virtio

every single action then we want to run into the XML file. This is a lot more flexibility and troubleshooting issues while writing those scripts becomes a cakewalk, Especia Lly using virtual machine snapshots.Here is the actions that is performed in Detail:specialize The most important feature:setting the Cloudbase Solutions wallpaper. Enabling ping response in the firewall (NOTE:RDP access was enabled in the XML file). Downloading the Firstlogon script. Firstlogon

cloud host environment, the entire IO stack is relatively long, involving the application layer/filesystem/block layer and the driver layer, the virtualization layer, the host OS filesystem/block layer and the driver layer in the guest OS. Because of the number of facets involved, so any one of the link problems will cause performance degradation, but also for the tracing of IO increased the difficulty.From this information, we first ruled out the host file system and the block layer and the dr

on VM performance, and focus on host memory utilization, you can consider open, and Vice- Under/etc/init.d/, the service name is KSM and ksmtuned.DiskDisk optimizations include: VIRTIO-BLK, Cache mode, AIO, block device IO SchedulerVirtioSemi-virtualized IO device, for CPU and memory, KVM is full virtualization device, and for disk and network, there is a semi-virtualized IO device, the purpose is to standardize the data exchange interface between gu

the access interface for and application "All Files" in the Linux system. Each device has a device file in the/dev directory, such as/DEV/SDA for the first scsi/ide disk, and/dev/vda for the first virtio. Applications access these devices by accessing these device files as if they were operations files, and the interfaces that can be used include: int open (const char *path, int oflag, ...) int close (int fd); ssize_t Write (int

First, the disk read and write emotion can test1, disk benchmark reading test To use a native IDE hard disk for a benchmark read test: For the sake of comparison, I am still using another disk, the Virtio drive, after the Virsh edit KVM XML file, modify the original disk mode, still use the original disk test method: The average read speed of the Virtio-driven SCSI har

Made in Ubuntu 12.04 1. Download Virtio Http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/bin/virtio-win-0.1-30.iso 2. Download Windows Server 2008 In this case, the mirror name is Windows2008.iso 3. Kvm-img create-f qcow2 windowsserver.img 20G 4. Kvm-m 1024-cdrom windows2008.iso-drive file=windowsserver.img,if=

# Virsh dumpxml winvm01> winvm01.xml # currently running Virtual Machine winvm01# Cat winvm01.xml # export an XML file# Virsh dumpxml c5vm01> c5vm01. xml# Cat c5vm01. xml# Virsh-C xen: // domxml-to-native xen-XM winvm01.xml> winvm01.conf# Cat winvm01.conf# Virsh-C xen: // domxml-to-native xen-XM c5vm01. xml> c5vm01. conf Generally, the name of the virtual machine is obtained by using the XM command, and then the XML file of the virtual machine is obtained by using virsh dumpxml But what abo

Document directory Network Type Kernel Driver Recently, I found that the network performance of the virtual machine has encountered a bottleneck, so I want to find out that I have ignored this knowledge, so I took a note.1. VirtualBox Eshizhan is commonly used in VirtualBox, hereinafter referred to as Vbox. Start with it: Network Adapter According to the official documentation, five network adapters can be simulated in Vbox, AMD PCNet pci ii (Am79C970A ); AMD PCNet fast iii (Am79C973,De

is also saved in the/var/log/dmesg file. Some hardware devices (such as the 7th signaling card and voice card) usually install the driver (kernel module) during installation and print some information so that they can be viewed through the dmesg command. Check whether KVM is loaded at startup. Dmesg | grep KVMQuick Start The following process is required to create a virtual machine: Create a virutal Hard Disk Qemu or KVM is started with this disk and specified to install ISO Like instal

The network adapter type and virtual network performance optimization in VMware and VirtualBox recently found that the network performance of the Virtual Machine encountered a bottleneck, so I tried to find out that I have always ignored this knowledge, so take a note. 1. virtualBox www.2cto.com eshizhan is commonly used in VirtualBox, hereinafter referred to as Vbox. Start with it: Check the official documentation for network adapters and find that Vbox can simulate five network adapters, AMD P

, + xtpr, + tm2, + vmx, + ds_cpl, + monitor, + dtes64, + pbe, + tm, + ht, + ss, + acpi, + ds, + vme-enable-kvm-m 2048-smp 2, sockets = 2, cores = 1, threads = 1-uuid f8450270-9d96-4dba-b1c2-8ebcef1ff012-no-user-config-nodefaults-chardev socket, id = charmonitor, path =/var/lib/libvirt/qemu/instance-00000074.monitor, server, nowait-mon chardev = charmonitor, id = monitor, mode = control-rtc base = utc, driftfix = slew-no-kvm-pit-reinjection-no-shutdown-device piix3-usb-uhci, id = usb, bus = pci.0

