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[libvirt-users] for a guest accessing host "full disk", how to prevent host vgscan
by David Mansfield 23 Dec '11

23 Dec '11

Hi All. I have a dell system with a H700 raid. Within the hardware RAID config I've created a "virtual disk" which I have assigned to one of my guests. On the host the device is "/dev/sdb", on the guest it's "/dev/vdb". This works fine. Within the guest, we have created lvm PV on /dev/vdb (using the whole disk - no partitions) and created a volume group. The guest's hostname is "argo" and the vg is called "vg_argo_bkup". When I reboot the host, it does a vgscan and finds the volume group and activates it in the _host_, which I need to prevent (I think??). I have successfully done this by filtering "/dev/sdb" in /etc/lvm/lvm.conf (which does NOT work as advertised BTW), but referencing the extremely volatile SCSI "sd*" names seems a terrible way to do this. If I fiddle around in the HW raid config, the /dev/sd? may change. I plan on creating about 10 more VM's spread over a number of machines over the next weeks with a very similar setup, and the admin overhead seems like it'll be onerous and error-prone. I'd love to be able to filter the volume groups by VG name instead of pv device node. The host's hostname is "narnia" and I'd love to say, 'vgscan --include-regex "vg_narnia.*"' or something similar, if you get my drift. Does anyone have a best practice for this? I'm sure iSCSI enthusiasts must have the exact same issue all the time. Oh... I'm using centos 6.2 on host and guest, libvirt-0.9.4-23.el6_2.1.x86_64, although it hardly seems a libvirt issue at all, it seems to be a lvm host issue mainly. Thanks, David Mansfield

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Re: [libvirt-users] [virt-tools-list] error creating NFS storage pool
by Cole Robinson 22 Dec '11

22 Dec '11

On 12/16/2011 05:32 PM, Grant Siebrecht wrote: > Virtual Machine Manager 0.9.0 > OS = Ubuntu 11.10 > I've tried changing permissions on my_nfs_server to 777 with still no luck. > > > > Error creating pool: Could not start storage pool: cannot open volume > '/var/lib/libvirt/images/my_nfs_server/.$EXTEND': Permission denied > > Traceback (most recent call last): > File "/usr/share/virt-manager/virtManager/asyncjob.py", line 44, in cb_wrapper > callback(asyncjob, *args, **kwargs) > File "/usr/share/virt-manager/virtManager/createpool.py", line 480, in > _async_pool_create > poolobj = self._pool.install(create=True, meter=meter, build=build) > File "/usr/lib/pymodules/python2.7/virtinst/Storage.py", line 489, in install > raise RuntimeError(errmsg) > RuntimeError: Could not start storage pool: cannot open volume > '/var/lib/libvirt/images/my_nfs_server/.$EXTEND': Permission denied > moving to libvirt-users What is the .$EXTEND file? Is it a socket or something strange like that? - Cole

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[libvirt-users] Error when creating domain with virsh+qemu
by Stefano Ghio 22 Dec '11

22 Dec '11

Cheers, I'm working on Ubuntu server 11.10 32 bit with libvirt 0.9.2 and qemu-kvm 0.14.1. I have a user oneadmin:oneadmin who also belongs to kvm and libvirtd groups. I have set qemu.conf and libvirtd.conf with user/group oneadmin. I have disk.0 and deployment.0 files owned by oneadmin. My system does not support hardware virtualization so I don't have /dev/kvm. I'm able to start VM with qemu anyways but when issuing the command: virsh -c qemu:///system create deployment.0 I get: error: Failed to create domain from deployment.0 error: internal error process exited while connecting to monitor: 13:00:52.354:1291: info: libvirt version: 0.9.2 13:00:52.371: 1291: debug : virCommandHook:1826 : Waiting on parent for handshake complete on 23 13:00:52.371: 1291: debug : virCommandHook:1842 : Hook is done 0 open /dev/kvm: No such file or directory failed to initialize KVM: Operation not permitted "error while connecting to monitor" looks to me as something permission-related but I tried a lot of combinations between the qemu and libvirt conf files and nothing worked (yes, I always restarted the system after every change). If I start the same image with sudo /usr/bin/qemu-system-i386 -hda disk.img -boot d -m 384 it works Any help? Thanks -- Dr. Stefano Ghio - ENG Engineering Italy Website: http://groglogs.blogspot.com/ *If you received this message but you are not its recipient, please ignore it and warn me, thank you.*

