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Re: [libvirt-users] Strange issues with libvirt v5.5.0
by Peter Krempa 11 Jul '19

11 Jul '19

On Thu, Jul 11, 2019 at 16:46:29 +0200, Julian Sternberg wrote: > <html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hey Peter,</div> Hi, at first I'd like to ask you to CC the libvirt-users or libvir-list with such kind of questions (questions implying regression of behaviour are okay on the development list). I've CC'd libvirt-users with this reply to archive this. Also I'd strongly encourage you _not_ to use HTML formatting on thechnical communications. As you can see I'm using a plain-text mail client and it messes up. > > <div> </div> > > <div>can you give me some insight regarding this commit:<br/> > https://github.com/libvirt/libvirt/commit/7d5b283065e484645b6116397ac55b068…</div> That one does not seem to be related to your issue. It simply assumes that when starting a qemu process (so nothing really related to any of the vol-* and pool-* virsh APIs) when the disk is referencing a volume from the storage driver and the referenced volume is a directory, then we assume that qemu should use 'fat' as the driver. > > <div> </div> > > <div>I'm having strange issues since switching from libvirt 5.4.0 to 5.5.0 which is as follows:</div> > > <div> </div> I'll have to cut off everything here and replace it with a non-HTML version so there might be weird quoting: > > on libvirt 5.5.0 the volumes list only show the first image from the remote ceph rbd cluster: > > # virsh vol-list vm_volumes > Name Path > ------------------------------------------------- > vmanager101-root vm_volumes/vmanager101-root > > But the rbd command itself all seing them: > # rbd -p vm_volumes ls > vmanager101-root > vmanager102-root > vmanager103-root > vmanager105-root > > on libvirt5.4.0 everything looks correct and it shows all the existing ones: > > # virsh vol-list vm_volumes > Name Path > ------------------------------------------------- > vmanager101-root vm_volumes/vmanager101-root > vmanager102-root vm_volumes/vmanager102-root > vmanager103-root vm_volumes/vmanager103-root > vmanager105-root vm_volumes/vmanager105-root I've looked at the git history and didn't find anything that could be related here unfortunately. I'm also not very familiar with RBD in libvirt. > > Seconds strange behavior is as follow: > virsh vol-create-as vm_volumes test.img --capacity 1G --format raw > error: Failed to create vol test.img error: unsupported configuration: only RAW volumes are supported by this storage pool So this is really weird. The error message is produced if the target format is not 'raw' but the above command clearly supplies it. I'd suggest you collect debug logs while trying both and attach them here. Unfortunately I don't see what could be wrong here.

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[libvirt-users] UDP broadcasts vs. nat Masquerading issue
by Nikolai Zhubr 05 Jul '19

05 Jul '19

Hi all, I'm observing an issue that as soon as libvirt starts, UPD broadcasts going through physical network (and unrelated to any virtualization) get broken. Specifically, windows neighbourhood browsing through samba's nmbd starts suffering badly (Samba is running on this same box). At the moment I'm running a quite outdated version 1.2.9 of libvirt, but other than this issue, it does its job pretty well, so I'd first consider some patching/backporting rather than totally replacing it with a new one. Anyway, I first need to better understand what is going on and what is wrong with it. This could also be related somewhat to https://www.redhat.com/archives/libvir-list/2013-September/msg01311.html but I suppose it is not exactly that thing. I've already figured the source of trouble is anyway related to these rules added: -A POSTROUTING -o br0 -j MASQUERADE -A POSTROUTING -o enp0s25 -j MASQUERADE -A POSTROUTING -o virbr2_nic -j MASQUERADE -A POSTROUTING -o vnet0 -j MASQUERADE Here, virbr2_nic and vnet0 are used by libvirt for arranging network configurations for VMs, ok. However, br0 is a main interface of this host with primary ip address, with enp0s25 being a physical nic of this host, and it is used for all sorts of regular (unrelated to virtualization) communications. Also, br0 is used for attaching bridged (as opposed to NATed) VMs managed by libvirt. Clearly, libvirt somehow chooses to set up masquerading for literally all existing network interfaces here (except lo), but I can't see a real reason for the first two rules in the list above. Furthermore, they corrupt UDP broadcats coming from outside and reaching this host (through enp0s25/br0) such that source address gets replaced by this hosts primary address (as per masquerading). I've verified this by arranging a hand-crafted UDP listener and printing the respective source addresses as seen by normal userspace. Now I've discovered that I can "eliminate" the problem by either: 1. Removing "-A POSTROUTING -o br0 -j MASQUERADE" (manually) 2. Inserting "-A POSTROUTING -s 192.168.0.0/24 -d 192.168.0.255/32 -j ACCEPT" (Of course correcting rules by hand is not a solution, just a test) So question is, how the correct rules should ideally look like? And, is this issue known/fixed in most current libvirt? Thank you, Regards, Nikolai

