- Users - libvirt List Archives

[libvirt-users] SCSI tape drive device
by Tom Stave 01 Nov '10

01 Nov '10

I have a SCSI tape backup unit attached to a kvm host managed by libvirt. Is there a way to expose the SCSI device in libvirt so I could pass the device to a virtual machine and have the virtual machine control the tape backup? Defining the device as a SCSI disk does not appear to work. In this situation, live migration is not an issue. The VM would always be tied to this host.

3 2

[libvirt-users] libvirt problems. Create bridged network via cmdline?
by Денис Барышев 01 Nov '10

01 Nov '10

Hello! I've faced a weird problem. And I totally can't understand how libvirt handles networks. The thing that i need to do is simple. I create a bridge in my ubuntu host, the following config: *iface eth0 inet manual* * * *auto br0* *iface br0 inet dhcp* * bridge_ports eth0* * bridge_stp on* * bridge_maxwait 0* That's OK, and my bridge turns up automatically. But I don't understand why libvirt can't use it, it always want to create bridge on its own. So that when I try to create bridged network with the command: virsh virsh net-create net.xml net.xml contents: * <network>* * <name>virbreth0</name>* * <bridge name='br0' stp='on' delay='0' />* * </network>* I always get error ===> error: Failed to create network from net.xml error: cannot create bridge 'br0': File exists That's pretty obvious that libvirt wants to create bridge on its own. But what should I do in my specific situation. May be there is a workaround. I appreciate any help and ideas... Thanks for your answers. Best regards, Denis Barishev.

2 1

[libvirt-users] qemu sdl parameters via libvirt
by Bruce Hohl 01 Nov '10

01 Nov '10

Hello List, I run a few VMs via libvirt using '--sdl'. I would like to use qemu parameters -no-quit, -no-frame and -ctrl-grab with libvirt. Does libvirt support a way to use these qemu parameters? Does libvirt provide a way to add these options under <graphics/> in the domain.xml using 'virsh edit domain.xml'? My current <graphics/> is as follows: <graphics type='sdl' display=':0' xauth='/home/admin1/.Xauthority'/> I know I could just create a regular kvm start-up script and include these parameters but I would like to manages all VMs via libvirt & virt-manager.

2 1

[libvirt-users] Compiling libvirt-0.8.4 for NFSv4
by paul.worner＠thomsonreuters.com 28 Oct '10

28 Oct '10

Hi all, Not sure if this will be useful to anyone. Worse, it's probably not complete or correct, but I thought I would throw this out there for comment. I asked earlier about configuring libvirt for NFSv4 support. I wanted to define NFSv4 pool from xml config, but it's not an option. I decided to hack a bit. Added the following to source code: storage_conf.h(417): enum virStoragePoolFormatFileSystemNet { VIR_STORAGE_POOL_NETFS_AUTO = 0, VIR_STORAGE_POOL_NETFS_NFS, VIR_STORAGE_POOL_NETFS_NFS4, VIR_STORAGE_POOL_NETFS_GLUSTERFS, VIR_STORAGE_POOL_NETFS_CIFS, VIR_STORAGE_POOL_NETFS_LAST, }; storage_conf.c(64): VIR_ENUM_IMPL(virStoragePoolFormatFileSystemNet, VIR_STORAGE_POOL_NETFS_LAST, "auto", "nfs", "nfs4", "glusterfs", "cifs") Compiled libvirt and then created storage pool xml: <pool type="netfs"> <name>pool2</name> <source> <host name="test_filer"/> <dir path="/libvirt"/> <format type="nfs4"/> </source> <target> <path>"/usr/local/var/lib/libvirt/images/nfsds2"</path> </target> </pool> 'Virsh pool-create [above xml]' works, using 'mount -t nfs4'. Again, this seemed too easy, so I won't be surprised if things break. However, I was just trying to demonstrate functionality in lab, so failures are fine short term. Please comment on flaws or improvements to this approach. Thanks, Paul Worner

