fix: fix pool metadata protocol version refresh, rivetkit native ws (#4585)

# Description

Please include a summary of the changes and the related issue. Please also include relevant motivation and context.

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
- [ ] This change requires a documentation update

## How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

## Checklist:

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my feature works
- [ ] New and existing unit tests pass locally with my changes

Author: MasterPtato

Cargo.lock

@@ -10,7 +10,7 @@ use serde::{Deserialize, Serialize};
 use utoipa::IntoParams;
 use utoipa::ToSchema;
 
-use super::utils::{ServerlessMetadataError, fetch_serverless_runner_metadata};
+use super::utils::{ServerlessMetadataError, fetch_serverless_metadata};
 use crate::ctx::ApiCtx;
 
 #[derive(Debug, Serialize, Deserialize, Clone, IntoParams)]
@@ -72,7 +72,7 @@ async fn serverless_health_check_inner(
 
 	let ServerlessHealthCheckRequest { url, headers } = body;
 
-	match fetch_serverless_runner_metadata(&ctx, url, headers).await {
+	match fetch_serverless_metadata(&ctx, url, headers).await {
 		Ok(metadata) => Ok(ServerlessHealthCheckResponse::Success {
 			version: metadata.version,
 		}),

engine/artifacts/config-schema.json

@@ -1,3 +1,4 @@
+use anyhow::Result;
 use std::collections::HashMap;
 
 use gas::prelude::*;
@@ -35,11 +36,11 @@ impl From<pegboard::ops::serverless_metadata::fetch::Output> for ServerlessMetad
 ///
 /// Returns metadata including runtime, version, and actor names if available.
 #[tracing::instrument(skip_all)]
-pub async fn fetch_serverless_runner_metadata(
+pub async fn fetch_serverless_metadata(
 	ctx: &ApiCtx,
 	url: String,
 	headers: HashMap<String, String>,
-) -> Result<ServerlessMetadata, ServerlessMetadataError> {
+) -> std::result::Result<ServerlessMetadata, ServerlessMetadataError> {
 	ctx.op(pegboard::ops::serverless_metadata::fetch::Input { url, headers })
 		.await
 		.map_err(|_| ServerlessMetadataError::RequestFailed {})?
@@ -54,49 +55,23 @@ pub async fn refresh_runner_config_metadata(
 	runner_name: String,
 	url: String,
 	headers: HashMap<String, String>,
-) -> anyhow::Result<()> {
+) -> Result<()> {
 	tracing::debug!(
 		?namespace_id,
 		?runner_name,
 		"refreshing runner config metadata"
 	);
 
-	// Fetch metadata using the op
-	let metadata = ctx
-		.op(pegboard::ops::serverless_metadata::fetch::Input { url, headers })
-		.await?
-		.map_err(|e| {
-			pegboard::errors::ServerlessRunnerPool::FailedToFetchMetadata { reason: e }.build()
-		})?;
-
-	if !metadata.actor_names.is_empty() {
-		tracing::debug!(
-			actor_names_count = metadata.actor_names.len(),
-			"storing actor names metadata"
-		);
-
-		// Convert and store actor names
-		let actor_names: Vec<pegboard::ops::actor_name::upsert_batch::ActorNameEntry> = metadata
-			.actor_names
-			.into_iter()
-			.map(
-				|a| pegboard::ops::actor_name::upsert_batch::ActorNameEntry {
-					name: a.name,
-					metadata: a.metadata,
-				},
-			)
-			.collect();
-
-		ctx.op(pegboard::ops::actor_name::upsert_batch::Input {
-			namespace_id,
-			actor_names,
-		})
-		.await?;
-
-		tracing::debug!("successfully stored actor names metadata");
-	} else {
-		tracing::debug!("no actor names to store");
-	}
+	ctx.op(pegboard::ops::runner_config::refresh_metadata::Input {
+		namespace_id,
+		runner_name,
+		url,
+		headers,
+	})
+	.await?
+	.map_err(|e| {
+		pegboard::errors::ServerlessRunnerPool::FailedToFetchMetadata { reason: e }.build()
+	})?;
 
 	Ok(())
 }

engine/packages/api-public/src/runner_configs/serverless_health_check.rs

@@ -14,7 +14,7 @@ pub type Cache = Arc<CacheInner>;
 
 /// Utility type used to hold information relating to caching.
 pub struct CacheInner {
-	pub(crate) driver: Driver,
+	pub(crate) driver: Option<Driver>,
 	pub(crate) ups: Option<universalpubsub::PubSub>,
 }
 
