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wanmonitor
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This commit is contained in:
belliash 2018-04-23 17:40:01 +02:00
parent 8e81f27174
commit 1f42489bba
3 changed files with 41 additions and 11 deletions
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1
README.md
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@ -4,6 +4,7 @@ WAN Monitor & Failover Connection Manager
All configuration is done in /etc/config/wanmonitor file. Options available:
* check_host - IP address of remote host used to check Internet connectivity
* interval - Number of seconds to wait between checks
* sleep - number of seconds to wait for slow links during startup
* wan_primary - Primary WAN interface name to use
* wan_secondary - Secondary WAN interface name to use

1
files/etc/config/wanmonitor
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@ -1,5 +1,6 @@
config wanmonitor
option check_host '8.8.4.4'
option interval '5'
option sleep '0'
option wan_primary 'wan1'
option wan_secondary 'wan2'

50
files/usr/bin/wanmonitor
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@ -13,16 +13,13 @@ LOGGER_NOTICE=5
LOGGER_INFO=6
LOGGER_DEBUG=7
CHECK_HOST=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].check_host)
INTERVAL=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].interval)
SLEEP=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].sleep)
WAN_PRIMARY=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].wan_primary)
WAN_SECONDARY=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].wan_secondary)
function initialize() {
/usr/bin/logger -t $0 -p ${LOGGER_NOTICE} "Starting WAN Monitor ..."
sleep 60
/usr/bin/logger -t $0 -p ${LOGGER_NOTICE} "Initializing WAN Monitor & Failover Connection Manager"
CHECK_HOST=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].check_host)
INTERVAL=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].interval)
WAN_PRIMARY=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].wan_primary)
WAN_SECONDARY=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].wan_secondary)
network_get_device IFNAME_WAN_PRIMARY ${WAN_PRIMARY}
network_get_gateway GATEWAY_WAN_PRIMARY ${WAN_PRIMARY}
network_get_device IFNAME_WAN_SECONDARY ${WAN_SECONDARY}
@ -49,6 +46,13 @@ function initialize() {
if [ "x${GATEWAY_WAN_SECONDARY}" = "x" ]; then
GATEWAY_WAN_SECONDARY=$(ifstatus ${WAN_SECONDARY} | grep -A 2 "\"target\": \"0.0.0.0\"," | awk '/nexthop/ {gsub(/[",]/, "");print $2}')
fi
}
function prepare() {
/usr/bin/logger -t $0 -p ${LOGGER_NOTICE} "Starting WAN Monitor ..."
sleep ${SLEEP}
/usr/bin/logger -t $0 -p ${LOGGER_NOTICE} "Initializing WAN Monitor & Failover Connection Manager"
initialize
for IFNAME_WAN in ${IFNAME_WAN_PRIMARY} ${IFNAME_WAN_SECONDARY}; do
if [ "x${IFNAME_WAN}" = "x" ]; then
@ -69,6 +73,29 @@ function initialize() {
/usr/bin/logger -t $0 -p ${LOGGER_DEBUG} "Checking host: ${CHECK_HOST} every ${INTERVAL} seconds interval"
}
function status() {
echo -e "Primary WAN Interface: ${IFNAME_WAN_PRIMARY}, Gateway: ${GATEWAY_WAN_PRIMARY}"
echo -e "Secondary WAN Interface ${IFNAME_WAN_SECONDARY}, Gateway: ${GATEWAY_WAN_SECONDARY}"
echo -e "Checking host: ${CHECK_HOST} every ${INTERVAL} seconds interval"
echo
ACTIVE=$(/bin/ps | grep 'wanmonitor -d' | grep -v 'grep' | wc -l)
if [ "x${ACTIVE}" = "x0" ]; then
echo -e "WAN Monitor & Failover Connection Manager is NOT RUNNING"
else
echo -e "WAN Monitor & Failover Connection Manager is RUNNING"
fi
ACTIVE_INTERFACE=$(route | grep default | awk '{print $8}')
if [ "x${ACTIVE_INTERFACE}" = "x${IFNAME_WAN_PRIMARY}" ]; then
ACTIVE_WAN="${WAN_PRIMARY}"
elif [ "x${ACTIVE_INTERFACE}" = "x${IFNAME_WAN_SECONDARY}" ]; then
ACTIVE_WAN="${WAN_SECONDARY}"
else
ACTIVE_WAN="UNKNOWN"
fi
echo -e "Active WAN connection: ${ACTIVE_WAN}"
}
until [[ -z "${1}" ]]; do
case "${1}" in
-d|--daemon)
@ -83,11 +110,12 @@ until [[ -z "${1}" ]]; do
done
if [ "x${DAEMONIZE}" = "x0" ]; then
echo "This program can be running only as daemon. Please use init script."
initialize
status
exit 0
fi
initialize
prepare
/usr/bin/logger -t $0 -p ${LOGGER_NOTICE} "Entering link monitoring loop ..."
WAN=0
while true; do