Gandi Dynamic DNS

Script and Docker container to update the IP address of a gandi.net domain.

• updates every hour (configurable)
• gets external IP address from icanhazip.com
• automatically skips update if external IP has not changed
• only 3.68 MB (compressed)

Usage

Environment Variables

• GANDI_API_KEY: API key from https://account.gandi.net/en/users/<your username>/security
• DOMAIN: domain name registered with gandi.net, for example example.com
• RECORD_NAMES: name of the DNS records to update
  • specify multiple records by providing a comma-delimited list
  • could be the name of the subdomain, for example, foo to update the IP for foo.example.com
  • could be @ to update the IP for the domain itself
• UPDATE_INTERVAL: time interval between updates (optional)
  • defaults to 1h (one hour)
  • must be in the format used by GNU sleep
• TIME_TO_LIVE: DNS TTL, in seconds, for the record (optional)
  • defaults to 3600 (one hour)

Script

export GANDI_API_KEY=12345
export DOMAIN=example.com
export RECORD_NAMES=foo,bar
./gandi-dynamic-dns

Docker Image

One-Off

This will build, run, then remove the image. It should only be used for local testing.

docker run --rm -it -e 'GANDI_API_KEY=12345' -e 'DOMAIN=example.com' -e 'RECORD_NAMES=foo,bar' "$(docker build -q .)"

Docker Compose

version: "3.7"
services:
  gandi-dynamic-dns:
    image: adamvig/gandi-dynamic-dns:latest
    environment:
      - GANDI_API_KEY=12345
      - DOMAIN=example.com
      - RECORD_NAMES=foo,bar