Re: [CentOS-virt] 5.1: problem opening console from vm manager

On 12/18/2007 10:46 PM, Kai Schaetzl wrote: I can also switch and login with xm console, but using the vm manager way doesn't work. (BTW: how can I switch back from a DomU console to the Dom0 console in a terminal tab? When I exit it just logs me out and presents the login message of the DomU.

Re: [CentOS-virt] How to clone a guest for cold stand by

Götz Reinicke wrote: Hi, what would be the shortest and fastest way to clone a e.g. basic Centos 5 guest for further use? For example I'd like to set up a master Mysql-server as a guest an than clone two additional slaves. I have a lvm template, i.e. a simple volume with the OS skeleton ( a

Re: [CentOS-virt] Best virtualization setup for Centos 5.2

On 01/22/2009 09:31 AM, Kai Schaetzl wrote: Dennis J. wrote on Wed, 21 Jan 2009 20:00:24 +0100: Doing a hdparm -t on the host system consistently gives me a result of about 70MB/sec yet in a KVM guest I get results ranging from 40MB/sec to 125MB/sec on each run. The higher

[CentOS-virt] Using the parallel port from domU

Hello I use xen and I am trying to use the parallel port of Centos 5.2 host from a Windows XP (HVM) guest. I have tried to transfer control of the port by blacklisting lp, parport and parport_pc + adding: ioports = [ 0378-037a ] to the xen configuration file. However, in the

Re: [CentOS-virt] Using the parallel port from domU

Short follow-up: I had to revert to the stock xen. With the newer version, Java in the VM went nuts, taking 99% of the CPU. Beats me why... /me eagerly waiting for the newer stock version Manuel Wolfshant wrote: Just for the record: due to lack of time (I am really really under

Re: [CentOS-virt] Mixed dom0/domU usage?

Dennis J. wrote: Hi, I'm wondering about the impact of using both dom0 and domU's on a server at the same time. I'm worried about the performance impact of running a Mysql server in a domU and now I'm thinking about moving the Mysql part of a LAMP setup into dom0 and running a few Apache

Re: [CentOS-virt] virtualizaton install and xen source compile on CentOS5.2

On 03/05/2009 10:14 PM, Aaron Linnen wrote: From: Jerry Amundson jamun...@gmail.com Date: 03/05/2009 01:27 PM On Thu, Mar 5, 2009 at 8:04 AM, mica fang micaf...@gmail.com wrote: Kai Schaetzl wrote on Thu, Mar 5 13:31:18 UTC 2009 why don't you use the officially

Re: [CentOS-virt] xen-3.0.3-80.el5

On 03/18/2009 01:52 AM, Shane Goulden wrote: I've realised it probably won't be available for CentOS 5.2 as it's a package for RHEL 5.3, so it will probably come with CentOS 5.3 I'm guessing..? That is correct. Centos 5.3 will ship with xen-3.0.3-80.el5 On 18/03/2009, at 10:46 AM, Shane

Re: [CentOS-virt] WinXP Xen guest: compare VNC vs RDP

On 04/22/2009 10:35 PM, Ed Heron wrote: I'm experimenting with using WinXP Xen guests as an alternative to upgrading workstations. The administrative advantages seem overwhelming. Please share thoughts about using VNC vs RDP for remote desktop connections. I had to create 6 windows

Re: [CentOS-virt] I/O load distribution

Dennis J. wrote: Hi, What is the best way to deal with I/O load when running several VMs on a physical machine with local or remote storage? What I'm primarily worried about is the case when several VMs cause disk I/O at the same time. One example would be the updatedb cronjob of the

Re: [CentOS-virt] Testing new Xen Version and rollback.

