11:22 p.m.
Hi
I wanted to find out if there is way to list all the running processes in a
guest VM from the hypervisor. Like the output of 'ps -ef' from inside the
guest VM, but without logging in or ssh into it.
Thanks
dtsweval
9:52 a.m.
On 20.04.2015 06:22, dt sweval wrote:
Hi
I wanted to find out if there is way to list all the running processes in a
guest VM from the hypervisor. Like the output of 'ps -ef' from inside the
guest VM, but without logging in or ssh into it.
No, I don't think there's a way. Problem is, libvirt views guest
internals private to the guest. Having said that, I don't think there
ever will be an API for that. Nor qemu-ga has an API for executing an
arbitrary shell commands.
Michal
11:22 a.m.
As I know, you can use Libvmi API to access the memory of VM and then walk through the
double-linked list of process to reconstruct the process list. it is easy, and libvmi has
provide the example
在2015-04-20 22:52:02,hanyandong<hanyandong@iie.ac.cn>写道：
On 20.04.2015 06:22, dt sweval wrote:
> Hi
> I wanted to find out if there is way to list all the running processes in a
> guest VM from the hypervisor. Like the output of 'ps -ef' from inside the
> guest VM, but without logging in or ssh into it.
No, I don't think there's a way. Problem is, libvirt views guest
internals private to the guest. Having said that, I don't think there
ever will be an API for that. Nor qemu-ga has an API for executing an
arbitrary shell commands.
Michal
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10:04 p.m.
On 04/20/2015 07:32 PM, hanyandong wrote:
[please don't top-post on technical lists]
As I know, you can use Libvmi API to access the memory of VM and
then walk through the double-linked list of process to reconstruct the process list. it is
easy, and libvmi has provide the example
Maybe so, but that requires very intimate knowledge of the exact kernel
running in the guest, and could be rather fragile; especially if you are
not freezing the guest while snooping memory. Adding a guest-agent
command would probably be more portable across a wider range of guests.
> No, I don't think there's a way. Problem is, libvirt
views guest
> internals private to the guest. Having said that, I don't think there
> ever will be an API for that. Nor qemu-ga has an API for executing an
> arbitrary shell commands.
There have been proposals on the qemu list for adding such a qemu-ga
command, although it hasn't been reviewed for inclusion yet.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
11 p.m.
On Mon, Apr 20, 2015 at 8:04 PM, Eric Blake <eblake(a)redhat.com> wrote:
On 04/20/2015 07:32 PM, hanyandong wrote:
[please don't top-post on technical lists]
> As I know, you can use Libvmi API to access the memory of VM and then
walk through the double-linked list of process to reconstruct the process
list. it is easy, and libvmi has provide the example
Maybe so, but that requires very intimate knowledge of the exact kernel
running in the guest, and could be rather fragile; especially if you are
not freezing the guest while snooping memory. Adding a guest-agent
command would probably be more portable across a wider range of guests.
I agree with that, even though this might work, but might require very
kernel specific code. Probably not the road that I would
want to go down. Nevertheless, Yandong, appreciate the suggestion.
>> No, I don't think there's a way. Problem is, libvirt views guest
>> internals private to the guest. Having said that, I don't think there
>> ever will be an API for that. Nor qemu-ga has an API for executing an
>> arbitrary shell commands.
There have been proposals on the qemu list for adding such a qemu-ga
command, although it hasn't been reviewed for inclusion yet.
Thanks Eric for the pointer, do you know if it is on the roadmap or some
kind of plan though ?
Michal, thanks for your response too.
Regards
dtsweval
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
11:22 a.m.
this is the libvmi API: https://github.com/libvmi/libvmi
this is the example :
https://github.com/libvmi/libvmi/blob/master/examples/process-list.c
--
Best Regards,
yandong
-----原始邮件-----
发件人: "Michal Privoznik" <mprivozn(a)redhat.com>
发送时间: 2015年4月20日 星期一
收件人: "dt sweval" <dtsweval(a)gmail.com>, libvirt-users(a)redhat.com
抄送:
主题: Re: [libvirt-users] libvirt and guest processes
On 20.04.2015 06:22, dt sweval wrote:
> Hi
> I wanted to find out if there is way to list all the running processes in a
> guest VM from the hypervisor. Like the output of 'ps -ef' from inside the
> guest VM, but without logging in or ssh into it.
No, I don't think there's a way. Problem is, libvirt views guest
internals private to the guest. Having said that, I don't think there
ever will be an API for that. Nor qemu-ga has an API for executing an
arbitrary shell commands.
Michal
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Michal Privoznik