virt September 2013

virt@lists.centos.org

17 participants
16 discussions

Automatic startup xen domains
by carlopmart 18 Sep '13

18 Sep '13

Hi all, I have installed a CentOS 6.4 x86_64 host with official centos-xen packages. I am using virt-manager to create, remove, etc .. vmachines. All works really really well except automatic domains startup. Where libvirtd stores domains configurations?? Under /etc/libvirtd/qemu not, like it does when I use kvm instead of xen. Then, how can I automatic startup certain xen domains?? Thanks.

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Custom CentOS
by Mr.Pine 10 Sep '13

10 Sep '13

Hi, I want to create *create custom centos iso (minimal CentOS 6.4 x64 + KVM tools). maybe I can call it custom distru. * *I appreciate any hint. * *any Idea other than kickstart ! * *TNX *

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Percentage of the whole screen with spice client
by carlopmart 07 Sep '13

07 Sep '13

Hi all, Somebody knows how can I assign screen geometry as a percentage of the whole screen like rdesktop does?? For example: "spicec -g 80%". Maybe using xorg.conf specific configuration?? Thanks.

2 1

"lxc-centos" container automation script
by Johannes Graumann 03 Sep '13

03 Sep '13

Hello, For me as a debianista who has need to run some software (Kolab) in the vendor(provider)-supported OS (CentOS), LXC is a godsend. However, lxc distributions I am aware of do not ship the "lxc-fedora" or "lxc-debian" equivalent to construct a container. I have thus set out to modify the former (please find the result attached). In the process of getting that to work yum/rpm presents me with the following errors: Installing : filesystem-2.4.30-3.el6.x86_64 3/128 warning: group lock does not exist - using root warning: group mail does not exist - using root Installing : sysvinit-tools-2.87-4.dsf.el6.x86_64 47/128 warning: group tty does not exist - using root Installing : libutempter-1.1.5-4.1.el6.x86_64 59/128 warning: group utempter does not exist - using root warning: group utmp does not exist - using root Installing : util-linux-ng-2.17.2-12.9.el6_4.3.x86_64 121/128 warning: group tty does not exist - using root Installing : initscripts-9.03.38-1.el6.centos.2.x86_64 122/128 chmod: cannot access `/var/lib/random-seed': No such file or directory Non-fatal POSTIN scriptlet failure in rpm package initscripts-9.03.38-1.el6.centos.2.x86_64 warning: %post(initscripts-9.03.38-1.el6.centos.2.x86_64) scriptlet failed, exit status 1 I was wondering whether anyone here could advise on how to circumvent these issues. Optimally I'd like to prevent them (which may not be feasible given the "chroot" nature of the install). How to fix this from within a running container would also be most welcome information ... Thank you for your consideration. Sincerely, Joh

1 0

KVM - Network bridge issue - lots of overruns
by AemNet 02 Sep '13

02 Sep '13

Hi everybody I've a very big network problem with some server running CentOS with KVM and some linux-like VMs on the top of it. The vm's network is bridged with a physical dedicate NIC (an Intel PRO/1000) with 2.4.14-NAPI driver (but the problem persists with various versions of the driver) and the CentOS version is 6.4 (same problem with a 5.7 sever) with all the last updates. Randomly I get a lots of overruns on the vnet device on the physical server ad obviously some packet were lost in the VM. brctl show br1 bridge name bridge id STP enabled interfaces br1 8000.002655e7590d no eth3 vnet1 ifconfig vnet1 vnet1 Link encap:Ethernet HWaddr FE:54:00:BF:27:12 inet6 addr: fe80::fc54:ff:febf:2712/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13358349859 errors:0 dropped:0 overruns:0 frame:0 TX packets:21831525660 errors:0 dropped:0 overruns:1746068 carrier:0 collisions:0 txqueuelen:500 RX bytes:5080769358430 (4.6 TiB) TX bytes:16548002754111 (15.0 TiB) As you can see there are a huge numbers of overruns also if the physical NIC is dedicate solely to this VM and the network traffic is less than 150Mbps. The server is a quite new machine (HP DL120 G6) but I have the same problem on an old DL360 G5 (but this is running about 10 vms). What can I do to solve the problem? My idea was to use the KVM passthrough functionality for the network device, but this method isn't good for a server that runs more than 2 vms as my 360G5... Thanks Beppe PS sorry for my bad english

1 0

Where are snapshots stored??
by C. L. Martinez 02 Sep '13

02 Sep '13

HI all, I have created a snapshot for a kvm guest but only for one of disks assigned to it: qemu-img snapshot -c osvol_base /vmachines/vmtst/osvol.img and qemu-img snapshot shows me: Snapshot list: ID TAG VM SIZE DATE VM CLOCK 1 osvol_base 0 2013-08-29 11:37:23 00:00:00.000 It seems ok, but where is this snapshot stored?? I didn't find it ...

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virt September 2013