[Users] Copy VM to external disk and import back
Hello, I did some updates to my test installation from an unofficial repo (I had installed a compile version of qemu-kvm-rhev from a private repo). After rebooting, I was encountering errors with adding networks (when I tried to save, it would say that my already-exisiting networks were being added twice) Anyway, not sure what exactly broke, as there were some other oVirt updates as well. I was planning on just wiping my all-in-one install and starting from scratch, but I first wanted to see if it was possible to copy my Win7 VM to an external USB drive, then import it back in after I have a fresh all-in-one install? I already have an export domain and have tested exporting one of my other VMs, but am not sure if I would then be able to: 1.) Copy the resulting directory to external storage 2.) Do my fresh install 3.) Copy the directory from external storage to my new export domain 4,) Import the VM from the export domain I guess my question is, is the export domain like the ISO domain: can I copy files directly to it (with the appropriate metadata, of course) and after a few minutes, have oVirt able to automatically see the contents and be able to import it back in. Thanks! :-) -Alan ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] Copy VM to external disk and import back
yes. You can copy files to and from the export domain. You can also just detach ir, and attach it to the installation later. On Jan 25, 2014 10:37 AM, Alan Murrell li...@murrell.ca wrote: Hello, I did some updates to my test installation from an unofficial repo (I had installed a compile version of qemu-kvm-rhev from a private repo). After rebooting, I was encountering errors with adding networks (when I tried to save, it would say that my already-exisiting networks were being added twice) Anyway, not sure what exactly broke, as there were some other oVirt updates as well. I was planning on just wiping my all-in-one install and starting from scratch, but I first wanted to see if it was possible to copy my Win7 VM to an external USB drive, then import it back in after I have a fresh all-in-one install? I already have an export domain and have tested exporting one of my other VMs, but am not sure if I would then be able to: 1.) Copy the resulting directory to external storage 2.) Do my fresh install 3.) Copy the directory from external storage to my new export domain 4,) Import the VM from the export domain I guess my question is, is the export domain like the ISO domain: can I copy files directly to it (with the appropriate metadata, of course) and after a few minutes, have oVirt able to automatically see the contents and be able to import it back in. Thanks! :-) -Alan ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
[Users] Hosted-engine runtime issues (3.4 BETA)
Hi, finally I've got the new hosted-engine feature running on RHEL6 using oVirt 3.4 BETA/nightly. I've come across a few issues and wanted to clarify if this is the desired behaviour: 1.) hosted-engine storage domain not visible in GUI The NFS-Storage I've used to install the hosted-engine is not visible in oVirt's Admin Portal. Though it is mounted on my oVirt Node below /rhev/data-center/mnt/. I tried to import this storage domain, but apparently this fails because it's already mounted. Is there any way to make this storage domain visible? 2.) hosted-engine VM device are not visible in GUI The disk and network devices are not visible in the admin portal. Thus I'm unable to change anything. Is this intended? If so, how am I supposed to make changes? 3.) move hosted-engine VM to a different storage Because of all of the above I seem to be unable to move my hosted-engine VM to a different NFS-Storage. How can this be done? Thanks - Frank ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
[Users] Reboot causes poweroff of VM 3.4 Beta
Hi, Seem to be suffering an issue in 3.4 where if a vm is rebooted it actually shuts down, this occurs for all guests regardless of OS installed within. Anyone seen this? Jon ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] Copy VM to external disk and import back
