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undercloud overcloud

asked 2019-05-22 05:34:46 -0500

lelunicu gravatar image

hi, just to clarify.

the undercloud is in one server and comprises services -neutron,heat,keystone so on. the overcloud is composed by nodes with roles (controller,compute,so on) and services on every node.right? on top of overcloud we can setup our private or public cloud-composed by instances,images,routers,ro on.right?

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answered 2019-05-22 06:19:51 -0500

The overcloud is your private or public cloud with instances, images, routers etc. It runs on controllers and compute nodes that the undercloud manages via Ironic.

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from this ( i understand that the overcloud is the platform.On this platform i can create image instance volume so on.right?

lelunicu gravatar imagelelunicu ( 2019-05-22 07:54:01 -0500 )edit

can we say that inside compute instance run VM instances?

lelunicu gravatar imagelelunicu ( 2019-05-22 08:15:54 -0500 )edit

The compute node IS the virtualization stack of openstack with the (nova) service. So YES VM's run on compute node.

Shmii gravatar imageShmii ( 2019-05-22 08:41:13 -0500 )edit

Yes, on the overcloud, you create your cloud resources like images, instances, volumes, etc.

Bernd Bausch gravatar imageBernd Bausch ( 2019-05-22 09:09:59 -0500 )edit

Yes, an overcloud’s compute node is a (baremetal) instance in the undercloud. So, you can indeed say that overcloud VM instances run inside undercloud compute instances.

Bernd Bausch gravatar imageBernd Bausch ( 2019-05-22 09:12:22 -0500 )edit

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Asked: 2019-05-22 05:34:46 -0500

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Last updated: May 22 '19