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|
use std::env;
use std::error::Error;
use std::net::SocketAddr;
use std::sync::Arc;
use http::StatusCode;
use http_body_util::Full;
use hyper::body::Bytes;
use hyper::server::conn::http1;
use hyper::service::service_fn;
use hyper::{Request, Response};
use hyper_util::rt::TokioIo;
use tokio::net::TcpListener;
use tracing::{error, info, warn};
use tickborg::easyamqp::{ChannelExt, ConsumerExt};
use tickborg::{config, easyamqp, easylapin, stats, tasks};
fn response(body: String) -> Response<Full<Bytes>> {
Response::builder()
.status(StatusCode::OK)
.body(Full::new(Bytes::from(body)))
.unwrap()
}
async fn run_http_server(
addr: SocketAddr,
metrics: Arc<stats::MetricCollector>,
) -> Result<(), Box<dyn Error + Send + Sync>> {
let listener = TcpListener::bind(addr).await?;
info!("HTTP server listening on {}", addr);
loop {
let (stream, _) = listener.accept().await?;
let io = TokioIo::new(stream);
let metrics = metrics.clone();
tokio::task::spawn(async move {
let service = service_fn(move |_req: Request<hyper::body::Incoming>| {
let metrics = metrics.clone();
async move { Ok::<_, hyper::Error>(response(metrics.prometheus_output())) }
});
if let Err(err) = http1::Builder::new().serve_connection(io, service).await {
warn!("Error serving connection: {:?}", err);
}
});
}
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
tickborg::setup_log();
let arg = env::args()
.nth(1)
.unwrap_or_else(|| panic!("usage: {} <config>", std::env::args().next().unwrap()));
let cfg = config::load(arg.as_ref());
let Some(stats_cfg) = config::load(arg.as_ref()).stats else {
error!("No stats configuration found!");
panic!();
};
let conn = easylapin::from_config(&stats_cfg.rabbitmq).await?;
let mut chan = conn.create_channel().await?;
let events = stats::RabbitMq::from_lapin(&cfg.whoami(), conn.create_channel().await?);
let metrics = Arc::new(stats::MetricCollector::new());
let collector = tasks::statscollector::StatCollectorWorker::new(events, (*metrics).clone());
chan.declare_exchange(easyamqp::ExchangeConfig {
exchange: "stats".to_owned(),
exchange_type: easyamqp::ExchangeType::Fanout,
passive: false,
durable: true,
auto_delete: false,
no_wait: false,
internal: false,
})
.await?;
let queue_name = String::from("stats-events");
chan.declare_queue(easyamqp::QueueConfig {
queue: queue_name.clone(),
passive: false,
durable: true,
exclusive: false,
auto_delete: false,
no_wait: false,
})
.await?;
chan.bind_queue(easyamqp::BindQueueConfig {
queue: queue_name.clone(),
exchange: "stats".to_owned(),
routing_key: None,
no_wait: false,
})
.await?;
let handle = chan
.consume(
collector,
easyamqp::ConsumeConfig {
queue: "stats-events".to_owned(),
consumer_tag: format!("{}-prometheus-stats-collector", cfg.whoami()),
no_local: false,
no_ack: false,
no_wait: false,
exclusive: false,
},
)
.await?;
// Spawn HTTP server in a separate thread with its own tokio runtime
let metrics_clone = metrics.clone();
std::thread::spawn(async move || {
let addr: SocketAddr = "0.0.0.0:9898".parse().unwrap();
if let Err(e) = run_http_server(addr, metrics_clone).await {
error!("HTTP server error: {:?}", e);
}
});
info!("Fetching jobs from {}", &queue_name);
handle.await;
drop(conn); // Close connection.
info!("Closed the session... EOF");
Ok(())
}
|
