This is a simple dynamic DNS updater for the Gandi registrar. It uses their LiveDNS REST API to update the zone file for a subdomain of a domain to point at the external IPv4 address of the computer it has been run from.
Initially developed by cavebat on Debian 8 Jessie and tested on Debian 9 Stretch GNU/Linux using Python 2.7. Migrated to Python 3 and tested on Ubuntu 20.04.
With the new v5 Website, Gandi has also launched a new REST API which makes it easier to communicate via bash/curl or python/requests.
You want your homeserver to be always available at dynamic_subdomain.mydomain.tld.
apt-get update && apt-get upgrade && apt-get install unzip python3-requests python3-args python3-simplejson python3-netifaces
First, you must apply for an API key with Gandi. Visit https://account.gandi.net/en/ and apply for (at least) the production API key by following their directions.
Create the DNS A Records in the GANDI Webinterface which you want to update if your IP changes.
Download the Script from here as zip/tar.gz and extract it.
or clone from git
git clone https://github.com/wittypluck/gandi-live-dns.git
Then you'd need to configure the script in the src directory.
Copy example.config.py to config.py, and put it in the same directory as the script.
Edit the config file to fit your needs.
Start by retrieving your API Key from the "Security" section in new Gandi Account admin panel to be able to make authenticated requests to the API. api_secret = '---my_secret_API_KEY----'
Gandiv5 LiveDNS API Location http://doc.livedns.gandi.net/#api-endpoint
api_endpoint = 'https://dns.api.gandi.net/api/v5'
Your domain for the subdomains to be updated
All subdomains which should be updated. They get created if they do not yet exist.
subdomains = ["subdomain1", "subdomain2", "subdomain3"]
The first subdomain is used to find out the actual IP in the Zone Records.
And run the script:
root@dyndns:~/gandi-live-dns-master/src# ./gandi-live-dns.py
Checking dynamic IP: 127.0.0.1
Checking IP from DNS Record subdomain1: 127.0.0.1
IP Address Match - no further action
If your IP has changed, it will be detected and the update will be triggered.
root@dyndns:~/gandi-live-dns-master/src# ./gandi-live-dns.py
Checking dynamic IP: 127.0.0.2
Checking IP from DNS Record subdomain1: 127.0.0.1
IP Address Mismatch - going to update the DNS Records for the subdomains with new IP 127.0.0.2
Status Code: 201 , DNS Record Created , IP updated for subdomain1
Status Code: 201 , DNS Record Created , IP updated for subdomain2
Status Code: 201 , DNS Record Created , IP updated for subdomain3
root@dyndns:~/gandi-live-dns-master/src# ./gandi-live-dns.py -h
usage: gandi-live-dns.py [-h] [-f]
optional arguments:
-h, --help show this help message and exit
-f, --force force an update/create
-v, --verbose verbose mode
The force option runs the script, even when no IP change has been detected. It will update all subdomains and even create them if they are missing in the Zone File/Zone UUID. This can be used if additional/new subdomains get appended to the config file.
There exist several providers for this case, but better is to run your own somewhere.
On a LAMP Stack, place the file index.php in a directory /ip in your webroot.
root@laptop:~# curl https://blog.cavebeat.org/ip/
127.0.0.1
This should fit your personal needs and you still selfhost the whole thing.
IP address lookup service https://ifconfig.co
https://github.com/mpolden/ipd A simple service for looking up your IP address. This is the code that powers https://ifconfig.co
choose one as described in the config file.
Run the script every five minutes.
*/5 * * * * /root/gandi-live-dns-master/src/gandi-live-dns.py >/dev/null 2>&1
The XML-RPC API has a limit of 30 requests per 2 seconds, so i guess it's safe to update 25 subdomains at once with the REST API.
This DynDNS updater is inspired by https://github.com/jasontbradshaw/gandi-dyndns which worked very well with the classic DNS from Gandiv4 Website and their XML-RPC API.
Gandi has created a new API, i accidently switched to the new DNS Record System, so someone had to start a new updater.