Adding Varnish HTTP Cache input plugin

Author: sfox-xmatters

etc/telegraf.conf

@@ -1505,3 +1505,13 @@
 #   ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
 #   data_format = "influx"
 
+# a plugin to collect stats from varnish
+# [[inputs.varnish]]
+#  ## The default location of the varnishstat binary can be overridden with:
+#  binary = "/usr/bin/varnishstat"
+#
+#  ## By default, telegraf gather stats for 3 metric points.
+#  ## Setting stats will override the defaults (["MAIN.cache_hit","MAIN.cache_miss","MAIN.uptime"]).
+#  ## stats may also be set to ["all"], which will collect all stats
+#  stats = ["MAIN.cache_hit","MAIN.cache_miss","MAIN.uptime"]
+

plugins/inputs/all/all.go

@@ -61,6 +61,7 @@ import (
 	_ "github.com/influxdata/telegraf/plugins/inputs/trig"
 	_ "github.com/influxdata/telegraf/plugins/inputs/twemproxy"
 	_ "github.com/influxdata/telegraf/plugins/inputs/udp_listener"
+	_ "github.com/influxdata/telegraf/plugins/inputs/varnish"
 	_ "github.com/influxdata/telegraf/plugins/inputs/win_perf_counters"
 	_ "github.com/influxdata/telegraf/plugins/inputs/zfs"
 	_ "github.com/influxdata/telegraf/plugins/inputs/zookeeper"