https://github.com/madjam002/tailscale-prometheus-sd

Prometheus Service Discovery for Tailscale which automatically discovers exporters running on nodes within your Tailscale Network (tailnet). Also works with Headscale.
https://github.com/madjam002/tailscale-prometheus-sd

headscale prometheus prometheus-service-discovery tailscale

Last synced: 8 days ago
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Prometheus Service Discovery for Tailscale which automatically discovers exporters running on nodes within your Tailscale Network (tailnet). Also works with Headscale.

• Host: GitHub
• URL: https://github.com/madjam002/tailscale-prometheus-sd
• Owner: madjam002
• License: mit
• Created: 2022-12-09T16:12:48.000Z (almost 2 years ago)
• Default Branch: master
• Last Pushed: 2024-02-26T15:27:05.000Z (9 months ago)
• Last Synced: 2024-08-02T15:54:38.776Z (3 months ago)
• Topics: headscale, prometheus, prometheus-service-discovery, tailscale
• Language: Nix
• Homepage:
• Size: 1.22 MB
• Stars: 14
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# tailscale-prometheus-sd

Prometheus Service Discovery for Tailscale which automatically discovers exporters running on nodes within your Tailscale Network (tailnet).

Unlike alternatives in this space, tailscale-prometheus-sd uses the local Tailscale API and Tailscale Service Collection (https://tailscale.com/kb/1100/services/) to discover exporters running across your network.

As it uses the Tailscale localapi, it also works with [Headscale](https://github.com/juanfont/headscale) with a small patch needed to enable service collection:

```

diff --git a/api_common.go b/api_common.go

--- a/api_common.go

+++ b/api_common.go

@@ -63,8 +63,9 @@

 		Domain:       h.cfg.BaseDomain,

 		PacketFilter: h.aclRules,

 		DERPMap:      h.DERPMap,

 		UserProfiles: profiles,

+		CollectServices: "true",

 		Debug: &tailcfg.Debug{

 			DisableLogTail:      !h.cfg.LogTail.Enabled,

 			RandomizeClientPort: h.cfg.RandomizeClientPort,

 		},

```

## Usage

tailscale-prometheus-sd is currently packaged via Nix.

Run with `TAILSCALE_PROMETHEUS_SD_CONFIG=path/to/config.json PROMETHEUS_TARGETS_OUT=path/to/targets.json nix run madjam002/tailscale-prometheus-sd`.

Example config.json:

```

{

  "matchers": [

    { "description": "node-exporter" }, // match services collected by description (Tailscale infers this from the process name automatically)

    { "port": 9100 } // match services collected by the port that the service is listening on (9100 is typically used for node-exporter)

  ]

}

```

Services that are matched using `matchers` in the config.json will be written to the Prometheus service discovery file.

## Developing

Make sure Nix is installed, and preferably direnv, otherwise run `nix develop` in this repo to start a development shell.

Then run `TAILSCALE_PROMETHEUS_SD_CONFIG=./config.example.json PROMETHEUS_TARGETS_OUT=./targets.example.json yarn node -r esbuild-register .`

## License

Licensed under the MIT License.

View the full license [here](/LICENSE).