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Add validator mode for NixOS Exporter

This commit is contained in:
clerie 2023-01-04 01:10:30 +01:00
parent acdb459d3a
commit e7f51b8855
3 changed files with 671 additions and 19 deletions

550
Cargo.lock generated
View File

@ -69,30 +69,97 @@ dependencies = [
"tower-service",
]
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@ -117,6 +184,12 @@ version = "0.3.25"
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@ -135,6 +208,31 @@ dependencies = [
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@ -194,6 +292,7 @@ dependencies = [
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@ -207,12 +306,75 @@ dependencies = [
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@ -265,7 +427,25 @@ dependencies = [
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@ -273,6 +453,8 @@ name = "nixos-exporter"
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@ -312,7 +539,7 @@ dependencies = [
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"smallvec",
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@ -353,6 +580,12 @@ version = "0.1.0"
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@ -380,6 +613,52 @@ dependencies = [
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@ -392,12 +671,45 @@ version = "1.0.12"
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@ -445,6 +757,15 @@ dependencies = [
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@ -495,7 +845,7 @@ dependencies = [
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@ -509,6 +859,30 @@ dependencies = [
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name = "windows-sys"
version = "0.42.0"
@ -634,12 +1129,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
dependencies = [
"windows_aarch64_gnullvm",
"windows_aarch64_msvc",
"windows_i686_gnu",
"windows_i686_msvc",
"windows_x86_64_gnu",
"windows_aarch64_msvc 0.42.0",
"windows_i686_gnu 0.42.0",
"windows_i686_msvc 0.42.0",
"windows_x86_64_gnu 0.42.0",
"windows_x86_64_gnullvm",
"windows_x86_64_msvc",
"windows_x86_64_msvc 0.42.0",
]
[[package]]
@ -648,24 +1143,48 @@ version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "41d2aa71f6f0cbe00ae5167d90ef3cfe66527d6f613ca78ac8024c3ccab9a19e"
[[package]]
name = "windows_aarch64_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9bb8c3fd39ade2d67e9874ac4f3db21f0d710bee00fe7cab16949ec184eeaa47"
[[package]]
name = "windows_aarch64_msvc"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dd0f252f5a35cac83d6311b2e795981f5ee6e67eb1f9a7f64eb4500fbc4dcdb4"
[[package]]
name = "windows_i686_gnu"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "180e6ccf01daf4c426b846dfc66db1fc518f074baa793aa7d9b9aaeffad6a3b6"
[[package]]
name = "windows_i686_gnu"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fbeae19f6716841636c28d695375df17562ca208b2b7d0dc47635a50ae6c5de7"
[[package]]
name = "windows_i686_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e2e7917148b2812d1eeafaeb22a97e4813dfa60a3f8f78ebe204bcc88f12f024"
[[package]]
name = "windows_i686_msvc"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "84c12f65daa39dd2babe6e442988fc329d6243fdce47d7d2d155b8d874862246"
[[package]]
name = "windows_x86_64_gnu"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4dcd171b8776c41b97521e5da127a2d86ad280114807d0b2ab1e462bc764d9e1"
[[package]]
name = "windows_x86_64_gnu"
version = "0.42.0"
@ -678,8 +1197,23 @@ version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "09d525d2ba30eeb3297665bd434a54297e4170c7f1a44cad4ef58095b4cd2028"
[[package]]
name = "windows_x86_64_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
[[package]]
name = "windows_x86_64_msvc"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f40009d85759725a34da6d89a94e63d7bdc50a862acf0dbc7c8e488f1edcb6f5"
[[package]]
name = "winreg"
version = "0.10.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "80d0f4e272c85def139476380b12f9ac60926689dd2e01d4923222f40580869d"
dependencies = [
"winapi",
]

View File

@ -5,4 +5,6 @@ edition = "2021"
[dependencies]
axum = "0.6.1"
reqwest = { version = "0.11.13", features = ["json"] }
serde_json = "1.0.91"
tokio = { version = "1.23.0", features = ["full"] }

