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[libvirt-users] libvirt with glusterfs problem
by lyz_pro 17 Apr '14

17 Apr '14

Hi I have two node: hcg3, hcg4 which run glusterfs Also run libvirtd on each node. The problem cames when I use `virsh attach-device` to attach a glusterfs type disk . My device xml like: <disk type="network" device="disk"> <driver name="qemu" type="raw" cache="none"/> <source protocol="gluster" name="h2312v3/volume-257e07bd-9e80-4d06-8d6d-5f83979de1fd"> <host name="hcg4"/> </source> <target bus="virtio" dev="vdb"/> <serial>257e07bd-9e80-4d06-8d6d-5f83979de1fd</serial> </disk> when I attach a gluster disk to a domain running on hcg4. the above xml work great. BUT when I try to change the tag `host` name attribute to hcg3, the attach action will fail with output: error: Requested operation is not valid: domain is not running Also: I can use `qemu-kvm` command to start vm successful with gluster://hcg3 or gluster://hcg4. I have stop both nodes' iptables. and my libvirt and qemu version is : Compiled against library: libvirt 1.1.4 Using library: libvirt 1.1.4 Using API: QEMU 1.1.4 Running hypervisor: QEMU 1.6.2 glusterfs-3.4.1-3.el6.x86_64 -------------- lyz_pro 2014-04-11

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[libvirt-users] Snapshots
by lukass.vacek＠seznam.cz 17 Apr '14

17 Apr '14

Hello, I would like to ask what I am doing wrong and what is the best approach to resolve this situation: First of all I start virtual machine by virDomainCreateXML. In my application I use libvncclient library that sends mouse events to this running domain. I had some troubles with coordinates of mouse cursor but all problem was solved when I added <input type='tablet' bus='usb'/> to xml configuration. So now I have a running domain and I want to create snapshot and then after some operations I want to restore this snapshot. I use virDomainSave and virDomainRestore that work fine. The only problem is, that after creating and restoring snapshot I have the same problem with coordinates of mouse. I need to create and restore snapshot also with <input type='tablet' bus= 'usb'/> somewhere specified. I also tried methods virDomainSaveFlags with xml configuration string(see below) as parameter *dxml, but method fails with: libvir: Domain Config error : XML error: domainsnapshot.Unable to create snapshot. What should I add to xml configuration? I look at http://libvirt.org/ formatsnapshot.html on example but I dont know what paths I should use in my program. I dont understand much snapshots and similar stuff so could you give me example how could I edit my xml configuration? Or what I should do to make virDomainSave and virDomainRestore work? xml configuration: <domain type='kvm'> <name>Name</name> <uuid>c7a5fdbd-cdaf-9455-926a-d65c16db1810</uuid> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <vcpu>2</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> </os> <devices> <input type='tablet' bus='usb'/> <emulator>/usr/bin/qemu-system-x86_64</emulator> <disk type='file' device='disk'> <source file='/home/lukas/Desktop/Image.img'/> <target dev='hda'/> </disk> <interface type='network'> <source network='default'/> </interface> <graphics type='vnc' port='5901'> <listen type='address' address='127.0.0.1'/> </graphics> </devices> </domain>

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Re: [libvirt-users] [virt-tools-list] live-migrating a VM whose current host's storage is fubar'ed
by Cole Robinson 17 Apr '14

17 Apr '14

On 04/15/2014 05:16 PM, Digimer wrote: > Hi all, > > For those on the linux-cluster list, this is a similar question to my > post[1] there. > > I recently had a client destroy their node's RAID array (they yanked hard > drives until the array was destroyed). The VMs running on the node continued > to operate for another hour, impressively. Their storage was based on DRBD, so > the VM's storage just started going to/from the other node's storage. > > The problem was when I tried to migrate them off of the damaged node to a > healthy node. Without being able to write to the logs (I assume), the > migration failed. In the end, I had to force-off the damaged host and reboot > the VMs on the backup node. This caused an outage which, I think, could have > been avoided. > > So my question is; Can VMs be migrated if/when the host's FS is > read-only/destroyed? If so, how? > > Thanks! > > 1. https://www.redhat.com/archives/linux-cluster/2014-April/msg00010.html > Probably a better question for libvirt lists, CCd, but I don't think anyone tests a scenario like that so there's bound to be problems. - Cole

