Add Host metadataedit

This functionality is in beta and is subject to change. The design and code is less mature than official GA features and is being provided as-is with no warranties. Beta features are not subject to the support SLA of official GA features.

processors:
- add_host_metadata:
    netinfo.enabled: false
    cache.ttl: 5m
    geo:
      name: nyc-dc1-rack1
      location: 40.7128, -74.0060
      continent_name: North America
      country_iso_code: US
      region_name: New York
      region_iso_code: NY
      city_name: New York

It has the following settings:

netinfo.enabled
(Optional) Default false. Include IP addresses and MAC addresses as fields host.ip and host.mac
cache.ttl
(Optional) The processor uses an internal cache for the host metadata. This sets the cache expiration time. The default is 5m, negative values disable caching altogether.
geo.name
User definable token to be used for identifying a discrete location. Frequently a datacenter, rack, or similar.
geo.location
Longitude and latitude in comma separated format.
geo.continent_name
Name of the continent.
geo.country_name
Name of the country.
geo.region_name
Name of the region.
geo.city_name
Name of the city.
geo.country_iso_code
ISO country code.
geo.region_iso_code
ISO region code.

The add_host_metadata processor annotates each event with relevant metadata from the host machine. The fields added to the event look like the following:

{
   "host":{
      "architecture":"x86_64",
      "name":"example-host",
      "id":"",
      "os":{
         "family":"darwin",
         "build":"16G1212",
         "platform":"darwin",
         "version":"10.12.6",
         "kernel":"16.7.0",
         "name":"Mac OS X"
      },
      "ip": ["192.168.0.1", "10.0.0.1"],
      "mac": ["00:25:96:12:34:56", "72:00:06:ff:79:f1"],
      "geo": {
          "continent_name": "North America",
          "country_iso_code": "US",
          "region_name": "New York",
          "region_iso_code": "NY",
          "city_name": "New York",
          "name": "nyc-dc1-rack1",
          "location": "40.7128, -74.0060"
        }
   }
}