envoyproxy server MetricSet

{
  "@timestamp": "2018-07-06T14:01:31.031Z",
  "beat":{
	"hostname":"beathost",
	"name":"beathost"
	},
  "metricset":{
	"host":"localhost",
	"module":"envoyproxy",
	"name":"server",
	"rtt":44269
    },
  "envoyproxy": {
    "server": {
      "filesystem": {
        "write_buffered": 30,
        "write_completed": 29,
        "write_total_buffered": 0,
        "flushed_by_timer": 311,
        "reopen_failed": 0
      },
      "runtime": {
        "override_dir_not_exists": 0,
        "admin_overrides_active": 0,
        "load_error": 0,
        "load_success": 0,
        "num_keys": 0,
        "override_dir_exists": 0
      },
      "listener_manager": {
        "listener_modified": 0,
        "listener_removed": 0,
        "total_listeners_active": 1,
        "total_listeners_draining": 0,
        "total_listeners_warming": 0,
        "listener_added": 1,
        "listener_create_failure": 0,
        "listener_create_success": 4
      },
      "stats": {
        "overflow": 0
      },
      "server": {
        "version": 4151803,
        "memory_allocated": 3170848,
        "watchdog_miss": 0,
        "uptime": 3146,
        "watchdog_mega_miss": 0,
        "hot_restart_epoch": 0,
        "days_until_first_cert_expiring": 2147483647,
        "live": 1,
        "memory_heap_size": 4194304,
        "parent_connections": 0,
        "total_connections": 0
      },
      "http2": {
	    "header_overflow":0,
	    "headers_cb_no_stream":0,
	    "rx_reset":0,
	    "too_many_header_frames":0,
	    "trailers":0,
	    "tx_reset":0
	  },
      "cluster_manager": {
        "active_clusters": 1,
        "cluster_added": 1,
        "cluster_modified": 0,
        "cluster_removed": 0,
        "warming_clusters": 0
      }
    }
  },
  "type":"metricsets"
}