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From Zhijie Shen <zs...@hortonworks.com>
Subject [DISUCSS] Reasonable Hadoop ACL Defaults
Date Tue, 16 Sep 2014 08:19:20 GMT
Hi folks,

There're a bunch of ACLs configuration defaults, which are set to "*":

1. yarn.admin.acl in yarn-default.xml
2. yarn.scheduler.capacity.root.default.[acl_submit_applications|acl_administer_queue]
in capacity-scheduler.xml
3. security.*.protocol.acl in hadoop-policy.xml

When ACL (or server authorization) is enabled, the resources that are
supposed to be protected are still accessible. However, anybody can
still access them because the default configurations are "*",
accepting anybody. These defaults seem not to make much sense, but
only confuse users. Instead, the reasonable behavior should be that
when ACL is enabled, a user is going to be denied by default unless we
explicitly add him/her into the admin ACLs or the authorized
user/group list.

I have a patch to invert "*" to " "  to block all users by default.
Please let me how what you think about it, and how we should progress.


Zhijie Shen
Hortonworks Inc.

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