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From "Josh Elser" <josh.el...@gmail.com>
Subject Re: Review Request 29386: ACCUMULO-2815 Client authentication via Kerberos
Date Mon, 29 Dec 2014 16:07:09 GMT


> On Dec. 29, 2014, 2:46 p.m., kturner wrote:
> > core/src/main/java/org/apache/accumulo/core/conf/Property.java, line 166
> > <https://reviews.apache.org/r/29386/diff/1/?file=799926#file799926line166>
> >
> >     Not sure about adding this if the only use case is benchmarking.  If it is added,
maybe it should be marked experimental.

After writing the little benchmark, I definitely didn't want to have to do it again, so I'd
like to have *some* way to programmatically control this. I'm not sure that "Experimental"
is the right adjective (an InternalUseOnly or similar would be more accurate) but marking
it experimental is a quick solution.


> On Dec. 29, 2014, 2:46 p.m., kturner wrote:
> > server/base/src/main/java/org/apache/accumulo/server/thrift/UGIAssumingProcessor.java,
line 70
> > <https://reviews.apache.org/r/29386/diff/1/?file=799944#file799944line70>
> >
> >     Should this be unset in a finally block?

That's a good question. I don't think it's an issue -- even if we get a re-used thread out
of the TThreadPoolServer, this code will throw an exception if we can't proxy the remote user
on top of the server user and get client's username. However, it's a simple thing to add which
will likely be benign and add some more clarity.


> On Dec. 29, 2014, 2:46 p.m., kturner wrote:
> > server/base/src/main/java/org/apache/accumulo/server/security/SecurityOperation.java,
line 120
> > <https://reviews.apache.org/r/29386/diff/1/?file=799941#file799941line120>
> >
> >     ?

Heh, missed this. I thought I needed to add more here, but I ultimately got what I needed
with a new authenticator.


- Josh


-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/29386/#review66258
-----------------------------------------------------------


On Dec. 24, 2014, 4:51 a.m., Josh Elser wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/29386/
> -----------------------------------------------------------
> 
> (Updated Dec. 24, 2014, 4:51 a.m.)
> 
> 
> Review request for accumulo.
> 
> 
> Bugs: ACCUMULO-2815
>     https://issues.apache.org/jira/browse/ACCUMULO-2815
> 
> 
> Repository: accumulo
> 
> 
> Description
> -------
> 
> ACCUMULO-2815 Initial support for Kerberos client authentication.
> 
> Leverage SASL transport provided by Thrift which can speak GSSAPI, which Kerberos implements.
Introduced...
> 
> * An Accumulo KerberosToken which is an AuthenticationToken to validate users.
> * Custom thrift processor and invocation handler to ensure server RPCs have a valid KRB
identity and Accumulo authentication.
> * A KerberosAuthenticator which extends ZKAuthenticator to support Kerberos identities
seamlessly.
> * New ClientConf variables to use SASL transport and pass Kerberos server principal
> * Updated ClientOpts and Shell opts to transparently use a KerberosToken when SASL is
enabled (no extra client work).
> 
> I believe this is the "bare minimum" for Kerberos support. They are also grossly lacking
in unit and integration tests. I believe that I might have somehow broken the client address
string in the server (I saw log messages with client: null, but I'm not sure if it's due to
these changes or not). A necessary limitation in the Thrift server used is that, like the
SSL transport, the SASL transport cannot presently be used with the TFramedTransport, which
means none of the [half]async thrift servers will function with this -- we're stuck with the
TThreadPoolServer.
> 
> Performed some contrived benchmarks on my laptop (while still using it myself) to get
at big-picture view of the performance impact against "normal" operation and Kerberos alone.
Each "run" was the duration to ingest 100M records using continuous-ingest, timed with `time`,
using 'real'.
> 
> THsHaServer (our default), 6 runs:
> 
> Avg: 10m7.273s (607.273s)
> Min: 9m43.395s
> Max: 10m52.715s
> 
> TThreadPoolServer (no SASL), 5 runs:
> 
> Avg: 11m16.254s (676.254s)
> Min: 10m30.987s
> Max: 12m24.192s
> 
> TThreadPoolServer+SASL/GSSAPI (these changes), 6 runs:
> 
> Avg: 13m17.187s (797.187s)
> Min: 10m52.997s
> Max: 16m0.975s
> 
> The general takeway is that there's about 15% performance degredation in its initial
state which is in the realm of what I expected (~10%).
> 
> 
> Diffs
> -----
> 
>   core/src/main/java/org/apache/accumulo/core/cli/ClientOpts.java f6ea934 
>   core/src/main/java/org/apache/accumulo/core/client/ClientConfiguration.java 6fe61a5