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[libvirt-users] LXC vCPU controlling problem
by Xingjun Wang 16 Apr '14

16 Apr '14

Hi,guys! I've been using libvirt-1.1.1 with LXC1.0.0 to do my CS homework.But I met a problem when I tried to set vcpu for a LXC.The /sys/fs/cgroup/cpuset/machine/cpuset.cpus always show 0-3 no matter how many vcpu I defined in the XML setting file. But I found the command "virsh -c lxc:/// domaininfo lxc_name" got the right number as it is defined. What's the problem there? Is it a bug in libvirt-1.1.1? Thank you!

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Re: [libvirt-users] LXC + USB passthrough = Operation not permitted
by WANG Cheng D 15 Apr '14

15 Apr '14

Dear Fil, I am not sure if my answer can help you. I had ever asked a similar question to Daniel and I was using a thirty-party card. As a container uses a shared kernel with the host, so hostdev mode='subsystem' doesn't make sense. Maybe you can try to use hostdev mode='capabilities'. Please see http://libvirt.org/formatdomain.html#elementsHostDevCaps Hope this helps Cheng Wang

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[libvirt-users] Changing dnsmasq DNS settings for virtual machines
by Johannes Kastl 15 Apr '14

15 Apr '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi everyone, maybe this is an old fart, but I cant get it to work. I am running libvirt on a laptop, where a dnsmasq is already running to delegate dns info for my local (not-public) network. My resolv.conf (on the host) lists the system-dnsmasq as first server. I had to set the listen-adress for the system-dnsmasq to 127.0.0.1 and set bind-interfaces, to stop if from binding to all interfaces and overriding the libvirtd-dnsmasq, which also has dhcp enabled. Now, how can I tell the libvirtd-dnsmasq, to use the system-dnsmasq as first nameserver? I found lots of pages when searching for "libvirt dns", but all of them only show the dhcp-part of the network's xml file: http://wiki.libvirt.org/page/VirtualNetworking#DNS_.26_DHCP > <ip address="192.168.122.1" netmask="255.255.255.0"> <dhcp> <range > start="192.168.122.100" end="192.168.122.254" /> <host > mac="00:16:3e:e2:ed" name="foo.example.com" ip="192.168.122.10" /> > </dhcp> </ip> One possible workaround: My system-dnsmasq reads /etc/hosts_whatever, and apparently the libvirtd-dnsmasq reads var/lib/libvirt/dnsmasq/NETWORK_NAME.addnhosts. I could copy my hosts_whatever in that place, but I had to configure the libvirtd-dnsmasq what my local domains are. Which brings me to the next question: How to set the addn-hosts= for the libvirtd-dnsmasq in the xml file? Regards, Johannes - -- A good sermon should be like a woman's skirt: short enough to arouse interest but long enough to cover the essentials. (Ronald Knox) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) Comment: Using GnuPG with SeaMonkey - http://www.enigmail.net/ iEYEARECAAYFAlNA5zMACgkQzi3gQ/xETbJBVACeLV9j/TDxgnImAsyEtotUBJ2J OD0An2WDBWUoqCUvmoquk4pwoKplfu/T =g6YM -----END PGP SIGNATURE-----

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[libvirt-users] Is it possible to get the vm which is using a storage pool's volume?
by Pasquale Dir 15 Apr '14

15 Apr '14

Hello, how can I programmatically get the vm which is currently using a storage volume? I looked at the apis but I can't find anything about it. Pasquale

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[libvirt-users] libvirt and glusterfs integrate problem
by lyz_pro 15 Apr '14

