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From "Todd Greenwood" <to...@audiencescience.com>
Subject RE: ACL question w/ Zookeeper 3.1.1
Date Mon, 21 Sep 2009 21:25:23 GMT
Patrick / Mahadev,

I've spent the last couple of days attempting to isolate this issue, and
this is what I've come up with...

Mahadev's simple use case works fine, as posted. However, my more
involved use cases are consistently failing w/ InvalidACL exceptions
when I use digest authentication with Ids.CREATOR_ALL_ACL:

java.lang.Exception:
com.audiencescience.util.zookeeper.wrapper.ZooWrapperException:
org.apache.zookeeper.KeeperException$InvalidACLException:
KeeperErrorCode = InvalidACL for /ACLTest

Prior to throwing this exception, the response is
(Zookeeper.java:create()):
r = {org.apache.zookeeper.proto.ReplyHeader@1445}"0,0,-112\n
<mailto:{org.apache.zookeeper.proto.ReplyHeader@1445}> ". More debug
data below.

So, while I can get Mahadev's simple example to work, I cannot get a
more involved use case to work correctly. However, if I change my code
to use Ids.OPEN_ACL_UNSAFE, then everything works fine. Example debug
output below at "v5".

Could someone point me at non-trivial test cases for ACLs, and perhaps
give me some insight into how to debug this issue further?

-Todd


-------------------------------
Code Snippet ZooKeeper.java
-------------------------------

    public String create(String path, byte data[], List<ACL> acl,
            CreateMode createMode)
        throws KeeperException, InterruptedException
    {
        validatePath(path);

        RequestHeader h = new RequestHeader();
        h.setType(ZooDefs.OpCode.create);
        CreateRequest request = new CreateRequest();
        CreateResponse response = new CreateResponse();
        request.setData(data);
        request.setFlags(createMode.toFlag());
        request.setPath(path);
        if (acl != null && acl.size() == 0) {
            throw new KeeperException.InvalidACLException();
        }
        request.setAcl(acl);
        ReplyHeader r = cnxn.submitRequest(h, request, response, null);

>>> v3
>>> v5
        if (r.getErr() != 0) {

>>> v4
            throw
KeeperException.create(KeeperException.Code.get(r.getErr()),
                    path);
        }
        return response.getPath();
    }


---------------------------------------------
v3
---------------------------------------------
this = {org.apache.zookeeper.ZooKeeper@1267}
watchManager = {org.apache.zookeeper.ZooKeeper$ZKWatchManager@1379}
state = {org.apache.zookeeper.ZooKeeper$States@1380}"CONNECTED"
cnxn = {org.apache.zookeeper.ClientCnxn@1381}"sessionId:
0x123de5b3b1b0000\nlastZxid: 1\nxid: 2\nnextAddrToTry: 0\nserverAddrs:
/127.0.0.1:2181\n"
serverAddrs = {java.util.ArrayList@1386} size = 1
authInfo = {java.util.ArrayList@1387} size = 1
[0] = {org.apache.zookeeper.ClientCnxn$AuthData@1398}
scheme = {java.lang.String@1244}"digest"
data = {byte[13]@1399}
pendingQueue = {java.util.LinkedList@1388} size = 0
outgoingQueue = {java.util.LinkedList@1389} size = 1
nextAddrToTry = 0
connectTimeout = 40000
readTimeout = 26666
sessionTimeout = 50000
zooKeeper = {org.apache.zookeeper.ZooKeeper@1267}
watcher = {org.apache.zookeeper.ZooKeeper$ZKWatchManager@1379}
sessionId = 82153701637816320
sessionPasswd = {byte[16]@1390}
sendThread =
{org.apache.zookeeper.ClientCnxn$SendThread@1259}"Thread[main-SendThread
,5,main]"
eventThread =
{org.apache.zookeeper.ClientCnxn$EventThread@1266}"Thread[main-EventThre
ad,5,main]"
selector = {sun.nio.ch.EPollSelectorImpl@1391}
closing = false
eventOfDeath = {java.lang.Object@1392}
lastZxid = 1
xid = 2
acl = {java.util.ArrayList@1242} size = 1
[0] = {org.apache.zookeeper.data.ACL@1348}"31,s{'auth,'}\n"
perms = 31
id = {org.apache.zookeeper.data.Id@1404}"'auth,'\n"
request =
{org.apache.zookeeper.proto.CreateRequest@1360}"'/ACLTest,,v{},0\n"
path = {java.lang.String@1314}"/ACLTest"
data = {byte[0]@1339}
acl = null
flags = 0
path = {java.lang.String@1314}"/ACLTest"