On Sat, 2014-01-25 at 12:42 +0200, Itamar Heim wrote: yes. You can copy files to and from the export domain. OK, good to know. So basically as long as I keep everything in tact (the meta file, etc.), then there should be no problem in getting it imported back in. -Alan ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] Reboot causes poweroff of VM 3.4 Beta
Please attach engine.log and vdsm.log On Jan 25, 2014 5:59 PM, Jon Archer j...@rosslug.org.uk wrote: Hi, Seem to be suffering an issue in 3.4 where if a vm Hi, Seem to be suffering an issue in 3.4 where if a vm is rebooted it actually shuts down, this occurs for all guests regardless of OS installed within. Anyone seen this? Jon ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] [vdsm] The machine type of one cluster
On 01/25/2014 04:23 AM, Kewei Yu wrote: Hi all: There is a machine type in cluster, It will decide which machine of Qemu will be used, When we add the first host into cluster, a default machine type is shown. We can correct the DB's value of the engine to set the machine type. I just want to know how dose cluster choice the default machine? It is decided by VDSM? Qemu? or It is only fixed value in engine's DB? Regard Kewei ___ vdsm-devel mailing list vdsm-de...@lists.fedorahosted.org https://lists.fedorahosted.org/mailman/listinfo/vdsm-devel basically, for fedora its 'pc', which may have some live migration issues between different versions in the same cluster. for .el6, its 'rhel63/rhel64/rhel65/etc.', which is a stable definition of emulation mode for the cluster (i.e., even a .el7 host should live migrate to .el6 if we specify its emulation mode as rhel65, etc.) engine defines per cluster level the expected emulation mode. vdsm reports from libvirt from qemu, so engine can check the host is a match. if the first host in the cluster is fedora, it will be set to 'pc', if its .el6, it will be set to the 'rhelxx' option. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] Hosted-engine runtime issues (3.4 BETA)
On 01/25/2014 03:43 PM, Frank Wall wrote: Hi, finally I've got the new hosted-engine feature running on RHEL6 using oVirt 3.4 BETA/nightly. I've come across a few issues and wanted to clarify if this is the desired behaviour: 1.) hosted-engine storage domain not visible in GUI The NFS-Storage I've used to install the hosted-engine is not visible in oVirt's Admin Portal. Though it is mounted on my oVirt Node below /rhev/data-center/mnt/. I tried to import this storage domain, but apparently this fails because it's already mounted. Is there any way to make this storage domain visible? not yet. 2.) hosted-engine VM device are not visible in GUI The disk and network devices are not visible in the admin portal. Thus I'm unable to change anything. Is this intended? If so, how am I supposed to make changes? the VM should be visible, the disk/nics - not yet. 3.) move hosted-engine VM to a different storage Because of all of the above I seem to be unable to move my hosted-engine VM to a different NFS-Storage. How can this be done? not yet (from the webadmin). if you shutdown the engine and fix the config manually, should be doable. Thanks - Frank ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] Extremely poor disk access speeds in Windows guest
Thanks for the responses everyone, really appreciate it. I've condensed the other questions into this reply. Steve, What is the CPU load of the GlusterFS host when comparing the raw brick test to the gluster mount point test? Give it 30 seconds and see what top reports. You’ll probably have to significantly increase the count on the test so that it runs that long. - Nick Gluster mount point: *4K* on GLUSTER host [root@gluster1 rep2]# dd if=/dev/zero of=/mnt/rep2/test1 bs=4k count=50 50+0 records in 50+0 records out 204800 bytes (2.0 GB) copied, 100.076 s, 20.5 MB/s Top reported this right away: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 1826 root 20 0 294m 33m 2540 S 27.2 0.4 0:04.31 glusterfs 2126 root 20 0 1391m 31m 2336 S 22.6 0.4 