@@ -33,15 +33,28 @@ impl CacheInner {
 		let ups = pools.ups().ok();
 
 		match &config.cache().driver {
-			rivet_config::config::CacheDriver::InMemory => Ok(Self::new_in_memory(10000, ups)),
+			Some(rivet_config::config::CacheDriver::InMemory) => {
+				Ok(Self::new_in_memory(10000, ups))
+			}
+			None => Ok(Self::new_disabled()),
 		}
 	}
 
 	#[tracing::instrument(skip(ups))]
 	pub fn new_in_memory(max_capacity: u64, ups: Option<universalpubsub::PubSub>) -> Cache {
 		let driver = Driver::InMemory(InMemoryDriver::new(max_capacity));
 
-		Arc::new(CacheInner { driver, ups })
+		Arc::new(CacheInner {
+			driver: Some(driver),
+			ups,
+		})
+	}
+
+	pub fn new_disabled() -> Cache {
+		Arc::new(CacheInner {
+			driver: None,
+			ups: None,
+		})
 	}
 
 	pub(crate) fn in_flight(&self) -> &scc::HashMap<RawCacheKey, broadcast::Sender<()>> {

engine/packages/api-public/src/runner_configs/utils.rs

@@ -81,15 +81,27 @@ impl RequestConfig {
 
 		let mut ctx = GetterCtx::new(keys);
 
+		// No driver (cache disabled)
+		let Some(driver) = &self.cache.driver else {
+			let keys = ctx.unresolved_keys();
+			let ctx = getter(ctx, keys).await.map_err(Error::Getter)?;
+
+			metrics::CACHE_VALUE_EMPTY_TOTAL
+				.with_label_values(&[&base_key])
+				.inc_by(ctx.unresolved_keys().len() as u64);
+
+			return Ok(ctx.into_values());
+		};
+
 		// Build driver-specific cache keys
 		let (keys, cache_keys): (Vec<_>, Vec<_>) = ctx
 			.entries()
-			.map(|(key, _)| (key.clone(), self.cache.driver.process_key(&base_key, key)))
+			.map(|(key, _)| (key.clone(), driver.process_key(&base_key, key)))
 			.unzip();
 		let cache_keys_len = cache_keys.len();
 
 		// Attempt to fetch value from cache, fall back to getter
-		match self.cache.driver.get(&base_key, &cache_keys).await {
+		match driver.get(&base_key, &cache_keys).await {
 			Ok(cached_values) => {
 				debug_assert_eq!(
 					cache_keys_len,
@@ -128,7 +140,7 @@ impl RequestConfig {
 
 					// Determine which keys are currently being fetched and not
 					for key in remaining_keys {
-						let cache_key = self.cache.driver.process_key(&base_key, &key);
+						let cache_key = driver.process_key(&base_key, &key);
 						match self.cache.in_flight().entry_async(cache_key).await {
 							scc::hash_map::Entry::Occupied(broadcast) => {
 								waiting_keys.push((key, broadcast.subscribe()));
@@ -141,7 +153,6 @@ impl RequestConfig {
 					}
 
 					let getter2 = getter.clone();
-					let cache = self.cache.clone();
 					let ctx2 = GetterCtx::new(leased_keys.clone());
 					let base_key2 = base_key.clone();
 					let leased_keys2 = leased_keys.clone();
@@ -178,8 +189,7 @@ impl RequestConfig {
 									.into_iter()
 									.partition_map(|(key, succeeded)| {
 										if succeeded {
-											let cache_key =
-												cache.driver.process_key(&base_key2, &key);
+											let cache_key = driver.process_key(&base_key2, &key);
 											Either::Left((key, cache_key))
 										} else {
 											Either::Right(key)
@@ -193,7 +203,7 @@ impl RequestConfig {
 									if succeeded_cache_keys.is_empty() {
 										Ok(Vec::new())
 									} else {
-										cache.driver.get(&base_key2, &succeeded_cache_keys).await
+										driver.get(&base_key2, &succeeded_cache_keys).await
 									}
 								},
 								async {
@@ -255,7 +265,7 @@ impl RequestConfig {
 						.into_iter()
 						.filter_map(|(key, value)| {
 							// Process the key with the appropriate driver
-							let cache_key = self.cache.driver.process_key(&base_key, key);
+							let cache_key = driver.process_key(&base_key, key);
 							// Try to decode the value using the driver
 							match encoder(value) {
 								Ok(value_bytes) => Some((cache_key, value_bytes, expire_at)),
@@ -269,10 +279,9 @@ impl RequestConfig {
 						.collect::<Vec<_>>();
 
 					if !entries_values.is_empty() {
-						let cache = self.cache.clone();
 						let base_key_clone = base_key.clone();
 
