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Posted to common-issues@hadoop.apache.org by "Wei-Chiu Chuang (JIRA)" <ji...@apache.org> on 2016/08/09 00:25:20 UTC
[jira] [Updated] (HADOOP-13190) LoadBalancingKMSClientProvider
should be documented
[ https://issues.apache.org/jira/browse/HADOOP-13190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wei-Chiu Chuang updated HADOOP-13190:
-------------------------------------
Attachment: HADOOP-13190.002.patch
Thanks [~xiaochen] for reviewing the patch.
bq. Maybe we can change the current $H3 level title to Using Multiple Instances of KMS, and list the current LB/VIP and the new LBKMSCP under it? The other sub-sections (kerberos, secret-sharing) applies to multiple instances in general.
Good idea.
bq. In the new LBKMSCP section, please also add the failure-handling behavior. If a request to a KMSCP failed, LBKMSCP will retry the next KMSCP. The request is returned as failure only if all KMSCPs failed.
Done.
bq. In the sample xml, maybe also list an http example?
Not sure how to best capture this. I found the section _KMS Client Configuration_ is vague, so I put up an example of configuring NameNode as a KMS client here.
> LoadBalancingKMSClientProvider should be documented
> ---------------------------------------------------
>
> Key: HADOOP-13190
> URL: https://issues.apache.org/jira/browse/HADOOP-13190
> Project: Hadoop Common
> Issue Type: Improvement
> Components: documentation, kms
> Affects Versions: 2.7.0
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Labels: supportability
> Attachments: HADOOP-13190.001.patch, HADOOP-13190.002.patch
>
>
> Currently, there are two ways to achieve KMS HA.
> The first one, and the only documented one, is running multiple KMS instances behind a load balancer. https://hadoop.apache.org/docs/stable/hadoop-kms/index.html
> The other way, is make use of LoadBalancingKMSClientProvider which is added in HADOOP-11620. However the usage is undocumented.
> I think we should update the KMS document to introduce LoadBalancingKMSClientProvider, provide examples, and also update kms-site.xml to explain it.
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