wg show <interface> if specified in the command line (#17)
Using `interface` instead of `all` if specified
This commit is contained in:
Francesco Cogno
GitHub
parent
42ae2f5927
commit
e04a3f833b
4 changed files with 107 additions and 36 deletions
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@ -1,6 +1,6 @@
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[package]
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name = "prometheus_wireguard_exporter"
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version = "3.1.1"
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version = "3.2.0"
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authors = ["Francesco Cogno <francesco.cogno@outlook.com>"]
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description = "Prometheus WireGuard Exporter"
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edition = "2018"
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@ -4,15 +4,15 @@
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[](https://crates.io/crates/prometheus_wireguard_exporter) [](https://crates.io/crates/prometheus_wireguard_exporter) [](https://crates.io/crates/prometheus_wireguard_exporter)
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[](https://github.com/MindFlavor/prometheus_wireguard_exporter/tree/3.1.1)
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[](https://github.com/MindFlavor/prometheus_wireguard_exporter/tree/3.1.1)
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[](https://github.com/MindFlavor/prometheus_wireguard_exporter/tree/3.2.0)
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[](https://github.com/MindFlavor/prometheus_wireguard_exporter/tree/3.2.0)
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[](https://travis-ci.org/MindFlavor/prometheus_wireguard_exporter)
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[](https://img.shields.io/github/commits-since/mindflavor/prometheus_wireguard_exporter/3.1.1.svg)
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[](https://img.shields.io/github/commits-since/mindflavor/prometheus_wireguard_exporter/3.2.0.svg)
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## Intro
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A Prometheus exporter for [WireGuard](https://www.wireguard.com), written in Rust. This tool exports the `wg show all dump` 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.
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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.
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Starting from release [2.0.2](https://github.com/MindFlavor/prometheus_wireguard_exporter/releases/tag/2.0.2) this exporter supports IPv6 addressess too (thanks to [Maximilian Bosch](https://github.com/Ma27)'s PR [#5](https://github.com/MindFlavor/prometheus_wireguard_exporter/pull/5)).
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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 [https://github.com/MindFlavor/prometheus_wireguard_exporter/issues/8](https://github.com/MindFlavor/prometheus_wireguard_exporter/issues/8)).
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91
src/main.rs
91
src/main.rs
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@ -5,7 +5,7 @@ use clap;
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use clap::{crate_authors, crate_name, crate_version, Arg};
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use futures::future::{done, ok, Either, Future};
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use hyper::{Body, Request, Response};
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use log::{info, trace};
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use log::{debug, info, trace};
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use std::env;
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mod options;
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use options::Options;
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@ -25,14 +25,13 @@ use std::sync::Arc;
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fn wg_with_text(
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wg_config_str: &str,
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wg_output: ::std::process::Output,
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wg_output_str: &str,
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options: Arc<Options>,
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) -> Result<Response<Body>, ExporterError> {
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let pehm = peer_entry_hashmap_try_from(wg_config_str)?;
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trace!("pehm == {:?}", pehm);
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let wg_output_string = String::from_utf8(wg_output.stdout)?;
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let wg = WireGuard::try_from(&wg_output_string as &str)?;
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let wg = WireGuard::try_from(wg_output_str)?;
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Ok(Response::new(Body::from(wg.render_with_names(
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Some(&pehm),
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options.separate_allowed_ips,
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@ -45,45 +44,75 @@ fn perform_request(
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options: &Arc<Options>,
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) -> impl Future<Item = Response<Body>, Error = failure::Error> {
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trace!("perform_request");
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// this is needed to satisfy the borrow checker
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let options = options.clone();
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debug!("options == {:?}", options);
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//let interface = options.get_interface();
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let interface_str = match options.get_interface() {
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Some(interface_str) => interface_str,
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None => "all",
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}
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.to_owned();
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debug!("using inteface_str {}", interface_str);
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done(
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Command::new("wg")
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.arg("show")
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.arg("all")
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.arg(&interface_str)
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.arg("dump")
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.output(),
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)
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.from_err()
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.and_then(move |output| {
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if let Some(extract_names_config_file) = &options.extract_names_config_file {
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Either::A(
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done(::std::fs::read_to_string(extract_names_config_file))
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.from_err()
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.and_then(|wg_config_string| {
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wg_with_text(&wg_config_string as &str, output, options)
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}),
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)
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} else {
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Either::B(done(String::from_utf8(output.stdout)).from_err().and_then(
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move |output_str| {
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trace!("{}", output_str);
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done(WireGuard::try_from(&output_str as &str))
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.from_err()
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.and_then(move |wg| {
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ok(Response::new(Body::from(wg.render_with_names(
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None,
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options.separate_allowed_ips,
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options.export_remote_ip_and_port,
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))))
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})
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},
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))
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}
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done(String::from_utf8(output.stdout))
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.from_err()
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.and_then(move |output_str| {
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trace!("wg show output == {}", output_str);
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// the output of wg show is different if we use all or we specify an interface.
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// In the first case the first column will be the interface name. In the second case
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// the interface name will be omitted. We need to compensate for the skew somehow (one
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// column less in the second case). We solve this prepending the interface name in every
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// line so the output of the second case will be equal to the first case.
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let output_str = if interface_str != "all" {
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debug!("injecting {} to the wg show output", interface_str);
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let mut result = String::new();
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for s in output_str.lines() {
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result.push_str(&format!("{}\t{}\n", interface_str, s));
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}
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result
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} else {
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output_str
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};
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if let Some(extract_names_config_file) = &options.extract_names_config_file {
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Either::A(
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done(::std::fs::read_to_string(extract_names_config_file))
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.from_err()
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.and_then(move |wg_config_string| {
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wg_with_text(&wg_config_string as &str, &output_str, options)
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}),
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)
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} else {
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Either::B({
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trace!("{}", output_str);
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done(WireGuard::try_from(&output_str as &str))
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.from_err()
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.and_then(move |wg| {
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ok(Response::new(Body::from(wg.render_with_names(
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None,
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options.separate_allowed_ips,
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options.export_remote_ip_and_port,
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))))
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})
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})
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}
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})
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.from_err()
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})
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.from_err()
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}
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fn main() {
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@ -24,4 +24,46 @@ impl Options {
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}
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}
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}
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pub fn get_interface(&self) -> Option<&str> {
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if let Some(config_file) = &self.extract_names_config_file {
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let path = std::path::Path::new(config_file);
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if let Some(file_stem) = path.file_stem() {
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file_stem.to_str()
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} else {
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None
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}
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} else {
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None
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_interface_some() {
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let options = Options {
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verbose: true,
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separate_allowed_ips: false,
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extract_names_config_file: Some("/etc/wireguard/wg0.conf".to_owned()),
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export_remote_ip_and_port: true,
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};
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assert_eq!(options.get_interface(), Some("wg0"));
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}
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#[test]
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fn test_interface_none() {
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let options = Options {
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verbose: true,
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separate_allowed_ips: false,
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extract_names_config_file: None,
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export_remote_ip_and_port: true,
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};
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assert_eq!(options.get_interface(), None);
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}
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}
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