11:25.48 glusterfsd Then at about 20+ seconds top reports this: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 1826 root 20 0 294m 35m 2660 R 141.7 0.5 1:14.94 glusterfs 2126 root 20 0 1392m 31m 2344 S 33.7 0.4 11:46.56 glusterfsd *4K* Directly on the brick: dd if=/dev/zero of=test1 bs=4k count=50 50+0 records in 50+0 records out 204800 bytes (2.0 GB) copied, 4.99367 s, 410 MB/s 7750 root 20 0 102m 648 544 R 50.3 0.0 0:01.52 dd 7719 root 20 0 000 D 1.0 0.0 0:01.50 flush-253:2 Same test, gluster mount point on OVIRT host: dd if=/dev/zero of=/mnt/rep2/test1 bs=4k count=50 50+0 records in 50+0 records out 204800 bytes (2.0 GB) copied, 42.4518 s, 48.2 MB/s PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 2126 root 20 0 1396m 31m 2360 S 40.5 0.4 13:28.89 glusterfsd Same test, on OVIRT host but against NFS mount point: dd if=/dev/zero of=/mnt/rep2-nfs/test1 bs=4k count=50 50+0 records in 50+0 records out 204800 bytes (2.0 GB) copied, 18.8911 s, 108 MB/s PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 2141 root 20 0 550m 184m 2840 R 84.6 2.3 16:43.10 glusterfs 2126 root 20 0 1407m 30m 2368 S 49.8 0.4 13:49.07 glusterfsd Interesting - It looks like if I use a NFS mount point, I incur a cpu hit on two processes instead of just the daemon. I also get much better performance if I'm not running dd (fuse) on the GLUSTER host. The storage servers are a bit older, but are both dual socket quad core opterons with 4x 7200rpm drives. A block size of 4k is quite small so that the context switch overhead involved with fuse would be more perceivable. Would it be possible to increase the block size for dd and test? I'm in the process of setting up a share from my desktop and I'll see if I can bench between the two systems. Not sure if my ssd will impact the tests, I've heard there isn't an advantage using ssd storage for glusterfs. Do you have any pointers to this source of information? Typically glusterfs performance for virtualization work loads is bound by the slowest element in the entire stack. Usually storage/disks happen to be the bottleneck and ssd storage does benefit glusterfs. -Vijay I had a couple technical calls with RH (re: RHSS), and when I asked if SSD's could add any benefit I was told no. The context may have been in a product comparison to other storage vendors, where they use SSD's for read/write caching, versus having an all SSD storage domain (which I'm not proposing, but which is effectively what my desktop would provide). Increasing bs against NFS mount point (gluster backend): dd if=/dev/zero of=/mnt/rep2-nfs/test1 bs=128k count=16000 16000+0 records in 16000+0 records out 2097152000 bytes (2.1 GB) copied, 19.1089 s, 110 MB/s GLUSTER host top reports: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 2141 root 20 0 550m 183m 2844 R 88.9 2.3 17:30.82 glusterfs 2126 root 20 0 1414m 31m 2408 S 46.1 0.4 14:18.18 glusterfsd So roughly the same performance as 4k writes remotely. I'm guessing if I could randomize these writes we'd see a large difference. Check this thread out, http://raobharata.wordpress.com/2012/10/29/qemu-glusterfs-native-integration/ it's quite dated but I remember seeing similar figures. In fact when I used FIO on a libgfapi mounted VM I got slightly faster read/write speeds than on the physical box itself (I assume because of some level of caching). On NFS it was close to half.. You'll probably get a little more interesting results using FIO opposed to dd ( -Andrew) Sorry Andrew, I meant to reply to your other message - it looks like CentOS 6.5 can't use libgfapi right now, I stumbled across this info in a couple threads. Something about how the CentOS build has different flags set on build for RHEV snapshot support then RHEL, so native gluster storage domains are disabled because snapshot support is assumed and would break otherwise. I'm assuming this is still valid as I cannot get a storage
Re: [Users] [vdsm] The machine type of one cluster
