- Users - libvirt List Archives

[libvirt-users] Windows 2008r2 guest tcp retransmit hangs
by Dennis Jacobfeuerborn 11 Apr '14

11 Apr '14

Hi, I'm currently investigating a problem with our windows 2008r2 guest on centos 6 hosts. The issue is that the windows system sometimes sees a SYN packet for a tcp connection but doesn't respond. Three seconds later the retransmitted packet arrives and this time windows decides to proceed normally with the connection. This is with the virtio drivers but I have now switched to the e1000 driver where the problem also occurs but not quite as badly as with virtio which leads me to speculate that the driver isn't really the problem but only affects whatever the real issue is. Also this does not happen when the systems primary IP is addressed directly but only when an IP on the loopback device is addressed through a load-balancer. I've also provisioned a linux guest on the same host and put that into the load balancer as well but there everything is fine. Has anyone run into this and can provide a pointer in the right direction? Regards, Dennis

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[libvirt-users] passthrough filesystem (9p) permissions issues on Fedora 20
by David Mansfield 10 Apr '14

10 Apr '14

Hello All: I've gotten a passthrough filesystem to work (as in, to mount) in my vm (guest F20, host F20), but due to the fact that the qemu-kvm process runs as "qemu" user, I cannot access "my" files from the share. Both the guest and the host are running SSSD so the user/group mapping is identical. Other than putting 'user = "root"' it /etc/libvirt/qemu.conf, is there a way to get this to work without trashing all of the file permissions on the directory? Even if I do put the user=root, I imagine selinux will become a major headache anyway. So is there a roadmap for how to get this working? -- Thanks, David Mansfield Cobite, INC.

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[libvirt-users] disk iotune
by Doron Fediuck 10 Apr '14

10 Apr '14

Hi, reading the below[1] on blkdeviotune made me wonder if we can dynamically change the values after the VM is already running using iotune. Is it supported? Thanks, Doron [1] https://fedoraproject.org/wiki/QA:Testcase_Virtualization_IO_Throttling

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[libvirt-users] Passing non-standard Options through Libvirt to QEMU
by Asadullah Hussain 10 Apr '14

10 Apr '14

Hello, I have a custom QEMU which requires some non-standard command line arguments to launch a VM. e.g., "--proc-type=secondary" option is always required to launch a QEMU VM. To launch the VM through libvirt (virsh) "How do I specify these non-standard options in XML? OR if thats not possible ,Can you guide me at which point (code file) libvirt converts the XML to QEMU command (so that I can insert the option there). Regards -- Asadullah Hussain

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[libvirt-users] method for communication between containers
by WANG Cheng D 09 Apr '14

09 Apr '14

Dear all, In my system, two containers need to exchange data as quick as possible and the two containers are hosted by the same physical machine, I wonder if socket is the only method for communication between containers? Thank you. Cheng Wang

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[libvirt-users] Question regarding ssh and lxc
by Schulz, Arno 09 Apr '14