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[libvirt-users] libvirt-python Create External Snapshot
by Roger Jin 04 Jul '19

04 Jul '19

Hi Libvirt, Does libvirt-python currently support the creation of external snapshots? I ran domain.snapshotCreateXML(xml) where xml is <domainsnapshot> <name>snap1</name> <description>Snapshot of OS install and updates</description> <disks> <disk name='vda'> <source file='/home/potato/libvirt/backups/test-snap1.qcow2'/> </disk> </disks> </domainsnapshot> And got the following error: if ret is None:raise libvirtError('virDomainSnapshotCreateXML() failed', dom=self) libvirt.libvirtError: unsupported configuration: disk 'vda' must use snapshot mode 'internal' Is this expected? Thanks! Sincerely, Roger Jin

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[libvirt-users] Blockpull while domain is shutoff
by Roger Jin 04 Jul '19

04 Jul '19

Hi Libvirt, Is there a command that performs the same operation as blockpull while a domain is shutoff? I have a backing chain base <-- A <-- B that I would like to shorten to base <-- B It seems like blockpull B, setting --base <path-to-base> does this, but only when the domain is running. Thanks! Sincerely, Roger Jin

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[libvirt-users] libvirt-python blockPull
by Roger Jin 03 Jul '19

03 Jul '19

Hi Libvirt, Does libvirt-python currently support adding a base path to virDomain.blockPull()? In particular, I would like to have the behavior of the following virsh command (from https://kashyapc.wordpress.com/2013/01/22/live-backup-with-external-disk-sn…) in libvirt-python: [image: image.png] Thanks! Sincerely, Roger Jin

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[libvirt-users] macvtap vlan and tcp header overhead (and mtu size)
by Marc Roos 29 Jun '19

29 Jun '19

I have a host setup for libvirt kvm/qemu vms. And I wonder a bit about the overhead of the macvtap and how to configure the mtu's properly. To be able to communicate with the host, I have moved the ip address of the host from the adapter to a macvtap to allow host communication. I have the below setup on hosts. +---------+ | macvtap0| +--| ip | | | mtu1500 | | +---------+ +---------+ | +---------+ |eth0.v100| | | macvtap1| +--| no ip +-+--| ip | +---------+ | | mtu1500 | | mtu1500 | | eth0 | | +---------+ +---------+ | +--+ | mtu9000 | | +---------+ +---------+ | |eth0.v101| +--| ip | | mtu9000 | +---------+ https://pastebin.com/9jJrMCTD I can do a ping -M do -s 9000 between hosts via the vlan interface eth0.v101. That is as expected. The ping -M do -s 1500 macvtap0 and another host or macvtap1 fails. The maximum size that does not fragment is 1472. That is 28 bytes??? Where have they gone? I am only using macvtap, can this be the combination of the parent interface being a vlan and that macvtap is not properly handling this? Anyone experienced something similar? Or can explain where these 28 bytes go?

