Fix for tags in the config not being applied to the agent.

fixes #302
closes #308

CHANGELOG.md

@@ -48,6 +48,7 @@ of metrics collected and from how many plugins.
 - [#264](https://github.com/influxdb/telegraf/issues/264): logrotate config file fixes. Thanks @linsomniac!
 - [#290](https://github.com/influxdb/telegraf/issues/290): Fix some plugins sending their values as strings.
 - [#289](https://github.com/influxdb/telegraf/issues/289): Fix accumulator panic on nil tags.
+- [#302](https://github.com/influxdb/telegraf/issues/302): Fix `[tags]` getting applied, thanks @gotyaoi!
 
 ## v0.1.9 [2015-09-22]
 

config.go

@@ -21,7 +21,7 @@ import (
 // specified
 type Config struct {
 	// This lives outside the agent because mergeStruct doesn't need to handle maps normally.
-	// We just copy the elements manually in applyAgent.
+	// We just copy the elements manually in ApplyAgent.
 	Tags map[string]string
 
 	agent                *Agent
@@ -129,11 +129,11 @@ func (c *Config) ApplyOutput(name string, v interface{}) error {
 // Overrides only values in the given struct that were set in the config.
 func (c *Config) ApplyAgent(a *Agent) error {
 	if c.agent != nil {
-		return mergeStruct(a, c.agent, c.agentFieldsSet)
-	}
 		for key, value := range c.Tags {
 			a.Tags[key] = value
 		}
+		return mergeStruct(a, c.agent, c.agentFieldsSet)
+	}
 
 	return nil
 }

config_test.go

@@ -142,7 +142,6 @@ func (s *MergeStructSuite) TestFullMerge() {
 		s.T().Error(err)
 	}
 	s.Equal(result, s.FullStruct, fmt.Sprintf("Full merge of %v onto FullStruct failed.", s.AnotherFullStruct))
-	s.T().Log("hi")
 }
 
 func (s *MergeStructSuite) TestPartialMergeWithoutSlices() {