---------------------------------------------
v4
---------------------------------------------
this = {org.apache.zookeeper.ZooKeeper@1267}
watchManager = {org.apache.zookeeper.ZooKeeper$ZKWatchManager@1379}
state = {org.apache.zookeeper.ZooKeeper$States@1453}"CLOSED"
cnxn = {org.apache.zookeeper.ClientCnxn@1381}"sessionId:
0x123de5b3b1b0000\nlastZxid: 1\nxid: 3\nnextAddrToTry: 0\nserverAddrs:
/127.0.0.1:2181\n"
serverAddrs = {java.util.ArrayList@1386} size = 1
authInfo = {java.util.ArrayList@1387} size = 1
[0] = {org.apache.zookeeper.ClientCnxn$AuthData@1398}
scheme = {java.lang.String@1244}"digest"
data = {byte[13]@1399}
pendingQueue = {java.util.LinkedList@1388} size = 0
outgoingQueue = {java.util.LinkedList@1389} size = 0
nextAddrToTry = 0
connectTimeout = 40000
readTimeout = 26666
sessionTimeout = 50000
zooKeeper = {org.apache.zookeeper.ZooKeeper@1267}
watcher = {org.apache.zookeeper.ZooKeeper$ZKWatchManager@1379}
sessionId = 82153701637816320
sessionPasswd = {byte[16]@1390}
sendThread =
{org.apache.zookeeper.ClientCnxn$SendThread@1259}"Thread[main-SendThread
,5,]"
eventThread =
{org.apache.zookeeper.ClientCnxn$EventThread@1266}"Thread[main-EventThre
ad,5,main]"
selector = {sun.nio.ch.EPollSelectorImpl@1391}
closing = false
eventOfDeath = {java.lang.Object@1392}
lastZxid = 1
xid = 3
response = {org.apache.zookeeper.proto.CreateResponse@1365}"\n"
r = {org.apache.zookeeper.proto.ReplyHeader@1445}"0,0,-112\n"
request =
{org.apache.zookeeper.proto.CreateRequest@1360}"'/ACLTest,,v{s{31,s{'aut
h,'}}},0\n"
path = {java.lang.String@1314}"/ACLTest"
data = {byte[0]@1339}
acl = {java.util.ArrayList@1242} size = 1
flags = 0
path = {java.lang.String@1314}"/ACLTest"
h = {org.apache.zookeeper.proto.RequestHeader@1352}"2,1\n"
cnxn = {org.apache.zookeeper.ClientCnxn@1381}"sessionId:
0x123de5b3b1b0000\nlastZxid: 1\nxid: 3\nnextAddrToTry: 0\nserverAddrs:
/127.0.0.1:2181\n"