2014/1/26 Itamar Heim ih...@redhat.com On 01/25/2014 04:23 AM, Kewei Yu wrote: Hi all: There is a machine type in cluster, It will decide which machine of Qemu will be used, When we add the first host into cluster, a default machine type is shown. We can correct the DB's value of the engine to set the machine type. I just want to know how dose cluster choice the default machine? It is decided by VDSM? Qemu? or It is only fixed value in engine's DB? Regard Kewei ___ vdsm-devel mailing list vdsm-de...@lists.fedorahosted.org https://lists.fedorahosted.org/mailman/listinfo/vdsm-devel basically, for fedora its 'pc', which may have some live migration issues between different versions in the same cluster. for .el6, its 'rhel63/rhel64/rhel65/etc.', which is a stable definition of emulation mode for the cluster (i.e., even a .el7 host should live migrate to .el6 if we specify its emulation mode as rhel65, etc.) engine defines per cluster level the expected emulation mode. vdsm reports from libvirt from qemu, so engine can check the host is a match. if the first host in the cluster is fedora, it will be set to 'pc', if its .el6, it will be set to the 'rhelxx' option. Thanks for your answer, It is helpful to me. Regard Kewei ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
[Users] The machine type of one cluster
Hi all: There is a machine type in cluster, It will decide which machine of Qemu will be used, When we add the first host into cluster, a default machine type is shown. We can correct the DB's value of the engine to set the machine type. I just want to know how dose cluster choice the default machine? It is decided by VDSM? Qemu? or It is only fixed value in engine's DB? Regard Kewei ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] [SOLVED] Guest Agent Data under Network Interfaces empty
- Original Message - From: Itamar Heim ih...@redhat.com To: Yedidyah Bar David d...@redhat.com, Joop jvdw...@xs4all.nl Cc: users users@ovirt.org, Moti Asayag masa...@redhat.com, Lior Vernia lver...@redhat.com Sent: Thursday, January 23, 2014 6:45:11 PM Subject: Re: [Users] [SOLVED] Guest Agent Data under Network Interfaces empty On 01/23/2014 04:20 PM, Yedidyah Bar David wrote: - Original Message - From: Yedidyah Bar David d...@redhat.com To: Joop jvdw...@xs4all.nl Cc: users users@ovirt.org Sent: Thursday, January 23, 2014 3:30:27 PM Subject: Re: [Users] Guest Agent Data under Network Interfaces empty - Original Message - From: Joop jvdw...@xs4all.nl Cc: users users@ovirt.org Sent: Thursday, January 23, 2014 3:25:15 PM Subject: Re: [Users] Guest Agent Data under Network Interfaces empty Yedidyah Bar David wrote: Hi all, I installed ovirt engine 3.4 beta with two VMs - one opensuse 13.1 with ovirt-guest-agent from [1] and another fedora 19 with oga from fedora. Both of them seem to work well - I can see installed applications, logged in user, memory usage. But in both of them, under Network Interfaces, the Guest Agent Data tab on the right has just headers, with no data. 'vdsClient -s 0 getAllVmStats' on the host does show such data correctly for both VMs. Am I missing anything? Is it a bug, or I should do something to get there data from the agent (through vdsm)? I'm guessing that you're missing ethtool and/or python-ethtool? (sorry can't find the right name right now) Both have python-ethtool, which is a dependency of the guest agent. And vdsm does report correctly - I am pretty certain it's a problem in the engine and not on the host/VMs. Thanks anyway, -- Didi Found https://bugzilla.redhat.com/907781, and following comment 7 there, restarted the browser (logout/login was not enough) and now it's ok. why would that be an ok behavior? I didn't say it's ok - I opened bz #1057163 for it. -- Didi ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [Users] Extremely poor disk access speeds in Windows guest
