[YARN-7640] Retrospect to enable CORS related configs by default in YARN

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.0.0-beta1
• Component/s: nodemanager, resourcemanager
• Assignee: Unassigned
• Reporter: Sunil G
• Created: 12/Dec/17 09:46
• Updated: 22/Dec/17 00:05

Description

Currently admin has to do below config changes to enable CORS in YARN.

1. Add org.apache.hadoop.security.HttpCrossOriginFilterInitializer to hadoop.http.filter.initializers
2. Set hadoop.http.cross-origin.enabled to true
3. Set hadoop.http.cross-origin.allowed-methods to GET,HEAD
4. Set yarn.nodemanager.webapp.cross-origin.enabled to true 
5. Set yarn.resourcemanager.webapp.cross-origin.enabled to true

For better handling, we could enable this config by default in YARN.