Disclaimer
This project showcases Kotlin's multiplatform capabilities for command line applications. It is built with Kotlin/Native for linuxX64 and macosX64 as well as for the JVM
Note: Right now, the native binaries are relying on the -native-mt branch of coroutines and are therefore leaking memory

The service binary is looking for a configuraiton file in ~/.ionos-dyndns/config.json

Sample:

{
  "ipRefreshInterval": "1m",
  "domains": [
    {
      "apiKey": "someApiKeyThatIProbablyWontPushIntoAnyRepo",
      "rootDomainName": "sellmair.io",
      "targetDomainName": "sellmair.io",
      "timeToLive": "5m",
      "ipProvider": "amazon"
    }, 
    {
      "apiKey": "someApiKeyThatIProbablyWontPushIntoAnyRepo",
      "rootDomainName": "sellmair.io",
      "targetDomainName": "subdomain.sellmair.io",
      "timeToLive": "5m",
      "ipProvider": "amazon"
    }, 
    {
      "apiKey": "someApiKeyThatIProbablyWontPushIntoAnyRepo",
      "rootDomainName": "sellmair.io",
      "targetDomainName": "anotherdomain.sellmair.io",
      "timeToLive": "5m",
      "ipProvider": "amazon"
    }
  ]
}

Time between the application shall re-check if the external current IP address changed

• 1m: Check current IP address every minutes
• 1.5h: Check current IP address every 1.5 hours
• 0.33d: Check current IP address 3 times a day

List of domains to update

The ionos api key (see: https://developer.hosting.ionos.de/docs/getstarted#support) associated with the domain

The name of the domain that you want to update (without subdomain)

The name of the domain (with or without subdomain) that should be udpated

Corresponds to the "ttl" of the dns record

• 1m: Records can be cached for one minute
• 1.5h: Records can be cached for 1 hour 30 minutes
• ...

The preffered method of querying the current external IP address.

• "amazon" Uses "https://checkip.amazonaws.com/" to find IP
• "url:https://my.ip-service.com" will use specified URL to qury IP address