09 Apr '14

I'm trying to narrow down the source of a bug where a docker container sshd closes the connection after a successful authentication (https://bugzilla.redhat.com/show_bug.cgi?id=1085081) - filed with libvirt as there's no docker-io component for RHEL 6.5 in bugzilla. One of the steps I'm taking is to reproduce a similar setup using LXC but while it seemed to have worked I'm not sure I've properly reproduced the setup I would have with docker. I've based myself on the RHEL 7b Linux Container Guide 1. Created a HelloWorld containe based on the sample config file <domain type='lxc'> <name>test-container</name> <memory>102400</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <devices> <console type='pty'/> </devices> </domain> 2. Defined, started and connected to it using virsh 3. Obtained the ip and started sshd 4. And when I logged in via sshd I got the bash from the host Any assistance would be appreciated. Arno -------------------- Confidentiality Statement - The contents of this e-mail, including its attachment, are intended for the exclusive use of the recipient and may contain confidential or privileged information. If you are not the intended recipient, you are strictly prohibited from reading, using, disclosing, copying, or distributing this e-mail or any of its contents. If you received this e-mail in error, please notify the sender by reply e-mail immediately or the Privacy Office (privacy(a)ottawahospital.on.ca ) and permanently delete this e-mail and its attachments, along with any copies thereof. Thank you. Avis de confidentialit� � Ce courriel, y compris ses pi�ces jointes, s�adresse au destinataire uniquement et pourrait contenir des renseignements confidentiels. Si vous n��tes pas le bon destinataire, il est strictement interdit de lire, d�utiliser, de divulguer, de copier ou de diffuser ce courriel ou son contenu, en partie ou en entier. Si vous avez re�u ce courriel par erreur, veuillez en informer imm�diatement l�exp�diteur ou le bureau de la Protection des renseignements personnels (info.privee(a)hopitalottawa.on.ca) puis effacez le courriel ainsi que les pi�ces jointes et toute autre copie. Merci. --------------------

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[libvirt-users] Not able to start a VM - Xen and libvirt
by Aravindhan Dhanasekaran 08 Apr '14

08 Apr '14

Hello, I've installed Xen 4.3.1 on a machine with x86 based 64-bit Intel processor running Fedora 20 (Linux 3.11) and libvirt 1.0.1. I'm not able to start a VM. It's failing with the below mentioned error. What am I doing wrong? If this is documented somewhere, a pointer to that would be great. I did a "generic" search, but in vain, before posting to this list and I couldn't find an easier way to search through the mailman archives of this mailing list. Thanks for your time. Aravind Error starting domain: internal error: libxenlight failed to create new domain 'vm1' Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 91, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 127, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/domain.py", line 1355, in startup self._backend.create() File "/usr/lib64/python2.7/site-packages/libvirt.py", line 708, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: internal error: libxenlight failed to create new domain 'vm1'

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[libvirt-users] Issue with 1.2.3 and lxcCheckNetNsSupport
by Thierry Parmentelat 08 Apr '14

08 Apr '14

Hi there I’ve just moved to libvirt-1.2.3 from 1.2.1; we use it for dealing with lxc containers I just wanted to report that everything went well for us with this new release, except for one little glitch At some point the lxc drivers seems to check that the kernel indeed has the netns feature built in Well in our environment this checks miserably fails; I haven’t been able to tell exactly why, but could find this post that might be related Bug 1050210 – lxcCheckNetNsSupport fails to detect NETNS As a quick workaround I have this patch below in place, with which everything else seems to be working fine; at least all our system tests are passing.. It feels like the way the 1.2.3 code checks for the presence of netns is clearly not exactly right (in our case selinux is disabled), and I wish a more reliable solution can be found in the future :) Hope this helps — Thanks in any case

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[libvirt-users] need help on libvirt and virt manager
by Muhammad Yousuf Khan 04 Apr '14

04 Apr '14

Hello every one. i have been running Libvirt for few weeks on testing and will be migrating from Proxmox to libvirt very soon however there is a problem with command line learning. Virsh and virt-install is a complete set of commands. but i want to learn in depth some more command line option. so my question is; can i learn what "Virt-manager" GuI is running on the back end. so that i can learn how it add,edit,delete some advance level of configuration via GUI. i mean like we have "history" command which show what have we run in past so can i also have the details what Virt-manager has run remotely Thanks, MYK

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[libvirt-users] set keep alive
by Fl＠sh 03 Apr '14

03 Apr '14

Can anyone explain what is happening. After call virConnectOpen virEventRegisterDefaultImpl() call virConnectSetKeepAlive returns VirtError(1): internal error: the caller doesn't support keepalive protocol; perhaps it's missing event loop implementation, but the next call this sequence of commands returns success. Why virConnectSetKeepAlive not work right the first time? -- Fl@sh

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