On 10/09/2009 01:57 AM, Ben M. wrote: I do not have a comprehensive grasp on startup scripts, as well as what files are not rolled into the kernel itself. In other words, I don't understand yet when a new kernel is installed, whether there are any support files that come with it, or whether

Re: [CentOS-virt] VLAN bridge config for xen - Was: Controlling allocation of ethernet devices and KVM

On 11/28/2009 12:43 AM, Tait Clarridge wrote: The init scripts support VLANs and bridges out of the box. Adding more scripts is not necessary. Interesting, XEN specific scripts? Or CentOS scripts. Neither. When using centos, vlan related modules are loaded automatically after

Re: [CentOS-virt] VLAN bridge config for xen - Was: Controlling allocation of ethernet devices and KVM

On 11/28/2009 01:05 AM, Tait Clarridge wrote: On Sat, 2009-11-28 at 00:50 +0200, Manuel Wolfshant wrote: On 11/28/2009 12:43 AM, Tait Clarridge wrote: The init scripts support VLANs and bridges out of the box. Adding more scripts is not necessary. Interesting, XEN

Re: [CentOS-virt] VLAN bridge config for xen - Was: Controlling allocation of ethernet devices and KVM

On 11/28/2009 01:24 AM, Tait Clarridge wrote: Interesting, thanks for the info. Can I specify which VLANs it is going to configure and bridge? Of course you can. It's all well documented and published at www.centos.org/docs I am well aware of the docs, must have missed that

Re: [CentOS-virt] Slightly OT: FakeRaid or Software Raid

On 12/02/2009 06:30 PM, Neil Aggarwal wrote: I have had great luck with nvidia fakeraid on RAID1, but I see there are preferences for software raid. I have always heard that fakeraid and software RAID perform the same. performance wise they are the same 'cause fakeraid is still a

Re: [CentOS-virt] Slightly OT: FakeRaid or Software Raid

On 12/02/2009 11:49 PM, Ben M. wrote: Thanks. The portability bonus is a big one. Just two other questions I think. - Raid1 entirely in dom0? that's what I do, for simplicity sake. I do all raid in Dom0, usually also LVM (sometime I do use simple/plain/old partitions in dom0 and LVM is

Re: [CentOS-virt] Slightly OT: FakeRaid or Software Raid

On 12/03/2009 03:08 AM, Grant McWilliams wrote: Personally, I never touch raid5, but then, I'm on sata. I do agree that there are benifits to hardware raid with battery backed cache if you do use raid5 (but I think raid5 is usually a mistake, unless it's all read only, in

Re: [CentOS-virt] Windows Xen VM's have high guest CPU usage and poor performance

On 01/21/2010 05:18 AM, Ryan Pugatch wrote: Hello all, I have a PowerEdge 2950 that I am using to host Windows XP VM's under CentOS. I am experiencing poor performance in the Xen VM's. Any time I try to do something, the CPU usage (as reported by the Windows task manager) hits 100% for

Re: [CentOS-virt] Windows Xen VM's have high guest CPU usage and poor performance

On 01/25/2010 07:28 PM, Pasi Kärkkäinen wrote: On Sun, Jan 24, 2010 at 09:03:58PM -0500, Ryan Pugatch wrote: Pasi Kärkkäinen wrote: Also many people are running Windows 2003 VMs on Xen without problems. -- Pasi My patch management and antivirus console machine is a Xen

Re: [CentOS-virt] Best practices for LVM and virtualization

Mathieu Baudier wrote: 3. On both host and guest This is what I always use and recommend. It doesn't have any side effects with modern software versions, except with layered Thanks! I have tried this, but I don't see how to grow the guest file system without restarting the

Re: [CentOS-virt] Best practices for LVM and virtualization

Mathieu Baudier wrote: yes, you can add / remove disks to a VM without restarting the guest. look at the xm block-attach / block-detach commands My understanding is that xm is Xen specific (I'm using Qemu/KVM) I tried with virsh: virsh # attach-disk 6

Re: [CentOS-virt] Best practices for LVM and virtualization

/mailman/listinfo/centos-virt -- Manuel Wolfshant linux registered user #131416 IT managerNoBug Consulting SRL A: Yes. Q: Are you sure? A: Because it reverses the logical flow of conversation. Q: Why is top posting frowned upon

