Re: ACL question w/ Zookeeper 3.1.1

Patrick Hunt Fri, 18 Sep 2009 11:21:03 -0700

Todd, there were other responses as well. Are you seeing other trafficfrom the lists? (perhaps a spam filtering issue?)


Patrick


Mahadev Konar wrote:

HI todd,
  We did respond on zookeeper-user. Here is my response in case you didn't

see it...


HI todd,
 From what I understand, you are sayin that a creator_all_acl does not work
with auth?

 I tried the following with CREATOR_ALL_ACL and it seemed to work for me...

import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.ACL;
import org.apache.zookeeper.ZooDefs.Ids;
import java.util.ArrayList;
import java.util.List;

public class TestACl implements Watcher {

    public static void main(String[] argv) throws Exception {
        List<ACL> acls = new ArrayList<ACL>(1);
        String authentication_type = "digest";
        String authentication = "mahadev:some";

        for (ACL ids_acl : Ids.CREATOR_ALL_ACL) {
            acls.add(ids_acl);
        }
        TestACl tacl = new TestACl();
        ZooKeeper zoo = new ZooKeeper("localhost:2181", 3000, tacl);
        zoo.addAuthInfo(authentication_type, authentication.getBytes());
        zoo.create("/some", new byte[0], acls, CreateMode.PERSISTENT);
        zoo.setData("/some", new byte[0], -1);
    }

    @Override
    public void process(WatchedEvent event) {


    }
}


And it worked on my set of zookeeper servers....

And thenI triedWithout authGetdata("/some")

Which correctly gave me the error:


Exception in thread "main"
org.apache.zookeeper.KeeperException$NoAuthException: KeeperErrorCode =
NoAuth for /some
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:104)
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
    at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:892)
    at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:921)

atorg.apache.zookeeper.ZooKeeperMain.processZKCmd(ZooKeeperMain.java:692)

    at org.apache.zookeeper.ZooKeeperMain.processCmd(ZooKeeperMain.java:579)

atorg.apache.zookeeper.ZooKeeperMain.executeLine(ZooKeeperMain.java:351)

    at org.apache.zookeeper.ZooKeeperMain.run(ZooKeeperMain.java:309)
    at org.apache.zookeeper.ZooKeeperMain.main(ZooKeeperMain.java:268)


Is this what you are trying to do?

Thanks
mahadev


On 9/18/09 10:33 AM, "Todd Greenwood" <to...@audiencescience.com> wrote:

Appologies for cross posting, but I haven't received a response on this.
Quite simply, could someone point me to a working example/tutorial/docs
that describe how to use digest ACLs in zookeeper 3.1.1? The docs that I
have found (referenced below) have not clarified this for me.

-Todd

-----Original Message-----
From: Todd Greenwood
Sent: Thursday, September 17, 2009 5:05 PM
To: 'zookeeper-u...@hadoop.apache.org'
Subject: ACL question w/ Zookeeper 3.1.1

I'm attempting to secure a zookeeper installation using zookeeper

ACLs.

However, I'm finding that while Ids.OPEN_ACL_UNSAFE works great, my
attempts at using Ids.CREATOR_ALL_ACL are failing. Here's a code

snippet:


public class ZooWrapper
{

/*
1. Here I'm setting up my authentication. I've got an ACL list, and my
authentication strings.
*/
    private final List<ACL> acl = new ArrayList<ACL>( 1 );
    private static final String authentication_type = "digest";
    private static final String authentication =

"audiencescience:gravy";


    public ZooWrapper( final String connection_string,
                       final String path,
                       final int connectiontimeout ) throws
ZooWrapperException
    {
...
/*
2. Here I'm adding the acls
*/

        // This works (creates nodes, sets data on nodes)
        for ( ACL ids_acl : Ids.OPEN_ACL_UNSAFE )
        {
            acl.add( ids_acl);
        }

/*
NOTE:  This does not work (nodes are not created, cannot set data on

nodes

b/c nodes do not exist)
*/

//        for ( ACL ids_acl : Ids.CREATOR_ALL_ACL )
//        {
//            acl.add( ids_acl );
//        }

/*
3. Finally, I create a new zookeeper instance and add my authorization
info to it.
*/
     zoo = new ZooKeeper( connection_string, connectiontimeout, this

);

     zoo.addAuthInfo( authentication_type, authentication.getBytes() )

/*
4. Later, I try to write some data into zookeeper by first creating

the

node, and then calling setdata...
*/
      zoo.create( path, new byte[0], acl, CreateMode.PERSISTENT );
      zoo.setData( path, bytes, -1 )

As I mentioned above, when I add Ids.OPEN_ACL_UNSAFE to acl, then both

the

create and setData succeed. However, when I use Ids.CREATOR_ALL_ACL,

then

the nodes are not created. Am I missing something obvious w/ respect

to

configuring ACLs?

I've used the following references:

http://hadoop.apache.org/zookeeper/docs/r3.1.1/zookeeperProgrammers.html

http://mail-archives.apache.org/mod_mbox/hadoop-zookeeper-
commits/200807.mbox/%3c20080731201025.c62092388...@eris.apache.org%3e

http://books.google.com/books?id=bKPEwR-

Pt6EC&pg=PT404&lpg=PT404&dq=zookeeper+ACL+digest+%22new+Id%22&source=bl&
ot
s=kObz0y8eFk&sig=VFCAsNW0mBJyZswoweJDI31iNlo&hl=en&ei=Z82ySojRFsqRlAeqxs
yI
Dw&sa=X&oi=book_result&ct=result&resnum=6#v=onepage&q=zookeeper%20ACL%20
di

gest%20%22new%20Id%22&f=false

-Todd

Re: ACL question w/ Zookeeper 3.1.1

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