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Add extra prom beacon chain metrics

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This commit is contained in:
Paul Hauner
2019-08-12 13:26:58 +10:00
parent 6150f0ae1a
commit 7140dbc45d
10 changed files with 233 additions and 11 deletions
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18
beacon_node/rest_api/src/metrics.rs
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@@ -1,12 +1,26 @@
use crate::{success_response, ApiError, ApiResult};
use crate::{success_response, ApiError, ApiResult, DBPath};
use beacon_chain::{BeaconChain, BeaconChainTypes};
use hyper::{Body, Request};
use prometheus::{Encoder, TextEncoder};
use std::sync::Arc;
/// Returns the full set of Prometheus metrics for the Beacon Node application.
pub fn get_prometheus(_req: Request<Body>) -> ApiResult {
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()))?;
store::scrape_for_metrics(&db_path);
beacon_chain::scrape_for_metrics(&beacon_chain);
encoder.encode(&prometheus::gather(), &mut buffer).unwrap();
String::from_utf8(buffer)