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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 Wed, 25 Jul 2018 22:52:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16556371#comment-16556371
] 

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

Thanks for the review [~jojochuang]. Will rebase on the next patch.

bq. 1
Good catch, you're right, will update in next rev.

bq. 2
Would {{KMSUtiltestInjector}} suffice? Or what any other suggestions?

bq. 3
Could you clarify which line?

bq. 4
I feel that's the goal of release notes. The last sentence of the release note seems clear
to me that the flag should not be set arbitrarily. If we raise the incompatible flag, we theoretically
cannot backport this to 2.x and 3.x...
Open to any recommendations though.

> 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.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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