCF_RESKEY_name:-"ethmonitor-$NIC"}
REP_COUNT=${OCF_RESKEY_repeat_count:-5}
if ! ocf_is_decimal "$REP_COUNT" -o [ $REP_COUNT -lt 1 ]; then
ocf_log err "Invalid OCF_RESKEY_repeat_count [$REP_COUNT]"
exit $OCF_ERR_CONFIGURED
fi
REP_INTERVAL_S=${OCF_RESKEY_repeat_interval:-10}
if ! ocf_is_decimal "$REP_INTERVAL_S"; then
ocf_log err "Invalid OCF_RESKEY_repeat_interval [$REP_INTERVAL_S]"
exit $OCF_ERR_CONFIGURED
fi
: ${OCF_RESKEY_pktcnt_timeout:="5"}
if ! ocf_is_decimal "$OCF_RESKEY_pktcnt_timeout"; then
ocf_log err "Invalid OCF_RESKEY_pktcnt_timeout [$OCF_RESKEY_pktcnt_timeout]"
exit $OCF_ERR_CONFIGURED
fi
: ${OCF_RESKEY_arping_count:="1"}
if ! ocf_is_decimal "$OCF_RESKEY_arping_count"; then
ocf_log err "Invalid OCF_RESKEY_arping_count [$OCF_RESKEY_arping_count]"
exit $OCF_ERR_CONFIGURED
fi
: ${OCF_RESKEY_arping_timeout:="1"}
if ! ocf_is_decimal "$OCF_RESKEY_arping_timeout"; then
ocf_log err "Invalid OCF_RESKEY_arping_timeout [$OCF_RESKEY_arping_count]"
exit $OCF_ERR_CONFIGURED
fi
: ${OCF_RESKEY_arping_cache_entries:="5"}
if ! ocf_is_decimal "$OCF_RESKEY_arping_cache_entries"; then
ocf_log err "Invalid OCF_RESKEY_arping_cache_entries [$OCF_RESKEY_arping_cache_entries]"
exit $OCF_ERR_CONFIGURED
fi
return $OCF_SUCCESS
}
# get the link status on $NIC
# asks ip about running (up) interfaces, returns the number of matching interface names that are up
get_link_status () {
$IP2UTIL -o link show up dev "$NIC" | grep -c "$NIC"
}
# returns the number of received rx packets on $NIC
get_rx_packets () {
ocf_log debug "$IP2UTIL -o -s link show dev $NIC"
$IP2UTIL -o -s link show dev "$NIC" \
| sed 's/.* RX: [^0-9]*[0-9]* *\([0-9]*\) .*/\1/'
# the first number after RX: ist the # of bytes ,
# the second is the # of packets received
}
# watch for packet counter changes for max. OCF_RESKEY_pktcnt_timeout seconds
# returns immedeately with return code 0 if any packets were received
# otherwise 1 is returned
watch_pkt_counter () {
local RX_PACKETS_NEW
local RX_PACKETS_OLD
RX_PACKETS_OLD="`get_rx_packets`"
for n in `seq $(( $OCF_RESKEY_pktcnt_timeout * 10 ))`; do
sleep 0.1
RX_PACKETS_NEW="`get_rx_packets`"
ocf_log debug "RX_PACKETS_OLD: $RX_PACKETS_OLD RX_PACKETS_NEW: $RX_PACKETS_NEW"
if [ "$RX_PACKETS_OLD" -ne "$RX_PACKETS_NEW" ]; then
ocf_log debug "we received some packets."
return 0
fi
done
return 1
}
# returns list of cached ARP entries for $NIC
# sorted by age ("last confirmed")
# max. OCF_RESKEY_arping_cache_entries entries
get_arp_list () {
$IP2UTIL -s neighbour show dev $NIC \
| sort -t/ -k2,2n | cut -d' ' -f1 \
| head -n $OCF_RESKEY_arping_cache_entries
# the "used" entries in `ip -s neighbour show` are:
# "last used"/"last confirmed"/"last updated"
}
# arping the IP given as argument $1 on $NIC
# until OCF_RESKEY_arping_count answers are received
do_arping () {
# TODO: add the source IP
# TODO: check for diffenrent arping versions out there
arping -q -c $OCF_RESKEY_arping_count -w $OCF_RESKEY_arping_timeout -I $NIC $1
# return with the exit code of the arping command
return $?