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[libvirt-users] mkfs fails on qemu-nbd device
by Tanmoy Sinha 27 Jun '19

27 Jun '19

Hi All, I am unable to figure out the issue here, when I try to create a filesystem (ext4) on a virtual disk using qemu-nbd. This happens intermittently. Following is the sequence of commands:- $> qemu-img create -f qcow2 test.qcow2 30G $> qemu-nbd --connect=/dev/nbd0 test.qcow2 $> *mkfs.ext4 /dev/nbd0* * mkfs.ext4: Device size reported to be zero. Invalid partition specified, or* *Thu Jun 13 14:44:24 2019 partition table wasn't reread after running fdisk, due to* *Thu Jun 13 14:44:24 2019 a modified partition being busy and in use. You may need to reboot* *Thu Jun 13 14:44:24 2019 to re-read your partition table.* Following is the version details: root@localhost:~# qemu-img --version qemu-img version 2.8.1(Debian 1:2.8+dfsg-6+deb9u7) Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers root@localhost:~# qemu-nbd --version qemu-nbd version 0.0.1 Written by Anthony Liguori. Copyright (C) 2006 Anthony Liguori <anthony(a)codemonkey.ws>. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. root@localhost:~# uname -a Linux localhost 4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u2 (2019-05-13) x86_64 GNU/Linux Regards Tanmoy Sinha

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[libvirt-users] Intermittent live migration hang with ceph RBD attached volume
by Scott Sullivan 21 Jun '19

