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Agree to rename this legacy field to ‘version’. Adding to John's words about HDP, Vanilla plugin is able to run different hadoop versions by doing some manipulations with DIB scripts :-) So the right name of this field should be ‘version’ as version of engine of concrete plugin.

Regards,
Alexander Ignatov



On 18 Feb 2014, at 01:01, John Speidel <jspeidel at hortonworks.com> wrote:

> Andrew +1
> 
> The HDP plugin also returns the HDP distro version.  The version needs to make sense in the context of the plugin.
> Also, many plugins including the HDP plugin will support deployment of several hadoop versions.
> 
> -John
> 
> 
> On Mon, Feb 17, 2014 at 2:36 PM, Andrew Lazarev <alazarev at mirantis.com> wrote:
> IDH uses version of IDH distro and there is no direct mapping between distro version and hadoop version. E.g. IDH 2.5.1 works with apache hadoop 1.0.3. 
> 
> I suggest to call the field as just 'version' everywhere and assume this version as plugin specific property.
> 
> Andrew.
> 
> 
> On Mon, Feb 17, 2014 at 5:06 AM, Matthew Farrellee <matt at redhat.com> wrote:
> $ savanna plugins-list
> +---------+----------+---------------------------+
> | name    | versions | title                     |
> +---------+----------+---------------------------+
> | vanilla | 1.2.1    | Vanilla Apache Hadoop     |
> | hdp     | 1.3.2    | Hortonworks Data Platform |
> +---------+----------+---------------------------+
> 
> above is output from the /plugins endpoint - http://docs.openstack.org/developer/savanna/userdoc/rest_api_v1.0.html#plugins
> 
> the question is, should the version be the version of the plugin or the version of hadoop the plugin installs?
> 
> i ask because it seems like we have version == plugin version for hdp and version == hadoop version for vanilla.
> 
> the documentation is somewhat vague on the subject, mostly stating "version" without qualification. however, the json passed to the service references "hadoop_version" and the arguments in the client are called "hadoop_version"
> 
> fyi, this could be complicated by the idh and spark plugins.
> 
> best,
> 
> 
> matt
> 
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