View File

@ -1,16 +1,35 @@
use axum::{
extract::Query,
http::StatusCode,
response::{IntoResponse, Response},
routing::get,
Router,
};
use std::collections::HashMap;
use std::net::SocketAddr;
use std::str::FromStr;
#[derive(PartialEq)]
enum OperationMode {
Exporter,
Validator,
}
fn parse_nix_store_path(path: std::path::PathBuf) -> Result<(String, String), String> {
let (hash, name) = path.file_name()
.ok_or_else(String::default)?
.to_str()
.ok_or_else(String::default)?
.split_once("-")
.ok_or_else(String::default)?;
return Ok((hash.to_string(), name.to_string()));
}
#[tokio::main]
async fn main() {
let mut listen = String::from("[::]:9152");
let mut operationmode = OperationMode::Exporter;
let mut args = std::env::args();
args.next();
loop {
@ -30,6 +49,12 @@ async fn main() {
"--listen" => {
listen = args.next().unwrap();
}
"exporter" => {
operationmode = OperationMode::Exporter;
}
"validator" => {
operationmode = OperationMode::Validator;
}
unknown => {
println!("unknown option: {}", unknown);
std::process::exit(1)
@ -37,7 +62,14 @@ async fn main() {
}
}
let app = Router::new().route("/metrics", get(metrics));
let mut app = Router::new();
if operationmode == OperationMode::Exporter {
println!("Running NixOS Exporter in Exporter mode");
app = app.route("/metrics", get(metrics));
} else if operationmode == OperationMode::Validator {
println!("Running NixOS Exporter in Validator mode");
app = app.route("/metrics", get(check));
}
let addr = SocketAddr::from_str(&listen).unwrap();
println!("listening on http://{}", addr);
@ -53,13 +85,7 @@ fn get_current_system() -> Result<(String, String), String> {
Err(err) => return Err(err.to_string()),
};
let (hash, name) = symlink
.file_name()
.ok_or_else(String::default)?
.to_str()
.ok_or_else(String::default)?
.split_once("-")
.ok_or_else(String::default)?;
let (hash, name) = parse_nix_store_path(symlink)?;
Ok((String::from(hash), String::from(name)))
}
@ -75,7 +101,97 @@ async fn metrics() -> Response {
};
(
StatusCode::OK,
format!("nixos_current_system_hash{{hash=\"{}\"}} 1\nnixos_current_system_name{{name=\"{}\"}} 1\n", hash, name)
).into_response()
StatusCode::OK,
format!("nixos_current_system_hash{{hash=\"{}\"}} 1\nnixos_current_system_name{{name=\"{}\"}} 1\n", hash, name)
).into_response()
}
async fn check(Query(params): Query<HashMap<String, String>>) -> Response {
let target = match params.get("target") {
Some(target) => target,
None => {
return (StatusCode::NOT_FOUND, "specify target").into_response();
},
};
let client = reqwest::Client::new();
let prometheus_req = match client.get(format!("https://prometheus.monitoring.clerie.de/api/v1/query?query=nixos_nixos_current_system_hash{{job=%22nixos-exporter%22,instance=%22{}.mon.clerie.de:9152%22}}", target))
.header("Accept", "application/json")
.send().await {
Ok(req) => req,
Err(_) => {
return (StatusCode::INTERNAL_SERVER_ERROR, "Promehteus can't get reached").into_response();
},
};
match prometheus_req.status() {
reqwest::StatusCode::OK => (),
_ => {
return (StatusCode::NOT_FOUND, "Target does not exist in Hydra").into_response();
},
}
let prometheus_body = match prometheus_req.json::<serde_json::Value>().await {
Ok(body) => body,
Err(_) => {
return (StatusCode::INTERNAL_SERVER_ERROR, "Invalid response from Hydra").into_response();
},
};
let current_system_hash = match prometheus_body["data"]["result"][0]["metric"]["hash"].as_str() {
Some(nix_store_path) => nix_store_path,
_ => {
return (StatusCode::INTERNAL_SERVER_ERROR, "No buildoutput found in Hydra").into_response();
},
};
let hydra_req = match client.get(format!("https://hydra.clerie.de/job/nixfiles/nixfiles/nixosConfigurations.{}/latest", target))
.header("Accept", "application/json")
.send().await {
Ok(req) => req,
Err(_) => {
return (StatusCode::INTERNAL_SERVER_ERROR, "Hydra can't get reached").into_response();
},
};
match hydra_req.status() {
reqwest::StatusCode::OK => (),
_ => {
return (StatusCode::NOT_FOUND, "Target does not exist in Hydra").into_response();
},
}
let hydra_body = match hydra_req.json::<serde_json::Value>().await {
Ok(body) => body,
Err(_) => {
return (StatusCode::INTERNAL_SERVER_ERROR, "Invalid response from Hydra").into_response();
},
};
let nix_store_path = match hydra_body["buildoutputs"]["out"]["path"].as_str() {
Some(nix_store_path) => nix_store_path,
_ => {
return (StatusCode::INTERNAL_SERVER_ERROR, "No buildoutput found in Hydra").into_response();
},
};
let (hydra_system_hash, _) = match parse_nix_store_path(std::path::PathBuf::from(nix_store_path)) {
Ok((hash, name)) => (hash, name),
Err(_) => {
return (StatusCode::INTERNAL_SERVER_ERROR, "Invalid store path returned by Hydra").into_response();
},
};
let mut status = "0";
if current_system_hash == hydra_system_hash {
status = "1";
}
return (
StatusCode::OK,
format!("nixos_current_system_valid{{target=\"{}.net.clerie.de:9152\"}} {}\n", target, status)
).into_response();
}