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Posted to common-issues@hadoop.apache.org by "Ajay Kumar (JIRA)" <ji...@apache.org> on 2018/08/02 18:30:00 UTC
[jira] [Comment Edited] (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=16566084#comment-16566084 ]
Ajay Kumar edited comment on HADOOP-14445 at 8/2/18 6:29 PM:
-------------------------------------------------------------
[~xiaochen] thanks for updating the patch. LGTM.
{quote}This patch does not change that code path and is unrelated to client retry behavior, but on the delegation token side. So I don't think adding the config would add reasonable value here.
{quote}
Although this patch is mostly about KMS DT i was thinking of failover testing for KMS HA when auth method will be DT. But i don't feel too strongly about it, feel free to commit it as this is important improvement over current state.
was (Author: ajayydv):
[~xiaochen] thanks for updating the patch. LGTM.
{quote}This patch does not change that code path and is unrelated to client retry behavior, but on the delegation token side. So I don't think adding the config would add reasonable value here.{quote}
Although this patch is mostly about KMS DT i was thinking of failover testing for KMS HA when auth method will be DT.
> 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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