}
#
# Check the interface depending on the level given as parameter: $OCF_RESKEY_check_level
#
# 09: check for nonempty ARP cache
# 10: watch for packet counter changes
#
# 19: check arping_ip_list
# 20: check arping ARP cache entries
#
# 30: watch for packet counter changes in promiscios mode
#
# If unsuccessfull in levels 18 and above,
# the tests for higher check levels are run.
#
if_check () {
# always check link status first
link_status="`get_link_status`"
ocf_log debug "link_status: $link_status (1=up, 0=down)"
[ $link_status -eq 0 ] && return $OCF_NOT_RUNNING
# watch for packet counter changes
ocf_log debug "watch for packet counter changes"
watch_pkt_counter && return $OCF_SUCCESS
# check arping ARP cache entries
ocf_log debug "check arping ARP cache entries"
for ip in `get_arp_list`; do
do_arping $ip && return $OCF_SUCCESS
done
# watch for packet counter changes in promiscios mode
# ocf_log debug "watch for packet counter changes in promiscios mode"
# be sure switch off promiscios mode in any case
# TODO: check first, wether promisc is already on and leave it untouched.
# trap "$IP2UTIL link set dev $NIC promisc off; exit" INT TERM EXIT
# $IP2UTIL link set dev $NIC promisc on
# watch_pkt_counter && return $OCF_SUCCESS
# $IP2UTIL link set dev $NIC promisc off
# trap - INT TERM EXIT
# looks like it's not working (for whatever reason)
return $OCF_NOT_RUNNING
}
#######################################################################
if_usage() {
cat <<END
usage: $0 {start|stop|status|monitor|validate-all|meta-data}
Expects to have a fully populated OCF RA-compliant environment set.
END
}
set_cib_value() {
local score=`expr $1 \* $OCF_RESKEY_multiplier`
attrd_updater -n $ATTRNAME -v $score -q
local rc=$?
case $rc in
0) ocf_log debug "attrd_updater: Updated $ATTRNAME = $score" ;;
*) ocf_log warn "attrd_updater: Could not update $ATTRNAME = $score: rc=$rc";;
esac
return $rc
}
if_monitor() {
ha_pseudo_resource $OCF_RESOURCE_INSTANCE monitor
local pseudo_status=$?
if [ $pseudo_status -ne $OCF_SUCCESS ]; then
exit $pseudo_status
fi
local mon_rc=$OCF_NOT_RUNNING
local attr_rc=$OCF_NOT_RUNNING
local runs=0
local start_time
local end_time
local sleep_time
while [ $mon_rc -ne $OCF_SUCCESS -a $REP_COUNT -gt 0 ]
do
start_time=`date +%s%N`
if_check
mon_rc=$?
REP_COUNT=$(( $REP_COUNT - 1 ))
if [ $mon_rc -ne $OCF_SUCCESS -a $REP_COUNT -gt 0 ]; then
ocf_log warn "Monitoring of $OCF_RESOURCE_INSTANCE failed, $REP_COUNT retries left."
end_time=`date +%s%N`
sleep_time=`echo "scale=9; ( $start_time + ( $REP_INTERVAL_S * 1000000000 ) - $end_time ) / 1000000000" | bc -q 2> /dev/null`
sleep $sleep_time 2> /dev/null
runs=$(($runs + 1))
fi
if [ $mon_rc -eq $OCF_SUCCESS -a $runs -ne 0 ]; then
ocf_log info "Monitoring of $OCF_RESOURCE_INSTANCE recovered from error"
fi
done
ocf_log debug "Monitoring return code: $mon_rc"
if [ $mon_rc -eq $OCF_SUCCESS ]; then
set_cib_value 1
attr_rc=$?
else
ocf_log err "Monitoring of $OCF_RESOURCE_INSTANCE failed."
set_cib_value 0
attr_rc=$?
fi
## The resource should not fail, if the interface is down. It should fail, if the update of the CIB variable has errors.
## To react on the interface failure you must use constraints based on the CIB variable value, not on the resource itself.
exit $attr_rc
}
if_validate() {
check_binary $IP2UTIL
check_binary arping
if_init
}
case $__OCF_ACTION in
meta-data) meta_data
;;
usage|help) if_usage
exit $OCF_SUCCESS
;;
esac
if_validate
case $__OCF_ACTION in
start) ha_pseudo_resource $OCF_RESOURCE_INSTANCE start
exit $?
;;
stop) attrd_updater -D -n $ATTRNAME
ha_pseudo_resource $OCF_RESOURCE_INSTANCE stop
exit $?
;;
monitor|status) if_monitor
exit $?
;;
validate-all) exit $?
;;
*) if_usage
exit $OCF_ERR_UNIMPLEMENTED
;;
esac
|