Bug 1569263 - [RFE] Add Ceph-Optimized NIC Config Examples
Summary: [RFE] Add Ceph-Optimized NIC Config Examples
Keywords:
Status: NEW
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: openstack-tripleo-heat-templates
Version: 13.0 (Queens)
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
: ---
Assignee: Dan Sneddon
QA Contact: Gurenko Alex
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-04-18 23:33 UTC by Dan Sneddon
Modified: 2020-04-05 10:02 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Known Issue
Doc Text:
Cause: Bridges are not required on Ceph nodes, but most of our sample NIC config templates do have bridges for Ceph nodes. Consequence: Using bridges on the Ceph interfaces may increase CPU utilization dedicated to network traffic, at the expense of the Ceph storage processes. Workaround (if any): OVS or Linux mode bridges are not required. Result: Ceph nodes should be configured to use either interfaces or Linux bonds for highest performance.
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Description Dan Sneddon 2018-04-18 23:33:57 UTC 
Description of problem:
OSP includes very basic NIC config examples for just a few configurations. None of the included configurations are appropriate examples for a production Ceph deployment.

Version-Release number of selected component (if applicable):
OSP 13 and previous versions

Actual results:
The included sample NIC configs are not optimized for Ceph. Only the multiple-nics version of the templates have storage interfaces that are not on a bridge. Bridges are not required for most use cases when using Ceph, and by not using bridges there is more CPU available for Ceph.

Expected results:
At least one example (perhaps more than one) should illustrate a production Ceph use case.

Additional info:
We should also document that bridges are not usually required for Ceph (except when using OVS bonds, which are less common than Linux bonds).
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