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[libvirt-users] Issue with IPMI (and KVM) on RHEL 6
by Jawahar Tadipatri 21 Dec '11

21 Dec '11

Hi folks, We experiencing some difficulties in getting IPMI to work on RHEL 6 running as Guest using KVM. We have verified that IPMI works on RHEL 6 if installed on bare metal. Is this a known issue? Can anyone please suggest a fix or work-around for this problem? *RHEL 6 as guest os with kvm on RHEL 6 as host os -- doesn't work* RHEL 6 (client) on bare metal (i.e., the above mentioned host os)-- works Below is the the output of the command (just an indication that it failed) and relevant part of dmesg . # service ipmi start Starting ipmi drivers: [FAILED] # dmesg | tail -12 ipmi message handler version 39.2 IPMI System Interface driver. ipmi_si: Adding default-specified kcs state machine ipmi_si: Trying default-specified kcs state machine at i/o address 0xca2, slave address 0x0, irq 0 ipmi_si: Interface detection failed ipmi_si: Adding default-specified smic state machine ipmi_si: Trying default-specified smic state machine at i/o address 0xca9, slave address 0x0, irq 0 ipmi_si: Interface detection failed ipmi_si: Adding default-specified bt state machine ipmi_si: Trying default-specified bt state machine at i/o address 0xe4, slave address 0x0, irq 0 ipmi_si: Interface detection failed ipmi_si: Unable to find any System Interface(s) Please revert if any more information is needed. Thanks and Regards, Jawahar

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[libvirt-users] Virt-Manager + IDE Controller
by Paul K. Alabi 19 Dec '11

19 Dec '11

Hi , i m currently running CentOS 5.4 on a Dell C2100 . I have virt-manger , livirt installed but i can't get my VMs to mount more than 4 IDE disk ( i have 8) . I would like to know how to mount ALL 8 Disk on my VM . P ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.

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[libvirt-users] Using libvirt networking properly.
by Andrew Spiers 19 Dec '11

19 Dec '11

Hi, I'm interested in a setup in which one guest receives all its networking services (routed IPv4, dhcp, tftp, dns) from another, which is connected via a routing through the hypervisor. I think this is a lot like Guest C and Guest B in the diagram at http://libvirt.org/archnetwork.html. I have experimented with setting the network between Guest B and the hypervisor as a routed network, and the network between Guest B and Guest C as an isolated network. The problems I am having is that I am not sure how to set up a persistent static route to Guest C via Guest B, (I created a file with the route called route-virbr3 in /etc/sysconfig/network-scripts on the hypervisor, but it doesn't seem to do anything), and the changes I need to make to allow traffic with Guest C's source IP to come from Guest B's interface with the hypervisor seems to get overwritten or superceded by additional rules that are created when I start my machine.) I can see something about a qemu-ifup script mentioned at http://www.linux-kvm.org/page/Networking. Should I create something like that and put some sort of `ip route add` command in it? When should that script be called? Is there a way to specify the necessary firewall and routing rules in the xml network configuration? I am working with a Fedora 16 hypervisor and Guest B is a Centos 6 machine. I'd like to use all sorts of different distributions where Guest C is. Regards, Andrew.

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[libvirt-users] network problems with some cloned vm
by xuteng 17 Dec '11

17 Dec '11

Hi,All: Using KVM + libvirt + virt-manager, I meet a strange problem , some cloned vm cannot get correct ip address via bridge network, but some vm can. My host ip is 192.168.1.8 , a bridge interface br0 , an ethernet interface eth0 When the vm(win7) started ,I got the information like " ip 169.254.XXX.XXX netmask 255.255.0.0" by ipconfig Here is the host network settings: [root@kvm-8 ~]# ifconfig br0 Link encap:Ethernet HWaddr BC:AE:C5:21:C8:FB inet addr:192.168.1.8 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::beae:c5ff:fe21:c8fb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:59381 errors:0 dropped:0 overruns:0 frame:0 TX packets:52495 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:7078092 (6.7 MiB) TX bytes:50729969 (48.3 MiB) eth0 Link encap:Ethernet HWaddr BC:AE:C5:21:C8:FB inet6 addr: fe80::beae:c5ff:fe21:c8fb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:60238 errors:0 dropped:0 overruns:0 frame:0 TX packets:76409 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:8037333 (7.6 MiB) TX bytes:52546222 (50.1 MiB) Memory:fbee0000-fbf00000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:11312 errors:0 dropped:0 overruns:0 frame:0 TX packets:11312 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:36054480 (34.3 MiB) TX bytes:36054480 (34.3 MiB) virbr0 Link encap:Ethernet HWaddr D2:38:52:7D:0D:5D inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vnet0 Link encap:Ethernet HWaddr FE:54:00:A1:A1:90 inet6 addr: fe80::fc54:ff:fea1:a190/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:134 errors:0 dropped:0 overruns:0 frame:0 TX packets:247 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:24091 (23.5 KiB) TX bytes:15846 (15.4 KiB) [root@kvm-8 ~]# brctl shows: [root@kvm-8 ~]# brctl show bridge name bridge id STP enabled interfaces br0 8000.bcaec521c8fb yes eth0 vnet0 virbr0 8000.000000000000 yes [root@kvm-8 ~]# Any information would be appreciated Thank you! wade xuteng via foxmail

