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