Add script to check powerdns records.

check-dns.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+# Script to download a list of records setup in PowerDNS and ping the linked A
+# and AAAA addresses, printing out those that do not answer. This allows to
+# find and clean legacy records. Written by sparrowhawk at work, anno domini
+# 2022.
+
+FILE=rc-records.txt
+
+
+ssh pdns.lnth.ch.recycled.cloud 'pdnsutil list-all-zones | while read -r zone; do pdnsutil list-zone $zone; done' >$FILE
+
+echo "IPv4:"
+awk '/.*\sA\s.*/ { print $1, $5 }' $FILE | sort | while read -r record;
+do
+	host=$(echo "$record" | cut -f1 -d' ')
+	addr=$(echo "$record" | cut -f2 -d' ')
+
+	if ! ping -c1 "$addr" >/dev/null;
+	then
+		echo "$host INEXISTANT"
+	fi
+done
+
+echo "IPv6:"
+awk '/.*\sAAAA\s.*/ { print $1, $5 }' $FILE | sort | while read -r record;
+do
+	host=$(echo "$record" | cut -f1 -d' ')
+	addr=$(echo "$record" | cut -f2 -d' ')
+
+	if ! ping -c1 "$addr" >/dev/null;
+	then
+		echo "$host INEXISTANT"
+	fi
+done