[jira] [Created] (HDFS-11210) Enhance key rolling to be atomic

["Xiao Chen (JIRA)" <ji...@apache.org>]

Xiao Chen created HDFS-11210:
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             Summary: Enhance key rolling to be atomic
                 Key: HDFS-11210
                 URL: https://issues.apache.org/jira/browse/HDFS-11210
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: encryption, kms
    Affects Versions: 2.6.5
            Reporter: Xiao Chen
            Assignee: Xiao Chen


To support re-encrypting EDEK, we need to make sure after a key is rolled, no old version EDEKs are used anymore. This includes various caches when generating EDEK.
This is not true currently, simply because no such requirements / necessities before.

This includes
- Client Provider(s), and corresponding cache(s).
When LoadBalancingKMSCP is used, we need to clear all KMSCPs.
- KMS server instance(s), and corresponding cache(s)
When KMS HA is configured with multiple KMS instances, only 1 will receive the {{rollNewVersion}} request, we need to make sure other instances are rolled too.
- The Client instance inside NN(s), and corresponding cache(s)
When {{hadoop key roll}} is succeeded, the client provider inside NN should be drained too.



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