Re: [CentOS-virt] Should I switch and if so what is the procedure
How hard is it to switch from Xen to KVM? On Wed, Oct 5, 2011 at 11:02 AM, Manuel Wolfshant wo...@nobugconsulting.rowrote: On 10/05/2011 05:55 PM, Rich wrote: Since the Xen and Linux kernel people have finally made peace and Xen is going to be included with the kernel, should I keep using the Xen virtual server with Centos or should I switch to KVM? I am running Centos 5.7 now. I guess the real question is can I still use Xen with Centos 6? I doubt that xen will be included as an option for RHEL 6 any time soon. So neither will it be for CentOS 6. ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Should I switch and if so what is the procedure
you recreate the VIM and export the disks. -- Nehemiah I. Dacres Saint Louis University: Advanced Technology Group Linux System Administrator Sent with Sparrow (http://www.sparrowmailapp.com/?sig) On Wednesday, October 5, 2011 at 10:06 AM, Rich wrote: How hard is it to switch from Xen to KVM? On Wed, Oct 5, 2011 at 11:02 AM, Manuel Wolfshant wo...@nobugconsulting.ro (mailto:wo...@nobugconsulting.ro) wrote: On 10/05/2011 05:55 PM, Rich wrote: Since the Xen and Linux kernel people have finally made peace and Xen is going to be included with the kernel, should I keep using the Xen virtual server with Centos or should I switch to KVM? I am running Centos 5.7 now. I guess the real question is can I still use Xen with Centos 6? I doubt that xen will be included as an option for RHEL 6 any time soon. So neither will it be for CentOS 6. ___ CentOS-virt mailing list CentOS-virt@centos.org (mailto:CentOS-virt@centos.org) http://lists.centos.org/mailman/listinfo/centos-virt ___ CentOS-virt mailing list CentOS-virt@centos.org (mailto:CentOS-virt@centos.org) http://lists.centos.org/mailman/listinfo/centos-virt ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Should I switch and if so what is the procedure
On 10/05/2011 06:06 PM, Rich wrote: How hard is it to switch from Xen to KVM? http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6-Beta/html/Virtualization_Getting_Started_Guide/ ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Should I switch and if so what is the procedure
On 10/5/11 8:02 AM, Manuel Wolfshant wrote: I doubt that xen will be included as an option for RHEL 6 any time soon. So neither will it be for CentOS 6. not impossible that CentOS could have it as a value-add: http://lists.centos.org/pipermail/centos-virt/2011-July/002554.html I'm still running dom0 on CentOS 5 and am switching VMs and bare-metal non-Xen servers to 6. I figure I have enough time to wait to see what happens in 6.x (or 7?) before I will start worrying about 5 EOL. So long as I have hardware support I guess. Eric ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Should I switch and if so what is the procedure
On Wed, 2011-10-05 at 10:55 -0400, Rich wrote: Since the Xen and Linux kernel people have finally made peace and Xen is going to be included with the kernel, should I keep using the Xen virtual server with Centos or should I switch to KVM? I am running Centos 5.7 now. I guess the real question is can I still use Xen with Centos 6? The support end of life for CentOS 5 is listed as March 31, 2014 (http://wiki.centos.org/FAQ/General#head-fe8a0be91ee3e7dea812e8694491e1dde5b75e6d). There isn't any pressure, at this point, to convert your VM hosts to CentOS 6 unless there is some feature you require. I doubt RH will add XEN support to RHEL 6. They don't like to add functionality to an existing product. We can hope they bring XEN back in RHEL 7. There was some discussion about producing RPMs to add XEN support into CentOS 6, but I haven't seen any status updates, recently. ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Should I switch and if so what is the procedure
On Wed, Oct 5, 2011 at 7:16 PM, Ed Heron e...@heron-ent.com wrote: There was some discussion about producing RPMs to add XEN support into CentOS 6, but I haven't seen any status updates, recently. I am succesfully using the dom0 EL6 kernel from: http://xenbits.xen.org/people/mayoung/testing/x86_64/ and xen4 packages for EL6 by provided by this repositry: http://xenbits.xen.org/people/mayoung/EL6.xen/ It would be great to get at least the dom0 kernel in the centosplus repo... Regards, Peter ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] kvm-qemu: unable to execute QEMU command savevm (monitor missing?)
On Tue, Oct 4, 2011 at 7:42 PM, Jason Brian Friedrich m...@friedrich.org.uk
wrote:
Hey Trey,
just a quick update. If you add the CR repo for CentOS 6.0 you will
get an updated RPM which solves the problem for me.
