On 27.02.2014 23:15, Edison Su wrote:
As we discussed[1][2] before, in ACS release, by default, there is no
live volume snapshot for KVM, due to starting from 6.5, qemu-img can't
recognize "-s", which used by CloudStack to backup snapshot.
One possible solution, to bring the function back, is to build a
separate qemu-img rpm from 6.5 with "-s" support, we can name the rpm
as "cloudstack-qemu-img-extra" or whatever, and make sure this rpm
won't overwrite anything installed on the system, so that won't break
RHEL supportability(if anybody care).
The changes we need:
1. Build a RPM with "-s" support
2. Push the RPM to a public repo
3. During KVM agent installation procedure, need to install
above RPM after KVM agent installed. This step can be either manually,
or automatically.
Any comments on above steps?
[1] http://markmail.org/message/b57vbbvjzp5g2562
[2]
http://www.nux.ro/archive/2014/01/Taking_KVM_volume_snapshots_with_Cloudstack_4_2_on_CentOS_6_5.html
To be honest I'm quite comfortable with leveraging manually the
"cloud-qemu-img" functionality in ACS as per my blog post, of course
large deployments can script this via ansible/puppet/etc; shipping it
via RPM might require a bit of effort but it's doable, too.
This will not be an issue with EL7 AFAIK. I don't know what got into RH
with this change, it also was not fair play on the oVirt people.
Lucian
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www.nux.ro
