A Prometheus exporter for [WireGuard](https://www.wireguard.com), written in Rust. This tool exports the `wg show all dump` (or `wg show <interface> dump` if you specify a config file) results in a format that [Prometheus](https://prometheus.io/) can understand. The exporter is very light on your server resources, both in terms of memory and CPU usage.
* From release [3.4.1](https://github.com/MindFlavor/prometheus_wireguard_exporter/releases/tag/3.4.0) the exporter supports prepending `sudo` to the `wg` command. This allows to run the exporter as a non root user (although sudoer without password). Thanks to [Jonas Seydel](https://github.com/Thor77) for the idea.
* **BREAKING** From release [3.4.0](https://github.com/MindFlavor/prometheus_wireguard_exporter/releases/tag/3.4.0) the exporter requires you to specify the friendly names in a specific format (only if you want to use them of course). This allows you to use arbitrary comments in the file while keeping the friendly name functionality. Thank you [Miloš Bunčić](https://github.com/psyhomb) for this. This also paves the way for future metadata. In order to migrate you can use this sed command: `sed -i 's/#/# friendly_name=/' peers.conf`. Please make sure to do a backup before using it!
* From release [3.3.1](https://github.com/MindFlavor/prometheus_wireguard_exporter/releases/tag/3.3.1) the exporter accepts multiple interfaces in the command line options. Just pass the `-i` parameter multiple times. Note the not specifying the interface is equivalent to specifying every one of them (the exporter will pass the `all` parameter to `wg show` command).
* **BREAKING** Starting from release [3.3.0](https://github.com/MindFlavor/prometheus_wireguard_exporter/releases/tag/3.3.0) the exporter allows you to specify a different interface from the file name. Previously if you specified the file name (the `-n` flag) the program would infer the interface name from the file name. Now the two items are decoupled: you need to specify the file name (with `-n`) and the interface name (with `-i`) separately. Thank you [Vincent Debergue](https://github.com/vdebergue) for helping with this (see issue [#22](https://github.com/MindFlavor/prometheus_wireguard_exporter/issues/22)). Upgrading from [3.2.4](https://github.com/MindFlavor/prometheus_wireguard_exporter/releases/tag/3.2.4): Please note that the `-n` flag no longer infer automatically the interface name from the file name. We now have the `-i` parameter for that. In order to keep the previous behaviour (if you use the `-n` flag) please add the `-i` flag to the command line arguments as well. For example, if you had `prometheus_wireguard_exporter -n /etc/wireguard/wg0.conf` you must specify `prometheus_wireguard_exporter -n /etc/wireguard/wg0.conf -i wg0` to keep the same behaviour.
* From release [3.0.0](https://github.com/MindFlavor/prometheus_wireguard_exporter/releases/tag/3.0.0) the exporter allows two label modes: one is to dump every allowed ip in a single label (called `allowed_ips`) along with their subnets. The second one is to create a pair of labels for each allowed ip/subnet pair (called `allowed_ip_0`/`allowed_subnet_0`, `allowed_ip_1`/`allowed_subnet_1` and so on for every allowed ip). The default if the single label mode but you can enable the second mode by specifying the `-s` switch at startup. Thank you [Toon Schoenmakers](https://github.com/schoentoon) for this solution (see issue [#8](https://github.com/MindFlavor/prometheus_wireguard_exporter/issues/8)).
* Starting from release [2.0.2](https://github.com/MindFlavor/prometheus_wireguard_exporter/releases/tag/2.0.2) this exporter supports IPv6 addresses too (thanks to [Maximilian Bosch](https://github.com/Ma27)'s PR [#5](https://github.com/MindFlavor/prometheus_wireguard_exporter/pull/5)).
* You need [Rust](https://www.rust-lang.org/) to compile this code. Simply follow the instructions on Rust's website to install the toolchain. If you get weird errors while compiling please try and update your Rust version first (I have developed it on `rustc 1.42.0 (b8cedc004 2020-03-09)`). Alternatively you can build the docker image or use the prebuilt one.
* You need [WireGuard](https://www.wireguard.com) *and* the `wg` CLI in the path. The tool will call `wg show <interface(s)>|all dump` and of course will fail if the `wg` executable is not found. If you want I can add the option of specifying the `wg` path in the command line, just open an issue for it.
| `-l` | no | any valid ip address | 0.0.0.0 | No | Specify the service address. This is the address your Prometheus instance should point to.
| `-p` | no | any valid port number | 9586 | No | Specify the service port. This is the port your Prometheus instance should point to.
| `-n` | no | path to the wireguard configuration file | | No | This flag adds the *friendly_name* attribute to the exported entries. See [Friendly names](#friendly-names) for more details.
| `-s` | no | <switch> | off | No | Enable the allowed ip + subnet split mode for the labels.
| `-r` | no | <switch> | off | No | Exports peer's remote ip and port as labels (if available).
| `-i` | no | your interface name(s) | `all` | Yes | Specifies the interface(s) passed to the `wg show <interface> dump` parameter. Multiple parameters are allowed.
Once started, the tool will listen on the specified port (or the default one, 9586, if not specified) and return a Prometheus valid response at the url `/metrics`. So to check if the tool is working properly simply browse the `http://localhost:9586/metrics` (or whichever port you choose).
Starting from version 1.2 you can instruct the exporter to append a *friendly name* to the exported entries. This can make the output more understandable than using the public keys. For example this is the standard output:
In order for this to work, you need to add the `friendly_name` key value to the comments preceding a peer a specific metadata (in your wireguard configuration file). See below the `[Peer]` definition for an example.
The tag is called `friendly_name` and it will be added to the entry exported to Prometheus. Note that this is not a standard but, since it's a comment, will not interfere with WireGuard in any way. For example this is how you edit your WireGuard configuration file:
Now add the exporter to the Prometheus exporters as usual. I recommend to start it as a service. It's necessary to run it as root (if there is a non-root way to call `wg show all dump` please let me know). My systemd service file is like this one:
