feat(node-core, storage): static files segment metrics (#6908)

crates/node-builder/src/builder.rs

@@ -395,17 +395,22 @@ where
         // Does not do anything on windows.
         fdlimit::raise_fd_limit()?;
 
-        let prometheus_handle = config.install_prometheus_recorder()?;
-        config.start_metrics_endpoint(prometheus_handle, database.clone()).await?;
-
-        info!(target: "reth::cli", "Database opened");
-
         let provider_factory = ProviderFactory::new(
             database.clone(),
             Arc::clone(&config.chain),
             data_dir.static_files_path(),
         )?
         .with_static_files_metrics();
+        info!(target: "reth::cli", "Database opened");
+
+        let prometheus_handle = config.install_prometheus_recorder()?;
+        config
+            .start_metrics_endpoint(
+                prometheus_handle,
+                database.clone(),
+                provider_factory.static_file_provider(),
+            )
+            .await?;
 
         debug!(target: "reth::cli", chain=%config.chain.chain, genesis=?config.chain.genesis_hash(), "Initializing genesis");
 

crates/node-core/src/metrics/prometheus_exporter.rs

@@ -11,6 +11,7 @@ use metrics_exporter_prometheus::{PrometheusBuilder, PrometheusHandle};
 use metrics_util::layers::{PrefixLayer, Stack};
 use reth_db::database_metrics::DatabaseMetrics;
 use reth_metrics::metrics::Unit;
+use reth_provider::providers::StaticFileProvider;
 use std::{convert::Infallible, net::SocketAddr, sync::Arc};
 
 pub(crate) trait Hook: Fn() + Send + Sync {}
@@ -79,17 +80,24 @@ pub async fn serve<Metrics>(
     listen_addr: SocketAddr,
     handle: PrometheusHandle,
     db: Metrics,
+    static_file_provider: StaticFileProvider,
     process: metrics_process::Collector,
 ) -> eyre::Result<()>
 where
     Metrics: DatabaseMetrics + 'static + Send + Sync,
 {
     let db_metrics_hook = move || db.report_metrics();
+    let static_file_metrics_hook = move || {
+        let _ = static_file_provider.report_metrics().map_err(
+            |error| tracing::error!(%error, "Failed to report static file provider metrics"),
+        );
+    };
 
     // Clone `process` to move it into the hook and use the original `process` for describe below.
     let cloned_process = process.clone();
     let hooks: Vec<Box<dyn Hook<Output = ()>>> = vec![
         Box::new(db_metrics_hook),
+        Box::new(static_file_metrics_hook),
         Box::new(move || cloned_process.collect()),
         Box::new(collect_memory_stats),
         Box::new(collect_io_stats),
@@ -106,6 +114,14 @@ where
         "db.timed_out_not_aborted_transactions",
         "Number of timed out transactions that were not aborted by the user yet"
     );
+
+    describe_gauge!("static_files.segment_size", Unit::Bytes, "The size of a static file segment");
+    describe_gauge!("static_files.segment_files", "The number of files for a static file segment");
+    describe_gauge!(
+        "static_files.segment_entries",
+        "The number of entries for a static file segment"
+    );
+
     process.describe();
     describe_memory_stats();
     describe_io_stats();

crates/node-core/src/node_config.rs

@@ -47,9 +47,10 @@ use reth_primitives::{
     BlockHashOrNumber, BlockNumber, ChainSpec, Head, SealedHeader, TxHash, B256, MAINNET,
 };
 use reth_provider::{
-    providers::BlockchainProvider, BlockHashReader, BlockNumReader, BlockReader,
-    BlockchainTreePendingStateProvider, CanonStateSubscriptions, HeaderProvider, HeaderSyncMode,
-    ProviderFactory, StageCheckpointReader,
+    providers::{BlockchainProvider, StaticFileProvider},
+    BlockHashReader, BlockNumReader, BlockReader, BlockchainTreePendingStateProvider,
+    CanonStateSubscriptions, HeaderProvider, HeaderSyncMode, ProviderFactory,
+    StageCheckpointReader,
 };
 use reth_revm::EvmProcessorFactory;
 use reth_stages::{
@@ -599,6 +600,7 @@ impl NodeConfig {
         &self,
         prometheus_handle: PrometheusHandle,
         db: Metrics,
+        static_file_provider: StaticFileProvider,
     ) -> eyre::Result<()>
     where
         Metrics: DatabaseMetrics + 'static + Send + Sync,
@@ -609,6 +611,7 @@ impl NodeConfig {
                 listen_addr,
                 prometheus_handle,
                 db,
+                static_file_provider,
                 metrics_process::Collector::default(),
             )
             .await?;

crates/primitives/src/fs.rs

@@ -119,6 +119,15 @@ pub enum FsPathError {
         /// The path related to the operation.
         path: PathBuf,
     },
+
+    /// Error variant for failed file metadata operation with additional path context.
+    #[error("failed to get metadata for {path:?}: {source}")]
+    Metadata {
+        /// The source `io::Error`.
+        source: io::Error,
+        /// The path related to the operation.
+        path: PathBuf,
+    },
 }
 
 impl FsPathError {
@@ -171,6 +180,11 @@ impl FsPathError {
     pub fn rename(source: io::Error, from: impl Into<PathBuf>, to: impl Into<PathBuf>) -> Self {
         FsPathError::Rename { source, from: from.into(), to: to.into() }
     }
+
+    /// Returns the complementary error variant for [`std::fs::File::metadata`].
+    pub fn metadata(source: io::Error, path: impl Into<PathBuf>) -> Self {
+        FsPathError::Metadata { source, path: path.into() }
+    }
 }
 
 type Result<T> = std::result::Result<T, FsPathError>;
@@ -225,3 +239,9 @@ pub fn rename(from: impl AsRef<Path>, to: impl AsRef<Path>) -> Result<()> {
     let to = to.as_ref();
     fs::rename(from, to).map_err(|err| FsPathError::rename(err, from, to))
 }
+
+/// Wrapper for `std::fs::metadata`
+pub fn metadata(path: impl AsRef<Path>) -> Result<fs::Metadata> {
+    let path = path.as_ref();
+    fs::metadata(path).map_err(|err| FsPathError::metadata(err, path))
+}

crates/storage/provider/src/providers/static_file/manager.rs

@@ -114,6 +114,45 @@ impl StaticFileProvider {
         Self(Arc::new(provider))
     }
 
+    /// Reports metrics for the static files.
+    pub fn report_metrics(&self) -> ProviderResult<()> {
+        let Some(metrics) = &self.metrics else { return Ok(()) };
+
+        let static_files = iter_static_files(&self.path)?;
+        for (segment, ranges) in static_files {
+            let mut entries = 0;
+            let mut size = 0;
+
+            for (block_range, _) in &ranges {
+                let fixed_block_range = find_fixed_range(block_range.start());
+                let jar_provider = self
+                    .get_segment_provider(segment, || Some(fixed_block_range), None)?
+                    .ok_or(ProviderError::MissingStaticFileBlock(segment, block_range.start()))?;
+
+                entries += jar_provider.rows();
+
+                let data_size = reth_primitives::fs::metadata(jar_provider.data_path())
+                    .map(|metadata| metadata.len())
+                    .unwrap_or_default();
+                let index_size = reth_primitives::fs::metadata(jar_provider.index_path())
+                    .map(|metadata| metadata.len())
+                    .unwrap_or_default();
+                let offsets_size = reth_primitives::fs::metadata(jar_provider.offsets_path())
+                    .map(|metadata| metadata.len())
+                    .unwrap_or_default();
+                let config_size = reth_primitives::fs::metadata(jar_provider.config_path())
+                    .map(|metadata| metadata.len())
+                    .unwrap_or_default();
+
+                size += data_size + index_size + offsets_size + config_size;
+            }
+
+            metrics.record_segment(segment, size, ranges.len(), entries);
+        }
+
+        Ok(())
+    }
+
     /// Gets the [`StaticFileJarProvider`] of the requested segment and block.
     pub fn get_segment_provider_from_block(
         &self,

crates/storage/provider/src/providers/static_file/metrics.rs

@@ -1,7 +1,7 @@
 use std::{collections::HashMap, time::Duration};
 
 use itertools::Itertools;
-use metrics::{Counter, Histogram};
+use metrics::{Counter, Gauge, Histogram};
 use reth_metrics::Metrics;
 use reth_primitives::StaticFileSegment;
 use strum::{EnumIter, IntoEnumIterator};
@@ -9,6 +9,7 @@ use strum::{EnumIter, IntoEnumIterator};
 /// Metrics for the static file provider.
 #[derive(Debug)]
 pub struct StaticFileProviderMetrics {
+    segments: HashMap<StaticFileSegment, StaticFileSegmentMetrics>,
     segment_operations: HashMap<
         (StaticFileSegment, StaticFileProviderOperation),
         StaticFileProviderOperationMetrics,
@@ -18,6 +19,14 @@ pub struct StaticFileProviderMetrics {
 impl Default for StaticFileProviderMetrics {
     fn default() -> Self {
         Self {
+            segments: StaticFileSegment::iter()
+                .map(|segment| {
+                    (
+                        segment,
+                        StaticFileSegmentMetrics::new_with_labels(&[("segment", segment.as_str())]),
+                    )
+                })
+                .collect(),
             segment_operations: StaticFileSegment::iter()
                 .cartesian_product(StaticFileProviderOperation::iter())
                 .map(|(segment, operation)| {
@@ -35,6 +44,22 @@ impl Default for StaticFileProviderMetrics {
 }
 
 impl StaticFileProviderMetrics {
+    pub(crate) fn record_segment(
+        &self,
+        segment: StaticFileSegment,
+        size: u64,
+        files: usize,
+        entries: usize,
+    ) {
+        self.segments.get(&segment).expect("segment metrics should exist").size.set(size as f64);
+        self.segments.get(&segment).expect("segment metrics should exist").files.set(files as f64);
+        self.segments
+            .get(&segment)
+            .expect("segment metrics should exist")
+            .entries
+            .set(entries as f64);
+    }
+
     pub(crate) fn record_segment_operation(
         &self,
         segment: StaticFileSegment,
@@ -80,6 +105,18 @@ impl StaticFileProviderOperation {
     }
 }
 
+/// Metrics for a specific static file segment.
+#[derive(Metrics)]
+#[metrics(scope = "static_files.segment")]
+pub(crate) struct StaticFileSegmentMetrics {
+    /// The size of a static file segment
+    size: Gauge,
+    /// The number of files for a static file segment
+    files: Gauge,
+    /// The number of entries for a static file segment
+    entries: Gauge,
+}
+
 #[derive(Metrics)]
 #[metrics(scope = "static_files.jar_provider")]
 pub(crate) struct StaticFileProviderOperationMetrics {