add hostname to status

Cargo.lock

@@ -5814,6 +5814,7 @@ dependencies = [
  "handlebars",
  "hashbrown 0.13.2",
  "hdrhistogram",
+ "hostname",
  "http",
  "ipnet",
  "itertools",

web3_proxy/Cargo.toml

@@ -45,6 +45,7 @@ handlebars = "4.3.6"
 hashbrown = { version = "0.13.2", features = ["serde"] }
 hdrhistogram = "7.5.2"
 http = "0.2.9"
+hostname = "0.3.1"
 ipnet = "2.7.1"
 itertools = "0.10.5"
 log = "0.4.17"

web3_proxy/src/app/mod.rs

@@ -44,6 +44,7 @@ use redis_rate_limiter::{redis, DeadpoolRuntime, RedisConfig, RedisPool, RedisRa
 use serde::Serialize;
 use serde_json::json;
 use serde_json::value::to_raw_value;
+use std::ffi::OsString;
 use std::fmt;
 use std::hash::{Hash, Hasher};
 use std::net::IpAddr;
@@ -213,6 +214,7 @@ pub struct Web3ProxyApp {
     pub config: AppConfig,
     pub db_conn: Option<sea_orm::DatabaseConnection>,
     pub db_replica: Option<DatabaseReplica>,
+    pub hostname: Option<OsString>,
     /// store pending transactions that we've seen so that we don't send duplicates to subscribers
     pub pending_transactions: Cache<TxHash, TxStatus, hashbrown::hash_map::DefaultHashBuilder>,
     pub frontend_ip_rate_limiter: Option<DeferredRateLimiter<IpAddr>>,
@@ -694,6 +696,8 @@ impl Web3ProxyApp {
             Some(private_rpcs)
         };
 
+        let hostname = hostname::get().ok();
+
         let app = Self {
             config: top_config.app.clone(),
             balanced_rpcs,
@@ -709,6 +713,7 @@ impl Web3ProxyApp {
             login_rate_limiter,
             db_conn,
             db_replica,
+            hostname,
             vredis_pool,
             rpc_secret_key_cache,
             bearer_token_semaphores,

web3_proxy/src/frontend/status.rs

@@ -40,11 +40,13 @@ pub async fn status(
     let body = response_cache
         .get_with(FrontendResponseCaches::Status, async {
             // TODO: what else should we include? uptime, cache hit rates, cpu load, memory used
+            // TODO: the hostname is probably not going to change. only get once at the start?
             let body = json!({
                 "version": APP_USER_AGENT,
                 "chain_id": app.config.chain_id,
                 "balanced_rpcs": app.balanced_rpcs,
                 "private_rpcs": app.private_rpcs,
+                "hostname": app.hostname,
             });
 
             Arc::new(body)