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From "Xiao Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14445) Delegation tokens are not shared between KMS instances
Date Thu, 23 Aug 2018 18:38:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16590670#comment-16590670
] 

Xiao Chen commented on HADOOP-14445:
------------------------------------

Good to know, thanks for the update [~daryn].

I agree we can take advantage of the kind-less token lookup to build the silver bullet. Was
trying to make the new behavior correctly based on token kind in the last patch, but looking
forward to the magical patch before I really hold any opinion.

> 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-14445.16.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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