Fix renaming cloud metadata processor fields (elastic#13808)

Clone the underlying metadata to allow renaming sub-fields under cloud that are injected by the cloud metadata processor.
leweafan · Mar 3, 2020 · 3f2565b · 3f2565b
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diff --git a/CHANGELOG.next.asciidoc b/CHANGELOG.next.asciidoc
@@ -46,6 +46,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 
 *Affecting all Beats*
 
+- Fix `add_cloud_metadata` to better support modifying sub-fields with other processors. {pull}13808[13808]
 - TLS or Beats that accept connections over TLS and validate client certificates. {pull}14146[14146]
 - Fix panics that could result from invalid TLS certificates. This can affect Beats that connect over TLS, or Beats that accept connections over TLS and validate client certificates. {pull}14146[14146]
 - Fix panic in the Logstash output when trying to send events to closed connection. {pull}15568[15568]

diff --git a/libbeat/processors/add_cloud_metadata/add_cloud_metadata.go b/libbeat/processors/add_cloud_metadata/add_cloud_metadata.go
@@ -97,7 +97,7 @@ func (p *addCloudMetadata) init() {
 
 func (p *addCloudMetadata) getMeta() common.MapStr {
 	p.init()
-	return p.metadata
+	return p.metadata.Clone()
 }
 
 func (p *addCloudMetadata) Run(event *beat.Event) (*beat.Event, error) {