From d8b8bc6ad4aec438eba96a695a59266be03bcc34 Mon Sep 17 00:00:00 2001
From: Yuta Iwama <ganmacs@gmail.com>
Date: Mon, 6 Jan 2020 13:59:33 +0900
Subject: [PATCH] Add rpc endpoint to do light reload

Signed-off-by: Yuta Iwama <ganmacs@gmail.com>
---
 lib/fluent/supervisor.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/fluent/supervisor.rb b/lib/fluent/supervisor.rb
index 5a3f4dc1ec..aced0cc3b7 100644
--- a/lib/fluent/supervisor.rb
+++ b/lib/fluent/supervisor.rb
@@ -122,6 +122,15 @@ def run_rpc_server
         nil
       }
 
+      @rpc_server.mount_proc('/api/config.gracefulReload') { |req, res|
+        $log.debug "fluentd RPC got /api/config.gracefulReload request"
+        unless Fluent.windows?
+          Process.kill :USR2, $$
+        end
+
+        nil
+      }
+
       @rpc_server.mount_proc('/api/config.getDump') { |req, res|
         $log.debug "fluentd RPC got /api/config.getDump request"
         $log.info "get dump in-memory config via HTTP"