On 01/26/2014 02:37 AM, Steve Dainard wrote: Thanks for the responses everyone, really appreciate it. I've condensed the other questions into this reply. Steve, What is the CPU load of the GlusterFS host when comparing the raw brick test to the gluster mount point test? Give it 30 seconds and see what top reports. You’ll probably have to significantly increase the count on the test so that it runs that long. - Nick Gluster mount point: *4K* on GLUSTER host [root@gluster1 rep2]# dd if=/dev/zero of=/mnt/rep2/test1 bs=4k count=50 50+0 records in 50+0 records out 204800 tel:204800 bytes (2.0 GB) copied, 100.076 s, 20.5 MB/s Top reported this right away: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 1826 root 20 0 294m 33m 2540 S 27.2 0.4 0:04.31 glusterfs 2126 root 20 0 1391m 31m 2336 S 22.6 0.4 11:25.48 glusterfsd Then at about 20+ seconds top reports this: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 1826 root 20 0 294m 35m 2660 R 141.7 0.5 1:14.94 glusterfs 2126 root 20 0 1392m 31m 2344 S 33.7 0.4 11:46.56 glusterfsd *4K* Directly on the brick: dd if=/dev/zero of=test1 bs=4k count=50 50+0 records in 50+0 records out 204800 tel:204800 bytes (2.0 GB) copied, 4.99367 s, 410 MB/s 7750 root 20 0 102m 648 544 R 50.3 0.0 0:01.52 dd 7719 root 20 0 000 D 1.0 0.0 0:01.50 flush-253:2 Same test, gluster mount point on OVIRT host: dd if=/dev/zero of=/mnt/rep2/test1 bs=4k count=50 50+0 records in 50+0 records out 204800 tel:204800 bytes (2.0 GB) copied, 42.4518 s, 48.2 MB/s PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 2126 root 20 0 1396m 31m 2360 S 40.5 0.4 13:28.89 glusterfsd Same test, on OVIRT host but against NFS mount point: dd if=/dev/zero of=/mnt/rep2-nfs/test1 bs=4k count=50 50+0 records in 50+0 records out 204800 tel:204800 bytes (2.0 GB) copied, 18.8911 s, 108 MB/s PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 2141 root 20 0 550m 184m 2840 R 84.6 2.3 16:43.10 glusterfs 2126 root 20 0 1407m 30m 2368 S 49.8 0.4 13:49.07 glusterfsd Interesting - It looks like if I use a NFS mount point, I incur a cpu hit on two processes instead of just the daemon. I also get much better performance if I'm not running dd (fuse) on the GLUSTER host. The storage servers are a bit older, but are both dual socket quad core opterons with 4x 7200rpm drives. A block size of 4k is quite small so that the context switch overhead involved with fuse would be more perceivable. Would it be possible to increase the block size for dd and test? I'm in the process of setting up a share from my desktop and I'll see if I can bench between the two systems. Not sure if my ssd will impact the tests, I've heard there isn't an advantage using ssd storage for glusterfs. Do you have any pointers to this source of information? Typically glusterfs performance for virtualization work loads is bound by the slowest element in the entire stack. Usually storage/disks happen to be the bottleneck and ssd storage does benefit glusterfs. -Vijay I had a couple technical calls with RH (re: RHSS), and when I asked if SSD's could add any benefit I was told no. The context may have been in a product comparison to other storage vendors, where they use SSD's for read/write caching, versus having an all SSD storage domain (which I'm not proposing, but which is effectively what my desktop would provide). Increasing bs against NFS mount point (gluster backend): dd if=/dev/zero of=/mnt/rep2-nfs/test1 bs=128k count=16000 16000+0 records in 16000+0 records out 2097152000 tel:2097152000 bytes (2.1 GB) copied, 19.1089 s, 110 MB/s GLUSTER host top reports: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 2141 root 20 0 550m 183m 2844 R 88.9 2.3 17:30.82 glusterfs 2126 root 20 0 1414m 31m 2408 S 46.1 0.4 14:18.18 glusterfsd So roughly the same performance as 4k writes remotely. I'm guessing if I could randomize these writes we'd see a large difference. Check this thread out, http://raobharata.wordpress.com/2012/10/29/qemu-glusterfs-native-integration/ it's quite dated but I remember seeing similar figures. In fact when I used FIO on a libgfapi mounted VM I got slightly faster read/write speeds than on the physical box itself (I assume because of some level of caching). On NFS it was close to half.. You'll probably get a little more interesting results using FIO opposed to dd ( -Andrew) Sorry Andrew, I meant to reply to your other message - it looks like CentOS 6.5 can't use libgfapi right now, I stumbled across this info in a couple
