diff --git a/README.md b/README.md index 37670a9..07ee4bf 100644 --- a/README.md +++ b/README.md @@ -16,6 +16,7 @@ Pick one of the options below using the following settings: * **DOMAIN:** The domain your subdomain is registered at. (i.e. `foo.com` for `home.foo.com`) * **NAME:** Subdomain to use. (name in A record) (i.e. `home` for `home.foo.com`). Multiple subdomains must be separated by semicolons `;` * **SLEEP_INTERVAL:** Polling time in seconds. (default: 300) +* **REMOVE_DUPLICATES:** If set to `"true"`, removes extra DNS records if more than one A record is found on a subdomain. *Note that if this is not enabled, the script will NOT update subdomains with more than one A record* (default: false) ### Docker (Recommended) @@ -26,6 +27,7 @@ $ docker run -d --name dyndns \ -e DOMAIN="yourdomain.com" \ -e NAME="subdomain" \ -e SLEEP_INTERVAL=2 \ + -e REMOVE_DUPLICATES="true" \ tunix/digitalocean-dyndns ``` diff --git a/dyndns.sh b/dyndns.sh index acf6409..cead896 100755 --- a/dyndns.sh +++ b/dyndns.sh @@ -2,6 +2,7 @@ api_host="https://api.digitalocean.com/v2" sleep_interval=${SLEEP_INTERVAL:-300} +remove_duplicates=${REMOVE_DUPLICATES:-"false"} services=( "ifconfig.co" @@ -45,17 +46,21 @@ while ( true ); do record_data=$(echo $domain_records| jq -r ".domain_records[] | select(.type == \"A\" and .name == \"$sub\") | .data") if [ $(echo "$record_id" | wc -l) -ge 2 ]; then : - echo "'$sub' domain name has duplicate DNS records, removing duplicates" - record_id_to_delete=$(echo "$record_id"| tail -n +2) - record_id=$(echo "$record_id"| head -1) - record_data=$(echo "$record_data"| head -1) + if [[ "${remove_duplicates}" == "true" ]]; then : + echo "'$sub' domain name has duplicate DNS records, removing duplicates" + record_id_to_delete=$(echo "$record_id"| tail -n +2) + record_id=$(echo "$record_id"| head -1) + record_data=$(echo "$record_data"| head -1) - while IFS= read -r line; do - curl -s -X DELETE \ - -H "Content-Type: application/json" \ - -H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \ - "$dns_list/$line" &> /dev/null - done <<< "$record_id_to_delete" + while IFS= read -r line; do + curl -s -X DELETE \ + -H "Content-Type: application/json" \ + -H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \ + "$dns_list/$line" &> /dev/null + done <<< "$record_id_to_delete" + else : + echo "Unable to update '$sub' domain name as it has duplicate DNS records. Set REMOVE_DUPLICATES='true' to remove them." + continue fi # re-enable glob expansion