http2

Author: Shubham8287

Cargo.toml

@@ -158,7 +158,7 @@ anymap = "0.12"
 arrayvec = "0.7.2"
 async-stream = "0.3.6"
 async-trait = "0.1.68"
-axum = { version = "0.7", features = ["tracing"] }
+axum = { version = "0.7", features = ["tracing", "http2"] }
 axum-extra = { version = "0.9", features = ["typed-header"] }
 backtrace = "0.3.66"
 base64 = "0.21.2"

crates/core/src/replica_context.rs

@@ -68,12 +68,16 @@ pub struct ReplicaContext {
 
 impl ReplicaContext {
     /// Build a warmed `reqwest::Client` from `config`.
+    ///
+    /// Uses HTTP/2 prior knowledge (h2c) for all connections.
+    /// The server must be configured to accept h2c (HTTP/2 cleartext) connections.
     pub fn new_call_reducer_client(config: &CallReducerOnDbConfig) -> reqwest::Client {
         reqwest::Client::builder()
             .tcp_keepalive(config.tcp_keepalive)
             .pool_idle_timeout(config.pool_idle_timeout)
             .pool_max_idle_per_host(config.pool_max_idle_per_host)
             .timeout(config.request_timeout)
+            .http2_prior_knowledge()
             .build()
             .expect("failed to build call_reducer_on_db HTTP client")
     }