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Bug 1667011

Summary: [Docs] Provide instructions on how to use overcloud-minimal image
Product: Red Hat OpenStack Reporter: Giulio Fidente <gfidente>
Component: documentationAssignee: ndeevy <ndeevy>
Status: CLOSED CURRENTRELEASE QA Contact: RHOS Documentation Team <rhos-docs>
Severity: unspecified Docs Contact:
Priority: high    
Version: 13.0 (Queens)CC: dcadzow, jschluet, lmarsh, ndeevy, pgrist, yrabl
Target Milestone: ---Keywords: ZStream
Target Release: ---   
Hardware: Unspecified   
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: 1667013 1752889 (view as bug list) Environment:
Last Closed: 2019-04-29 13:50:22 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 1752889    

Description Giulio Fidente 2019-01-17 08:50:19 UTC 
We should document how to use the special overcloud-minimal image for those Director roles which do not need to host any OpenStack service, for example the CephStorage role.

Nodes which don't need to host OpenStack services can use the overcloud-minimal image so that they do not consume up an OpenStack entitlement.

All roles use by default the overcloud-full image but, for those roles which should use the overcloud-minimal image instead, operators can customize the image name to use via Heat environment file.

The Heat parameter to use is built appending the "Image" suffix to the role name; for example, for the CephStorage role, the environment file would look like this:

parameter_defaults:
  CephStorageImage: overcloud-minimal
Comment 3 ndeevy 2019-04-29 13:50:22 UTC 

Updated and merged for OSP13-queens in the following guides:

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/deploying_an_overcloud_with_containerized_red_hat_ceph/index#defining-the-root-disk

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/director_installation_and_usage/index#defining-the-root-disk
Comment 4 ndeevy 2019-09-17 13:18:13 UTC 
Minor additional updates from the technical editor's review:

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/deploying_an_overcloud_with_containerized_red_hat_ceph/index#defining-the-root-disk

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/director_installation_and_usage/index#defining-the-root-disk