Re: [CentOS-virt] KVM
Am 08.02.2016 um 22:25 schrieb Gokan Atmaca: If you run top what are you seeing on the %Cpu(s) line? http://i.hizliresim.com/NrmV9Y.png That's not a CentOS system. You should probably consult the community providing support for your Debian or Ubuntu based system. I see you run MySQL, so verify your database configuration against the discussion at https://serverfault.com/questions/363355/io-wait-causing-so-much-slowdown-ext4-jdb2-at-99-io-during-mysql-commit Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Where is QXL driver for Windows?
Am 03.02.2016 um 17:40 schrieb C. L. Martinez: Hi all, Where can I found QXL driver for Windows 2012 R2/Windows 8.1? I don't see inside latest/stable iso images from fedoraproject ... Thanks. Don't know what you are checking, but it is definitely included in https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/latest-virtio/virtio-win.iso Have used it myself just recently for a few Windows Server 2012 R2 VM installs. Regards Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Question Kernel / KVM; Update Centos 7(.1)
Am 08.06.2015 um 14:25 schrieb Günther J. Niederwimmer: Hello, Have Centos a Repository with corrected or newer Packages for KVM. To which bugs do you refer? On my brand new System ;-), but also with my older System. I have big problems with KVM guests slow slow slow, the DomU's are also CentOS 7 You must be doing something wrong. I do not share this experience. virt-manager is also broken with the 7.1 What exactly should be broken? Not on my side The old Bug in the Kernel is really bad, I have several hundreds log from the vcpu0 Problem. Ticket number? thank's for a answer, Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] How many virtual guest 'cpus' can a core duo 'quad' core support
Am 22.02.2012 08:46, schrieb Andreas Reschke: The maximum you can assign to a single VM is the amount of CPUs visible to the KVM host. So a quad core is shows as 4 CPUs to the OS, so you could assign 4 vCPUs to a guest. To see how much is available and seen by KVM run # virsh nodeinfo. - Trey Hello, I think thats not correct. I my case I have a HP N36L Server with one Dualcore Prozessor and 4 guest running. You can overbook the prozessor. Maybe the performance goes down. Gruß Andreas Reschke Andreas, Trey didn't say anything different. You can assign at max the number of physical cores of the KVM host to any VM. So if your KVM host has 4 cores you can have 1 VM with 4 vCPUs. And another VM with 4 vCPUs as well. Then you are overbooked. Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Virtual Machine
Am 09.03.2011 21:38, schrieb Thomas Smith: On Wed, Mar 9, 2011 at 12:15 PM, Mark Smith m.smit...@gmail.com wrote: Ok i am trying the route of what Thomas suggested and i just got this error host does not support virtualization type 'hvm' Your CPU may not support the required virtualization extensions for running Windows in Xen. This command egrep (vmx|svm) /proc/cpuinfo should provide some output. If it does not, you will not be able to run Windows on this particular computer. ~ Tom http://wiki.centos.org/HowTos/Xen/InstallingHVMDomU http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html-single/Virtualization/index.html#sect-Virtualization-Tips_and_tricks-Verifying_virtualization_extensions Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] VMWare 4.1 and CentOS
On Sun, 24 Oct 2010 23:47:09 +0200, Alexander Dalloz ad+li...@uni-x.org wrote: Am 24.10.2010 23:03, schrieb Drew Kollasch: Is there any known issues when trying to run CentOS (x86 or x64) on a fresh install of vmware 4.1? Details as to why I am asking are here in the CentOS forums: https://www.centos.org/modules/newbb/viewtopic.php?viewmode=flatorder=DESCtopic_id=28521forum=39 Thanks! -Drew https://access.redhat.com/kb/docs/DOC-38013 should nail this. That only relates to running as a virtual guest on top of Xen. No mention of VMWare. Steve You are correct, that this knowledge base article only mentions Xen as the hypervisor. Though the OP gets exactly the documented kernel panic and call trace signature. So it is very likely that he is running into this. Regards Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] IP aliases from a QEMU/KVM guest
