Add ability to prefix worker_id in config

WorkerId can now be prefixed with a config. This will cause all
internal WorkerIds to be prefixed with this config followed by
a generated UUIDv6.

nativelink-config/src/cas_server.rs

@@ -605,7 +605,8 @@ pub struct UploadActionResultConfig {
 #[serde(deny_unknown_fields)]
 pub struct LocalWorkerConfig {
     /// Name of the worker. This is give a more friendly name to a worker for logging
-    /// and metric publishing.
+    /// and metric publishing. This is also the prefix of the worker id
+    /// (ie: "{name}{uuidv6}").
     /// Default: {Index position in the workers list}
     #[serde(default, deserialize_with = "convert_string_with_shellexpand")]
     pub name: String,

nativelink-proto/com/github/trace_machina/nativelink/remote_execution/worker_api.proto

@@ -33,7 +33,7 @@ service WorkerApi {
     /// this worker supports. The response must be listened on the client
     /// side for updates from the server. The first item sent will always be
     /// a ConnectionResult, after that it is undefined.
-    rpc ConnectWorker(SupportedProperties) returns (stream UpdateForWorker);
+    rpc ConnectWorker(ConnectWorkerRequest) returns (stream UpdateForWorker);
 
     /// Message used to let the scheduler know that it is still alive as
     /// well as check to see if the scheduler is still alive. The scheduler
@@ -74,8 +74,8 @@ message GoingAwayRequest {
 }
 
 /// Represents the initial request sent to the scheduler informing the
-/// scheduler about this worker's capabilities.
-message SupportedProperties {
+/// scheduler about this worker's capabilities and metadata.
+message ConnectWorkerRequest {
     /// The list of properties this worker can support. The exact
     /// implementation is driven by the configuration matrix between the
     /// worker and scheduler.
@@ -87,7 +87,13 @@ message SupportedProperties {
     /// The details on how to use this property can be found here:
     /// https://github.com/TraceMachina/nativelink/blob/3147265047544572e3483c985e4aab0f9fdded38/nativelink-config/src/cas_server.rs
     repeated build.bazel.remote.execution.v2.Platform.Property properties = 1;
-    reserved 2; // NextId.
+
+    /// Prefix to use for worker IDs. This is primarily used for debugging
+    /// or for other systems to identify workers. The scheduler will always
+    /// append this prefix to the assigned worker_id followed by a UUIDv6.
+    string worker_id_prefix = 2;
+
+    reserved 3; // NextId.
 }
 
 /// The result of an ExecutionRequest.

nativelink-proto/genproto/com.github.trace_machina.nativelink.remote_execution.pb.rs

@@ -28,9 +28,9 @@ pub struct GoingAwayRequest {
     pub worker_id: ::prost::alloc::string::String,
 }
 /// / Represents the initial request sent to the scheduler informing the
-/// / scheduler about this worker's capabilities.
+/// / scheduler about this worker's capabilities and metadata.
 #[derive(Clone, PartialEq, ::prost::Message)]
-pub struct SupportedProperties {
+pub struct ConnectWorkerRequest {
     /// / The list of properties this worker can support. The exact
     /// / implementation is driven by the configuration matrix between the
     /// / worker and scheduler.
@@ -45,6 +45,11 @@ pub struct SupportedProperties {
     pub properties: ::prost::alloc::vec::Vec<
         super::super::super::super::super::build::bazel::remote::execution::v2::platform::Property,
     >,
+    /// / Prefix to use for worker IDs. This is primarily used for debugging
+    /// / or for other systems to identify workers. The scheduler will always
+    /// / append this prefix to the assigned worker_id followed by a UUIDv6.
+    #[prost(string, tag = "2")]
+    pub worker_id_prefix: ::prost::alloc::string::String,
 }
 /// / The result of an ExecutionRequest.
 #[derive(Clone, PartialEq, ::prost::Message)]
@@ -261,7 +266,7 @@ pub mod worker_api_client {
         /// / a ConnectionResult, after that it is undefined.
         pub async fn connect_worker(
             &mut self,
-            request: impl tonic::IntoRequest<super::SupportedProperties>,
+            request: impl tonic::IntoRequest<super::ConnectWorkerRequest>,
         ) -> std::result::Result<
             tonic::Response<tonic::codec::Streaming<super::UpdateForWorker>>,
             tonic::Status,
@@ -410,7 +415,7 @@ pub mod worker_api_server {
         /// / a ConnectionResult, after that it is undefined.
         async fn connect_worker(
             &self,
-            request: tonic::Request<super::SupportedProperties>,
+            request: tonic::Request<super::ConnectWorkerRequest>,
         ) -> std::result::Result<
             tonic::Response<Self::ConnectWorkerStream>,
             tonic::Status,
@@ -533,7 +538,7 @@ pub mod worker_api_server {
                     struct ConnectWorkerSvc<T: WorkerApi>(pub Arc<T>);
                     impl<
                         T: WorkerApi,
-                    > tonic::server::ServerStreamingService<super::SupportedProperties>
+                    > tonic::server::ServerStreamingService<super::ConnectWorkerRequest>
                     for ConnectWorkerSvc<T> {
                         type Response = super::UpdateForWorker;
                         type ResponseStream = T::ConnectWorkerStream;
@@ -543,7 +548,7 @@ pub mod worker_api_server {
                         >;
                         fn call(
                             &mut self,
-                            request: tonic::Request<super::SupportedProperties>,
+                            request: tonic::Request<super::ConnectWorkerRequest>,
                         ) -> Self::Future {
                             let inner = Arc::clone(&self.0);
                             let fut = async move {

