Misleading guide in configuring hosts aggregates

[Luo Gangyi]

When I follow the guide (http://docs.openstack.org/trunk/config-reference/content/section_compute-scheduler.html) to configure nova host aggregates, I got following DEBUG message in nova-schuduler log:

"
2015-04-16 09:30:47.395 1143 DEBUG nova.scheduler.filters.compute_capabilities_filter [req-66f091c4-c26f-482f-b432-cbd0f2456625 None] (node-132.domain.bcec, node-132.domain.bcec) ram:128519 disk:6240256 io_ops:0 instances:0 fails instance_type extra_specs requirements host_passes /usr/lib/python2.6/site-packages/nova/scheduler/filters/compute_capabilities_filter.py:73
2015-04-16 09:30:47.395 1143 INFO nova.filters [req-66f091c4-c26f-482f-b432-cbd0f2456625 None] Filter ComputeCapabilitiesFilter returned 0 hosts

"
Then I looked the source code, I found this problem was caused by the conflict of ComputeCapabilitiesFilter and AggregateInstanceExtraSpecsFilter if we did not use scope in extra_specs.

In official guide, it use "$ nova flavor-key ssd.large set ssd=true" which may cause conflict with ComputeCapabilitiesFilter！

In fact, we should use "$ nova flavor-key ssd.large set aggregate_instance_extra_specs:ssd=true" instead.

[Luo Gangyi (luogangyi)]

I have submit a patch https://review.openstack.org/#/c/175282/
Please review it.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/175282
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=1583bace505fe26699d63e92edbb2e4c9810bb79
Submitter: Jenkins
Branch: master

commit 1583bace505fe26699d63e92edbb2e4c9810bb79
Author: Luo Gangyi <email address hidden>
Date: Mon Apr 20 00:28:44 2015 -0700

    Add scope prefix in configuring host aggregates

    Using unscoped key pairs will cause conflicts between
    ComputeCapabilitiesFilter and AggregateInstanceExtraSpecsFilter.
    And that conflicts lead to return 0 hosts of
    ComputeCapabilitiesFilter.

    This patch adds 'aggregate_instance_extra_specs' scope when
    configuring host aggregates to avoid above conflicts.

    Closes-Bug: #1445285

    Change-Id: I4af09b1a556f5f9c56fb4e6fb3098fc01fb386bf

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/openstack-manuals 15.0.0 release.