virtio

transfer isoNetwork Configuration for kvm Virtual Machine Network: a) Virtual Network 'default': NAT (default mode, supports Virtual Machine Internet access but does not support mutual access) B) host device vnet0 (depending on the effort): macvtap (supporting mutual access) c) host device vent0 (bridging 'br0') (bridge mode, you can use virtual machines to become hosts with independent IP addresses in the network.) www.2cto.comVirtual Machine option settingsAfter clicking open, you need to rep

Add Nic to centos In Centos 6, the default kudzu identifies that the hardware service does not exist. Basically, all hardware management is managed by Udev... What is udev? Check my other articles. If you add a new hardware, such as the NIC, in Centos 6, you only need to restart udev. start_udev This will re-scan the newly added hardware and perform related processing.If we add a network card, we do not need to edit the content under/etc/sysconfig/network-scripts/if we do not recognize it or som

. Performance Comparison of Three image formats using virtio as the drive of a Virtual Disk Cache = Off Writeback Old qcow2 (0.10.5) 31: 09 min 8: 00 min New qcow2 (0.11.0-rc1) 18: 35 min 8: 41 min Raw 8: 48 min 7: 51 min Summary This article focuses on the format and features of the image file qcow2 used by the QEMU virtual machine, and compares it with the raw format image. Althoug

Linux Kernel 4.7.3 releasedGuideToday, Greg Kroah-Harman, a well-known Linux Kernel developer and maintenance personnel, has released three new Kernel versions: Linux Kernel 4.7.3/4.4.20 LTS/3.14.78 LTS. According to the short update log, the third maintenance version of the Linux Kernel 4.7 branch adjusted a total of 141 files, inserted 1101 files, and deleted 539 files. Greg Kroah-Harman said: "I announced the release of the 4.7.3 kernel version. All 4.7 branch users must complete the upgra

for the VM environment, Open vSwitch also has an impressive feature roadmap that competes with other similar and proprietary solutions.Network Device VirtualizationNIC hardware Virtualization has existed for a period of time in various forms-before the appearance of a vswitch. This section describes implementation and hardware acceleration, which can be used to improve the speed of network virtualization.QEMUAlthough QEMU is a platform simulator, it also provides software simulation for various

| grep nova to check whether the service is enabled, you need to observe the log files of each service in the/var/log/nova/directory in detail to obtain further information. Next, we can use kvm to create an image. $ sudo apt-get install kvm-pxe Install this. Otherwise, a warning will be reported when you run kvm. $ kvm-img create -f raw server.img 5G$ sudo kvm -m 1024 -cdrom rhel5.iso -drive file=server.img,if=virtio,index=0 -boot d -net nic -net us

subsequent steps, we will use the downloaded ISO file to install the virtual machine to this disk, and then customize the configuration. This qcow2-format virtual disk is the final virtual machine image we need. 3. Use the virt-install tool to install from the ISO file (boot the system from the CD) Virt-install-n core-r 1024-c/data_lij/coreOS/coreos_production_iso_image.iso -- disk path =/data/coreOS/coreos_test.qcow2, device = disk, bus = virtio,

和半虚拟化网卡在理论上的区别； 5 网络性能测试工具netperf学习及联系； 6 网卡SRIOV pci passthrough 原理学习、实际环境联系及提交性能测试报告； 第四阶段 虚拟化存储管理 了解qcow2 raw 格式区别及创建方法； 学习lvm管理：创建pv vg lv 并扩展lv，将lv挂载给虚拟机使用； 学习fio iozone磁盘压力测试工具，并提交qcow2 raw lv方式性能对比测试报告； 学习ide全虚拟化方式和virtio半虚拟化方式概念，并提交两种方式性能对比测试报告； 了解libvirt 存储池的概念，并能通过virsh xml文件对libvirt存储池进行管理； 搭建基于系统的nfs存储，挂载给多宿主机，并实现在线虚拟机迁移； 搭建基于系统的ISCSI存储，挂载给多宿主机，并实现在线虚拟机迁移； 搭建DRBD系统，以 ISCSI方式挂载给多宿主机，并实现在线虚拟机迁移； 搭建glusterFS系统，挂载给多宿主机，并实现在线虚拟机迁移；

KVM differs greatly from VMware ESX in some applications, mainly because kvm I/O simulation is implemented in qemu while qemu is implemented in user mode. In this way, switching from KVM to user mode consumes a lot of CPU, and the user mode scheduling efficiency is lower than the kernel thread scheduling. At present, some important devices of kqemu are simulated in kernel mode, such as vhost-net, that is, virtio Nic kernel acceleration. However, some

