Hi Bosco,
On 15/01/19 12:41, Don Bosco Durai wrote:
Matteo
Are you extending current plugin or creating brand new custom plugin
for another component?
Actually I'm not sure whether I need to extend an existing plugin or
create a new brand one.
I will use Apache Ranger to provide runtime policy enforcement point for
Hadoop products using policies from an external REST service.
What solution do you think I should engage?
If it current plugin, then Ranger has a design where you can enrich
the context and use it in condition. IP based and most internal
extensions uses that design pattern. The Policy side, you don’t need
any code change. For the enricher, you might have to add JAR files. If
you feel this will work for you, then Abhay or Madhan might be able to
answer this in more detail.
If you are going to extend current plugin class, e.g. for YARN, then
you will have to extend RangerYarnAuthorizer class on both
implementation and shim package. You can then override the
checkPermission method or customize RangerYarnPlugin (which does the
actual check) and overwrite the init() to use your plugin class.
Just FYI, right from the beginning, Ranger team has avoided making
outbound call during authorization. This could significantly affect
your performance, particularly in high velocity components like HDFS,
Kafka, etc. I would suggest (if possible) that you consider caching
some of the authorization decisions within the plugin.
thank for the tip, I'll do that!
Anyway, in my current simple test I'm extending the YARN plugin (I don't
think I will need to extend it, it's just to test a custom service
registering operation), I registered it by using:
curl -u admin:admin -X POST -H "Accept: application/json" -H
"Content-Type: application/json" –d @ranger-servicedef-test.json
http://localhost:6080/service/plugins/definitions
but when I click "Add new service" for the new service type and click
"Save" I get an error:
/Test failed to find service class
org.apache.ranger.services.test.RangerServiceTest. Resource lookup will
not be available. Please make sure plugin jar is in the correct place./
but the custom plugin folder is in the Apache Ranger main folder, what
am I missing?
Best Regards,
Matteo
Bosco
*From: *Matteo Alessandroni <matteo.alessandr...@tirasa.net>
*Reply-To: *<user@ranger.apache.org>
*Date: *Tuesday, January 15, 2019 at 3:07 AM
*To: *<user@ranger.apache.org>
*Subject: *How to extend the authorization engine in order to use an
external service
I would like to extend the authorization mechanism of Apache Ranger in
order to make authorization based on the response of an external REST
service.
So, when the Ranger policy engine is called I would like to intercept
the request, call an external REST service to obtain some
authorization data and use it to decide who can access what.
As a general idea the external service gets a username and returns a
list of permissions / policies that user has.
Do you think I should build a custom plugin for it? Do I have to
create an "*authorizer*"? If so, what class do I need to extend (e.g.
"YarnAuthorizationProvider)" ?
Could you please give me an hit on where to start or a sample of
something similar to what I need?
Currently I'm trying to build a custom plugin (I started by seeing
wiki on [1]). I have added a class that extends
"YarnAuthorizationProvider" (I really don't know what class to use
here). I've also created another subclass that extends
"RangerPlainIDAccessRequest" so that I could access the request in the
"checkPermission()" overridden method and maybe do stuff there.
I'm not sure I'm in the right way! Any help would be appreciate!
Also, I'm not sure about how to test the plugin I have built. I tried
to put it in the Apache Ranger source code (v1.2.0) and re-build, now
I see the new service in the Apache Ranger Admin Console but what's next?
Thank you!
Best regards,
Matteo
[1]
https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=53741207
--
Dott. Matteo Alessandroni
Software Engineer @ Tirasa S.r.l.
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