Set default values for delete_ configuration options

closes influxdata#1893

CHANGELOG.md

@@ -41,6 +41,10 @@ of the statsd plugin. Saving state on reload may be considered in the future,
 but this would need to be implemented at a higher level and applied to all
 plugins, not just statsd.
 
+- The StatsD plugin will now default all "delete_" config options to "true". This
+will change te default behavior for users who were not specifying these parameters
+in their config file.
+
 ### Features
 
 - [#2123](https://github.com/influxdata/telegraf/pull/2123): Fix improper calculation of CPU percentages
@@ -58,6 +62,7 @@ plugins, not just statsd.
 - [#1908](https://github.com/influxdata/telegraf/pull/1908): RabbitMQ Connection metrics.
 - [#1937](https://github.com/influxdata/telegraf/pull/1937): HAProxy session limit metric.
 - [#2068](https://github.com/influxdata/telegraf/issues/2068): Accept strings for StatsD sets.
+- [#1893](https://github.com/influxdata/telegraf/issues/1893): Change StatsD default "reset" behavior.
 
 ### Bugfixes
 

plugins/inputs/statsd/README.md

@@ -7,14 +7,19 @@
 [[inputs.statsd]]
   ## Address and port to host UDP listener on
   service_address = ":8125"
-  ## Delete gauges every interval (default=false)
-  delete_gauges = false
-  ## Delete counters every interval (default=false)
-  delete_counters = false
-  ## Delete sets every interval (default=false)
-  delete_sets = false
-  ## Delete timings & histograms every interval (default=true)
+
+  ## The following configuration options control when telegraf clears it's cache
+  ## of previous values. If set to false, then telegraf will only clear it's
+  ## cache when the daemon is restarted.
+  ## Reset gauges every interval (default=true)
+  delete_gauges = true
+  ## Reset counters every interval (default=true)
+  delete_counters = true
+  ## Reset sets every interval (default=true)
+  delete_sets = true
+  ## Reset timings & histograms every interval (default=true)
   delete_timings = true
+
   ## Percentiles to calculate for timing & histogram stats
   percentiles = [90]
 

plugins/inputs/statsd/statsd.go

@@ -136,14 +136,19 @@ func (_ *Statsd) Description() string {
 const sampleConfig = `
   ## Address and port to host UDP listener on
   service_address = ":8125"
-  ## Delete gauges every interval (default=false)
-  delete_gauges = false
-  ## Delete counters every interval (default=false)
-  delete_counters = false
-  ## Delete sets every interval (default=false)
-  delete_sets = false
-  ## Delete timings & histograms every interval (default=true)
+
+  ## The following configuration options control when telegraf clears it's cache
+  ## of previous values. If set to false, then telegraf will only clear it's
+  ## cache when the daemon is restarted.
+  ## Reset gauges every interval (default=true)
+  delete_gauges = true
+  ## Reset counters every interval (default=true)
+  delete_counters = true
+  ## Reset sets every interval (default=true)
+  delete_sets = true
+  ## Reset timings & histograms every interval (default=true)
   delete_timings = true
+
   ## Percentiles to calculate for timing & histogram stats
   percentiles = [90]
 
@@ -654,8 +659,13 @@ func (s *Statsd) Stop() {
 func init() {
 	inputs.Add("statsd", func() telegraf.Input {
 		return &Statsd{
+			ServiceAddress:         ":8125",
 			MetricSeparator:        "_",
 			AllowedPendingMessages: defaultAllowPendingMessage,
+			DeleteCounters:         true,
+			DeleteGauges:           true,
+			DeleteSets:             true,
+			DeleteTimings:          true,
 		}
 	})
 }