- Jason
On Tue, Oct 4, 2011 at 01:43, Trey Dockendorf treyd...@gmail.com wrote:
On Tue, Sep 27, 2011 at 6:48 AM, Jason Brian Friedrich
m...@friedrich.org.uk wrote:
System: CentOS Linux release 6.0 (final)
Kernel: 2.6.32-71.23.1.el6.x86_64
KVM: QEMU PC emulator version 0.12.1 (qemu-kvm-0.12.1.2)
Libvirt: ibvirtd (libvirt) 0.8.1
Hi everyone,
I only recently subscribed to this list and hope you can shed some
light on the following error. I created a VM on my Centos 6 KVM
machine, used a qcow2 image and wanted to create a snapshot via 'virsh
snapshot-create' command:
//
[root@kvmhost ~]# virsh snapshot-create server01
error: internal error unable to execute QEMU command 'savevm': The
command savevm has not been found
\\
I googled before the post, found some [0] threads [1], but could not
find an answer how to solve the problem. If the kvm-qemu lacks the
support of a savevm monitor, how can I add one? Do I need to recompile
kvm-qemu with special flags or is simply a RPM package or a module
missing?
Thanks in advance,
- Jason
[0] http://lists.centos.org/pipermail/centos-virt/2011-July/002557.html
[1]
https://www.redhat.com/archives/libvirt-users/2011-August/msg00011.html
___
CentOS-virt mailing list
CentOS-virt@centos.org
http://lists.centos.org/mailman/listinfo/centos-virt
I ran into this too. Unfortunately I haven't found a solution either,
but
here's an interesting bug report that shows this effects all the way up
to
Fedora 15, https://bugzilla.redhat.com/show_bug.cgi?id=727709. The one
fix
mentioned 89241fe0, I've actually patched into the CentOS libvirt RPM,
but
from testing it doesn't seem to be enough. I now can run the
snapshot-create
command without error, but nothing appears to happen. I've tested
creating
files, taking a snapshot, deleting files and reverting and nothing comes
back or changes. Also the qcow2 images don't change at all during this
time
either. I'm working on applying the other commits mentioned in Comment
#4,
but am running into problems since most of those commits are 0.9.0+ and
I'm
patching CentOS's 0.8.1.
I'd love to know if anyone actually has snapshots working in CentOS 5 or
6.
This is kind of a critical feature to the entire virtualization process.
- Trey
___
CentOS-virt mailing list
CentOS-virt@centos.org
http://lists.centos.org/mailman/listinfo/centos-virt
___
CentOS-virt mailing list
CentOS-virt@centos.org
http://lists.centos.org/mailman/listinfo/centos-virt
Awesome thanks for the info!
Unfortunately I hit a new error, very related it seems to the original
problem, but then I get this error
---
# virsh snapshot-create CentOSVM_0
error: operation failed: failed to take snapshot using command 'savevm
1317846732'
In full debug output I see it failover to HMP, but this is what appears to
be the relevant debug info. If the full debug is desired let me know (it's
like 1000 lines long spanning 1 second)
---
15:27:12.473: 8080: debug : qemuMonitorJSONIOProcessLine:116 : Line
[{error: {class: CommandNotFound, desc: The command
human-monitor-command has not been found, data: {name:
human-monitor-command}}}]
15:27:12.473: 8080: debug : virJSONValueFromString:933 : string={error:
{class: CommandNotFound, desc: The command human-monitor-command has
not been found, data: {name: human-monitor-command}}}
This was with libvirt-0.8.7-18.el6_1.1 from CentOS 6 CR. I restarted the
libvirtd daemon after the upgrade, still same result. Restarted the VM also
, still same. I only updated libvirt, libvirt-client and libvirt-python
from CR, haven't done a full system update. I'll try the full update next,
but any suggestions are welcome in the mean time.
Thanks
- Trey
___
CentOS-virt mailing list
CentOS-virt@centos.org
http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Should I switch and if so what is the procedure
On 10/05/2011 06:16 PM, Ed Heron wrote: On Wed, 2011-10-05 at 10:55 -0400, Rich wrote: Since the Xen and Linux kernel people have finally made peace and Xen is going to be included with the kernel, should I keep using the Xen virtual server with Centos or should I switch to KVM? I am running Centos 5.7 now. I guess the real question is can I still use Xen with Centos 6? The support end of life for CentOS 5 is listed as March 31, 2014 (http://wiki.centos.org/FAQ/General#head-fe8a0be91ee3e7dea812e8694491e1dde5b75e6d). There isn't any pressure, at this point, to convert your VM hosts to CentOS 6 unless there is some feature you require. I doubt RH will add XEN support to RHEL 6. They don't like to add functionality to an existing product. We can hope they bring XEN back in RHEL 7. While Xen will probably return in RHEL 7 simply because it is part of the upstream kernel now I doubt it will be officially supported by Red Hat. Between buying Qumranet (http://www.redhat.com/promo/qumranet/) and now Gluster (https://www.redhat.com/promo/storage/) it is clear that Red Hat aims to become a provider of a complete independent virtualization stack and is unlikely to support competing products directly. The question is what does Xen offer that KVM cannot provide? Looking at the slides of the KVM Forum 2011 (http://www.linux-kvm.org/page/KVM_Forum_2011) there seem to be many interesting improvements in the pipeline so at some point the question really is why hold on to Xen at all when there is not real reason to? Regards, Dennis ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
