Allow to override sumo client header value

lib/fluent/plugin/out_sumologic.rb

@@ -7,8 +7,9 @@ class SumologicConnection
 
   attr_reader :http
 
-  def initialize(endpoint, verify_ssl, connect_timeout, proxy_uri, disable_cookies)
+  def initialize(endpoint, verify_ssl, connect_timeout, proxy_uri, disable_cookies, sumo_client)
     @endpoint = endpoint
+    @sumo_client = sumo_client
     create_http_client(verify_ssl, connect_timeout, proxy_uri, disable_cookies)
   end
 
@@ -24,7 +25,7 @@ def request_headers(source_host, source_category, source_name, data_type, metric
         'X-Sumo-Name'     => source_name,
         'X-Sumo-Category' => source_category,
         'X-Sumo-Host'     => source_host,
-        'X-Sumo-Client'   => 'fluentd-output'
+        'X-Sumo-Client'   => @sumo_client,
     }
     if data_type == 'metrics'
       case metric_data_format
@@ -89,6 +90,8 @@ class Fluent::Plugin::Sumologic < Fluent::Plugin::Output
   # https://help.sumologic.com/Manage/Fields
   desc 'Fields string (eg "cluster=payment, service=credit_card") which is going to be added to every record.'
   config_param :custom_fields, :string, :default => nil
+  desc 'Name of sumo client which is send as X-Sumo-Client header'
+  config_param :sumo_client, :string, :default => 'fluentd-output'
 
   config_section :buffer do
     config_set_default :@type, DEFAULT_BUFFER_TYPE
@@ -136,7 +139,19 @@ def configure(conf)
       conf['custom_fields'] = nil
     end
 
-    @sumo_conn = SumologicConnection.new(conf['endpoint'], conf['verify_ssl'], conf['open_timeout'].to_i, conf['proxy_uri'], conf['disable_cookies'])
+    # For some reason default is set incorrectly in unit-tests
+    if conf['sumo_client'].nil? || conf['sumo_client'].strip.length == 0
+      conf['sumo_client'] = 'fluentd-output'
+    end
+
+    @sumo_conn = SumologicConnection.new(
+      conf['endpoint'],
+      conf['verify_ssl'],
+      conf['open_timeout'].to_i,
+      conf['proxy_uri'],
+      conf['disable_cookies'],
+      conf['sumo_client']
+      )
     super
   end
 

test/plugin/test_out_sumologic.rb

@@ -72,6 +72,7 @@ def test_default_configure
     assert_equal instance.timestamp_key, 'timestamp'
     assert_equal instance.proxy_uri, nil
     assert_equal instance.disable_cookies, false
+    assert_equal instance.sumo_client, 'fluentd-output'
   end
 
   def test_emit_text
@@ -95,6 +96,28 @@ def test_emit_text
                      times:1
   end
 
+  def test_emit_text_custom_sumo_client
+    config = %{
+      endpoint        https://collectors.sumologic.com/v1/receivers/http/1234
+      log_format      text
+      source_category test
+      source_host     test
+      source_name     test
+      sumo_client     'fluentd-custom-sender'
+
+    }
+    driver = create_driver(config)
+    time = event_time
+    stub_request(:post, 'https://collectors.sumologic.com/v1/receivers/http/1234')
+    driver.run do
+      driver.feed("output.test", time, {'foo' => 'bar', 'message' => 'test'})
+    end
+    assert_requested :post, "https://collectors.sumologic.com/v1/receivers/http/1234",
+                     headers: {'X-Sumo-Category'=>'test', 'X-Sumo-Client'=>'fluentd-custom-sender', 'X-Sumo-Host'=>'test', 'X-Sumo-Name'=>'test'},
+                     body: "test",
+                     times:1
+  end
+
   def test_emit_json
     config = %{
       endpoint        https://collectors.sumologic.com/v1/receivers/http/1234