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From "Ajay Kumar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14445) Delegation tokens are not shared between KMS instances
Date Thu, 26 Jul 2018 20:32:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16558856#comment-16558856
] 

Ajay Kumar commented on HADOOP-14445:
-------------------------------------

[~xiaochen] thanks for working on this important missing functionality for KMS. Patch v15
LGTM. Few minor comments:
# KMSClientProvider#renew Shall we consolidate kerProvider retrievel in single function? We
can call {{createKeyProviderFromTokenService}} from {{KMSUtil.createKeyProvider}}.We can move
the debug statement there as well.
# KMSClientProvider#cancel: same as above
# TestLoadBalancingKMSClientProvider: To test failure in KMS HA shall we add another test
case to call testLoadBalancingWithFailure with KMS_CLIENT_TOKEN_USE_URI_FORMAT_KEY set to
true?

> Delegation tokens are not shared between KMS instances
> ------------------------------------------------------
>
>                 Key: HADOOP-14445
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14445
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: kms
>    Affects Versions: 2.8.0, 3.0.0-alpha1
>         Environment: CDH5.7.4, Kerberized, SSL, KMS-HA, at rest encryption
>            Reporter: Wei-Chiu Chuang
>            Assignee: Xiao Chen
>            Priority: Major
>         Attachments: HADOOP-14445-branch-2.8.002.patch, HADOOP-14445-branch-2.8.patch,
HADOOP-14445.002.patch, HADOOP-14445.003.patch, HADOOP-14445.004.patch, HADOOP-14445.05.patch,
HADOOP-14445.06.patch, HADOOP-14445.07.patch, HADOOP-14445.08.patch, HADOOP-14445.09.patch,
HADOOP-14445.10.patch, HADOOP-14445.11.patch, HADOOP-14445.12.patch, HADOOP-14445.13.patch,
HADOOP-14445.14.patch, HADOOP-14445.15.patch, HADOOP-14445.branch-2.000.precommit.patch, HADOOP-14445.branch-2.001.precommit.patch,
HADOOP-14445.branch-2.01.patch, HADOOP-14445.branch-2.02.patch, HADOOP-14445.branch-2.03.patch,
HADOOP-14445.branch-2.04.patch, HADOOP-14445.branch-2.05.patch, HADOOP-14445.branch-2.06.patch,
HADOOP-14445.branch-2.8.003.patch, HADOOP-14445.branch-2.8.004.patch, HADOOP-14445.branch-2.8.005.patch,
HADOOP-14445.branch-2.8.006.patch, HADOOP-14445.branch-2.8.revert.patch, HADOOP-14445.revert.patch
>
>
> As discovered in HADOOP-14441, KMS HA using LoadBalancingKMSClientProvider do not share
delegation tokens. (a client uses KMS address/port as the key for delegation token)
> {code:title=DelegationTokenAuthenticatedURL#openConnection}
> if (!creds.getAllTokens().isEmpty()) {
>         InetSocketAddress serviceAddr = new InetSocketAddress(url.getHost(),
>             url.getPort());
>         Text service = SecurityUtil.buildTokenService(serviceAddr);
>         dToken = creds.getToken(service);
> {code}
> But KMS doc states:
> {quote}
> Delegation Tokens
> Similar to HTTP authentication, KMS uses Hadoop Authentication for delegation tokens
too.
> Under HA, A KMS instance must verify the delegation token given by another KMS instance,
by checking the shared secret used to sign the delegation token. To do this, all KMS instances
must be able to retrieve the shared secret from ZooKeeper.
> {quote}
> We should either update the KMS documentation, or fix this code to share delegation tokens.



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