--------------------------------------
v5

NOTE: If I use Ids.OPEN_ACL_UNSAFE, then everything works fine. Here's
an example of the debug state after a create()...
--------------------------------------

this = {org.apache.zookeeper.ZooKeeper@1266}
watchManager = {org.apache.zookeeper.ZooKeeper$ZKWatchManager@1397}
state = {org.apache.zookeeper.ZooKeeper$States@1398}"CONNECTED"
cnxn = {org.apache.zookeeper.ClientCnxn@1374}"sessionId:
0x123de6ba8de0000\nlastZxid: 2\nxid: 3\nnextAddrToTry: 0\nserverAddrs:
/127.0.0.1:2181\n"
serverAddrs = {java.util.ArrayList@1403} size = 1
authInfo = {java.util.ArrayList@1404} size = 1
[0] = {org.apache.zookeeper.ClientCnxn$AuthData@1415}
scheme = {java.lang.String@1244}"digest"
data = {byte[13]@1416}
pendingQueue = {java.util.LinkedList@1405} size = 0
outgoingQueue = {java.util.LinkedList@1406} size = 0
nextAddrToTry = 0
connectTimeout = 40000
readTimeout = 26666
sessionTimeout = 50000
zooKeeper = {org.apache.zookeeper.ZooKeeper@1266}
watcher = {org.apache.zookeeper.ZooKeeper$ZKWatchManager@1397}
sessionId = 82153772198789120
sessionPasswd = {byte[16]@1407}
sendThread =
{org.apache.zookeeper.ClientCnxn$SendThread@1259}"Thread[main-SendThread
,5,main]"
eventThread =
{org.apache.zookeeper.ClientCnxn$EventThread@1265}"Thread[main-EventThre
ad,5,main]"
selector = {sun.nio.ch.EPollSelectorImpl@1408}
closing = false
eventOfDeath = {java.lang.Object@1409}
lastZxid = 2
xid = 3
response = {org.apache.zookeeper.proto.CreateResponse@1360}"'/ACLTest\n"
r = {org.apache.zookeeper.proto.ReplyHeader@1389}"2,2,0\n"
xid = 2
zxid = 2
err = 0
request =
{org.apache.zookeeper.proto.CreateRequest@1355}"'/ACLTest,,v{s{15,s{'wor
ld,'anyone}}},0\n"
path = {java.lang.String@1314}"/ACLTest"
h = {org.apache.zookeeper.proto.RequestHeader@1347}"2,1\n"
cnxn = {org.apache.zookeeper.ClientCnxn@1374}"sessionId:
0x123de6ba8de0000\nlastZxid: 2\nxid: 3\nnextAddrToTry: 0\nserverAddrs:
/127.0.0.1:2181\n"

> -----Original Message-----
> From: Todd Greenwood [mailto:toddg@audiencescience.com]
> Sent: Friday, September 18, 2009 11:27 AM
> To: Patrick Hunt; zookeeper-dev@hadoop.apache.org; zookeeper-
> user@hadoop.apache.org
> Subject: RE: ACL question w/ Zookeeper 3.1.1
> 
> Patrick / Mahadev,
> 
> Thanks for the heads-up!
> 
> Apparently I *am* receiving email from zookeeper-user but it is being
> filtered out as spam. This just started happening, but I'll rectify on
> my end.
> 
> I'm working thru Mahadev's response and will respond shortly (and
search
> for other postings, as well). Appologies for the cross post.
> 
> -Todd
> 
> > -----Original Message-----
> > From: Patrick Hunt [mailto:phunt@apache.org]
> > Sent: Friday, September 18, 2009 11:19 AM
> > To: zookeeper-dev@hadoop.apache.org;
zookeeper-user@hadoop.apache.org
> > Cc: Todd Greenwood
> > Subject: Re: ACL question w/ Zookeeper 3.1.1
> >
> > Todd, there were other responses as well. Are you seeing other
traffic
> > from 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 then
> > > I tried
> > >
> > > Without auth
> > >
> > > Getdata("/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)
> > >     at
> > >
>
org.apache.zookeeper.ZooKeeperMain.processZKCmd(ZooKeeperMain.java:692)
> > >     at
> >
org.apache.zookeeper.ZooKeeperMain.processCmd(ZooKeeperMain.java:579)
> > >     at
> > >
> org.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" <toddg@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-user@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.C62092388873@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
> > >

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