2 1

[libvirt-users] List volumes of a domain
by Andrea Turli 26 Oct '10

26 Oct '10

Hi all, I'm using libvirt java binding (libvirt-java-0.4.6) I'd like to know if the Domain class offers an API to query volumes attached to a particular domain or should I parse the XML domain description? Thanks for your support -- Andrea Turli Ricercatore Direzione Ricerca e Innovazione andrea.turli(a)eng.it Engineering Ingegneria Informatica spa Via Riccardo Morandi, 32 00148 Roma (RM) Tel. +39 06 8307 4710 Fax +39 06 8307 4200 www.eng.it

2 1

[libvirt-users] Fwd: undefining and redefining a Domain from libvirt java bindings
by Ravi Pawar 22 Oct '10

22 Oct '10

hi, i am trying to undefine a domain by using dm.undefine(); and then trying to create one with same name is giving me error saying 'Domain not found: no domain with matching uuid 'aeae9d4e-17cb-b661-a612-88ac677c28c1' i have attached my test program which reproduces the issue. please let me know where i am going wrong? configuration: libvirt : 0.6.3 Java Bindings: 0.4.2 -- Thanks & Regards Ravi Pawar

3 7

[libvirt-users] Virt-v2v
by Mike Hall 21 Oct '10

21 Oct '10

Usual prologue: we're testing on CentOS 5.5, RHEL subscriptions purchased. Now trying to use virt-v2v to transfer Win2008 Server guest from ESXi host to KVM host. Have enabled SSH on ESXi host, and can connect using esx+ssh://esxhost, but procedure fails because nc isn't found on ESXi. Fair enough. BTW, ESXi looks like a radically cut down RH system (/etc/sysconfig being the give-away)? So, using esx:// connection method which presumably uses TLS ... Connection commands I'm trying to use: virt-v2v -f virt-v2v.conf -ic esx://esxhost/?no_verify=1 -op vm_nfs 'HPTRIM Sandbox' virt-v2v -f virt-v2v.conf -ic esx://esxhost/ -op vm_nfs 'HPTRIM Sandbox' I have eliminated libvirt error messages (all #38) relating to /etc/pki/CA/cacert.pem and /etc/pki/libvirt/private/clientkey.pem by creating those files on KVM host according to info on this page: http://libvirt.org/remote.html#Remote_libvirtd_configuration Now I am down to a simple connection refused error message: virt-v2v: Failed to connect to esx://esxhost/: libvirt error code: 38, message: unable to connect to 'esxhost': Connection refused I have also tried suggestion on webpage above regarding these libvirtd.conf settings and restarted libvirtd: tls_no_verify_certificate = 1 key_file = "" cert_file = "" ca_file = "" crl_file = "" ... But no change. The problem may well be the TLS certificates, PKI isn't one of my strong points. I believe the hostnames in the certificates are correct. Which certificates (if any) should be copied to the ESXi host (client or server)? Should I copy any certificates from /etc/vmware/ssl to the KVM host, if so which certificate (rui.crt or rui.key) and where to? There doesn't appear to be anything resembling an iptables firewall in place on the ESXi host. Anyway, any suggestions on what the problem could be greatly appreciated. Michael Hall IT Communications Officer Alice Springs Town Council