Re: [CentOS-virt] Silly question about KVM

Scot P. Floess wrote: I was wondering, if I do not have hardware that natively supports full virtualization...and I choose to use KVM, You cannot use KVM on systems which do not support hardware virtualization will my VMs be running in some form of chip emulation (and therefore terribly

Re: [CentOS-virt] Slightly OT - Grub fallback option

On 05/18/2010 04:21 PM, Ben M. wrote: Does anyone have a standard install of CentOS virtualization grub.conf working in a proven state with the FALLBACK option? If so, can you post your grub.conf? I mistakenly updated to 5.5 and am concerned about nvidia driver comments in the release

[CentOS-virt] working config for xen which would transfer a serial interface

Hello Can anyone share a known working config for xen which would transfer a serial interface ( add-on card preferably, mine uses e880-e887 : :03:05.0 / ec00-ec07 : :03:05.0 ) to a DomU ? I've been trying with the stock packages from Centos 5.5 ( fully updated) and also

Re: [CentOS-virt] iTunes?

On 02/12/2011 11:56 PM, Lucas Timm LH wrote: Ealier was possible run iTunes in Linux using Wine. Actually I really don't know if it still works, because a lot things have changed since 2007 (was the last time I'd installed iTunes in Linux). BTW you can install VMware Workstation or Player

Re: [CentOS-virt] Network frozen in Centos 5 with Xen

x86_64 GNU/Linux ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt -- Manuel Wolfshant linux registered user #131416 IT managerNoBug Consulting SRL A: Yes. Q

Re: [CentOS-virt] Extract ip address from a kvm guest

On 04/23/2011 09:27 PM, carlopmart wrote: Arpwatch is a correct solution when host and guests are in the same network, but in my environment, they are in different nets with a firewall in the middle... I run arpwatch on the core router which sits between all VLANs

Re: [CentOS-virt] Where is my qemu command?

On 04/27/2011 02:31 PM, Kai Schaetzl wrote: I'm so glad we are still on Xen :-) Especially with para-virt CentOS running in all the VMs, anyway, it seems hardly to be beaten. except that we lack a lot of the new goodies. starting with deduplication and proper balooning

Re: [CentOS-virt] Recommendations, please

On 06/23/2011 06:28 PM, Alain Péan wrote: Le 23/06/2011 17:16, R P Herrold a écrit : I did not say the CentOS project was ** going to ship ** xen; I said: The sources that will become CentOS 6 ** will run ** xen.org virtualization as a dom0, and KVM ** may be ** excluded

Re: [CentOS-virt] Recommendations, please

On 06/23/2011 06:54 PM, Tom Bishop wrote: Russ if you have time can you elaborate more about why you are continuing to go down the Xen path, I for one would love to hear the why's and what for. I can understand the hardware requirements, and I know xen is generally going to be faster but

Re: [CentOS-virt] New to virtualization - can't use more than one CD when installing a new VM

On 06/28/2011 02:07 AM, Steve Campbell wrote: Why not use a DVD image in /var/lib/xen/images? Our company blocks bittorents due to abuse. I believe the DVD ISOs are now taking up two DVDs, so I'm not sure how I'd do this either. I'll research this a little more as I'm aware I can

Re: [CentOS-virt] Suggestions to improve this minimal kickstart config for CentOS 6?

On 07/20/2011 12:15 AM, Kartik Subbarao wrote: On 07/19/2011 12:36 PM, Kartik Subbarao wrote: rpm -e $(rpm -qa |grep -i firmware) This should be changed to: rpm -e $(rpm -qa | grep -i firmware | grep -v kernel-firmware) Since apparently kernel depends on kernel-firmware. Try the attached ks.

Re: [CentOS-virt] Suggestions to improve this minimal kickstart config for CentOS 6?

On 07/20/2011 04:48 PM, Kartik Subbarao wrote: On 07/19/2011 05:36 PM, Manuel Wolfshant wrote: Try the attached ks. It installs around 180 packages. libselinux-utils is in because I find it mandatory to be able to modify the selinux configuration of an existing system. Thanks for the info. I

Re: [CentOS-virt] Suggestions to improve this minimal kickstart config for CentOS 6?

On 07/21/2011 02:36 AM, JDF. Franklin wrote: For what it's worth here are a few more tools that I include due to fairly minimal impact, but are assumed by many 3rd party scripts for example: rsync unzip wget And personally I like these for local setup though they add a big more space:

Re: [CentOS-virt] Suggestions to improve this minimal kickstart config for CentOS 6?

On 07/21/2011 01:43 PM, Dennis Jacobfeuerborn wrote: On 07/20/2011 01:50 PM, Manuel Wolfshant wrote: On 07/20/2011 02:37 PM, Dennis Jacobfeuerborn wrote: Oh, I believe you I'm just puzzled why I need the package and you don't. Can you post an rpm -qa|sort of the final Package list you have

Re: [CentOS-virt] Suggestions to improve this minimal kickstart config for CentOS 6?

On 07/22/2011 07:01 PM, Kartik Subbarao wrote: On 07/21/2011 09:51 AM, Manuel Wolfshant wrote: http://wiki.centos.org/TipsAndTricks/KickStart Does anyone on this list have write access to that Wiki page? Since it's the #1 google search result for centos kickstart, it'd be ideal

Re: [CentOS-virt] Suggestions to improve this minimal kickstart config for CentOS 6?

As of ks file size: who cares ? You create it once and use it as many times as needed. An extra dozen or hundreds of bytes / couple of lines are not significant in this context That wasn't my point :-) I guess I could have said simpler rather than smaller to make my point clearer. The

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

Re: [CentOS-virt] Package lists for Cloud images

On 10/15/2012 01:00 PM, Karanbir Singh wrote: Hi Guys, Hoping to publish some testing images today late evening ( UTC ) - the targets I hope to hit are : [...] Also, whats the best way to publish these images in a way that they can go away once the test-phase is done ( and ideally we

Re: [CentOS-virt] Xen on CentOS 6.4

On 05/27/2013 12:10 AM, Robert Dinse wrote: What are the advantages / disadvantes of Xen / KVM? I for one have several machines where I cannot use KVM because the processors do not have support for hardware virtualization. Hence using xen there.

Re: [CentOS-virt] Xen and Centos 6.5

On 05/23/2014 12:09 AM, NightLightHosts Admin wrote: I used it and it works great. From what I remember I have to check sometimes that the xen kernel is still default. make sure /etc/sysconfig/kernel suits your needs ___ CentOS-virt mailing list

Re: [CentOS-virt] xen setup documentation for centos?

On 06/06/2014 06:23 AM, lee wrote: George Dunlap dunl...@umich.edu writes: *I* care about the documentation that didn't work, so that other people don't trip over the same thing. :-) If you've walked this path and become frustrated, there are probably a dozen other people who have also

Re: [CentOS-virt] xen setup documentation for centos?

On 06/07/2014 03:03 AM, lee wrote: Manuel Wolfshant wo...@nobugconsulting.ro writes: [..] You're right, I overlooked the 'dev'. Why doesn't the error message simply say syntax error and perhaps even points out that dev might be missing? Because the program ip is pretty cryptic, despite being

Re: [CentOS-virt] Are xen and centos incompatible?

On 06/10/2014 05:44 AM, lee wrote: [...] and xen just don't go along with each other. The server is all on debian now. The problem with incompetence is its inability to recognize itself. -- Orrin Woodward https://www.goodreads.com/author/show/249881.Orrin_Woodward, /L.I.F.E. Living

Re: [CentOS-virt] CentOS 6 VM image for paravirtualizaton on CentOS Xen server

On 03/16/2015 08:58 AM, Pasi Kärkkäinen wrote: On Sun, Mar 15, 2015 at 07:52:42PM -0700, Sarah Newman wrote: I'd really prefer to work from 'virsh' than from hand-writing xl configuration files.When I last did this sort of thing, I worked from a PXE environment that I controlled and could

