October 2015 - Users - libvirt List Archives

[libvirt-users] "failed to connect to the hypervisor"
by Ken D'Ambrosio 21 Oct '15

21 Oct '15

Hi, all. Ubuntu host, attempting to get virsh working with VirtualBox... and failing. Here's what happens: root@foobox:~# virsh -c vbox:///session list error: failed to connect to the hypervisor error: internal error: unable to initialize VirtualBox driver API ------------------------------------------------------ Now, most of the docs I read about "failed to connect to the hypervisor" have other errors that happen *before* the "failed to connect" one, that are the root cause (e.g., unable to open socket, or bad cert, or whatever). But that's not the case, here. And what puzzles me more is that -- while I don't know what the output *should* look like -- to my eye, strace seems to say that we're getting information back: 1940 read(5, "Node 1 MemTotal: 33011680 kB\nNode 1 MemFree: 32565612 kB\nNode 1 MemUsed: 446068 kB\nNode 1 Active: 57948 kB\nNode 1 Inactive: 77036 kB\nNode 1 Active(anon): 27688 kB\nNode 1 Inactive(anon): 84 kB\nNode 1 Active(file): 30260 kB\nNode 1 Inactive(file): 76952 kB\nNode 1 Unevictable: 52 kB\nNode 1 [...] ------------------------------------------------------ In my googling, I see mention of per-VM XML files that... do something. But what they do, and how they're generated, doesn't seem clear. (E.g., XML mentioned here: http://libvirt.org/drvvbox.html -- it just sort of sits there, with no context.) Is that something I need? Thanks for any enlightenment you might be able to offer me, -Ken

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[libvirt-users] enable aes for guest
by Parvathi 20 Oct '15

20 Oct '15

Hi, How do I enable aes for guest VM? Host CPU supports aes (cat /proc/cpuinfo has aes in its flags and virsh capabilities also displays aes as a feature). When I add <features> <aes/> </features> to the xml file, I am unable to create the VM. It complains with the below error: virsh create /tmp/tmp.xml error: Failed to create domain from /tmp/tmp.xml error: internal error: unexpected feature aes Best!

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[libvirt-users] selective virsh host permissions
by Jamie Fargen 20 Oct '15

20 Oct '15

As a Systems Administrator, I would like to grant permissions to a certain VM using unix groups. In this example there is a hypervisor with VMs A,B,C,D and there is a group called fortadmins. The solution I am searching forI would just allow fortadmins to use libvirt/virsh commands on VM D. Does libvirt/virsh provide any way to easily accomplish this goal? Regards, Jamie Ian Fargen

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[libvirt-users] virsh blockcopy without undefine
by Nathan Shearer 14 Oct '15

14 Oct '15

I have a script that performs a backup with the following steps: virsh dumpxml --inactive "$DOMAIN" > "$TMP/${DOMAIN}.xml" && \ virsh dumpxml --inactive "$DOMAIN" > "$DESTINATION_XML" && \ virsh undefine "$DOMAIN" && \ virsh blockcopy "$DOMAIN" "$SOURCE_DISK" "$DESTINATION_DISK" --wait --verbose --finish && \ virsh define "$TMP/${DOMAIN}.xml" It's basic and did work for creating basic backups. Is there a way to do this without undefining the domain? I recently had to redefine the VM from a backup XML because this script failed during the block copy step. Why can't I blockcopy a domain that is defined? Why does it need to be undefined first?

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[libvirt-users] virsh can't support VM offline blockcommit
by 陈明 13 Oct '15

13 Oct '15

Hi everyone! I use the libvirt(version: 1.2.2) and QEMU(version: 2.2.1) to test qemu snapshot features: I tried virsh blockcommit when VM offline, the virsh blockcommit failed: the error messase as below: * error: Requested operation is not valid: domain is not running* when I start the VM, the virsh blockcommit work fine! my question is : we need virsh support blockcommit when VM offline。how do？ we test qemu snapshot as follows： we need create snapshot of the cycle，and by virsh blockcommit merge snapshot chain，but whenVM offline， the virsh blockcommit will fail， someone suggest me：when VM offline，may use qemu-img commit to submit snapshot turn，but qemu-img can't modify snapshot chain backing relation，it need we use qemu-img rebase amend snapshot‘s backingfile，* the main question* is when we use qemu-img rebase modify snapshot's backingfile, if someone start the VM, it will may lead to VM filesystem readonly。 we should how to solve the question? thanks!