-						if let Err(err) = cache.driver.set(&base_key_clone, entries_values).await {
+						if let Err(err) = driver.set(&base_key_clone, entries_values).await {
 							tracing::error!(?err, "failed to write to cache");
 						}
 
@@ -281,7 +290,7 @@ impl RequestConfig {
 
 					// Release leases
 					for key in leased_keys {
-						let cache_key = self.cache.driver.process_key(&base_key, &key);
+						let cache_key = driver.process_key(&base_key, &key);
 						self.cache.in_flight().remove_async(&cache_key).await;
 					}
 				}
@@ -298,13 +307,17 @@ impl RequestConfig {
 					"failed to read batch keys from cache, falling back to getter"
 				);
 
+				let keys = ctx.unresolved_keys();
+
 				metrics::CACHE_REQUEST_ERRORS
 					.with_label_values(&[&base_key])
 					.inc();
+				metrics::CACHE_VALUE_MISS_TOTAL
+					.with_label_values(&[base_key.as_str()])
+					.inc_by(keys.len() as u64);
 
 				// Fall back to the getter since we can't fetch the value from
 				// the cache
-				let keys = ctx.unresolved_keys();
 				let ctx = getter(ctx, keys).await.map_err(Error::Getter)?;
 
 				metrics::CACHE_VALUE_EMPTY_TOTAL
@@ -325,11 +338,16 @@ impl RequestConfig {
 	where
 		Key: CacheKey + Send + Sync,
 	{
+		// Cache disabled
+		let Some(driver) = &self.cache.driver else {
+			return Ok(());
+		};
+
 		// Build keys
 		let base_key = base_key.as_ref();
 		let cache_keys = keys
 			.into_iter()
-			.map(|key| self.cache.driver.process_key(base_key, &key))
+			.map(|key| driver.process_key(base_key, &key))
 			.collect::<Vec<_>>();
 
 		if cache_keys.is_empty() {
@@ -375,6 +393,11 @@ impl RequestConfig {
 		base_key: impl AsRef<str> + Debug,
 		keys: Vec<RawCacheKey>,
 	) -> Result<()> {
+		// Cache disabled
+		let Some(driver) = &self.cache.driver else {
+			return Ok(());
+		};
+
 		let base_key = base_key.as_ref();
 
 		if keys.is_empty() {
@@ -389,7 +412,7 @@ impl RequestConfig {
 			.inc_by(keys.len() as u64);
 
 		// Delete keys locally
-		match self.cache.driver.delete(base_key, keys).await {
+		match driver.delete(base_key, keys).await {
 			Ok(_) => {
 				tracing::trace!("successfully deleted keys");
 			}

engine/packages/cache/src/inner.rs

@@ -5,17 +5,25 @@ use serde::{Deserialize, Serialize};
 #[derive(Debug, Serialize, Deserialize, Clone, JsonSchema)]
 #[serde(deny_unknown_fields)]
 pub struct Cache {
-	pub driver: CacheDriver,
+	pub enabled: bool,
+	pub driver: Option<CacheDriver>,
 }
 
 impl Default for Cache {
 	fn default() -> Cache {
 		Self {
-			driver: CacheDriver::InMemory,
+			enabled: true,
+			driver: None,
 		}
 	}
 }
 
+impl Cache {
+	pub fn driver(&self) -> CacheDriver {
+		self.driver.clone().unwrap_or(CacheDriver::InMemory)
+	}
+}
+
 #[derive(Debug, Serialize, Deserialize, Clone, JsonSchema)]
 #[serde(rename_all = "snake_case", deny_unknown_fields)]
 pub enum CacheDriver {

engine/packages/cache/src/req_config.rs

@@ -8,14 +8,14 @@ use std::collections::HashMap;
 use std::sync::Arc;
 
 // Re-export everything from the standalone package
+pub use rivet_envoy_protocol::PROTOCOL_VERSION;
 pub use rivet_test_envoy::{
 	ActorConfig, ActorEvent, ActorLifecycleEvent, ActorStartResult, ActorStopResult,
 	CountingCrashActor, CrashNTimesThenSucceedActor, CrashOnStartActor, CustomActor,
 	CustomActorBuilder, DelayedStartActor, EchoActor, Envoy, EnvoyBuilder, EnvoyConfig, KvRequest,
 	NotifyOnStartActor, SleepImmediatelyActor, StopImmediatelyActor, TestActor, TimeoutActor,
 	VerifyInputActor,
 };
-pub use rivet_envoy_protocol::PROTOCOL_VERSION;
 
 // Type alias for backwards compatibility
 pub type TestEnvoy = Envoy;