libvirt

kvm虚拟化安装与部署(2)

旧巷老猫 提交于 2020-01-07 15:38:11
一、虚拟化VT开启确认   KVM 本身也有一些弱点,那就是相比裸金属虚拟化架构的 Xen 、 VMware ESX 和 HyperV , KVM 是运行在 Linux 内核之上的寄居式虚拟化架构,会消耗比较多的计算资源;不过针对这一点, Intel 、 AMD 已经在处理器设计上有专门的VT-x 和 AMD-V 扩展,这种特性在每次硬件更新的时候也会更新,往往每次更新后都对虚拟化性能和速度上有明显的提升,所以长远来看,也不是什么大问题。   KVM 的虚拟化需要硬件支持(需要处理器支持虚拟化:如 Intel 厂商的 Intel-VT ( vmx )技术&&AMD 厂商的 AMD-V ( svm )技术。是基于硬件的完全虚拟化。而 Xen 早期则是基于软件模拟的半虚拟化( Para-Virtualization ),新版本则是基于硬件支持的完全虚拟化。但 Xen 本身有自己的进程调度器,存储管理模块等,所以代码较为庞大。    你当前的 CPU 是否支持 VT 技术?当不确定你当前 CPU 是否支持 VT 技术时   1. 可以在 windows 下使用 cpu-z 软件来进行测试   2. 可以在 Linux 下查看 CPU 的相信信息来确定    CPU 虚拟化给我们带来了哪些好处?   CPU 的虚拟化技术可以将单 CPU 模拟多 CPU 并行

virt-manager无法启动的问题

你说的曾经没有我的故事 提交于 2019-12-30 14:59:03
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> virt-manager无法启动,出现如下问题 [root@lactsys Desktop]# virt-manager Traceback (most recent call last): File "/usr/share/virt-manager/virt-manager.py", line 383, in <module> main() File "/usr/share/virt-manager/virt-manager.py", line 246, in main from virtManager import cli File "/usr/share/virt-manager/virtManager/cli.py", line 29, in <module> import libvirt ImportError: No module named libvirt [root@lactsys Desktop]# 思路:修改/etc/libvirt/libvirtd.conf中: vim /etc/libvirt/libvirtd.conf log_outputs="3:syslog:libvirtd" #去掉注释,是日志输出到系统日志中,便于调试 [root@lactsys libvirt]# which

kvm

我的梦境 提交于 2019-12-19 10:56:09
#yum install qemu-kvm libvirt libvirt-python libguestfs-tools virt-install python-virtinst libvirt-cilent virt-viewer kvm virt-manager -y yum groupinstall "X Window System" #yum groupinstall "GNOME Desktop" #startx #yum install upgrade device-mapper-libs #/etc/init.d/libvirtd start #virt-manager 来源: 51CTO 作者: 华仔的博客 链接: https://blog.51cto.com/hzcto/2459797

Python libvirt API - create a Virtual Machine

一世执手 提交于 2019-12-18 13:31:00
问题 I am trying to create a python script to handle basic VM operations like: create a VM, delete a VM, start, stop, etc. Currently I'm rather "stuck" on create From the command line you would do something like: qemu-img create -f qcow2 vdisk.img <size> virt-install --virt-type kvm --name testVM --ram 1024 --cdrom=ubuntu.iso --disk /path/to/virtual/drive,size=10,format=qcow2 --network network=default --graphics vnc,listen=0.0.0.0 --noautoconsole --os-type=linux And that will create a new VM

Centos-Libvirt: For running vm, virsh vol-delete command fails while deleting SCSI disk image: cannot unlink file 'XXX': Success

旧时模样 提交于 2019-12-13 01:50:24
问题 Description of problem: On Centos machine, if we try to delete the SCSI disk image for running vm (which is added via virt-manager) through virsh vol-delete command, getting "cannot unlink file 'XXX': Success" error. This error occurs intermittently and occurs only if we try to delete disk image when vm is running. Version-Release number of selected component (if applicable): OS:CentOS Linux release 7.2.1511 Libvirt: [root@CV-HJ-CentOS7-02 images]# virsh version Compiled against library:

Pass kickstart file to virtual manager xml file

百般思念 提交于 2019-12-12 23:29:36
问题 I need to pass kickstart file to xml for creating a virtual device using virt-install. <os> <type arch="x86_64" machine="pc-i440fx-xenial">hvm</type> <loader>/usr/lib/xen/boot/hvmloader</loader> <kernal>/boot/vmlinuz-3.10.0-327.el7.x86_64</kernal> <initrd>/boot/initrd.img-4.4.0-59-generic</initrd> <cmdline>ks=http://ipaddr/try.cfg ip=ip netmask=255.255.255.0</cmdline> <bootmenu enable="yes" /> </os> Is this the right way? I followed the steps given in this tutorial. But I get the following

`vagrant up` times out at “Waiting for domain to get an IP address…”

断了今生、忘了曾经 提交于 2019-12-12 14:29:56
问题 This appears to only happen when I'm using the generic/arch box. I've tried several ubuntu boxes and everything works fine. Host OS is Manjaro. It's freezing with output: INFO interface: info: ==> default: Waiting for domain to get an IP address... ==> default: Waiting for domain to get an IP address... INFO retryable: Retryable exception raised: #<Fog::Errors::TimeoutError: The specified wait_for timeout (2 seconds) was exceeded> libvirt/virsh version 3.10.0 vagrant version 2.0.1 OS 4.9.76-1

Using IVSHMEM with libvirt virt-manager

不问归期 提交于 2019-12-11 06:36:31
问题 Using ivshmem in qemu requires the following steps. Start ivshmem server in host ./ivshmem_server which will create a unix domain socket /tmp/ivshmem_socket Start qemu with the following command line options- -chardev socket,path=/tmp/ivshmem_socket,id=ivshmem_socket -device ivshmem,chardev=ivshmem_socket,size=1m Now if we do lspci in guest, the ivshmem pci device is shown in it. How can I do the same in virt-manager? Specifically, I want to do 2 things. Pass the above command line option to

KVM made with Libvirt not persisting after host restart

≯℡__Kan透↙ 提交于 2019-12-11 05:32:12
问题 I currently am making a ubuntu KVM with libvirt using the following code import libvirt conn = libvirt.open('qemu:///system') pool_name = 'VMPOOL' name = 'ubuntu0' pools = conn.listAllStoragePools(0) for pool in pools: # check if pool is active print(pool.isActive()) if pool.isActive() == 0: #activate pool pool.create() stgvols = pool.listVolumes() print('Storage pool: '+pool.name()) for stgvol in stgvols : print(' Storage vol: '+stgvol) def createStoragePool(conn, pool_name): xmlDesc = """

虚拟化——libvirt

。_饼干妹妹 提交于 2019-12-10 02:03:51
一句话:一个工具,用于统一管理不同的虚拟化设施(xen、qemu、vmware……)。 官网: http://libvirt.org 图示: 第一个图,表现出使用libvirt的一种情况(用例),第二个图远程监控,正如openstack,一般各个计算节点运行虚拟化,控制节点可以管理、监控虚拟化。 网上更多的定义: Libvirt是一个软件集合,便于使用者管理虚拟机和其他虚拟化功能,比如存储和网络接口管理等等。这些软件包括一个API库、一个daemon(libvirtd)和一个命令行工具(virsh)。Libvirt的主要目标是:提供一种单一的方式管理多种不同的虚拟化提供方式和hypervisor。比如,命令行“virsh list -- all”可以列出所有任何支持的、基于hypervisor的虚拟机,这就避免学习、使用不同hypervisor的特定工具。 libvirt功能: “使用libvirt”,意味着使用virsh、virt-manager、virt-install等工具管理虚拟机,这些工具都是围绕着libvirt开发的。人们不再直接使用基于XEN的xm、或是qemu/qemu-kvm等二进制工具。 虚拟机管理: 包括不同的领域生命周期操作,比如:启动、停止、暂停、保存、恢复和迁移。支持多种设备类型的热插拔操作,包括:磁盘、网卡、内存和CPU。 远程机器支持: