Re: [CentOS-virt] Xen CentOS 7.3 server + CentOS 7.3 VM fails to boot after CR updates (applied to VM)!
ble:0kB isolated(anon):0kB isolated(file):0kB present:15996kB > managed:15912kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB > slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB > pagetables:0kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB > free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no > [1.971217] lowmem_reserve[]: 0 4063 16028 16028 > [1.971226] Node 0 DMA32 free:4156584kB min:4104kB low:5128kB > high:6156kB active_anon:952kB inactive_anon:1924kB active_file:0kB > inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB > present:4177920kB managed:4162956kB mlocked:0kB dirty:0kB writeback:0kB > mapped:4kB shmem:1928kB slab_reclaimable:240kB slab_unreclaimable:504kB > kernel_stack:32kB pagetables:592kB unstable:0kB bounce:0kB > free_pcp:1760kB local_pcp:288kB free_cma:0kB writeback_tmp:0kB > pages_scanned:0 all_unreclaimable? no > [1.971264] lowmem_reserve[]: 0 0 11964 11964 > [1.971273] Node 0 Normal free:12091564kB min:12088kB low:15108kB > high:18132kB active_anon:2352kB inactive_anon:6272kB active_file:3164kB > inactive_file:35364kB unevictable:0kB isolated(anon):0kB > isolated(file):0kB present:12591104kB managed:12251788kB mlocked:0kB > dirty:0kB writeback:0kB mapped:5852kB shmem:6284kB > slab_reclaimable:6688kB slab_unreclaimable:6012kB kernel_stack:880kB > pagetables:1328kB unstable:0kB bounce:0kB free_pcp:1196kB > local_pcp:152kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 > all_unreclaimable? no > [1.971309] lowmem_reserve[]: 0 0 0 0 > [1.971316] Node 0 DMA: 0*4kB 1*8kB (U) 0*16kB 1*32kB (U) 2*64kB (U) > 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = > 15912kB > [1.971343] Node 0 DMA32: 7*4kB (M) 18*8kB (UM) 7*16kB (EM) 3*32kB > (EM) 1*64kB (E) 2*128kB (UM) 1*256kB (E) 4*512kB (UM) 4*1024kB (UEM) > 4*2048kB (EM) 1011*4096kB (M) = 4156348kB > [1.971377] Node 0 Normal: 64*4kB (UEM) 10*8kB (UEM) 6*16kB (EM) > 3*32kB (EM) 3*64kB (UE) 3*128kB (UEM) 1*256kB (E) 2*512kB (UE) 0*1024kB > 1*2048kB (M) 2951*4096kB (M) = 12091728kB > [1.971413] Node 0 hugepages_total=0 hugepages_free=0 > hugepages_surp=0 hugepages_size=2048kB > [1.971425] 11685 total pagecache pages > [1.971430] 0 pages in swap cache > [1.971437] Swap cache stats: add 0, delete 0, find 0/0 > [1.971444] Free swap = 0kB > [1.971451] Total swap = 0kB > [1.971456] 4196255 pages RAM > [1.971462] 0 pages HighMem/MovableOnly > [1.971467] 88591 pages reserved > Hi, Just to confirm that from our internal 7.4.1708 QA provisioning tests, kernel panics directly when trying to deploy a PV guest so 7.4.1708 isn't installable in that scenerio (that we tested in QA and it fails) -- Fabian Arrotin The CentOS Project | http://www.centos.org gpg key: 56BEC54E | twitter: @arrfab signature.asc Description: OpenPGP digital signature ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] IBM GPFS filesystem
Pasi Kärkkäinen wrote: On Fri, Dec 03, 2010 at 12:45:22PM +0530, Rajagopal Swaminathan wrote: snip You can also use normal LVM over shared iSCSI LUN, but you need to be (very) careful with running LVM management commands and getting all the nodes (dom0s) to be in sync :) (Citrix XenServer does this, but there the management toolstack takes care of the LVM command execution + state synchronization). Yes, Citrix XenServer also use LVM, but a different implementation though (with a VHD format in the LV itself) That's also true that the management toolstack takes care of the state synch and the active/inactive state of the LV -- -- Fabian Arrotin ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] IBM GPFS filesystem
Benjamin Franz wrote: On 12/02/2010 12:58 PM, compdoc wrote: []...live migration...? snip No. You need a shared filesystem. Which pretty much leaves you on either NFS or a clustered filesystem. Totally wrong ! If you have never tested it , try it (and try to understand clvmd) before saying that it doesn't work ! If you've never tried it, that means you've never played with the rhcs stack, because even if you want to put gfs/gfs2 on top, you still need clvmd to have a consistent logical volume management across all the nodes in the hypervisor cluster ... It seems to me that most people wanting to have a clusterfs (gfs/gfs2/ocfs2/whateverfs) on top of a shared storage want that just because they are used to that thing that Vmware did for a shared storage : vmfs on top of a shared storage and file-based container (.vmdk) for the virtual machines. I've installed several solutions based purely on lvm Please compare all the solutions and you'll easily find that on a performance/IO level you'll be always faster to put put extra layer between the VM storage and the shared storage -- -- Fabian Arrotin ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] VirtIO with CentOS 5.4
Bill McGonigle wrote: Hi, all, I'm attempting to run a Windows 2003 (32-bit) VM under CentOS 5.4, generally following: http://wiki.centos.org/HowTos/KVM ARGHH ... forget that page as it was written during the first kvm tests and ïsn't current anymore see http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.4/html/Virtualization_Guide/index.html for accurate documentation (as http://www.centos.org/docs is outdated and doesn't even cover kvm) I've seen nice performance benefits with the VirtIO driver under Fedora, so I'd like to get that running with CentOS as well. I have the September drivers build .iso. According to: http://www.linux-kvm.org/page/Virtio I need a KVM version 60 or later - fair enough. Back at the wiki there's a note about later KVM in -testing, and sure enough there's a -66 there, but it's only built for an old kernel. I got that SRPM and tried to build it against the current kernel, but get kmod build errors, ala: /root/rpmbuild/BUILD/kvm-kmod-66/_kmod_build_/kernel/external-module-compat.h:421: error: redefinition of typedef 'bool' ... /root/rpmbuild/BUILD/kvm-kmod-66/_kmod_build_/kernel/external-module-compat.h:734:1: warning: __aligned redefined The wiki also has a note about -84 being in Levente Farkas's repo, but those don't appear to be there any longer. So, questions: 1) what are folks generally using for VirtIO-capable KVM on CentOS 5.4? The standard kvm from 5.4 and not the *old* one from extras 2) given that the upstream has Windows drivers available, I'm curios how they're handling the issue, and if we're in sync. 3) does anybody have the SRPM that was at Farkas's repo or know if it went elsewhere? I assume the build issues have been solved there already. I'd be happy to update the Wiki with info from responses here. Thanks, -Bill -- -- Fabian Arrotin test -e /dev/human/brain || ( echo 1 /proc/sys/kernel/sysrq ; echo c /proc/sysrq-trigger ) ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Move Windows within an LV to another pv safely
Ben M. wrote: Using CentOS Xen current with the 5.4 update applied. I need to move a Windows 2008 installation in LVM2 from one pv/vg/lv to different disk pv/vg/lv. What are considered safe ways to move it on same machine and retain a copy until sure it reboots? Turn off (shutdown) in Xen create identical extents in target pv/vg/lv and mount -t ntfs and cp? dd? rsync? Or pvmove (doesn't look like it retains a copy)? Is there an equivalent to AIX cplv? I always use dd when i need to 'move' a LV from one host to the other (can be of course used on the same host) -- -- Fabian Arrotin idea=`grep -i clue /dev/brain` test -z $idea echo sorry, init 6 in progress || sh ./answer.sh ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Resizing disks for VMs
Dennis J. wrote: Hi, Is there a way to make a PV xen guest aware of a size change of the host disk? In my case I'm talking about a Centos 5.3 host using logical volumes as storage for the guests and the guests running Centos 5.3 and LVM too. What I'm trying to accomplish is to resize the logical volume for the guest by adding a few gigs and then make the guest see this change without requiring a reboot. Is this possible maybe using some kind of bus rescan in the guest? No, it's not possible unfortunately. On a traditionnal SCSI bus you can rescan the whole bus to see newer/added devices or just the device to see newer size, but not on a Xen domU . At least that's what i found when i blogged about that . See that thread on the Xen list : http://lists.xensource.com/archives/html/xen-users/2008-04/msg00246.html So what i do since then is to use lvm in the domU as well and add a new xvd block device to the domU (aka a new LV on the dom0) and then the traditionnal pvcreate/vgextend/lvextend. Working correctly for all my domU's .. -- -- Fabian Arrotin idea=`grep -i clue /dev/brain` test -z $idea echo sorry, init 6 in progress || sh ./answer.sh ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Resizing disks for VMs
Karanbir Singh wrote: On 28/09/09 17:37, Fabian Arrotin wrote: So what i do since then is to use lvm in the domU as well and add a new xvd block device to the domU (aka a new LV on the dom0) and then the traditionnal pvcreate/vgextend/lvextend. Working correctly for all my domU's .. how are you able to add a new disk without a reboot ? or is that something that works with the xenblock drivers ? Yes, i've only PV domU's ;-) virsh attach-disk /path/to/lv/on/the/domO xvd[letter as it appears on the domU] -- -- Fabian Arrotin idea=`grep -i clue /dev/brain` test -z $idea echo sorry, init 6 in progress || sh ./answer.sh ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] fully virt Xen DomU network question
Coert Waagmeester wrote: Hello all fellow CentOS users! I have a working xen setup with 3 paravirt domUs and one Windblows 2003 fully virt domU. There are to virtual networks. As far as I can tell in the paravirt Linux DomUs I have gigabit networking, but not in the fully virt Windows 2003 domU Is there a setting for this, or is it not yet supported? That's not on the dom0 side, but directly in the w2k3 domU .. : you'll get *bad* performances (at IO and network level) if the xenpv drivers for Windows aren't installed .. Unfortunately you will not be able to find them for CentOS. (While Upstream have them of course) -- -- Fabian Arrotin idea=`grep -i clue /dev/brain` test -z $idea echo sorry, init 6 in progress || sh ./answer.sh ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] lfarkas Repository + KVM on centos Wiki
Rainer Traut wrote: Dear all, I've succesfully installed a F10 x86_64 KVM guest on C5 x86_64 with the help of the wiki - running for 7 days now. :) Two questions; What's the state of the lfarkas's repository - can it be trusted - I guess yes but google did not help much. It's only mentioned in the kvm howto - not under the third party repos. And sadly http://www.lfarkas.org/ is empty. I suppose you already know that kvm will be included by default in the upcoming 5.4 release ? It will be provided only for x86_64 though (afaik ...) -- -- Fabian Arrotin idea=`grep -i clue /dev/brain` test -z $idea echo sorry, init 6 in progress || sh ./answer.sh ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] tick_divider kernel parameter for guest vm
When upstream released 5.1, everybody wanted to test a new kernel parameter that could adjust the system clock rate at boot time to something else than the standard 1000Hz clock rate. A lot of testings has been done (thanks to Akemi Yagi for her great work) and you can see the results here : http://bugs.centos.org/view.php?id=2189 As you can read at the bottom of the comments, it seems it was a typo in the official RH Release Notes : you'd have to read divider= and *NOT* tick_divider= ! (see http://www.centos.org/docs/5/html/release-notes/as-x86/RELEASE-NOTES-U1-x86-en.html) It seems so to work with the correct kernel parameter and so there is no need to build a kernel-vm for CentOS 5.1 guests .. (it's still needed for example for 4.x ..) Keep on reading the comments on bugs.centos.org for further informations ... I assume that upstream release notes will be corrected to reflect the real parameter -- Fabian Arrotin [EMAIL PROTECTED] Solution ? echo '16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlbxq' | dc signature.asc Description: This is a digitally signed message part ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
