67 lines
1.7 KiB
Bash
Executable file
67 lines
1.7 KiB
Bash
Executable file
#!/bin/sh
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# Watchdog for the primary name server.
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export PATH=/bin:/sbin:/usr/bin:/usr/sbin
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REMOTE="gandi"
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REMOTE_DIR="/var/powerdns/"
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DIR="$REMOTE_DIR"
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VERBOSITY="0"
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echo "directory: $DIR"
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local_update() {
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[ "$VERBOSITY" = "1" ] && echo "local update of domain $1"
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pdns_control bind-reload-now $1 | grep "no such domain"
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# In case the update cannot be done, it might be because the zone wasn't loaded at all.
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if [ $? -eq 0 ]; then
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pdns_control bind-add-zone $1 $DIR/$1
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fi
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}
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local_delete() {
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[ "$VERBOSITY" = "1" ] && echo "TODO: local delete of domain $1"
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}
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remote_update() {
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[ "$VERBOSITY" = "1" ] && echo "remote update on $REMOTE $REMOTE_DIR/$1"
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scp -q $DIR/$1 $REMOTE:$REMOTE_DIR
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}
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remote_delete() {
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[ "$VERBOSITY" = "1" ] && echo "remote delete on $REMOTE $REMOTE_DIR/$1"
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ssh -q $REMOTE rm $REMOTE_DIR/$1
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}
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action() {
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event=$1
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file=$2
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echo $event | grep "MOVED_TO" >/dev/null
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if [ $? -eq 0 ]; then
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echo "$file has been modified"
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local_update $file
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remote_update $file
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fi
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echo $event | grep "DELETE" >/dev/null
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if [ $? -eq 0 ]; then
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echo "$file has been deleted"
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local_delete $file
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remote_delete $file
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fi
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}
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# NOTE: dnsmanagerd writes bind9 files in $DIR and with a suffix ".wip" then moves them
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# to remove the suffix. This way, the final file is expected to never be corrupted,
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# for example by copying it to the secondary DNS server while the zone not being
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# fully written to the file.
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#
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# Therefore, the different interesting actions we should monitor are:
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# - moved_to: a zone file has been modified
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# - delete: a domain has been removed
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opts="-e moved_to -e delete -m"
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echo "inotifywait ${opts} --format '%:e %f' $DIR"
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inotifywait ${opts} --format '%:e %f' $DIR | while read LINE; do action $LINE ; done
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