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only update if IP changed

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Signed-off-by: Jeff Billimek <jeff@billimek.com>
This commit is contained in:
Jeff Billimek 2018-09-28 20:37:09 -04:00
parent ce9d8451f2
commit 4f99eff7ae
1 changed files with 9 additions and 6 deletions
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5
dyndns.sh
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@ -20,6 +20,7 @@ while ( true ); do
-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \ -H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
$dns_list) $dns_list)
record_id=$(echo $domain_records| jq ".domain_records[] | select(.type == \"A\" and .name == \"$NAME\") | .id") record_id=$(echo $domain_records| jq ".domain_records[] | select(.type == \"A\" and .name == \"$NAME\") | .id")
record_data=$(echo $domain_records| jq -r ".domain_records[] | select(.type == \"A\" and .name == \"@\") | .data")
test -z $record_id && die "No record found with given domain name!" test -z $record_id && die "No record found with given domain name!"
@ -28,13 +29,15 @@ while ( true ); do
url="$dns_list/$record_id" url="$dns_list/$record_id"
if [[ -n $ip ]]; then if [[ -n $ip ]]; then
echo "Sending data=$data to url=$url" if [[ "$ip" != "$record_data" ]]; then
echo "existing DNS record address ($record_data) doesn't match current IP ($ip), sending data=$data to url=$url"
curl -s -X PUT \ curl -s -X PUT \
-H "Content-Type: application/json" \ -H "Content-Type: application/json" \
-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \ -H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
-d "$data" \ -d "$data" \
"$url" &> /dev/null "$url" &> /dev/null
fi
else else
echo "IP wasn't retrieved within allowed interval. Will try $sleep_interval seconds later.." echo "IP wasn't retrieved within allowed interval. Will try $sleep_interval seconds later.."
fi fi