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external-dns-routeros-provider
<p align="center"> <em>A RouterOS provider for external-dns</em> </p>This repo provides an external-dns webhook provider capable of integrating with devices running Mikrotik's RouterOS.
Usage
The docker image can be pulled from docker.io/benfiola/external-dns-routeros-provider:latest.
This webhook server is intended to be run as a sidecar alongside external-dns - such that the webhook is connectable via localhost:8888. An example deployment can be found here.
Configuration
Configuring the webhook can be done via the environment or via CLI arguments.
| CLI | Environment Variable | Description |
|---|---|---|
| --filter-exclude | EXTERNAL_DNS_ROUTEROS_PROVIDER_FILTER_EXCLUDE | (Optional) domain name to exclude from webhook processing - can be used multiple times |
| --filter-include | EXTERNAL_DNS_ROUTEROS_PROVIDER_FILTER_INCLUDE | (Optional) domain name to include in webhook processing - can be used multiple times |
| --filter-regex-exclude | EXTERNAL_DNS_ROUTEROS_PROVIDER_FILTER_REGEX_EXCLUDE | (Optional) domain name regex to exclude from webhook processing |
| --filter-regex-include | EXTERNAL_DNS_ROUTEROS_PROVIDER_FILTER_REGEX_INCLUDE | (Optional) domain name regex to include in webhook processing |
| --log-level | EXTERNAL_DNS_ROUTEROS_PROVIDER_LOG_LEVEL | (Optional) log level (error, warning, info, debug), default: info |
| --routeros-address | EXTERNAL_DNS_ROUTEROS_PROVIDER_ROUTEROS_ADDRESS | routeros device <host>:<port> |
| --routeros-password | EXTERNAL_DNS_ROUTEROS_PROVIDER_ROUTEROS_PASSWORD | routeros password |
| --routeros-username | EXTERNAL_DNS_ROUTEROS_PROVIDER_ROUTEROS_USERNAME | routeros username |
| --server-host | EXTERNAL_DNS_ROUTEROS_PROVIDER_SERVER_HOST | (Optional) server host to listen on, default: 127.0.0.1 |
| --server-port | EXTERNAL_DNS_ROUTEROS_PROVIDER_SERVER_PORT | (Optional) server port to listen on, default: 8888 |
Development
I personally use vscode as an IDE. For a consistent development experience, this project is also configured to utilize devcontainers. If you're using both - and you have the Dev Containers extension installed - you can follow the introductory docs to quickly get started.
NOTE: Helper scripts are written under the assumption that they're being executed within a dev container.
Creating a dev environment
From the project root, run the following to create a development cluster to test the webhook with:
cd /workspaces/external-dns-routeros-provider
./dev/create.sh
This will:
- Delete an existing dev cluster if one exists
- Create a new dev cluster
- Delete an existing routeros container if one exists
- Create a new routeros container
- Deploys external-dns CRDs
- Deploys a set of test DNS records
Re-running this script will re-create all of the above.
Creating a launch script
Copy the ./dev/dev.go.template script to ./dev/dev.go, then run it to start both the external-dns controller and this provider. ./dev/dev.go is ignored by git and can be modified as needed to help facilitate local development.
Additionally, the devcontainer is configured with a vscode launch configuration that points to ./dev/dev.go. You should be able to launch (and attach a debugger to) the webhook via this vscode launch configuration.