virt

virt@lists.centos.org

1608 discussions

Upgrade of CentOS and libvirt: need help on configuring network
by Schut, Koos J J (Koos) 24 Sep '13

24 Sep '13

I upgraded from CentOS 5.9 to CentOS 6.4. I try to reuse my virtual machines and am only partially successful: I can run them, I just cannot get the network OK and need some help with that. What I had in the past was pretty simple: both the host and the VM's used eth0 and each had an IP in the same subnet and could communicate freely. With the new install it seems somewhat more complex and I think I need to configure a bridge and use that. Unfortunately, info I find through google is overwhelming and confusing. All examples either configure something else, or the outcome is not what expected. So: how to go about setting things up to have say: My physical machine is on 192.168.0.90 My Virtual machines are on 192.168.0.100 and 101. These are to be fixed addresses. The 2 VM's have to communicate with each other and with the physical machine. The VM's do not necessarily need to communicate with the rest of the world. The physical machine needs to communicate with the rest of the world. I use: - CentOS-6.4_64 - Virtual Machine Manager 0.9.0 - xen 4.2.3 - libvirt 0.10.2.7-5 - VM's show Hypervisor = xen (fullvirt) - Emulator = qemu-dm - NIC points to Shared device name virbr0 - on the host, virbr0 has IQ 192.168.122.1 I have been fighting this for 2 weeks, now. I tried to follow several advises which resulted in either the VM's not connecting to anything, or my host losing its connection to the rest of the world, or both. So either I still do something not-right, or I follow the wrong gidelines. Can someone give me a push in the right direction, please? Koos

4 3

Teh is away for vacation until 5th October
by jyteh＠exabytes.com 23 Sep '13

23 Sep '13

Thank you for your message. I will be away for vacation in US from 21st Sept to 5th October. Shall you have any request , you can drop an email to my team at server-support(a)exabytes.com.my

1 0

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.

5 14

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 *

1 0

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 ...

3 2

Free Mem
by Deron 30 Aug '13

30 Aug '13

Hello, I am not sure if this is the correct Mailing list for the issue I have. I have a new system with 18GB of Physical memory on the system. I loaded CentOS 6.4. But when I boot into Dom0, I only see (xm info) 2GB of total memory? I set 1GB for Dom0, but I am not sure why the hypervisor does not see all the memory. [root@barbaro images]# xm info host : <host>.<domain> release : 3.4.54-8.el6.centos.alt.x86_64 version : #1 SMP Tue Jul 23 17:29:30 UTC 2013 machine : x86_64 nr_cpus : 4 nr_nodes : 1 cores_per_socket : 4 threads_per_core : 1 cpu_mhz : 2133 hw_caps : bfebfbff:28100800:00000000:00003b40:009ce3bd:00000000:00000001:00000000 virt_caps : hvm total_memory : 2037 free_memory : 988 free_cpus : 0 xen_major : 4 xen_minor : 2 xen_extra : .2-23.el6 xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 xen_scheduler : credit xen_pagesize : 4096 platform_params : virt_start=0xffff800000000000 xen_changeset : unavailable xen_commandline : dom0_mem=1024M,max:1024M loglvl=all guest_loglvl=all cc_compiler : gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3) cc_compile_by : mockbuild cc_compile_domain : centos.org cc_compile_date : Thu Jul 18 13:42:23 UTC 2013 xend_config_format : 4 Thanks. If you have any suggestions that would be great. Deron

2 2

Question about DomU in the 3.4 kernel
by Will Public 27 Aug '13

27 Aug '13

Hi all, I am trying to straighten a few things out in my mind. I understand with xen 4, and the current kernel in xen4centos, it has dom0 support now so you can install the tool stack in Centos 6.4. However, can I still use this kernel in a CentOS 6.4 guest and get DomU support and be full PV? I.E getting away from HVM and PV-HVM is my goal. Thanks!

2 1

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

virt