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use std::{net::SocketAddr, time::Duration}; use metrics_core::Observe; use metrics_runtime::{ exporters::{HttpExporter, LogExporter}, observers::{JsonBuilder, PrometheusBuilder, YamlBuilder}, Receiver, }; use tokio::sync::oneshot; use ckb_async_runtime::{new_runtime, Builder, Handle}; use ckb_metrics_config::{Config, Exporter, Format, Target}; use ckb_stop_handler::{SignalSender, StopHandler}; use ckb_util::strings; #[must_use] pub enum Guard { Off, On { handle: Handle, stop: StopHandler<()>, }, } impl Drop for Guard { fn drop(&mut self) { if let Self::On { ref mut stop, .. } = self { stop.try_send(); } } } pub fn init(config: Config) -> Result<Guard, String> { if config.exporter.is_empty() { return Ok(Guard::Off); } let mut runtime_builder = Builder::new(); runtime_builder .threaded_scheduler() .enable_io() .enable_time(); if config.threads != 0 { runtime_builder.core_threads(config.threads); } else { runtime_builder.core_threads(2); }; let (signal_sender, mut signal_receiver) = oneshot::channel(); let service = move |_: Handle| async move { loop { tokio::select! { _ = &mut signal_receiver => break } } }; let (handle, thread) = new_runtime("Metrics", Some(runtime_builder), service); let receiver = { let histogram_window_secs = if config.histogram_window > 0 { config.histogram_window } else { 10 }; let histogram_granularity_secs = if config.histogram_granularity > 0 { config.histogram_granularity } else { 1 }; let upkeep_interval_millis = if config.upkeep_interval > 0 { config.upkeep_interval } else { 50 }; let histogram_window = Duration::from_secs(histogram_window_secs); let histogram_granularity = Duration::from_secs(histogram_granularity_secs); let upkeep_interval = Duration::from_millis(upkeep_interval_millis); Receiver::builder() .histogram(histogram_window, histogram_granularity) .upkeep_interval(upkeep_interval) } .build() .unwrap(); let controller = receiver.controller(); for (name, exporter) in config.exporter { check_exporter_name(&name)?; run_exporter(exporter, &handle, controller.clone())?; } receiver.install(); let stop = StopHandler::new(SignalSender::Tokio(signal_sender), thread); Ok(Guard::On { handle, stop }) } fn check_exporter_name(name: &str) -> Result<(), String> { strings::check_if_identifier_is_valid(name) } fn run_exporter<C>(exporter: Exporter, handle: &Handle, c: C) -> Result<(), String> where C: Observe + Sync + Send + 'static, { let Exporter { target, format } = exporter; match target { Target::Log { level, interval } => { let lv: log::Level = level.into(); let dur = Duration::from_secs(interval); match format { Format::Json { pretty } => { let b = JsonBuilder::new().set_pretty_json(pretty); let exporter = LogExporter::new(c, b, lv, dur); handle.spawn(async { tokio::spawn(exporter.async_run()); }); } Format::Yaml => { let b = YamlBuilder::new(); let exporter = LogExporter::new(c, b, lv, dur); handle.spawn(async { tokio::spawn(exporter.async_run()); }); } Format::Prometheus => { let b = PrometheusBuilder::new(); let exporter = LogExporter::new(c, b, lv, dur); handle.spawn(async { tokio::spawn(exporter.async_run()); }); } }; } Target::Http { listen_address } => { let addr = listen_address .parse::<SocketAddr>() .map_err(|err| format!("failed to parse listen_address because {}", err))?; match format { Format::Json { pretty } => { let b = JsonBuilder::new().set_pretty_json(pretty); let exporter = HttpExporter::new(c, b, addr); handle.spawn(async { tokio::spawn(exporter.async_run()); }); } Format::Yaml => { let b = YamlBuilder::new(); let exporter = HttpExporter::new(c, b, addr); handle.spawn(async { tokio::spawn(exporter.async_run()); }); } Format::Prometheus => { let b = PrometheusBuilder::new(); let exporter = HttpExporter::new(c, b, addr); handle.spawn(async { tokio::spawn(exporter.async_run()); }); } }; } } Ok(()) }