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https://issues.apache.org/jira/browse/HADOOP-11336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang resolved HADOOP-11336.
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Resolution: Not A Bug
Resolving this as not a bug. KMS supports HA natively.
> Native support of KMS High Availability and Scalability
> -------------------------------------------------------
>
> Key: HADOOP-11336
> URL: https://issues.apache.org/jira/browse/HADOOP-11336
> Project: Hadoop Common
> Issue Type: Improvement
> Components: kms
> Affects Versions: trunk-win
> Reporter: Haifeng Chen
> Assignee: Dian Fu
> Priority: Major
> Labels: Security
> Original Estimate: 672h
> Remaining Estimate: 672h
>
> Currently, KMS supports multiple KMS instances behind a load balancer or VIP
> for scalability and HA purposes. A lot of extra configurations and cares must
> be taken to make them work properly as a single logical service.
> Especially when Kerberos authentication is used, special care must be taken
> on the service principles. (When KMS is used, strong authentication is very
> important to key security)
> It would be ideal to provide a native solution in KMS server and KMS client
> to support KMS high availability and scalability. This would make the
> deployment of HA and scalable KMS more straightforward as well as saving the
> cost of a specific load balancer and maintenance.
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