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Factor out health status checks to own service
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| // Copyright 2024 The NativeLink Authors. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| use std::sync::Arc; | ||
|
|
||
| use async_lock::{Mutex as AsyncMutex, MutexGuard}; | ||
| use futures::StreamExt; | ||
| use hyper::{Response, StatusCode}; | ||
| use nativelink_error::Error; | ||
| use nativelink_util::health_utils::{ | ||
| HealthRegistryBuilder, HealthStatus, HealthStatusDescription, HealthStatusReporter, | ||
| }; | ||
|
|
||
| /// Content type header value for JSON. | ||
| const JSON_CONTENT_TYPE: &str = "application/json; charset=utf-8"; | ||
|
|
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| #[derive(Clone)] | ||
| pub struct HealthServer { | ||
| health_registry_builder: Arc<AsyncMutex<HealthRegistryBuilder>>, | ||
| } | ||
|
|
||
| impl HealthServer { | ||
| pub async fn new(namespace: &str) -> Result<Self, Error> { | ||
| let namespace = namespace.to_string(); | ||
| let health_registry_builder = Arc::new(AsyncMutex::new(HealthRegistryBuilder::new( | ||
| namespace.into(), | ||
| ))); | ||
|
|
||
| Ok(HealthServer { | ||
| health_registry_builder, | ||
| }) | ||
| } | ||
|
|
||
| pub async fn get_health_registry(&self) -> Result<MutexGuard<HealthRegistryBuilder>, Error> { | ||
| let health_registry_lock = self.health_registry_builder.lock().await; | ||
| Ok(health_registry_lock) | ||
| } | ||
|
|
||
| pub async fn check_health_status(&self) -> Response<String> { | ||
| let health_registry_status = self.get_health_registry().await.unwrap().build(); | ||
| let health_status_descriptions: Vec<HealthStatusDescription> = health_registry_status | ||
| .health_status_report() | ||
| .collect() | ||
| .await; | ||
|
|
||
| match serde_json5::to_string(&health_status_descriptions) { | ||
| Ok(body) => { | ||
| let contains_failed_report = health_status_descriptions | ||
| .iter() | ||
| .any(|description| matches!(description.status, HealthStatus::Failed { .. })); | ||
| let status_code = if contains_failed_report { | ||
| StatusCode::SERVICE_UNAVAILABLE | ||
| } else { | ||
| StatusCode::OK | ||
| }; | ||
|
|
||
| Response::builder() | ||
| .status(status_code) | ||
| .header( | ||
| hyper::header::CONTENT_TYPE, | ||
| hyper::header::HeaderValue::from_static(JSON_CONTENT_TYPE), | ||
| ) | ||
| .body(body) | ||
| .unwrap() | ||
| } | ||
|
|
||
| Err(e) => Response::builder() | ||
| .status(StatusCode::INTERNAL_SERVER_ERROR) | ||
| .header( | ||
| hyper::header::CONTENT_TYPE, | ||
| hyper::header::HeaderValue::from_static(JSON_CONTENT_TYPE), | ||
| ) | ||
| .body(format!("Internal Failure: {e:?}")) | ||
| .unwrap(), | ||
| } | ||
| } | ||
| } |
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