Operating System 1. Configure the MAC pool Ii. Install Media 1. Synchronize ISO View the current ISO domain Synchronization View View 2. Upload ISO Modify permissions 3. Key Points If you configure and install the VM after synchronizing ISO, you can find the corresponding ISO. If you upload the installation media, you cannot find the corresponding operating system. Remount ISO View 3. Create a virtual machine 1. Virtual Machines New Server Add Nic and Hard Di

your own name, which will not be marked below. There will be a lot of information here. Some useful ...bridgeadapter1="eth0"macaddress1="080027C8DD05"cableconnected1="on"nic1="bridged"nictype1="82540EM"nicspeed1="0"nic2="none"... This part is about the NIC configuration. Nictype1 is displayed, and its value is 82540EM. This value indicates a network card type. In VBox, there are several network card types: AMD PCNet PCI II (Am79C970A);AMD PCNet FAST III (Am79C973, the default);Intel PRO/1000 MT

/rules. d/70-persistent-net.rules file. # PCI device 0x1af4:0x1000 (virtio-pci)SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*l", ATTR{address}=="00:e0:81:78:7b:a8", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"# PCI device 0x10ec:0x8139 (8139cp)SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:e0:81:78:7b:a8", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1" The problem is found. There are two Nic configuration items, which are changed # PC

virtualization alizationVMM: fixed a code analysis bug for certain displacement instructions for VMs running without hardware virtualization alizationVMM: fixed an interpretion bug for TPR read instructions under rare condition (AMD-V only)Snapshots: fixed a crash when restoring an old snapshot when powering off a VM (bugs #9604, #10491)VBoxSVC: be more tolerant against environment variables with strange encodings (bug #8780)VGA: fixed wrong access check which might cause a crash under certain

reliability; 3. the Chunkserver requires at least four NICs for each machine. If the machine only has two NICs on board, you must add one dual-port Nic to bind the four NICs, this improves the network bandwidth; 4. Each host in the KVM cluster acts as the mfs client, mounts the file system of the mfs cluster, and places the Virtual Machine on it; Mfs cluster construction: There are a lot of materials. Optimization suggestions: 1. Use more chunkservers; 2. configure more hard disks for th

dpdk_device_t Field DescriptionLOCKP Send queue lock, when the number of send queue is less than the number of threads to the port to need to lock the packet, LOCKP is an array, each element corresponds to a send queue, that is, each send queue a lockDevice_index The index assigned to port, one per portVlib_hw_if_index Index of the HW structure corresponding to the portVlib_sw_if_index Index of the SW structure corresponding to the portPer_interface_next_index The index of the next node se

Virtualization ofVirtualization means that computer components run on a virtual basis rather than on a real basis. Virtualization technology can expand the capacity of the hardware, simplifying the software reconfiguration process. CPU Virtualization technology can simulate multi-CPU parallelism on a single CPU, allowing one platform to run multiple operating systems at the same time, and applications can be run independently of each other, thereby significantly increasing the productivity of th

provided the open source version of the virtual route in 2002 and was later acquired by Brocade. Vyatta is the enterprise-class product of Bo Tong, the well-known open source router project under Linux, in its official test performance even more than the Cisco 7200 series routers, can support RIP, OSPF, BGP and other routing protocols as well as VPN, NAT, HA and other features. All features of enterprise routing are supported, and virtual machines are supported.Vyos the first version of the pro

the Object object rbd cache writethrough until flush: The default is true, which is to be compatible with the Virtio driver prior to linux-2.6.32, to avoid data not being written back because the flush request is not sent, and after this parameter is set, the librbd writethrough io is executed, until the first flush request is received before switching to writebackWay. Comments: If your Linux client is using 2.6.32, the

networks:[Email protected] ~]# brctl addif br0 eth0 ip addr del dev eth0 10.0.0.111/24 ifconfig br0 10.0.0.1 11/24 up routeadd default GW 10.0.0.2 iptables-f[Email protected] ~]# Virsh edit centos-7.1-x86_64The network bridge inside the KVM virtual machine will become a network segment of the host and can be logged in with the SSH client.If all the IP addresses are MAC addresses, you need to set the IP address to static and set up DNS before you can log in and ping the extranet############

Catch fish in the libvirt. Stove in Nova. Actual effect How to Uninstall Catch fish in the libvirt.There are several ways to load a disc file for a virtual machine, as follows:1. Mount using the IDE mode:virshattach-disk{instance_name}{iso_path}hda--sourcetypeblock--driverqemu--subdriverraw --typecdromThe XML format is as follows:disk type=‘block‘ device=‘cdrom‘> driver name=‘qemu‘ type=‘raw‘/> source dev=‘{iso_path}‘/> target dev=‘hda‘/>disk>2. Mount using SCSI