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[libvirt-users] Virt-v2v
by Mike Hall 22 Oct '10

22 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

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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

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Re: [libvirt-users] Monitoring and statistics through libvirt
by peter.phaal＠gmail.com 21 Oct '10

21 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

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[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.

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Re: [libvirt-users] Monitoring and statistics through libvirt
by Peter Phaal 16 Oct '10

16 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

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[libvirt-users] NFS4 + SELinux
by Mike Hall 15 Oct '10

15 Oct '10

All test machines are CentOS 5.5 (RHEL subscriptions purchased). We've had NFS3 storage working fine and decided to try NFS4. We can mount an NFS4 share on our KVM host, but the SELinux file context on the mountpoint directory is magically changed from virt_image_t to nfs_t. Restorecon refuses to change it back. Adding the mount option context=system_u:object_r:virt_image_t on either server or client doesn't help (option not recognised). What could we be doing wrong? Does NFS4 + KVM work? Are there any 'best practices' references around for using NFS4 for KVM storage? Much of the documentation doesn't appear 100% relevant as we're dealing with a dedicated SAN network with one user (root) and 'always on' sharing, so much of the more complicated authentication and autofs stuff just gets in the way. Thanks Michael Hall IT Communications Officer Alice Springs Town Council mhall(a)astc.nt.gov.au (08) 8950 0561

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[libvirt-users] NFSv4 Storage Pools
by paul.worner＠thomsonreuters.com 15 Oct '10

15 Oct '10

Hi, Is it possible to configure libvirt to use NFSv4 for a pool? I am doing some iptables SNATing and rpc.statd can't handle it. Thanks, Paul

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[libvirt-users] How to rename a domain?
by Ganesh Pagade 15 Oct '10

15 Oct '10

Hi, I am using libvirt Java bindings. How can I rename a domain? Is there an API to do this? Thanks, -Ganesh

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Re: [libvirt-users] Question about use libvirt
by Mike Hall 13 Oct '10

13 Oct '10

Original message: For a new system to develop, I need to know if I can use libvirt for to get (listen) the information that pass trought the lan (vlan) of the each VM. Marcela's perfect Spanish: quiero saber si utilizando esta libreria, puedo utilizar alguna función que me permita capturar los mensajes que se envian aplicaciones paralelas de paso de mensajes que se ejecutan en las máquinas virtuales. Mike's imperfect translation: "I need to know if, using this library (libvirt), I can use a function that allows me to capture information sent by applications in parallel to/in addition to information passed by virtual machines" I'm no expert, but I don't think libvirt has access, via virtual networking, to data sent by applications running in virtual machines. My guess is that such data would be accessible in the same way as with physical machines on a physical network (eg tcpdump?). Mike

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Re: [libvirt-users] Fwd: undefining and redefining a Domain from libvirt java bindings
by Osier 13 Oct '10

13 Oct '10

----- "Ravi Pawar" <ravifc(a)gmail.com> wrote: > 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' The error is not throwed by "dm.undefine". looked at and tried your test program, it throws error message like: libvir: QEMU error : Domain not found: no domain with matching name 'tt2' Definitely, it's throwed by: dm =conn.domainLookupByName("tt2"); I guess you looked up the domain by "UUID" before.. so it came the error message saying "no domain with matching uuid .....". The error doesn't influnce the program running forward. e.g. Domain dm1 = conn.domainDefineXML(dumpxml); dm1.create(); int id; id = dm1.getID(); System.out.println(id); dm1.undefine(); You will get the domain ID.. I'm not familiar with Java, guess you can catch the error and turn it into a warning message with "Expection Handler". correct me if I'm not right.. :-) - Osier > > 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 > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users

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