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https://issues.apache.org/jira/browse/ZOOKEEPER-2014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15565419#comment-15565419
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Flavio Junqueira commented on ZOOKEEPER-2014:
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I checked that it works for me when reconfig is enabled. I have a couple of
other things I wanted to raise:
# When I tried with reconfig disabled, I got this message:
{noformat}
reconfig -add server.5=127.0.0.1:1234:1235;1236
KeeperErrorCode = Reconfig is disabled for
{noformat}
And it should be only {{Reconfig disabled}}, unless we want to convey some
other information.
# I have also verified that to get the reconfig command to go through we only
need the leader to have {{reconfigEnabled = true}}. There is no way around it
unless the replicas coordinate to use the same value. We need it well
documented, though.
> Only admin should be allowed to reconfig a cluster
> --------------------------------------------------
>
> Key: ZOOKEEPER-2014
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2014
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.5.0
> Reporter: Raul Gutierrez Segales
> Assignee: Michael Han
> Priority: Blocker
> Fix For: 3.5.3
>
> Attachments: ZOOKEEPER-2014.patch, ZOOKEEPER-2014.patch,
> ZOOKEEPER-2014.patch, ZOOKEEPER-2014.patch, ZOOKEEPER-2014.patch,
> ZOOKEEPER-2014.patch, ZOOKEEPER-2014.patch, ZOOKEEPER-2014.patch,
> ZOOKEEPER-2014.patch
>
>
> ZOOKEEPER-107 introduces reconfiguration support via the reconfig() call. We
> should, at the very least, ensure that only the Admin can reconfigure a
> cluster. Perhaps restricting access to /zookeeper/config as well, though this
> is debatable. Surely one could ensure Admin only access via an ACL, but that
> would leave everyone who doesn't use ACLs unprotected. We could also force a
> default ACL to make it a bit more consistent (maybe).
> Finally, making reconfig() only available to Admins means they have to run
> with zookeeper.DigestAuthenticationProvider.superDigest (which I am not sure
> if everyone does, or how would it work with other authentication providers).
> Review board https://reviews.apache.org/r/51546/
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