DNS updater for Njalla

This is a small Njalla DNS updater. It will grab the current external IP address and will update the defined DNS entries with that IP address.

Build for Docker

sudo docker buildx build --platform linux/arm64/v8 -t name/image:tag  --push .

Environment Variables

You need to define 2 environment variables inside of your container:

$njalla_update

Defines a json formatted list of subdomains that you want to automatically update.

json structure:

{
  "update": [
    {
      "sub": "subdomain",
      "domain": "domain"
    }
  ]
}

Example with two DNS records to update

export njalla_update = '{"update": [{"sub": "subdomain1", "domain": "domain"}, {"sub": "subdomain2", "domain": "domain"}]}'

$njalla_update_interval

Defines the update interval in seconds.

Example that will trigger the update all 10mins

export njalla_update_interval = "600" 

API Token

The API token is expected to be a file inside the container. It should only contain the API key. Expected path: /vault/secret/api.txt

Example

$cat /vault/secrets/api.txt
1234567890topsecure