21 Jun '19

Software in use: *Source hypervisor:* *Qemu:* stable-2.12 branch *Libvirt*: v3.2-maint branch *OS*: CentOS 6 *Destination hypervisor: **Qemu:* stable-2.12 branch *Libvirt*: v4.9-maint branch *OS*: CentOS 7 I'm experiencing an intermittent live migration hang of a virtual machine (KVM) with a ceph RBD volume attached. At the high level what I see is that when this does happen, the virtual machine is left in a paused state (per virsh list) on both source and destination hypervisors indefinitely. Here's the virsh command I am running on the source (where 10.30.76.66 is the destination hypervisor): virsh migrate --live --copy-storage-all --verbose --xml > /root/live_migration.cfg test_vm qemu+ssh://10.30.76.66/system tcp:// > 10.30.76.66 Here it is in "ps faux" while its in the hung state: root 10997 0.3 0.0 380632 6156 ? Sl 12:24 0:26 > \_ virsh migrate --live --copy-storage-all --verbose --xml > /root/live_migration.cfg test_vm qemu+ssh://10.30.76.66/sys > root 10999 0.0 0.0 60024 4044 ? S 12:24 0:00 > \_ ssh 10.30.76.66 sh -c 'if 'nc' -q 2>&1 | grep "requires an argument" > >/dev/null 2>&1; then ARG=-q0;else ARG=;fi;'nc' $ARG -U The only reason i'm using the `--xml` arg is so the auth information can be updated for the new hypervisor (I setup a cephx user for each hypervisor). Below is a diff between my normal xml config and the one I passed in --xml arg to illustrate: 60,61c60,61 > < <auth username="source"> > < <secret type="ceph" > uuid="d4a47178-ab90-404e-8f25-058148da8446"/> > --- > > <auth username="destination"> > > <secret type="ceph" > uuid="72e9373d-7101-4a93-a7d2-6cce5ec1e6f1"/> The libvirt secret as shown above is properly setup with good credentials on both source and destination hypervisors. When this happens, I don't see anything logged on the destination hypervisor in the libvirt log. However in the source hypervisors log, I do see this: 2019-06-21 12:38:21.004+0000: 28400: warning : > qemuDomainObjEnterMonitorInternal:3764 : This thread seems to be the async > job owner; entering monitor without asking for a nested job is dangerous But nothing else logged in the libvirt log on either source or destination. The actual `virsh migrate --live` command pasted above still runs while stuck in this state, and it just outputs "Migration: [100 %]" over and over. If I strace the qemu process on the source, I see this over and over: ppoll([{fd=9, events=POLLIN}, {fd=8, events=POLLIN}, {fd=4, events=POLLIN}, > {fd=6, events=POLLIN}, {fd=15, events=POLLIN}, {fd=18, events=POLLIN}, > {fd=19, events=POLLIN}, {fd=35, events=0}, {fd=35, events=POLLIN}], 9, {0, > 14960491}, NULL, 8) = 0 (Timeout) Here's those fds: [root@source ~]# ll /proc/31804/fd/{8,4,6,15,18,19,35} > lrwx------ 1 qemu qemu 64 Jun 21 13:18 /proc/31804/fd/15 -> socket:[931291] > lrwx------ 1 qemu qemu 64 Jun 21 13:18 /proc/31804/fd/18 -> socket:[931295] > lrwx------ 1 qemu qemu 64 Jun 21 13:18 /proc/31804/fd/19 -> socket:[931297] > lrwx------ 1 qemu qemu 64 Jun 21 13:18 /proc/31804/fd/35 -> socket:[931306] > lrwx------ 1 qemu qemu 64 Jun 21 13:18 /proc/31804/fd/4 -> [signalfd] > lrwx------ 1 qemu qemu 64 Jun 21 13:18 /proc/31804/fd/6 -> [eventfd] > lrwx------ 1 qemu qemu 64 Jun 21 13:18 /proc/31804/fd/8 -> [eventfd] > [root@source ~]# > > [root@source ~]# grep -E '(931291|931295|931297|931306)' /proc/net/tcp > 3: 00000000:170C 00000000:0000 0A 00000000:00000000 00:00000000 > 00000000 107 0 931295 1 ffff88043a27f840 99 0 0 10 -1 > > 4: 00000000:170D 00000000:0000 0A 00000000:00000000 00:00000000 > 00000000 107 0 931297 1 ffff88043a27f140 99 0 0 10 -1 > > [root@source ~]# Further, on the source, if I query the blockjobs status, it says no blockjob is running: [root@source ~]# virsh list > Id Name State > ---------------------------------------------------- > 11 test_vm paused > [root@source ~]# virsh blockjob 11 vda > No current block job for vda > [root@source ~]# and that nc/ssh connection is still ok in the hung state: [root@source~]# netstat -tuapn|grep \.66 > tcp 0 0 10.30.76.48:48876 10.30.76.66:22 > ESTABLISHED 10999/ssh > [root@source ~]# > root 10999 0.0 0.0 60024 4044 ? S 12:24 0:00 > \_ ssh 10.30.76.66 sh -c 'if 'nc' -q 2>&1 | grep "requires an argument" > >/dev/null 2>&1; then ARG=-q0;else ARG=;fi;'nc' $ARG -U > /var/run/libvirt/libvirt-sock' Here's the state of the migration on source while its stuck like this: [root@source ~]# virsh qemu-monitor-command 11 '{"execute":"query-migrate"}' > > {"return":{"status":"completed","setup-time":2,"downtime":2451,"total-time":3753,"ram":{"total":2114785280,"postcopy-requests":0,"dirty-sync-count":3,"page-size":4096,"remaining":0,"mbps":898.199209,"transferred":421345514,"duplicate":414940,"dirty-pages-rate":0,"skipped":0,"normal-bytes":416796672,"normal":101757}},"id":"libvirt-317"} > [root@source ~]# I'm unable the run the above command on the destination while its in this state however, and get a lock error (which could be expected perhaps, since it never cutover to the source yet): [root@destination ~]# virsh list > Id Name State > ----------------------- > 4 test_vm paused > [root@destination ~]# virsh qemu-monitor-command 4 > '{"execute":"query-migrate"}' > error: Timed out during operation: cannot acquire state change lock (held > by monitor=remoteDispatchDomainMigratePrepare3Params) > [root@destination ~]# Does anyone have any pointers of other things I should check? Or if this was/is a known bug in perhaps the old stable-3.2? I haven't seen this when migrating on a host with libvirt 4.9 on both source and destinations. However the ones I have with the older 3.2 are centos 6 based, and aren't as easily upgraded to 4.9. Or, if anyone has ideas of patches I could potentially look to port to 3.2 to mitigate this, that would also be welcome. Would also be interested in forcing the cutover in this state if possible, though I suspect that isn't safe since the block-job isnt running while in this bad state. Thanks in advance

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[libvirt-users] libvirtd does not update VM .xml configuration on filesystem after virsh blockcommit
by Saso Tavcar 20 Jun '19