15 Apr '14

Hi everyone I have a problem when use libvirt and glusterfs. When I use libvirt to start a vm with glusterfs disk. the operation will block. after I `CTL + c` the 'virsh start domainxx' comand , I use `virsh list` will find the vm in a strange state, kind like follow: Id Name State ---------------------------------------------------- 20 vm10 shut off and I when I start the vm again, It will promote the vm is in active. the xml as follow (172.16.32.16 is a glusterfs node): <domain type='kvm' id='20'> <name>vm10</name> <uuid>12208c14-3990-c134-2653-8a828ff1eb1d</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>4</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64' machine='rhel6.5.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='network' device='disk'> <driver name='qemu' type='qcow2'/> <source protocol='gluster' name='h2216v5/tmp/vm10.img'> <host name='172.16.32.16'/> </source> <target dev='hda' bus='ide'/> <alias name='ide0-0-0'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='usb' index='0'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='pci' index='0' model='pci-root'> <alias name='pci.0'/> </controller> <interface type='bridge'> <mac address='00:0c:29:2f:aa:b1'/> <source bridge='virbr0'/> <target dev='vnet91'/> <model type='rtl8139'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5991' autoport='yes' listen='172.16.32.3' keymap='en-us'> <listen type='address' address='172.16.32.3'/> </graphics> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> <seclabel type='none'/> </domain> Also: I can use `qemu-kvm` command to start vm successful with gluster://172.16.32.16 I have stop both nodes' iptables. and my libvirt and qemu version is : Compiled against library: libvirt 1.1.4 Using library: libvirt 1.1.4 Using API: QEMU 1.1.4 Running hypervisor: QEMU 1.6.2 glusterfs-3.4.1-3.el6.x86_64 -------------- lyz_pro 2014-04-14

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[libvirt-users] libvirt Java - vmware (esx driver)
by Mihai Cazacu 14 Apr '14

14 Apr '14

Hi, I'm trying to connect to a VMware vCenter Server (Version 5.0.0 Build 1300600) using this code: class CustomConnectAuth extends ConnectAuth { > CustomConnectAuth() { > // credType = ... // ... > } > @Override > int callback(Credential[] cred) { > // ... > return 0 > } > } > ConnectAuth auth = new CustomConnectAuth() > Connect conn = new Connect("esx://USERNAME@HOSTNAME/sdk?no_verify=1", > auth, 0) and I've got this error message: libvirt: error : unsupported configuration: *libvirt was built without the > 'esx' driver* If I use the vijava client, the connection works fine. ServiceInstance serviceInstance = new ServiceInstance(new URL(" > https://HOSTNAME/sdk"), USERNAME, PASSWORD, true) ... Some environment info: os: Ubuntu 13.10 > jdk: 1.7.0_51-b13 > Java client: org.libvirt:libvirt:0.5.1 Can you help, please? Thanks, Mihai -- Mihai Cazacu Software Engineer E-mail: cazacugmihai(a)gmail.com Mobile: +40 745 254 657 Linkedin: cazacugmihai <http://www.linkedin.com/in/cazacugmihai> Skype: cazacugmihai Twitter: cazacugmihai

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[libvirt-users] Setting elevator=noop in the guest necessary?
by Johannes Kastl 14 Apr '14

14 Apr '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi everyone, I found an article about libvirt, and one thing that I have not seen anywhere else: > IMPORTANT: If you boot a Linux VM, you might want to add > “elevator=noop” to your Linux boot command line to force the disk > scheduler to let the host machine handle the disk writes > reorganisations (like tunnelling tcp over tcp, it is bad to have > two schedulers trying to do each other’s job). For example, on > GRUB2 on Debian, you have to append “elevator=noop” after > GRUB_CMDLINE_LINUX in /etc/default/grub. (from http://blog.normation.com/en/2012/03/09/a-guide-to-the-everyday-use-of-libv…) Is this necessary? Or is this even a good idea? Is this outdated? Or does it depend on the kind of hypervisor (XEN, KVM,...)? The few qemu/KVM-machines I have tested did work fine without this, although at this point I just set them up and did a few program installations, no real 'workload'. Thanks in advance. Regards, Johannes - -- ...Unix, MS-DOS, and Windows NT (also known as the Good, the Bad, and the Ugly). (Matt Welsh) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with SeaMonkey - http://www.enigmail.net/ iEYEARECAAYFAlNK5UUACgkQzi3gQ/xETbK9jQCePXXY87HpDrufk8tKvaI+JhR9 uGQAoJjxU/B8Z8sGvQS/iPUZNsQtM/Il =sjGR -----END PGP SIGNATURE-----

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