>   core/src/main/java/org/apache/accumulo/core/client/impl/ClientContext.java e75bec6

>   core/src/main/java/org/apache/accumulo/core/client/impl/ConnectorImpl.java f481cc3

>   core/src/main/java/org/apache/accumulo/core/client/impl/ThriftTransportKey.java 6dc846f

>   core/src/main/java/org/apache/accumulo/core/client/impl/ThriftTransportPool.java 5da803b

>   core/src/main/java/org/apache/accumulo/core/client/security/tokens/KerberosToken.java
PRE-CREATION 
>   core/src/main/java/org/apache/accumulo/core/conf/Property.java e054a5f 
>   core/src/main/java/org/apache/accumulo/core/rpc/FilterTransport.java PRE-CREATION 
>   core/src/main/java/org/apache/accumulo/core/rpc/SaslConnectionParams.java PRE-CREATION

>   core/src/main/java/org/apache/accumulo/core/rpc/TTimeoutTransport.java 6eace77 
>   core/src/main/java/org/apache/accumulo/core/rpc/ThriftUtil.java 09bd6c4 
>   core/src/main/java/org/apache/accumulo/core/rpc/UGIAssumingTransport.java PRE-CREATION

>   core/src/main/java/org/apache/accumulo/core/rpc/UGIAssumingTransportFactory.java PRE-CREATION

>   core/src/main/java/org/apache/accumulo/core/security/Credentials.java 525a958 
>   proxy/src/main/java/org/apache/accumulo/proxy/Proxy.java 4b048eb 
>   server/base/src/main/java/org/apache/accumulo/server/AccumuloServerContext.java 09ae4f4

>   server/base/src/main/java/org/apache/accumulo/server/init/Initialize.java 046cfb5 
>   server/base/src/main/java/org/apache/accumulo/server/rpc/TCredentialsUpdatingInvocationHandler.java
PRE-CREATION 
>   server/base/src/main/java/org/apache/accumulo/server/rpc/TCredentialsUpdatingWrapper.java
PRE-CREATION 
>   server/base/src/main/java/org/apache/accumulo/server/rpc/TServerUtils.java 641c0bf

>   server/base/src/main/java/org/apache/accumulo/server/rpc/ThriftServerType.java PRE-CREATION

>   server/base/src/main/java/org/apache/accumulo/server/security/SecurityOperation.java
5e81018 
>   server/base/src/main/java/org/apache/accumulo/server/security/SystemCredentials.java
a59d57c 
>   server/base/src/main/java/org/apache/accumulo/server/security/handler/KerberosAuthenticator.java
PRE-CREATION 
>   server/base/src/main/java/org/apache/accumulo/server/thrift/UGIAssumingProcessor.java
PRE-CREATION 
>   server/base/src/test/java/org/apache/accumulo/server/security/SystemCredentialsTest.java
4202a7e 
>   server/gc/src/main/java/org/apache/accumulo/gc/SimpleGarbageCollector.java 93a9a49

>   server/gc/src/test/java/org/apache/accumulo/gc/GarbageCollectWriteAheadLogsTest.java
f98721f 
>   server/gc/src/test/java/org/apache/accumulo/gc/SimpleGarbageCollectorTest.java 99558b8

>   server/gc/src/test/java/org/apache/accumulo/gc/replication/CloseWriteAheadLogReferencesTest.java
cad1e01 
>   server/master/src/main/java/org/apache/accumulo/master/Master.java 12195fa 
>   server/tracer/src/main/java/org/apache/accumulo/tracer/TraceServer.java 7e33300 
>   server/tserver/src/main/java/org/apache/accumulo/tserver/TabletServer.java d5c1d2f

>   shell/src/main/java/org/apache/accumulo/shell/Shell.java 58308ff 
>   shell/src/main/java/org/apache/accumulo/shell/ShellOptionsJC.java 8167ef8 
>   test/src/main/java/org/apache/accumulo/test/functional/ZombieTServer.java eb84533 
>   test/src/main/java/org/apache/accumulo/test/performance/thrift/NullTserver.java 2ebc2e3

>   test/src/test/java/org/apache/accumulo/server/security/SystemCredentialsIT.java fb71f5f

> 
> Diff: https://reviews.apache.org/r/29386/diff/
> 
> 
> Testing
> -------
> 
> Ensure existing unit tests still function. Accumulo is functional and ran continuous
ingest multiple times using a client with only a Kerberos identity (no user/password provided).
Used MIT Kerberos with Apache Hadoop 2.6.0 and Apache ZooKeeper 3.4.5.
> 
> 
> Thanks,
> 
> Josh Elser
> 
>


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