20 Jun '19

Hi, Recently We've upgraded some KVM hosts from Fedora 29 to Fedora 30 and now experience broken VM configurations on filesystem after virsh blockcommit. Commands "virsh dumpxml ..." and "virsh dumpxml --inactive ..." is showing diffrent configuration than the one on filesystem. In case of restart libvirtd or system reboot, there are broken VM xml configurations on filesystem. Everything is OK on Fedora 29 KVM hosts! 0. XML configurations before snapshot is taken (all good, nothing found) [root@server1 ~]# cat /etc/libvirt/qemu/somedomain.com.ncloud.xml| grep BACK [root@server1 ~]# cat /etc/libvirt/qemu/somedomain.com.ncloud.xml| grep backingStore [root@server1 ~]# /usr/bin/virsh --quiet dumpxml somedomain.com.ncloud|grep BACK [root@server1 ~]# /usr/bin/virsh --quiet dumpxml somedomain.com.ncloud|grep backingStore [root@server1 ~]# /usr/bin/virsh --quiet dumpxml --inactive somedomain.com.ncloud|grep BACK [root@server1 ~]# /usr/bin/virsh --quiet dumpxml --inactive somedomain.com.ncloud|grep backingStore 1. When VM snapshot is taken with (all OK) /usr/bin/virsh --quiet snapshot-create-as --domain somedomain.com.ncloud .... there is a change of configuration, active, inactive and filesystem: - active (virsh dumpxml) [root@server1 ~]# /usr/bin/virsh --quiet dumpxml somedomain.com.ncloud|grep BACK <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud.qcow2-BACKUPING_NOW'/> <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud-swap.qcow2-BACKUPING_NOW'/> <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud-data1.qcow2-BACKUPING_NOW'/> <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud-data2.qcow2-BACKUPING_NOW'/> [root@server1 ~]# /usr/bin/virsh --quiet dumpxml somedomain.com.ncloud|grep backingStore <backingStore type='file'> </backingStore> <backingStore type='file'> </backingStore> <backingStore type='file'> </backingStore> <backingStore type='file'> </backingStore> - inactive (virsh dumpxml --inactive) [root@server1 ~]# /usr/bin/virsh --quiet dumpxml --inactive somedomain.com.ncloud|grep BACK <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud.qcow2-BACKUPING_NOW'/> <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud-swap.qcow2-BACKUPING_NOW'/> <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud-data1.qcow2-BACKUPING_NOW'/> <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud-data2.qcow2-BACKUPING_NOW'/> [root@server1 ~]# /usr/bin/virsh --quiet dumpxml --inactive somedomain.com.ncloud|grep backingStore <backingStore type='file'> </backingStore> <backingStore type='file'> </backingStore> <backingStore type='file'> </backingStore> <backingStore type='file'> </backingStore> - XML configuration on filesystem has changed [root@server1 ~]# ls -al /etc/libvirt/qemu/somedomain.com.ncloud.xml -rw-------. 1 root root 6260 Jun 18 23:00 /etc/libvirt/qemu/somedomain.com.ncloud.xml [root@server1 ~]# cat /etc/libvirt/qemu/somedomain.com.ncloud.xml |grep BACK <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud.qcow2-BACKUPING_NOW'/> <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud-swap.qcow2-BACKUPING_NOW'/> <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud-data1.qcow2-BACKUPING_NOW'/> <source file='/Virtualization/linux/somedomain.com/somedomain.com.ncloud-data2.qcow2-BACKUPING_NOW'/> [root@server1 ~]# cat /etc/libvirt/qemu/somedomain.com.ncloud.xml |grep backingStore <backingStore type='file'> </backingStore> <backingStore