64 lines
1.4 KiB
Bash
64 lines
1.4 KiB
Bash
# Checks DNS and restarts kresd if necessary
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# check prerequisites
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. /lib/functions.sh
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if [ ! -x "$(command -v host)" ]; then
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echo 'dnscheck error: host is not installed, exiting' >&2
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exit 1
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fi
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perform_check() {
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local host
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local server
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local timeout
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local maxfailures
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local failure=0
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config_get host check_service host "CHANGEME"
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config_get server check_service server "10.64.0.1"
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config_get timeout check_service timeout "5"
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config_get maxfailures check_service maxfailures "3"
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# check DNS
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host -w "${timeout}" "${host}" "${server}" &> /dev/null
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if [ $? -ne 0 ]; then
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failure=1
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logger -p err -t "dnscheck" "kresd failed to respond, ${failcount} of ${maxfailures}"
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let "failcount++"
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else
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if [ $failcount -ge 0 ]; then
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logger -p info -t "dnscheck" "kresd is responding again"
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fi
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failcount=0
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fi
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if [ $failcount -ge $maxfailures ]; then
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failcount=0
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logger -p err -t "dnscheck" "kresd not responding, restarting"
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# restart service
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/etc/init.d/resolver restart
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fi
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return $failure
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}
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# read configuration
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config_load dnscheck
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# check loop
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logger -p info -t "dnscheck" "Starting kresd monitoring"
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failcount=0
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while sleep 10; do
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perform_check ${job}
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if [ $? -ne 0 ]; then
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logger -p err -t "dnscheck" "kresd did not respond and was restarted"
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fi
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done
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exit 0
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