When you convert a Windows virtual machine's VMDK file to Qcow2 by qemu-img and upload the file to OpenStack, the virtual machine fails to start. This is analyzed because OpenStack uses the Virtio driver by default and the Windows virtual machine does not have the Virtion driver installed.Workaround: Installing the Virtio drive1. Open the Windows virtual machine via Virt-manager2, disk, network card using t

QEMU Guest AgentIt is a daemon program running inside the domain which are supposed to help management applications with executing function s which need assistance of the guest OS. For example, freezing and thawing filesystems, entering suspend. However, guest agent (GA) is not bullet proof, and hostile guest OS can send spurious replies.Setting QEMU GA upCurrently, QEMU exposes GA via Virtio serial port. There is some attempts to allow applications t

." 】 2. Get Windows Driver for Virtio "This driver is used primarily for Windows NICs and hard drives" Cd/var/lib/libvirt/imagewget Https://alt.fedoraproject.org/pub/alt/virtiowin/latest/images/bin/virtio-win-0.1-81.iso 3. Image format conversion on target machine K and create a new disk file "This disk file is used primarily for Windows to install a new

First, KVM Introduction(KVM is a shorthand for kernel virtual module) KVM is the latest virtualization technology product from Red Hat's 5.4 release. It and vpc,virtual box are all part of a fully virtualized product, and Xen is a semi-virtualized product. While KVM is fully virtualized, support for semi-virtualized virtio on critical hard drives and network cards is largely improved, KVM is a lightweight virtualization representative, and hardware VT

First, the KVM installs the image through the ISO1. Generate an empty IMG fileQemu-img create-f qcow2/opt/data/rock-feibiao/slse11-sp4/sles-11-sp4-dvd-x86_64-gm-dvd1.img-opreallocation= Metadata 20G2. Reference XML file: Change name ISO location IMG LocationThe default CPU mode uses the IDE hard drive and the Virtio driver can be installed later# More/opt/data/rock-feibiao/slse11-sp4/sles-11-sp4-dvd-test.xml--3. Start and log in the virtual machineVir

Openstack qcow2 Image File CreationI. Linux image file generationA. Bridging network device script[Root @ app10-051 ~] # Cat/etc/qemu-ifup#! /Bin/bash# Bridging network devicesSwitch = br0If [-n $1]; thenIp link set $1 upBrctl addif $ {switch} $1Exit 0ElseEcho "no interface! "Exit 1FiCreate a qcow2 FileQemu-img create-f qcow2 centos_6.5.qcow2 20GCreate a linux Image/Usr/libexec/qemu-kvm-m 1024-cdrom iso/CentOS-6.5-x86_64-minimal.iso-drive file = centos6.5-30G. qcow2, if =

-S -machine pc-i440fx-trusty,accel=tcg,usb=off -m 2048 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid f3fdf038-ffad-4d66-a1a9-4cd2b83021c8 -smbios type=1,manufacturer=OpenStack Foundation,product=OpenStack Nova,version=2014.2,serial=564d2353-c165-6238-8f82-bfdb977e31fe,uuid=f3fdf038-ffad-4d66-a1a9-4cd2b83021c8 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-00000002.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=contro

I.. configuring a KVM Server1. Configure Virtio Sourcewget Https://fedorapeople.org/groups/virt/virtio-win/virtio-win.repo-O/etc/yum.repos.d/virtio-win.repo2. Install related software packagesYum Install virt-v2v Libguestfs-winsupport Virtio-winSecond, prepare to be converte

.example.comOvesetup_rhevm_support/redhatsupportproxyport=none:noneOvesetup_rhevm_support/redhatsupportproxy=none:noneOvesetup_rhevm_support/redhatsupportproxyuser=none:noneOvesetup_rhevm_support/configureredhatsupportplugin=bool:falseOvesetup_rhevm_support/redhatsupportproxypassword=none:noneOvesetup_rhevm_support/redhatsupportproxyenabled=bool:falseOvesetup_rhevm_dialog/confirmupgrade=bool:trueOvesetup_config/websocketproxyconfig=bool:true3. View the default ISO domain file [Root@rhevm ~]# sh