openstack/kolla-ansible
Code Issues Proposed changes

Allow operators to change hw_disk_discard in Nova

Browse Source 
Some base image distros don't ship new enough versions of libvirt/qemu
to support hw_disk_discard in Nova (libvirt (1, 0, 6) or later and qemu
(1, 6, 0) or later).

When deploying Nova with Ceph enabled this config item is automatically
turned on, we should give operators a chance to disable it.

Change-Id: I0b2615c64a9569c09567bf456815f93254d90ade
Closes-Bug: #1632348
This commit is contained in:
Paul Bourke 2016-10-11 15:29:00 +01:00
parent bd1edb46f1
commit 0e0fedb05b
2 changed files with 7 additions and 1 deletions
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4
ansible/roles/nova/defaults/main.yml
View File

@ -13,6 +13,10 @@ nova_pool_name: "{{ ceph_nova_pool_name }}"
nova_pool_type: "{{ ceph_nova_pool_type }}"
nova_cache_mode: "{{ ceph_nova_cache_mode }}"
# Discard option for nova managed disks. Requires libvirt (1, 0, 6) or later and
# qemu (1, 6, 0) or later. Set to "" to disable.
nova_hw_disk_discard: "unmap"
####################
# Database

4
ansible/roles/nova/templates/nova.conf.j2
View File

@ -175,7 +175,9 @@ images_rbd_pool = {{ ceph_nova_pool_name }}
images_rbd_ceph_conf = /etc/ceph/ceph.conf
rbd_user = nova
disk_cachemodes="network=writeback"
hw_disk_discard = unmap
{% if nova_hw_disk_discard != '' %}
hw_disk_discard = {{ nova_hw_disk_discard }}
{% endif %}
{% endif %}
{% if nova_backend == "rbd" %}
rbd_secret_uuid = {{ rbd_secret_uuid }}