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tripleo-docs
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Clarify per role NovaEnableRbdBackend docs 

Removes refrences to ceph-ansible-per-role env file.
Mention the logic for glance show_multiple_locations and image_conversion.

Change-Id: I0a4d23a8f79d3ea90756b5acf58407d9de53f04f
This commit is contained in:
Oliver Walsh 2020-05-14 19:03:07 +01:00
parent 17fcbded0d
commit ef28b8150e
1 changed files with 16 additions and 7 deletions
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23
deploy-guide/source/features/ceph_config.rst
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@ -76,13 +76,12 @@ Configuring nova-compute ephemeral backend per role
---------------------------------------------------
NovaEnableRdbBackend can be configured on a per-role basis allowing compute
hosts to be deployed with a subset using RBD ephemeral disk. The
remaining hosts continue using the default local ephemeral disk.
hosts to be deployed with a subset using RBD ephemeral disk and a subset using
local ephemeral disk.
.. note::
For best performacne images to be deployed to RBD ephemeral computes should be in RAW format while images to be deployed to local ephemeral computes should be QCOW2 format.
For best performance images to be deployed to RBD ephemeral computes should be in RAW format while images to be deployed to local ephemeral computes should be QCOW2 format.
Generate roles_data including the provided ComputeLocalEphemeral and
ComputeRBDEphemeral roles as described in the :ref:`custom_roles`
@ -103,10 +102,20 @@ parameter on any Compute role, for example::
MyCustomComputeParameters:
NovaEnableRbdBackend: false
Deploy using the per-role ceph-ansible environment file
"environments/ceph-ansible/ceph-ansible-per-role.yaml"::
If the top-level NovaEnableRbdBackend parameter is set to true, as it is in
environments/ceph-ansible/ceph-ansible.yaml, then then this will be
the default when not overridden via role parameters.
openstack overcloud deploy --templates -r my_roles_data.yaml -e nodes.yaml -e /usr/share/openstack-tripleo-heat-templates/environments/ceph-ansible/ceph-ansible-per-role.yaml
Setting NovaEnableRbdBackend to true at the top level also enables the glance
image_conversion import plugin and show_multiple_locations option.
These parameters must be set explicitly when changing the top-level
NovaEnableRbdBackend to false::
parameter_defaults:
NovaEnableRbdBackend: false
GlanceShowMultipleLocations: true
GlanceImageImportPlugins:
- image_conversion
Customizing ceph.conf with puppet-ceph
--------------------------------------