nativelink-scheduler/src/api_worker_scheduler.rs

@@ -111,7 +111,7 @@ impl ApiWorkerSchedulerImpl {
         for operation_id in worker.running_action_infos.keys() {
             if self
                 .operation_keep_alive_tx
-                .send((operation_id.clone(), *worker_id))
+                .send((operation_id.clone(), worker_id.clone()))
                 .is_err()
             {
                 event!(
@@ -128,8 +128,8 @@ impl ApiWorkerSchedulerImpl {
     /// Adds a worker to the pool.
     /// Note: This function will not do any task matching.
     fn add_worker(&mut self, worker: Worker) -> Result<(), Error> {
-        let worker_id = worker.id;
-        self.workers.put(worker_id, worker);
+        let worker_id = worker.id.clone();
+        self.workers.put(worker_id.clone(), worker);
 
         // Worker is not cloneable, and we do not want to send the initial connection results until
         // we have added it to the map, or we might get some strange race conditions due to the way
@@ -189,7 +189,7 @@ impl ApiWorkerSchedulerImpl {
                 w.can_accept_work() && platform_properties.is_satisfied_by(&w.platform_properties)
             }),
         };
-        workers_iter.map(|(_, w)| &w.id).copied()
+        workers_iter.map(|(_, w)| w.id.clone())
     }
 
     async fn update_action(
@@ -451,7 +451,7 @@ impl WorkerScheduler for ApiWorkerScheduler {
 
     async fn add_worker(&self, worker: Worker) -> Result<(), Error> {
         let mut inner = self.inner.lock().await;
-        let worker_id = worker.id;
+        let worker_id = worker.id.clone();
         let result = inner
             .add_worker(worker)
             .err_tip(|| "Error while adding worker, removing from pool");
@@ -505,7 +505,7 @@ impl WorkerScheduler for ApiWorkerScheduler {
             .rev()
             .map_while(|(worker_id, worker)| {
                 if worker.last_update_timestamp <= now_timestamp - self.worker_timeout_s {
-                    Some(*worker_id)
+                    Some(worker_id.clone())
                 } else {
                     None
                 }

nativelink-scheduler/src/awaited_action_db/awaited_action.rs

@@ -156,8 +156,8 @@ impl AwaitedAction {
         self.maybe_origin_metadata.as_ref()
     }
 
-    pub(crate) fn worker_id(&self) -> Option<WorkerId> {
-        self.worker_id
+    pub(crate) fn worker_id(&self) -> Option<&WorkerId> {
+        self.worker_id.as_ref()
     }
 
     pub(crate) fn last_worker_updated_timestamp(&self) -> SystemTime {

nativelink-scheduler/src/simple_scheduler_state_manager.rs

@@ -354,7 +354,7 @@ where
             }
         }
 
-        if filter.worker_id.is_some() && filter.worker_id != awaited_action.worker_id() {
+        if filter.worker_id.is_some() && filter.worker_id.as_ref() != awaited_action.worker_id() {
             return false;
         }
 
@@ -500,7 +500,7 @@ where
             // worker that was assigned.
             if awaited_action.worker_id().is_some()
                 && maybe_worker_id.is_some()
-                && maybe_worker_id != awaited_action.worker_id().as_ref()
+                && maybe_worker_id != awaited_action.worker_id()
             {
                 // If another worker is already assigned to the action, another
                 // worker probably picked up the action. We should not update the
@@ -575,7 +575,7 @@ where
                 // which worker sent the update.
                 awaited_action.set_worker_id(None, now);
             } else {
-                awaited_action.set_worker_id(maybe_worker_id.copied(), now);
+                awaited_action.set_worker_id(maybe_worker_id.cloned(), now);
             }
             awaited_action.worker_set_state(
                 Arc::new(ActionState {

nativelink-scheduler/src/worker.rs

@@ -160,7 +160,7 @@ impl Worker {
         send_msg_to_worker(
             &mut self.tx,
             update_for_worker::Update::ConnectionResult(ConnectionResult {
-                worker_id: self.id.to_string(),
+                worker_id: self.id.clone().into(),
             }),
         )
         .err_tip(|| format!("Failed to send ConnectionResult to worker : {}", self.id))
@@ -181,7 +181,7 @@ impl Worker {
 
     pub fn keep_alive(&mut self) -> Result<(), Error> {
         let tx = &mut self.tx;
-        let id = self.id;
+        let id = &self.id;
         self.metrics.keep_alive.wrap(move || {
             send_msg_to_worker(tx, update_for_worker::Update::KeepAlive(()))
                 .err_tip(|| format!("Failed to send KeepAlive to worker : {id}"))
@@ -196,7 +196,7 @@ impl Worker {
         let tx = &mut self.tx;
         let worker_platform_properties = &mut self.platform_properties;
         let running_action_infos = &mut self.running_action_infos;
-        let worker_id = self.id.to_string();
+        let worker_id = self.id.clone().into();
         self.metrics
             .run_action
             .wrap(async move {