Hello, I'm trying to set up IP aliases within a QEMU/KVM guest on CentOS 5.5 x86_64, going through a bridged virtualized interface. The virtualized interface in the guest is configured as follow: # ifcfg-eth1 DEVICE=eth1 BOOTPROTO=none PEERDNS=yes GATEWAY=IP.OF.HOST.GATEWAY HWADDR=11:11:11:11:11:11 IPADDR=IP.OF.GUEST.ETH1 NETMASK=255.255.255.255 ONBOOT=yes ARP=yes USERCTL=no IPV6INIT=no # route-eth1 IP.OF.HOST.GATEWAY dev eth1 default via IP.OF.HOST.GATEWAY dev eth1 This is the configuration recommended by the provider (OVH) after a virtual MAC address has been allocated for IP.OF.GUEST.ETH1: http://help.ovh.com/BridgeClient It works fine for virtual interfaces added via libvirt/QEMU. On first reading I thought eth1 would have been your second interface within the guest, besides eth0. Meanwhile I think you just skipped eth0. That is because you can have just 1 default route. The OVH document does not describe a setup for a 2nd interface. Well, even for the 1st interface some settings are strange / unnecessary. Especially when dealing with more than 1 interface, do NOT set the GATEWAY in ifcfg-ethX. By principle always set GATEWAY (in your case GATEWAY=x.y.z.254) in /etc/sysconfig/network. Thus you do not need the route-ethX configuration file, defining a network and a default route. All that is done automatically. If you would have more than 1 interface (the OVH doc does not indicate to be written for such a case, neither notes explicitly to give problems in that case), then following the OVH doc gives you trouble. But when I try to configure an IP alias on another IP address aliasing a virtualized interface, as per the instructions from http://help.ovh.co.uk/IpAlias (and after assigning it a virtual mac just like for eth1) : # ifcfg-eth1:1 DEVICE=eth1:1 BOOTPROTO=none PEERDNS=yes GATEWAY=IP.OF.HOST.GATEWAY HWADDR=22:22:22:22:22:22 An aliases interface does not have an own MAC, it is physically the same MAC as the primary interface. IPADDR=IP.OF.GUEST.ETH1:1 NETMASK=255.255.255.255 ONBOOT=yes ARP=yes USERCTL=no IPV6INIT=no I get the following error when restarting the network: SIOCADDRT: Network is unreachable You created a route-eth1:1 file? and IP.OF.GUEST.ETH1:1 is: - pingable from the same guest - not pingable from other guests by the same provider - not pingable from outside The network infrastructure of the hoster must permit the IP address used to come from MAC of your system. Setting BOOTPROTO=static or commenting out #GATEWAY=IP.OF.HOST.GATEWAY or setting: NETMASK=255.255.255.252 (the IP block was a /30, but I don't think that has something to do here) did not change the behavior. The netmask of 255.255.255.255 is given by intention because of the network layout of your hoster. I'll be interested to hear from experiences with setting IP alias from within a guest. Maybe my problem is due to the configuration of the provider network and it is actually impossible to use IP aliases on virtualized interfaces. Yes, as said, the security design of the hoster must permit the use of defined IPs bound with a dedicated MAC. Ask you hoster. You can add additional IPs to virtualized interfaces - either by definining aliased devices or by adding IPs with the help of ip addr add - but that does not mean they are usable automatically. It is a matter of security in a hosting / virtualized hosting environment. Any opinion/idea welcome! Mathieu Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Vmware to KVM - possible?
Is it possible to convert a VMWare image to KVM? As I have been building a few test machines on Vmware Fusion and would like to migrate some to a KVM server. Thanks in advance. Matt Keating Linux System Admin Yes. Using qemu you can convert from .vmdk to qcow(2) or raw for instance. Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Fault Tolerance
Hi people... I want know if Source Codes Virtulization Solution from Red Hat has be release? Thanks Gilberto Nunes What is the context to the subject Fault Tolerance you have used? Regards Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