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[libvirt-users] Creating external snapshots.
by Dominique Ramaekers 12 Oct '15

12 Oct '15

Hi, I'm trying to create an external snapshot for backup purposes. Only I get an error after the command: virsh snapshot-create-as --domain PCVIRT1 PCVIRT1-SN1 --diskspec vda,file=/var/lib/libvirt/images/VIRT1-SN1.qcow2 --disk-only --atomic --quiesce fout: internal error: kan AppArmor profiel 'libvirt-2c9c04d7-f86d-df12-da9f-9847ac8b994f' niet vernieuwen (Sorry about the dutch... it means: error: internal error: can not renew AppArmor profile 'libvirt-....') I can't find anything about this error... Anybody got an idea how to resolve this problem? Greetings, Dominique.

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[libvirt-users] virsh can't support VM offline blockcommit
by 陈明 12 Oct '15

12 Oct '15

Hi everyone! I use the libvirt(version: 1.2.2) and QEMU(version: 2.2.1) to test qemu snapshot features: I tried virsh blockcommit when VM offline, the virsh blockcommit failed: the error messase as below: * error: Requested operation is not valid: domain is not running* when I start the VM, the virsh blockcommit work fine! my question is : we need virsh support blockcommit when VM offline。how do？ we test qemu snapshot as follows： we need create snapshot of the cycle，and by virsh blockcommit merge snapshot chain，but whenVM offline， the virsh blockcommit will fail， someone suggest me：when VM offline，may use qemu-img commit to submit snapshot turn，but qemu-img can't modify snapshot chain backing relation，it need we use qemu-img rebase amend snapshot‘s backingfile，* the main question* is when we use qemu-img rebase modify snapshot's backingfile, if someone start the VM, it will may lead to VM filesystem readonly。 we should how to solve the question? thanks!

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[libvirt-users] OPW 2015 application
by Ishani 11 Oct '15

11 Oct '15

Sir, I am Ishani Chugh, a third year undergraduate student of Electronics and Communications Engineering at International Institute of Information Technology, Hyderabad. I am passionate about Open Source Development. I also have some experience working with git, I aspire to contribute to QEMU as Open source Developer under OPW and I am interested in working on the project 'Enhancing libvirt-designer', since I feel, I have the enthusiasm and skills required. I will appreciate any assistance with regards to beginner contribution on this project. Sincerely, Ishani

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[libvirt-users] virsh can't support VM offline blockcommit
by justlibvirt 10 Oct '15

10 Oct '15

Hi everyone! I use the libvirt(version: 1.2.2) and QEMU(version: 2.2.1) to test qemu snapshot features: I tried virsh blockcommit when VM offline, the virsh blockcommit failed: the error messase as below: error: Requested operation is not valid: domain is not running when I start the VM, the virsh blockcommit work fine! my question is : we need virsh support blockcommit when VM offline。how do？ we test qemu snapshot as follows： we need create snapshot of the cycle，and by virsh blockcommit merge snapshot chain，but whenVM offline， the virsh blockcommit will fail， someone suggest me：when VM offline，may use qemu-img commit to submit snapshot turn，but qemu-img can't modify snapshot chain backing relation，it need we use qemu-img rebase amend snapshot‘s backingfile， the main question is when we use qemu-img rebase modify snapshot's backingfile, if someone start the VM, it will may lead to VM filesystem readonly。 we shoule solve the question? thanks!

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[libvirt-users] qemu:///session and network-mounted home directories
by Spencer Baugh 10 Oct '15

10 Oct '15

Dear libvirt-users, Suppose my home directory is network mounted on to several different machines. And suppose I defined some VMs in qemu:///session. The configuration files and disk images for qemu:///session are stored in my home directory. Now suppose I log in to some machine and use virsh. The qemu:///session VMs that are marked autostart are started. Now if I log into another machine and use virsh, it will presumably try to start my autostart VMs again, since the same configuration is present in both homedirs. Is there anything libvirt does that might prevent it from starting the same VM multiple times on different machines? Or might allow machine-specific autostart configuration? Maybe something could be done with /etc/machine-id! In terms of qemu:///system, this is like having /var/lib/libvirt/images/ live on a network-mounted filesystem (fairly normal I assume) and also having /etc/libvirt/qemu live on a network-mounted filesystem (not as normal). Not sure how you would deal with the issue there either but I can see why you might want to have your same VM configuration available on all hosts, so it would be cool to figure out that problem as well. The answer may be the VM configuration is host-specific, so sharing VM configuration between hosts is not a good idea. In that case, any other recommendations on how to deal with the networked homedir case? Thanks!

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