Convert Filebeat haproxy.log to ECS (elastic#9117)

- Convert many fields under `haproxy.*` to ECS. Previous field names are field aliases towards the new corresponding ECS field:
  - haproxy.client.port => source.port
  - haproxy.process_name => process.name
  - haproxy.pid => process.pid
  - haproxy.destination.ip => destination.ip
  - haproxy.destination.port => destination.port
- Convert pid and ports to integers in the event body. They used to be strings.

CHANGELOG.asciidoc

@@ -126,6 +126,7 @@ https://github.com/elastic/beats/compare/v6.5.0...v7.0.0-alpha1[View commits]
 - Rename many `system.syslog.*` fields to map to ECS. {pull}9135[9135]
 - Rename many `iis.access.*` fields to map to ECS. {pull}9084[9084]
 - IIS module's user agent string is no longer encoded (`+` replaced with spaces). {pull}9084[9084]
+- Rename many `haproxy.*` fields to map to ECS. {pull}9117[9117]
 
 *Metricbeat*
 

dev-tools/ecs-migration.yml

@@ -197,3 +197,58 @@
   to: http.request.referrer
   alias: true
   copy_to: false
+
+- from: haproxy.client.port
+  to: source.port
+  alias: true
+  copy_to: false
+
+- from: haproxy.process_name
+  to: process.name
+  alias: true
+  copy_to: false
+
+- from: haproxy.pid
+  to: process.pid
+  alias: true
+  copy_to: false
+
+- from: haproxy.destination.ip
+  to: destination.ip
+  alias: true
+  copy_to: false
+
+- from: haproxy.destination.port
+  to: destination.port
+  alias: true
+  copy_to: false
+
+- from: haproxy.geoip.continent_name
+  to: source.geo.continent_name
+  alias: true
+  copy_to: false
+
+- from: haproxy.geoip.country_iso_code
+  to: source.geo.country_iso_code
+  alias: true
+  copy_to: false
+
+- from: haproxy.geoip.location
+  to: source.geo.location
+  alias: true
+  copy_to: false
+
+- from: haproxy.geoip.region_name
+  to: source.geo.region_name
+  alias: true
+  copy_to: false
+
+- from: haproxy.geoip.city_name
+  to: source.geo.city_name
+  alias: true
+  copy_to: false
+
+- from: haproxy.geoip.region_iso_code
+  to: source.geo.region_iso_code
+  alias: true
+  copy_to: false

filebeat/docs/fields.asciidoc

@@ -3393,66 +3393,6 @@ haproxy Module
 
 
 
-[float]
-== destination fields
-
-Destination information
-
-
-*`haproxy.destination.port`*::
-+
---
-type: long
-
-Port of the destination host
-
---
-
-*`haproxy.destination.ip`*::
-+
---
-IP of the destination host
-
---
-
-*`haproxy.process_name`*::
-+
---
-Name of the process
-
---
-
-*`haproxy.pid`*::
-+
---
-type: long
-
-PID of the process
-
---
-
-[float]
-== client fields
-
-Information about the client doing the request
-
-
-*`haproxy.client.ip`*::
-+
---
-IP address of the client which initiated the TCP connection to haproxy.
-
---
-
-*`haproxy.client.port`*::
-+
---
-type: long
-
-TCP port of the client which initiated the connection.
-
---
-
 *`haproxy.frontend_name`*::
 +
 --
@@ -3562,131 +3502,175 @@ The HAProxy source of the log
 
 --
 
+*`haproxy.termination_state`*::
++
+--
+Condition the session was in when the session ended.
+
+--
+
+*`haproxy.mode`*::
++
+--
+type: text
+
+mode that the frontend is operating (TCP or HTTP)
+
+--
+
 [float]
-== geoip fields
+== connections fields
+
+Contains various counts of connections active in the process.
 
-Contains GeoIP information gathered based on the client.ip field. Only present if the GeoIP Elasticsearch plugin is available and used.
 
+*`haproxy.connections.active`*::
++
+--
+type: long
+
+Total number of concurrent connections on the process when the session was logged.
 
+--
 
-*`haproxy.geoip.continent_name`*::
+*`haproxy.connections.frontend`*::
 +
 --
-type: keyword
+type: long
 
-Name of the continent.
+Total number of concurrent connections on the frontend when the session was logged.
 
 --
 
-*`haproxy.geoip.country_iso_code`*::
+*`haproxy.connections.backend`*::
 +
 --
-type: keyword
+type: long
 
-Country ISO code.
+Total number of concurrent connections handled by the backend when the session was logged.
 
 --
 
-*`haproxy.geoip.location`*::
+*`haproxy.connections.server`*::
 +
 --
-type: geo_point
+type: long
 
-Represents a geopoint with the longitude and latitude.
+Total number of concurrent connections still active on the server when the session was logged.
 
 --
 
-*`haproxy.geoip.region_name`*::
+*`haproxy.connections.retries`*::
 +
 --
-type: keyword
+type: long
 
-Name of the region
+Number of connection retries experienced by this session when trying to connect to the server.
 
 --
 
-*`haproxy.geoip.city_name`*::
+[float]
+== client fields
+
+Information about the client doing the request
+
+
+*`haproxy.client.ip`*::
 +
 --
-type: keyword
+IP address of the client which initiated the TCP connection to haproxy.
+If connection is via unix socket, socket path is in this field.
 
-City name.
 
 --
 
-*`haproxy.geoip.region_iso_code`*::
+*`source.port`*::
 +
 --
-type: keyword
+type: alias
+
+--
 
-ISO code of the region
+*`process.name`*::
++
+--
+type: alias
 
 --
 
-*`haproxy.termination_state`*::
+*`process.pid`*::
 +
 --
-Condition the session was in when the session ended.
+type: alias
 
 --
 
 [float]
-== connections fields
+== destination fields
 
-Contains various counts of connections active in the process.
+Destination information
 
 
-*`haproxy.connections.active`*::
+*`destination.port`*::
 +
 --
-type: long
-
-Total number of concurrent connections on the process when the session was logged.
+type: alias
 
 --
 
-*`haproxy.connections.frontend`*::
+*`destination.ip`*::
 +
 --
-type: long
-
-Total number of concurrent connections on the frontend when the session was logged.
+type: alias
 
 --
 
-*`haproxy.connections.backend`*::
+[float]
+== geoip fields
+
+Contains GeoIP information gathered based on the client.ip field. Only present if the GeoIP Elasticsearch plugin is available and used.
+
+
+
+*`source.geo.continent_name`*::
 +
 --
-type: long
-
-Total number of concurrent connections handled by the backend when the session was logged.
+type: alias
 
 --
 
-*`haproxy.connections.server`*::
+*`source.geo.country_iso_code`*::
 +
 --
-type: long
-
-Total number of concurrent connections still active on the server when the session was logged.
+type: alias
 
 --
 
-*`haproxy.connections.retries`*::
+*`source.geo.location`*::
 +
 --
-type: long
+type: alias
 
-Number of connection retries experienced by this session when trying to connect to the server.
+--
 
+*`source.geo.region_name`*::
++
 --
+type: alias
 
-*`haproxy.mode`*::
+--
+
+*`source.geo.city_name`*::
 +
 --
-type: text
+type: alias
 
-mode that the frontend is operating (TCP or HTTP)
+--
+
+*`source.geo.region_iso_code`*::
++
+--
+type: alias
 
 --