bundlewrap/bundles/unbound/files/unbound-auto-restart
2021-08-19 20:03:24 +02:00

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#!/bin/bash
now="$(date +%s)"
resolved="$(dig +short kunbox.net)"
if [[ -n "$resolved" ]]
then
echo "$now" > /var/tmp/unbound_last_resolved
exit 0
fi
last_resolved="$(cat /var/tmp/unbound_last_resolved)"
five_min_ago="$(expr $now - 300)"
if [[ "$last_resolved" -lt "$five_min_ago" ]]
then
systemctl restart unbound
# Write "in 25 minutes" timestamp to /var/tmp/unbound_last_resolved.
# If resolving gets fixed by the restart, this will get re-written
# on the next run of this script. If not, this script will restart
# unbound again in half an hour (25min plus 5min grace time).
echo "$(expr $now + 1500)" > /var/tmp/unbound_last_resolved
fi