Roman Shaposhnik created BIGTOP-635:
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Summary: Implement a cluster-abstraction, discovery and
manipulation framework for iTest
Key: BIGTOP-635
URL: https://issues.apache.org/jira/browse/BIGTOP-635
Project: Bigtop
Issue Type: New Feature
Components: Tests
Affects Versions: 0.4.0
Reporter: Roman Shaposhnik
Assignee: Roman Shaposhnik
We've come to a point where our tests need to have a uniform way of interfacing
with the cluster under test. It is no longer ok to assume that the test can be
executed on a particular node (and thus have access to services running on it).
It is also less than ideal for tests to assume a particular type of interaction
with the services since it tends to break in different deployment scenarios.
A framework that needs to be put in place has to be capable of (regardless of
where a test using it is executed on):
# representing the abstract configuration of the cluster
# representing the abstract topology of the entire cluster (services running
on a cluster, nodes hosting the daemons, racks, etc).
# giving tests an ability to query this topology
# giving tests an ability to affect the nodes in that topology in a
particular way (refreshing configuration, restarting services, etc.)
Of course, the ideal solution here would be to give Bigtop tests a programmatic
access to a Hadoop cluster management framework such as Cloudera's CM or Apache
Ambari.
As with any ideal solutions I don't think it is realistic though. Hence we have
to cook something up. At this point I'm really focused on getting the API right
and I'm totally fine with an implementation of that API to be something as
silly as a bunch of ssh-based scripts or something.
This JIRA is primarily focused on coming up with such an API. Anybody who's
willing to help is welcome to.
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