Re: [CentOS-virt] CentOS 6 Xen package update (including XSA-156)

On 11/12/2015 04:00 PM, George Dunlap wrote: To update to the new repository structure, install the centos-release-xen package directly from the new repo: yum updatehttp://mirror.centos.org/centos/6/virt/x86_64/xen/centos-release-xen-7-11.el6.x86_64.rpm This should replace the xen4

Re: [CentOS-virt] CentOS 6 Xen package update (including XSA-156)

On 11/12/2015 04:44 PM, George Dunlap wrote: Do you have the centos-extras repo enabled? The key in question is in the centos-release-virt-common package, which is in the centos-extras repo I've just updated, so far so good. ___ CentOS-virt mailing

Re: [CentOS-virt] CentOS 6 Xen package update (including XSA-156)

On 12 noiembrie 2015 16:44:55 EET, George Dunlap wrote: >Do you have the centos-extras repo enabled? The key in question is in >the centos-release-virt-common package, which is in the centos-extras >repo. > > -George no, i normally keep everything but base,updates (and

Re: [CentOS-virt] CentOS 6 Xen package update (including XSA-156)

On 11/18/2015 02:08 PM, Pasi Kärkkäinen wrote: Hello, On Sun, Nov 15, 2015 at 06:42:18PM +0200, Pasi Kärkkäinen wrote: On Sun, Nov 15, 2015 at 02:04:58PM +0200, Pasi Kärkkäinen wrote: On Thu, Nov 12, 2015 at 02:00:27PM +, George Dunlap wrote: So going forward, we're moving the CentOS 6

Re: [CentOS-virt] CentOS 6 Virt SIG Xen 4.6 packages available in centos-virt-xen-testing

On 01/14/2016 06:57 PM, George Dunlap wrote: As mentioned yesterday, Xen 4.6 packages are now available for testing. These also include an update to libvirt 1.3.0, in line with what's available for CentOS 7. Please test, particularly the upgrade if you can, and report any problems here. To

Re: [CentOS-virt] [QEMU-KVM] Centos guest VM freezing

On 1/9/19 10:24 AM, Akshar Kanak wrote: Dear team     I am running a centos guest VM  which freezes for every few days . The qemu-kvm on  shows 100% cpu utilization.     Ping to the guest might work or may not work .Please can you tell me what approach can i take to debug it .     using "virsh

Re: [CentOS-virt] [QEMU-KVM] Centos guest VM freezing

condition of the guest vm when the freeze happened How can we analyse the core file generated by "virsh dump " http://bfy.tw/LhMS might help with that Regards,     manuel Thanks and regards Akshar On Wed, Jan 9, 2019 at 1:58 PM Manuel Wolfshant mailto:wo...@nobugconsulting.

[CentOS-virt] very low performance of Xen guests

Hello     For the past months I've been testing upgrading my Xen hosts to CentOS 7 and I face an issue for which I need your help to solve.     The testing machines are IBM blades, model H21 and H21XM. Initial tests were performed on the H21 with 16 GB RAM; during the last 6=7 weeks I've

Re: [CentOS-virt] very low performance of Xen guests

On 6/15/20 2:46 PM, Stephen John Smoogen wrote: On Sun, 14 Jun 2020 at 14:49, Manuel Wolfshant mailto:wo...@nobugconsulting.ro>> wrote: Hello     For the past months I've been testing upgrading my Xen hosts to CentOS 7 and I face an issue for which I need your help to

Re: [CentOS-virt] very low performance of Xen guests

On 6/15/20 5:40 PM, Stephen John Smoogen wrote: On Mon, 15 Jun 2020 at 09:42, Manuel Wolfshant mailto:wo...@nobugconsulting.ro>> wrote: On 6/15/20 2:46 PM, Stephen John Smoogen wrote: I got inspired by Adi's earlier suggestion and after reading https://access.redh