[Metricbeat] Add Oracle module (#11890)

Add Metricbeat Oracle Module with a Metricset focused on Tablespaces data.

CHANGELOG.next.asciidoc

@@ -250,6 +250,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Add `beat` module. {pull}12181[12181] {pull}12615[12615]
 - Collect tags for cloudwatch metricset in aws module. {issue}[12263]12263 {pull}12480[12480]
 - Add AWS RDS metricset. {pull}11620[11620] {issue}10054[10054]
+- Add Oracle Module {pull}11890[11890]
 
 *Packetbeat*
 

NOTICE.txt

@@ -3296,6 +3296,239 @@ License type (autodetected): Apache-2.0
 Apache License 2.0
 
 
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 --------------------------------------------------------------------
 Dependency: gopkg.in/inf.v0
 Revision: 3887ee99ecf07df5b447e9b00d9c0b2adaa9f3e4

metricbeat/docs/fields.asciidoc

@@ -52,6 +52,7 @@ grouped in the following categories:
 * <<exported-fields-mysql>>
 * <<exported-fields-nats>>
 * <<exported-fields-nginx>>
+* <<exported-fields-oracle>>
 * <<exported-fields-php_fpm>>
 * <<exported-fields-postgresql>>
 * <<exported-fields-process>>
@@ -22188,6 +22189,143 @@ type: long
 
 --
 
+[[exported-fields-oracle]]
+== Oracle fields
+
+Oracle database module
+
+
+[float]
+=== oracle
+
+Oracle module
+
+
+[float]
+=== tablespace
+
+tablespace
+
+
+*`oracle.tablespace.name`*::
++
+--
+Tablespace name
+
+type: keyword
+
+--
+
+[float]
+=== data_file
+
+Database files information
+
+
+*`oracle.tablespace.data_file.id`*::
++
+--
+Tablespace unique identifier
+
+type: long
+
+--
+
+*`oracle.tablespace.data_file.name`*::
++
+--
+Filename of the data file
+
+type: keyword
+
+--
+
+[float]
+=== size
+
+Size information about the file
+
+
+*`oracle.tablespace.data_file.size.max.bytes`*::
++
+--
+Maximum file size in bytes
+
+type: bytes
+
+--
+
+*`oracle.tablespace.data_file.size.bytes`*::
++
+--
+Size of the file in bytes
+
+type: bytes
+
+--
+
+*`oracle.tablespace.data_file.size.free.bytes`*::
++
+--
+The size of the file available for user data. The actual size of the file minus this value is used to store file related metadata.
+
+
+type: bytes
+
+--
+
+*`oracle.tablespace.data_file.status`*::
++
+--
+'File status: AVAILABLE or INVALID (INVALID means that the file number is not in use, for example, a file in a tablespace that was dropped)'
+
+
+type: keyword
+
+--
+
+*`oracle.tablespace.data_file.online_status`*::
++
+--
+Last known online status of the data file. One of SYSOFF, SYSTEM, OFFLINE, ONLINE or RECOVER.
+
+type: keyword
+
+--
+
+[float]
+=== space
+
+Tablespace space usage information
+
+
+*`oracle.tablespace.space.free.bytes`*::
++
+--
+Tablespace total free space available, in bytes.
+
+type: bytes
+
+--
+
+*`oracle.tablespace.space.used.bytes`*::
++
+--
+Tablespace used space, in bytes.
+
+type: bytes
+
+--
+
+*`oracle.tablespace.space.total.bytes`*::
++
+--
+Tablespace total size, in bytes.
+
+type: bytes
+
+--
+
 [[exported-fields-php_fpm]]
 == PHP_FPM fields