David Handermann created NIFI-15176:
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             Summary: Add Access Delegation Strategy to REST Iceberg Catalog
                 Key: NIFI-15176
                 URL: https://issues.apache.org/jira/browse/NIFI-15176
             Project: Apache NiFi
          Issue Type: Improvement
          Components: Extensions
            Reporter: David Handermann
            Assignee: David Handermann


The {{RESTIcebergCatalog}} should have an {{Access Delegation Strategy}} 
property that supports requesting vended credentials from the configured Apache 
Iceberg REST Catalog, as described in [version 
1.5.0|https://github.com/apache/iceberg/blob/apache-iceberg-1.5.0/open-api/rest-catalog-open-api.yaml]
 of the Apache Iceberg REST specification.

The {{X-Iceberg-Access-Delegation}} supports several values, and initial 
support for the {{vended-credentials}} option should be implemented as the 
default property value. A value of disabled should also support the option to 
avoid sending the optional request header.



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