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Posted to common-issues@hadoop.apache.org by "Xiao Chen (JIRA)" <ji...@apache.org> on 2018/05/05 03:31:00 UTC

[jira] [Commented] (HADOOP-14445) Delegation tokens are not shared between KMS instances

    [ https://issues.apache.org/jira/browse/HADOOP-14445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16464600#comment-16464600 ] 

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

Had an offline discussion with [~daryn], [~shahrs87], [~jojochuang] and [~templedf].

Given the linked broken jiras and the difficulty for Daryn's future token issuer work, we decided to revert this and resort to the single kms-dt with config path. Will do the revert on Monday and work on the older single kms-dt patch.

> 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
>             Fix For: 2.10.0, 2.8.4, 3.2.0, 3.1.1, 2.9.2, 3.0.3
>
>         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.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
>
>
> 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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