type='file'> </backingStore> <backingStore type='file'> </backingStore> <backingStore type='file'> </backingStore> 2. When VM backup is done, data merged with virsh backcommit ..." and snapshot deleted (NOT OK!!!) ... /usr/bin/virsh --quiet blockcommit somedomain.com.ncloud sdd --active --pivot /usr/bin/virsh --quiet snapshot-delete --domain somedomain.com.ncloud somedomain.com.ncloud-SNAPSHOT --metadata there is a following state of VM configurations: - active (virsh dumpxml), [root@server1 ~]# /usr/bin/virsh --quiet dumpxml somedomain.com.ncloud|grep BACK ;;; OK [root@server1 ~]# /usr/bin/virsh --quiet dumpxml somedomain.com.ncloud|grep backingStore ;;; why is there empty backingStore left ??? <backingStore/> <backingStore/> <backingStore/> <backingStore/> - inactive [root@server1 qemu]# virsh dumpxml --inactive somedomain.com.ncloud |grep BACK ;;; OK [root@server1 qemu]# virsh dumpxml --inactive somedomain.com.ncloud |grep backingStore ;;; OK - XML on filesystem (.xml file on filesystem has not changed/reverted since snapshot has been taken - NOT OK!!!!, should be cleared of snapshot source file and backingStore) [root@server1 ~]# ls -al /etc/libvirt/qemu/somedomain.com.ncloud.xml -rw-------. 1 root root 6260 Jun 18 23:00 /etc/libvirt/qemu/somedomain.com.ncloud.xml [root@server1 qemu]# cat somedomain.com.ns2.xml |grep BACK <source file='/Virtualization/linux/somedomain.com/somedomain.com.ns2.qcow2-BACKUPING_NOW'/> [root@server1 qemu]# cat somedomain.com.ns2.xml |grep backingStore <backingStore type='file' index='1'> </backingStore> ############################################################################################################################################################################## - Fedora 29 has libvirt 4.7.0 and qemu 3.0.1: [root@solaris1 ~]# rpm -qa |grep libvirt-daemon-kvm libvirt-daemon-kvm-4.7.0-3.fc29.x86_64 [root@solaris1 ~]# rpm -qa |grep qemu-system-x86 qemu-system-x86-core-3.0.1-3.fc29.x86_64 qemu-system-x86-3.0.1-3.fc29.x86_64 - Fedora 30 has libvirt 5.1.0 and qemu 3.1.0: [root@server1 ~]# rpm -qa |grep libvirt-daemon-kvm libvirt-daemon-kvm-5.1.0-8.fc30.x86_64 [root@server1 ~]# rpm -qa |grep qemu-system-x86 qemu-system-x86-3.1.0-8.fc30.x86_64 qemu-system-x86-core-3.1.0-8.fc30.x86_64 For every VM from "virsh list" we do following steps (in script) for VM backup: /usr/bin/virsh --quiet domblklist somedomain.com.ncloud /usr/bin/virsh --quiet dumpxml --inactive somedomain.com.ncloud > /Backuping/VMs/Daily/somedomain.com.ncloud.xml /usr/bin/virsh --quiet snapshot-create-as --domain somedomain.com.ncloud somedomain.com.ncloud-SNAPSHOT --diskspec sda,file=/Virtualization/linux/somedomain.com/somedomain.com.ncloud.qcow2-B… --diskspec sdb,file=/Virtualization/linux/somedomain.com/somedomain.com.ncloud-swap.qc… --diskspec sdc,file=/Virtualization/linux/somedomain.com/somedomain.com.ncloud-data1.q… --diskspec sdd,file=/Virtualization/linux/somedomain.com/somedomain.com.ncloud-data2.q… --disk-only --atomic --quiesce /usr/bin/virsh --quiet snapshot-list somedomain.com.ncloud /usr/bin/scp -p server1.somedomain.us:/Virtualization/linux/somedomain.com/somedomain.com.n… somedomain.com.ncloud.qcow2 /usr/bin/scp -p server1.somedomain.us:/Virtualization/linux/somedomain.com/somedomain.com.n… somedomain.com.ncloud-swap.qcow2 /usr/bin/scp -p server1.somedomain.us:/Virtualization/linux/somedomain.com/somedomain.com.n… somedomain.com.ncloud-data1.qcow2 /usr/bin/scp -p server1.somedomain.us:/Virtualization/linux/somedomain.com/somedomain.com.n… somedomain.com.ncloud-data2.qcow2 /usr/bin/virsh --quiet blockcommit somedomain.com.ncloud sda --active --pivot /usr/bin/virsh --quiet blockcommit somedomain.com.ncloud sdb --active --pivot /usr/bin/virsh --quiet blockcommit somedomain.com.ncloud sdc --active --pivot /usr/bin/virsh --quiet blockcommit somedomain.com.ncloud sdd --active --pivot /usr/bin/virsh --quiet snapshot-delete --domain somedomain.com.ncloud somedomain.com.ncloud-SNAPSHOT --metadata /usr/bin/ssh server1.somedomain.us "/usr/bin/rm /Virtualization/linux/somedomain.com/somedomain.com.ncloud.qcow2-BACKUPING_NOW" /usr/bin/ssh server1.somedomain.us "/usr/bin/rm /Virtualization/linux/somedomain.com/somedomain.com.ncloud-swap.qcow2-BACKUPING_NOW" /usr/bin/ssh server1.somedomain.us "/usr/bin/rm /Virtualization/linux/somedomain.com/somedomain.com.ncloud-data1.qcow2-BACKUPING_NOW" /usr/bin/ssh server1.somedomain.us "/usr/bin/rm /Virtualization/linux/somedomain.com/somedomain.com.ncloud-data2.qcow2-BACKUPING_NOW" /usr/bin/pigz --best --rsyncable somedomain.com.ncloud.qcow2 /usr/bin/pigz --best --rsyncable somedomain.com.ncloud-swap.qcow2 /usr/bin/pigz --best --rsyncable somedomain.com.ncloud-data1.qcow2 /usr/bin/pigz --best --rsyncable somedomain.com.ncloud-data2.qcow2 There is no error on script (commands) execution: [root@server1 ~]# /Backuping/bin/simple_KVM_backup.pl --depth 7 --path Daily --hosting_server server1.somedomain.us ###Backuping VM somedomain.com.ncloud: + Moving somedomain.com.ncloud.xml.06 to somedomain.com.ncloud.xml.07. + Moving somedomain.com.ncloud.qcow2.gz.06 to somedomain.com.ncloud.qcow2.gz.07. ... + Disk snapshot somedomain.com.ncloud-SNAPSHOT for somedomain.com.ncloud ... Domain snapshot somedomain.com.ncloud-SNAPSHOT created Name Creation Time State ----------------------------------------------------------------------- somedomain.com.ncloud-SNAPSHOT 2019-06-18 23:00:04 +0200 disk-snapshot Done! + Time scp start : 2019-06-18 23:00:05 somedomain.com.ncloud.qcow2 100% 20GB 401.3MB/s 00:51 Done! somedomain.com.ncloud-swap.qcow2 100% 4097MB 483.5MB/s 00:08 Done! somedomain.com.ncloud-data1.qcow2 100% 100GB 400.7MB/s 04:15 Done! somedomain.com.ncloud-data2.qcow2 100% 100GB 440.6MB/s 03:52 Done! + Time scp end : 2019-06-18 23:09:14 + Time blockcommit start : 2019-06-18 23:09:14 Successfully pivoted Successfully pivoted Successfully pivoted Successfully pivoted + Time blockcommit end : 2019-06-18 23:09:16 + Snapshot delete ... Domain snapshot somedomain.com.ncloud-SNAPSHOT deleted Done! + Delete snapshot files ... Done! + Time compress start : 2019-06-18 23:09:17 Regards, saso

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[libvirt-users] Libvirt API for getting disk capacity from VM XML
by Varsha Verma 14 Jun '19

14 Jun '19

Hello everyone, I am doing an outreachy internship at Openstack Ironic. In the sushy-tools project, we are using libvirt VMs to simulate bare metal machines for testing purposes. In the XML description of a domain, there are a bunch of disk elements giving information about the various storage devices attached to the domain. Is there some way to get the size/capacity of those disks using the libvirt API? -- *Regards,* *Varsha Verma* *Fourth Year Undergraduate* *Department of Electrical Engineering* *IIT-BHU, Varanasi*

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