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Code Issues Releases Wiki Activity

Add Prometheus metrics to measure task queue latency

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This commit is contained in:
Takahiro Ebato 2024-12-20 22:46:16 +09:00
parent b18cd9075d
commit 47827ca5c1
2 changed files with 33 additions and 11 deletions
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9
crates/meilisearch/src/metrics.rs
View File

@ -1,7 +1,7 @@
use lazy_static::lazy_static;
use prometheus::{
opts, register_histogram_vec, register_int_counter_vec, register_int_gauge,
register_int_gauge_vec, HistogramVec, IntCounterVec, IntGauge, IntGaugeVec,
opts, register_gauge, register_histogram_vec, register_int_counter_vec, register_int_gauge,
register_int_gauge_vec, Gauge, HistogramVec, IntCounterVec, IntGauge, IntGaugeVec,
};
lazy_static! {
@ -63,4 +63,9 @@ lazy_static! {
"Meilisearch Searches Being Processed"
))
.expect("Can't create a metric");
pub static ref MEILISEARCH_TASK_QUEUE_LATENCY_SECONDS: Gauge = register_gauge!(
"meilisearch_task_queue_latency_seconds",
"Meilisearch Task Queue Latency in Seconds",
)
.expect("Can't create a metric");
}

35
crates/meilisearch/src/routes/metrics.rs
View File

@ -1,16 +1,17 @@
use actix_web::http::header;
use actix_web::web::{self, Data};
use actix_web::HttpResponse;
use index_scheduler::IndexScheduler;
use meilisearch_auth::AuthController;
use meilisearch_types::error::ResponseError;
use meilisearch_types::keys::actions;
use prometheus::{Encoder, TextEncoder};
use crate::extractors::authentication::policies::ActionPolicy;
use crate::extractors::authentication::{AuthenticationError, GuardedData};
use crate::routes::create_all_stats;
use crate::search_queue::SearchQueue;
use actix_web::http::header;
use actix_web::web::{self, Data};
use actix_web::HttpResponse;
use index_scheduler::{IndexScheduler, Query};
use meilisearch_auth::AuthController;
use meilisearch_types::error::ResponseError;
use meilisearch_types::keys::actions;
use meilisearch_types::tasks::Status;
use prometheus::{Encoder, TextEncoder};
use time::OffsetDateTime;
pub fn configure(config: &mut web::ServiceConfig) {
config.service(web::resource("").route(web::get().to(get_metrics)));
@ -61,6 +62,22 @@ pub async fn get_metrics(
}
crate::metrics::MEILISEARCH_IS_INDEXING.set(index_scheduler.is_task_processing()? as i64);
let task_queue_latency_seconds = index_scheduler
.get_tasks_from_authorized_indexes(
Query {
limit: Some(1),
reverse: Some(true),
statuses: Some(vec![Status::Enqueued, Status::Processing]),
..Query::default()
},
auth_filters,
)?
.0
.first()
.map(|task| (OffsetDateTime::now_utc() - task.enqueued_at).as_seconds_f64())
.unwrap_or(0.0);
crate::metrics::MEILISEARCH_TASK_QUEUE_LATENCY_SECONDS.set(task_queue_latency_seconds);
let encoder = TextEncoder::new();
let mut buffer = vec![];
encoder.encode(&prometheus::gather(), &mut buffer).expect("Failed to encode metrics");