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[libvirt-users] Qemu restore error
by Dennis Householder 15 Dec '11

15 Dec '11

Hello, I'm not sure if I am having a kvm/qemu issue, a virt-manager issue, or a libvirt issue, so if I am asking the wrong crowd please let me know! In short, restoring some suspended kvm guests via virt-manager is failing because libvirt cannot read the qemu header. I cannot find any documentation on what this means. From virsh's limited documentation I was able to gather that there is probably something wrong with an xml file somewhere, but I cannot find it. Any advice is greatly appreciated! Synopsis: I have 5 KVM guests on a Fedora 16 laptop host. I manage them locally through virt-manager. These guests are JUNOS 10.1R1 (installed over FreeBSD 4.1 mini-inst) on a patched bios (SeaBIOS pre-0.6.1-20100805_064324-Compaq8510w). One time I suspended my laptop and the kvm domains were suspended as well. Trying to restore yields the following error: Error restoring domain: operation failed: failed to read qemu header Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 44, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 65, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/domain.py", line 1050, in startup self._backend.create() File "/usr/lib64/python2.7/site-packages/libvirt.py", line 510, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: operation failed: failed to read qemu header #end error output Package version info: libvirt-python-0.9.6-2.fc16.x86_64 libvirt-0.9.6-2.fc16.x86_64 libvirt-client-0.9.6-2.fc16.x86_64 gpxe-roms-qemu-1.0.1-4.fc16.noarch qemu-system-x86-0.15.1-3.fc16.x86_64 qemu-common-0.15.1-3.fc16.x86_64 qemu-kvm-0.15.1-3.fc16.x86_64 qemu-img-0.15.1-3.fc16.x86_64 virt-manager-0.9.0-7.fc16.noarch virt-manager-common-0.9.0-7.fc16.noarch virt-viewer-0.4.1-3.fc16.x86_64 Again, any advice is appreciated. I hope I have provided enough info. Thank you for your time! -- Dennis CONFIDENTIALITY NOTICE: The information contained in this message may be privileged and/or confidential. If you are not the intended recipient, or responsible for delivering this message to the intended recipient, any review, forwarding, dissemination, distribution or copying of this communication or any attachment(s) is strictly prohibited. If you have received this message in error, please notify the sender immediately, and delete it and all attachments from your computer and network.

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[libvirt-users] Adding a public static IP address to the guest
by Sudheer Satyanarayana 14 Dec '11

14 Dec '11

Hello, The host runs on CentOS 6. I have installed a guest, CentOS 5.7, using libvirt. I am having difficulty understanding how to assign a public static IP address to the guest. From what I understand by reading the Wiki, I think I require routed mode. The ISP has provided a 'portable' IP routed to the VLAN of our servers. I want to assign this IP address to the guest. From the virtual machine hardware details window, I see that "Virtual network 'default' : NAT" is selected for the source device field. Can someone offer a helping hand and instruct and educate me on how to proceed from here? Thanks. -- With warm regards, Sudheer. S

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[libvirt-users] acceptable SASL mechanisms/can libvirt authenticate against PAM
by Dave Allan 14 Dec '11

14 Dec '11

I was playing with SASL authentication a bit today and I wasn't able to get libvirt to authenticate against PAM (or anything else except the sasldb, although I didn't try Kerberos). Does anybody know off the top of their head what mechanisms/password check options work? I'm trying to figure out if I'm attempting the impossible. Dave

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