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Posted to issues@cloudstack.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2015/10/27 11:08:28 UTC
[jira] [Commented] (CLOUDSTACK-8715) Add support for
qemu-guest-agent to libvirt provider
[ https://issues.apache.org/jira/browse/CLOUDSTACK-8715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14976137#comment-14976137 ]
ASF GitHub Bot commented on CLOUDSTACK-8715:
--------------------------------------------
GitHub user wido opened a pull request:
https://github.com/apache/cloudstack/pull/985
CLOUDSTACK-8715: Add VirtIO channel to all Instances for the Qemu Gue…
…st Agent
This commit adds a additional VirtIO channel with the name 'org.qemu.guest_agent.0'
to all Instances.
With the Qemu Guest Agent the Hypervisor gains more control over the Instance if
these tools are present inside the Instance, for example:
* Power control
* Flushing filesystems
In the future this should allow safer snapshots on KVM since we can instruct the
Instance to flush the filesystems prior to snapshotting the disk.
More information: http://wiki.qemu.org/Features/QAPI/GuestAgent
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wido/cloudstack CLOUDSTACK-8715
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/cloudstack/pull/985.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #985
----
commit 10447b262c30d03bc50cfba869d6e0c5957d8926
Author: Wido den Hollander <wi...@widodh.nl>
Date: 2015-10-27T10:03:49Z
CLOUDSTACK-8715: Add VirtIO channel to all Instances for the Qemu Guest Agent
This commit adds a additional VirtIO channel with the name 'org.qemu.guest_agent.0'
to all Instances.
With the Qemu Guest Agent the Hypervisor gains more control over the Instance if
these tools are present inside the Instance, for example:
* Power control
* Flushing filesystems
In the future this should allow safer snapshots on KVM since we can instruct the
Instance to flush the filesystems prior to snapshotting the disk.
More information: http://wiki.qemu.org/Features/QAPI/GuestAgent
----
> Add support for qemu-guest-agent to libvirt provider
> ----------------------------------------------------
>
> Key: CLOUDSTACK-8715
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8715
> Project: CloudStack
> Issue Type: New Feature
> Security Level: Public(Anyone can view this level - this is the default.)
> Components: KVM
> Reporter: Sten Spans
> Labels: kvm, libvirt, qemu, systemvm
> Fix For: Future
>
>
> The qemu guest agent is a newer part of qemu/kvm/libvirt which exposes quite a lot of useful functionality, which can only be provided by having an agent on the VM. This includes things like freezing/thawing filesystems (for backups), reading files on the guest, listing interfaces / ip addresses, etc.
> This feature has been requested by users, but is currently not implemented.
> http://users.cloudstack.apache.narkive.com/3TTmy3zj/enabling-qemu-guest-agent
> The first change needed is to add the following to the XML generated for KVM virtual machines,:
> <channel type='unix'>
> <source mode='bind'/>
> <target type='virtio' name='org.qemu.guest_agent.0'/>
> </channel>
> This provides the communication channel between libvirt and the agent on the host. All in all a pretty simple change to LibvirtComputingResource.java / LibvirtVMDef.java
> Secondly the qemu-guest-agent package needs to be added to the systemvm template.
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