From f66929bf5bd7ee0cc25ae58eb65c11f2db607997 Mon Sep 17 00:00:00 2001
From: Kenji Okimoto <okimoto@clear-code.com>
Date: Thu, 13 Sep 2018 17:06:23 +0900
Subject: [PATCH] Fix label handling while validation

Signed-off-by: Kenji Okimoto <okimoto@clear-code.com>
---
 app/models/concerns/fluentd/setting/plugin_config.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/app/models/concerns/fluentd/setting/plugin_config.rb b/app/models/concerns/fluentd/setting/plugin_config.rb
index 3d82c91..22fe9f9 100644
--- a/app/models/concerns/fluentd/setting/plugin_config.rb
+++ b/app/models/concerns/fluentd/setting/plugin_config.rb
@@ -10,7 +10,12 @@ class Fluentd
       def validate_configuration
         original_log = $log
         $log = DummyLogger.logger
-        config = to_config.to_s.lines[1..-2].join
+        full_config = to_config.to_s
+        config = if full_config.start_with?("<label ")
+                   full_config.lines[2..-3].join
+                 else
+                   full_config.lines[1..-2].join
+                 end
         self.class.create_driver(config)
       rescue Fluent::ConfigError => ex
         errors.add(:base, :invalid, message: ex.message)