mirror of
https://github.com/LemmyNet/lemmy.git
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1d38aad9d3
* a lot * merge * Fix stuff broken by merge * Get rid of repetitive `&mut *context.conn().await?` * Add blank lines under each line with `conn =` * Fix style mistakes (partial) * Revert "Fix style mistakes (partial)" This reverts commit48a033b87f
. * Revert "Add blank lines under each line with `conn =`" This reverts commit773a6d3beb
. * Revert "Get rid of repetitive `&mut *context.conn().await?`" This reverts commitd2c6263ea1
. * Use DbConn for CaptchaAnswer methods * DbConn trait * Remove more `&mut *` * Fix stuff * Re-run CI * try to make ci start * fix * fix * Fix api_common::utils * Fix apub::activities::block * Fix apub::api::resolve_object * Fix some things * Revert "Fix some things" This reverts commit2bf8574bc8
. * Revert "Fix apub::api::resolve_object" This reverts commit3e4059aabb
. * Revert "Fix apub::activities::block" This reverts commit3b02389abd
. * Revert "Fix api_common::utils" This reverts commit7dc73de613
. * Revert "Revert "Fix api_common::utils"" This reverts commitf740f115e5
. * Revert "Revert "Fix apub::activities::block"" This reverts commit2ee206af7c
. * Revert "Revert "Fix apub::api::resolve_object"" This reverts commit96ed8bf2e9
. * Fix fetch_local_site_data * Fix get_comment_parent_creator * Remove unused perma deleted text * Fix routes::feeds * Fix lib.rs * Update lib.rs * rerun ci * Attempt to create custom GetConn and RunQueryDsl traits * Start over * Add GetConn trait * aaaa * Revert "aaaa" This reverts commitacc9ca1aed
. * Revert "Revert "aaaa"" This reverts commit443a2a00a5
. * still aaaaaaaaaaaaa * Return to earlier thing Revert "Add GetConn trait" This reverts commitab4e94aea5
. * Try to use DbPool enum * Revert "Try to use DbPool enum" This reverts commite4d1712646
. * DbConn and DbPool enums (db_schema only fails to compile for tests) * fmt * Make functions take `&mut DbPool<'_>` and make db_schema tests compile * Add try_join_with_pool macro and run fix-clippy on more crates * Fix some errors * I did it * Remove function variants that take connection * rerun ci * rerun ci * rerun ci
121 lines
3.2 KiB
Rust
121 lines
3.2 KiB
Rust
use actix_web::{rt::System, web, App, HttpResponse, HttpServer, Responder};
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use lemmy_api_common::context::LemmyContext;
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use lemmy_utils::settings::structs::PrometheusConfig;
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use prometheus::{default_registry, Encoder, Gauge, Opts, TextEncoder};
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use std::{
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net::{IpAddr, Ipv4Addr},
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sync::Arc,
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thread,
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};
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struct PromContext {
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lemmy: LemmyContext,
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db_pool_metrics: DbPoolMetrics,
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}
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struct DbPoolMetrics {
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max_size: Gauge,
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size: Gauge,
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available: Gauge,
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}
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static DEFAULT_BIND: IpAddr = IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1));
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static DEFAULT_PORT: i32 = 10002;
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pub fn serve_prometheus(config: Option<&PrometheusConfig>, lemmy_context: LemmyContext) {
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let context = Arc::new(PromContext {
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lemmy: lemmy_context,
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db_pool_metrics: create_db_pool_metrics(),
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});
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let (bind, port) = match config {
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Some(config) => (
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config.bind.unwrap_or(DEFAULT_BIND),
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config.port.unwrap_or(DEFAULT_PORT),
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),
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None => (DEFAULT_BIND, DEFAULT_PORT),
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};
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// spawn thread that blocks on handling requests
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// only mapping /metrics to a handler
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thread::spawn(move || {
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let sys = System::new();
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sys.block_on(async {
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let server = HttpServer::new(move || {
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App::new()
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.app_data(web::Data::new(Arc::clone(&context)))
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.route("/metrics", web::get().to(metrics))
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})
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.bind((bind, port as u16))
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.unwrap_or_else(|_| panic!("Cannot bind to {}:{}", bind, port))
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.run();
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if let Err(err) = server.await {
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eprintln!("Prometheus server error: {}", err);
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}
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})
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});
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}
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// handler for the /metrics path
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async fn metrics(context: web::Data<Arc<PromContext>>) -> impl Responder {
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// collect metrics
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collect_db_pool_metrics(&context).await;
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let mut buffer = Vec::new();
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let encoder = TextEncoder::new();
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// gather metrics from registry and encode in prometheus format
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let metric_families = prometheus::gather();
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encoder.encode(&metric_families, &mut buffer).unwrap();
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let output = String::from_utf8(buffer).unwrap();
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HttpResponse::Ok().body(output)
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}
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// create lemmy_db_pool_* metrics and register them with the default registry
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fn create_db_pool_metrics() -> DbPoolMetrics {
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let metrics = DbPoolMetrics {
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max_size: Gauge::with_opts(Opts::new(
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"lemmy_db_pool_max_connections",
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"Maximum number of connections in the pool",
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))
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.unwrap(),
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size: Gauge::with_opts(Opts::new(
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"lemmy_db_pool_connections",
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"Current number of connections in the pool",
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))
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.unwrap(),
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available: Gauge::with_opts(Opts::new(
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"lemmy_db_pool_available_connections",
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"Number of available connections in the pool",
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))
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.unwrap(),
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};
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default_registry()
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.register(Box::new(metrics.max_size.clone()))
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.unwrap();
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default_registry()
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.register(Box::new(metrics.size.clone()))
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.unwrap();
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default_registry()
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.register(Box::new(metrics.available.clone()))
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.unwrap();
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metrics
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}
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async fn collect_db_pool_metrics(context: &PromContext) {
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let pool_status = context.lemmy.inner_pool().status();
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context
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.db_pool_metrics
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.max_size
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.set(pool_status.max_size as f64);
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context.db_pool_metrics.size.set(pool_status.size as f64);
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context
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.db_pool_metrics
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.available
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.set(pool_status.available as f64);
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}
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