Merge pull request #28841 from redpanda-data/stephan/backport-http-keepalive

[v25.2.x] http: Add TCP keepalive to http APIs

Author: StephanDollberg

MODULE.bazel.lock

@@ -162,9 +162,9 @@ def data_dependency():
     http_archive(
         name = "seastar",
         build_file = "//bazel/thirdparty:seastar.BUILD",
-        sha256 = "4665a3f117c47e830e819e7b1184ace9f701d20487817f0c46e124b7b62750ba",
-        strip_prefix = "seastar-737485d4e702a447c310e804cc9bfc57cb7c60cf",
-        url = "https://github.com/redpanda-data/seastar/archive/737485d4e702a447c310e804cc9bfc57cb7c60cf.tar.gz",
+        sha256 = "b8a902653fd02625106a43e5493f1fadec78407cf0f3b99db565e4ea9404d833",
+        strip_prefix = "seastar-77ef0a4474248c746b977b2e4b5d23bb32a905d0",
+        url = "https://github.com/redpanda-data/seastar/archive/77ef0a4474248c746b977b2e4b5d23bb32a905d0.tar.gz",
     )
 
     http_archive(

bazel/repositories.bzl

@@ -212,6 +212,11 @@ server::server(
     _api20.register_api_file(_server._routes, header);
     _api20.add_definitions_file(_server._routes, definitions);
     _server.set_content_streaming(true);
+    _server.set_keepalive_parameters(ss::net::tcp_keepalive_params{
+      .idle = std::chrono::seconds{120},
+      .interval = std::chrono::seconds{60},
+      .count = 3,
+    });
 }
 
 /*

src/v/pandaproxy/server.cc

@@ -338,6 +338,11 @@ admin_server::admin_server(
   , _default_blocked_reactor_notify(
       ss::engine().get_blocked_reactor_notify_ms()) {
     _server.set_content_streaming(true);
+    _server.set_keepalive_parameters(ss::net::tcp_keepalive_params{
+      .idle = std::chrono::seconds{120},
+      .interval = std::chrono::seconds{60},
+      .count = 3,
+    });
 }
 
 ss::future<> admin_server::start() {