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<span style="font-weight:bold">From: </span>Yujun Zhang<br>
<span style="font-weight:bold">Date: </span>Tuesday, 9 August 2016 at 14:48<br>
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1. How do I register a new datasource in an existing system?<br>
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<div>[yujunz] It seems to be in <a href="https://github.com/openstack/vitrage/blob/master/vitrage/datasources/__init__.py">
https://github.com/openstack/vitrage/blob/master/vitrage/datasources/__init__.py</a><span style="line-height:1.5"> </span></div>
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<div>Not exactly. This file defines the default datasources to be used. You can overwrite this list in /etc/vitrage/vitrage.conf. For example:</div>
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<div>[datasources]</div>
<div>types = nova.host,nova.instance,nova.zone,cinder.volume,neutron.network,neutron.port</div>
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2. Is the type of datasource (ALARM/RESOURCE) configured in `/etc/vitrage/datasource_values/<datasource>.yaml` ?</blockquote>
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<div>[Ifat]: No, it is configured in the datasource code. For information about datasource_values please see [3]</div>
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<div>[yujunz] which code file? I found `category: RESOURCE` in the datasource configuration file as <a href="https://github.com/openstack/vitrage/blob/master/doc/source/resource-state-config.rst#format">https://github.com/openstack/vitrage/blob/master/doc/source/resource-state-config.rst#format</a></div>
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<div>EntityCategory is defined in <a href="https://github.com/openstack/vitrage/blob/master/vitrage/common/constants.py">https://github.com/openstack/vitrage/blob/master/vitrage/common/constants.py</a> </div>
<div>It is used in the transformer files of each datasource.</div>
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5. What is the required data format for the datasource driver api? The inline comments give some brief description but didn't specify the api signature.</blockquote>
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Many thanks.<br>
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<div>[Ifat]: This should be part of the datasource documentation that we need to add. But basically, the driver should return a dictionary with few predefined fields (like datasource type, timestamp), and add whatever data is needed for the datasource. Then,
the datasource transformer will transform this data into a vertex and decide where to connect it to the graph.</div>
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<div>[yujunz] So if I understand it correctly, driver and transformer works as a pair and the intermediate data format is not exposed to vitrage. It consumes data from the sources and convert them into graph </div>
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<div>Right.</div>
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