lighthouse/beacon_node/rest_api/src/metrics.rs
Paul Hauner c4ced3e0d2
Fix block processing blowup, upgrade metrics (#500)
* Renamed fork_choice::process_attestation_from_block

* Processing attestation in fork choice

* Retrieving state from store and checking signature

* Looser check on beacon state validity.

* Cleaned up get_attestation_state

* Expanded fork choice api to provide latest validator message.

* Checking if the an attestation contains a latest message

* Correct process_attestation error handling.

* Copy paste error in comment fixed.

* Tidy ancestor iterators

* Getting attestation slot via helper method

* Refactored attestation creation in test utils

* Revert "Refactored attestation creation in test utils"

This reverts commit 4d277fe4239a7194758b18fb5c00dfe0b8231306.

* Integration tests for free attestation processing

* Implicit conflicts resolved.

* formatting

* Do first pass on Grants code

* Add another attestation processing test

* Tidy attestation processing

* Remove old code fragment

* Add non-compiling half finished changes

* Simplify, fix bugs, add tests for chain iters

* Remove attestation processing from op pool

* Fix bug with fork choice, tidy

* Fix overly restrictive check in fork choice.

* Ensure committee cache is build during attn proc

* Ignore unknown blocks at fork choice

* Various minor fixes

* Make fork choice write lock in to read lock

* Remove unused method

* Tidy comments

* Fix attestation prod. target roots change

* Fix compile error in store iters

* Reject any attestation prior to finalization

* Begin metrics refactor

* Move beacon_chain to new metrics structure.

* Make metrics not panic if already defined

* Use global prometheus gather at rest api

* Unify common metric fns into a crate

* Add heavy metering to block processing

* Remove hypen from prometheus metric name

* Add more beacon chain metrics

* Add beacon chain persistence metric

* Prune op pool on finalization

* Add extra prom beacon chain metrics

* Prefix BeaconChain metrics with "beacon_"

* Add more store metrics

* Add basic metrics to libp2p

* Add metrics to HTTP server

* Remove old `http_server` crate

* Update metrics names to be more like standard

* Fix broken beacon chain metrics, add slot clock metrics

* Add lighthouse_metrics gather fn

* Remove http args

* Fix wrong state given to op pool prune

* Make prom metric names more consistent

* Add more metrics, tidy existing metrics

* Fix store block read metrics

* Tidy attestation metrics

* Fix minor PR comments

* Allow travis failures on beta (see desc)

There's a non-backward compatible change in `cargo fmt`. Stable and beta
do not agree.

* Tidy `lighthouse_metrics` docs

* Fix typo
2019-08-19 21:02:34 +10:00

70 lines
2.7 KiB
Rust

use crate::{success_response, ApiError, ApiResult, DBPath};
use beacon_chain::{BeaconChain, BeaconChainTypes};
use hyper::{Body, Request};
use prometheus::{Encoder, TextEncoder};
use std::sync::Arc;
pub use lighthouse_metrics::*;
lazy_static! {
pub static ref REQUEST_RESPONSE_TIME: Result<Histogram> = try_create_histogram(
"http_server_request_duration_seconds",
"Time taken to build a response to a HTTP request"
);
pub static ref REQUEST_COUNT: Result<IntCounter> = try_create_int_counter(
"http_server_request_total",
"Total count of HTTP requests received"
);
pub static ref SUCCESS_COUNT: Result<IntCounter> = try_create_int_counter(
"http_server_success_total",
"Total count of HTTP 200 responses sent"
);
}
/// Returns the full set of Prometheus metrics for the Beacon Node application.
///
/// # Note
///
/// This is a HTTP handler method.
pub fn get_prometheus<T: BeaconChainTypes + 'static>(req: Request<Body>) -> ApiResult {
let mut buffer = vec![];
let encoder = TextEncoder::new();
let beacon_chain = req
.extensions()
.get::<Arc<BeaconChain<T>>>()
.ok_or_else(|| ApiError::ServerError("Beacon chain extension missing".to_string()))?;
let db_path = req
.extensions()
.get::<DBPath>()
.ok_or_else(|| ApiError::ServerError("DBPath extension missing".to_string()))?;
// There are two categories of metrics:
//
// - Dynamically updated: things like histograms and event counters that are updated on the
// fly.
// - Statically updated: things which are only updated at the time of the scrape (used where we
// can avoid cluttering up code with metrics calls).
//
// The `lighthouse_metrics` crate has a `DEFAULT_REGISTRY` global singleton (via `lazy_static`)
// which keeps the state of all the metrics. Dynamically updated things will already be
// up-to-date in the registry (because they update themselves) however statically updated
// things need to be "scraped".
//
// We proceed by, first updating all the static metrics using `scrape_for_metrics(..)`. Then,
// using `lighthouse_metrics::gather(..)` to collect the global `DEFAULT_REGISTRY` metrics into
// a string that can be returned via HTTP.
slot_clock::scrape_for_metrics::<T::EthSpec, T::SlotClock>(&beacon_chain.slot_clock);
store::scrape_for_metrics(&db_path);
beacon_chain::scrape_for_metrics(&beacon_chain);
encoder
.encode(&lighthouse_metrics::gather(), &mut buffer)
.unwrap();
String::from_utf8(buffer)
.map(|string| success_response(Body::from(string)))
.map_err(|e| ApiError::ServerError(format!("Failed to encode prometheus info: {:?}", e)))
}