0.7.1 with ssl

[alourie]

What is this PR for?

The Cassandra Interpreter does not support talking to clusters that use SSL/client to node encryption. It does not have the properties needed to configure the SSL Context. This PR adds the properties to the driver config and sets up the SSL options when they are requested.

What type of PR is it?

Feature

What is the Jira issue?

ZEPPELIN-1501

How should this be tested?

Using Cassandra/CQL interpreter connect to a Cassandra cluster that uses a client to node encryption, i.e:

%cassandra
describe keyspaces;

Questions:

• Does the licenses files need update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? Yes.
  The new SSL-related properties should be added to the list (cassandra.ssl.enabled, cassandra.ssl.truststore.path and cassandra.ssl.truststore.password).

[Leemoonsoo]

Thanks @alourie for the contribution
Could you configure CI? Following message from Jekins might help.

Looks like travis-ci is not configured for your fork.
Please setup by swich on 'zeppelin' repository at https://travis-ci.org/profile and travis-ci.
And then make sure 'Build branch updates' option is enabled in the settings https://travis-ci.org/instaclustr/zeppelin/settings.

To trigger CI after setup, you will need ammend your last commit with
git commit --amend
git push your-remote HEAD --force

See http://zeppelin.apache.org/contribution/contributions.html#continuous-integration.
Build step 'Execute shell' marked build as failure

Let me know if you have any problem on setting up CI.

[alourie]

Hi @Leemoonsoo! I have it in my task list, will get to it probably next week.

Thanks!

[instaclustr-oss]

Hi @Leemoonsoo

Sorry for taking awhile to setup the CI. Now that I have, I see some jobs fail. What should I do about it?

Thanks!

[Leemoonsoo]

They might be flaky tests. Could you retry failed jobs and see if it goes green?

[alourie]

@Leemoonsoo I've tried to rerun them few times. Only one now fails - build #4; fails with NPE in C* setup/tearDown:

org.apache.zeppelin.cassandra.CassandraInterpreterTest  Time elapsed: 40.218 sec  <<< ERROR!
java.lang.NullPointerException: null
	at org.apache.zeppelin.cassandra.CassandraInterpreter.open(CassandraInterpreter.java:200)
	at org.apache.zeppelin.cassandra.CassandraInterpreterTest.setUp(CassandraInterpreterTest.java:115)
org.apache.zeppelin.cassandra.CassandraInterpreterTest  Time elapsed: 40.219 sec  <<< ERROR!
java.lang.NullPointerException: null
	at org.apache.zeppelin.cassandra.CassandraInterpreter.close(CassandraInterpreter.java:235)
	at org.apache.zeppelin.cassandra.CassandraInterpreterTest.tearDown(CassandraInterpreterTest.java:120)

https://travis-ci.org/instaclustr/zeppelin/builds/252649615

There's no much more information beyond that. Anything else I could do to move this forward?

Thanks!

[Leemoonsoo]

Looks like code need to handle null return of getProperty(CASSANDRA_WITH_SSL) at org.apache.zeppelin.cassandra.CassandraInterpreter.open(CassandraInterpreter.java:200)

[alourie]

@Leemoonsoo oh wow, who knew. So now it works. All checks passed :-)

Thanks for the help!

[Leemoonsoo]

LGTM. Merge this PR to master if no further discussions.

@alourie Could you let me know your JIRA id? i'd like to mark https://issues.apache.org/jira/browse/ZEPPELIN-1501 resolved with your id as assignee.

[alourie]

@Leemoonsoo my Jira ID is alourie, but please assign it to Rob Marshall, who opened the ticket. He did all the development, I just helped with the PR/CI :-)

[Leemoonsoo]

Thanks @alourie and Rob Marshall.
This PR has merged. but @asfgit didn't automatically closed it. @alourie Could you close this PR manually?