3 2

Re: [libvirt-users] Virt-v2v
by Osier 21 Oct '10

21 Oct '10

I guess ESX driver is not compiled for your libvirt version. To if it's complied, e.g. # strings /usr/lib64/libvirt.so.0.8.1 | grep esx -i If you can't see the symbols like "esxDomainCreate, esxDomainDestroy", it's not.(In case of CentOS doesn't strip the symbols of libvirt.) and in that case you need to recompile libvirt from source code and install it. # ./autogen.sh --prefix=/usr --with-esx # ./configure # make # make install Hope it works - Osier ----- "Mike Hall" <MHall(a)astc.nt.gov.au> wrote: > Usual prologue: we're testing on CentOS 5.5, RHEL subscriptions > purchased. > > Now trying to use virt-v2v to transfer Win2008 Server guest from ESXi > host to KVM host. > > Have enabled SSH on ESXi host, and can connect using > esx+ssh://esxhost, but procedure fails because nc isn't found on ESXi. > Fair enough. BTW, ESXi looks like a radically cut down RH system > (/etc/sysconfig being the give-away)? > > So, using esx:// connection method which presumably uses TLS ... > > > Connection commands I'm trying to use: > > virt-v2v -f virt-v2v.conf -ic esx://esxhost/?no_verify=1 -op vm_nfs > 'HPTRIM Sandbox' > virt-v2v -f virt-v2v.conf -ic esx://esxhost/ -op vm_nfs 'HPTRIM > Sandbox' > > I have eliminated libvirt error messages (all #38) relating to > /etc/pki/CA/cacert.pem and /etc/pki/libvirt/private/clientkey.pem by > creating those files on KVM host according to info on this page: > > http://libvirt.org/remote.html#Remote_libvirtd_configuration > > Now I am down to a simple connection refused error message: > > virt-v2v: Failed to connect to esx://esxhost/: libvirt error code: 38, > message: unable to connect to 'esxhost': Connection refused > > I have also tried suggestion on webpage above regarding these > libvirtd.conf settings and restarted libvirtd: > > tls_no_verify_certificate = 1 > key_file = "" > cert_file = "" > ca_file = "" > crl_file = "" > > ... But no change. > > The problem may well be the TLS certificates, PKI isn't one of my > strong points. I believe the hostnames in the certificates are > correct. Which certificates (if any) should be copied to the ESXi host > (client or server)? > Should I copy any certificates from /etc/vmware/ssl to the KVM host, > if so which certificate (rui.crt or rui.key) and where to? > > There doesn't appear to be anything resembling an iptables firewall in > place on the ESXi host. > > Anyway, any suggestions on what the problem could be greatly > appreciated. > > Michael Hall > IT Communications Officer > Alice Springs Town Council > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users

1 0

Re: [libvirt-users] Monitoring and statistics through libvirt
by peter.phaal＠gmail.com 20 Oct '10

20 Oct '10

On Fri, Oct 01, 2010 at 03:47:23PM +0200, Tomi wrote: > Hi folks, > is it possible to monitor and gather statistics in realtime (CPU, > memory, HDD, network, ... - something like dstat) of guest systems > with libvirt through console from host system (KVM based)? If yes, do > those guests need to be created through libvirt? Thanks for your help > and time. If you have a large number of servers to monitor, you might want to look at the Host sFlow agent: http://host-sflow.sourceforge.net/ The Host sFlow agent is installed on the server and locally polls physical server statistics and VM statistics using libvirt. The statistics are exported using the sFlow protocol. http://www.sflow.org/ If you want detailed network visibility then the Open vSwitch includes sFlow monitoring of inter-VM traffic: http://openvswitch.org/ For more information, see: http://blog.sflow.com/2010/10/kvm.html http://blog.sflow.com/2010/10/sflowtrend-adds-server-performance.html Peter

3 2

[libvirt-users] libvirt fails to autostart on boot
by Serg Khaladzinski 20 Oct '10

20 Oct '10

Hi I'm having a problem with libvirt. OS: Ubuntu 10.04 When I installed everything initially it worked properly, I was able to use virtual manager to connect to QEMU and install (and run guest OS). But after I rebooted my box - libvirt is not started even though I can see init script in /etc/init.d/libvirt-bin When I start libvirtd manually it works.. But it's kind of annoying for me to do it manually every time.. Maybe someone may suggest any ideas of how can I debug and fix this issue with libvirt autostart. Thanks a lot.

2 1