qemu

Hypervisor, KVM, QEMU总结

醉酒当歌 提交于 2020-01-07 20:29:47
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Hypervisor 概念 作用 种类 特点 多Hypervisor QEMU和KVM KVM QEMU QEMU-KVM libvirt Hypervisor 1.概念 Hypervisor——一种运行在基础物理服务器和操作系统之间的中间软件层,可允许多个操作系统和应用共享硬件。也可叫做VMM( virtual machine monitor ),即虚拟机监视器。 Hypervisors是一种在虚拟环境中的“元”操作系统。他们可以访问服务器上包括磁盘和内存在内的所有物理设备。Hypervisors不但协调着这些硬件资源的访问,而且在各个虚拟机之间施加防护。当服务器启动并执行Hypervisor时,它会加载所有虚拟机客户端的操作系统同时会分配给每一台虚拟机适量的内存,CPU,网络和磁盘。 2.作用 Hypervisor是所有虚拟化技术的核心。 非中断地支持多工作负载迁移的能力是Hypervisor的基本功能。 3.种类 目前市场上各种x86 管理程序(hypervisor)的架构存在差异,三个最主要的架构类别包括: I型:虚拟机直接运行在系统硬件上,创建硬件全仿真实例,被称为“裸机”型。 裸机型在虚拟化中Hypervisor直接管理调用硬件资源,不需要底层操作系统

在CentOS7上安装KVM虚拟化软件

家住魔仙堡 提交于 2020-01-07 18:31:27
在CentOS7上安装KVM虚拟化软件 CentOS7.6虚拟化软件: KVM是基于内核的虚拟机(Kernel-based Virtual Machine)。 QEMU软件(qemu-kvm)能够创建和管理 KVM 虚拟机。 Libvirt是一套提供了多种语言接口的API,为各种虚拟化工具提供一套方便、可靠的编程接口,不仅支持 KVM,而且支持 Xen 等其它虚拟机。 Virsh是一套基于文本的管理虚拟机的命令。 Virt-manager是一套用 python 编写的虚拟机管理图形界面。 试验机器: CPU支持Intel VT 内存8GB以上 硬盘200GB以上 1.安装CentOS7.6组件 在安装操作系统时,选择Virtualization Host软件中的Virtualization Platform、Compatibilty Libraries、Development Tools、System Administration Tools; 选择GNOME Desktop软件中的GNOME Applications。 2.检查cpu的vmx支持 [root@C76 ~]# cat /proc/cpuinfo | grep vmx flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat

kickstart+virt-install安装虚拟机

自闭症网瘾萝莉.ら 提交于 2020-01-07 06:47:36
本文提供的方法适用于在远程服务器的kvm+qemu环境中部署CentOS虚拟机。 #!/bin/bash set -xe diskimage=/var/lib/libvirt/images/centosvm.qcow2 echo "Creating qcow2 disk image.." qemu-img create -f qcow2 -o preallocation=metadata $diskimage 40G #fallocate -l `ls -al $diskimage | awk '{print $5}'` $diskimage echo `ls -lash $diskimage` # [2] Create a minimal kickstart file for Fedora cat << EOF > fed.ks install text reboot lang en_US.UTF-8 keyboard us network --bootproto dhcp rootpw abc123 firewall --enabled --ssh selinux --enforcing network --bootproto=static --ip=192.168.122.100 --netmask=255.255.255.0 --gateway=192.168.122.1

qemu-native error when building core-image-minimal with yocto

微笑、不失礼 提交于 2020-01-07 03:11:09
问题 I want to build the core-image-minimal with yocto and it fails. To set everything up I use the following steps: sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat cpio python python3 python3-pip python3-pexpect cmake git clone git://git.yoctoproject.org/poky.git poky.git cd poky.git git checkout -b morty remotes/origin/morty . oe-init-build-env cd .. git clone https://github.com/altera-opensource/meta-altera.git meta-altera cd meta-altera

how does qemu-img merge the QCOW2 delta images

狂风中的少年 提交于 2020-01-07 00:36:12
问题 Hello everyone, I am a newcomer. I am learning OpenStack and kvm,but now I met a difficult problem: I have a qcow2 image A, a qcow2 delta image B whose backing file is A, and a qcow2 image C whose backing file is B. Now I want to merge the B and C into a qcow2 image D whose backing file is A. I have tried to use qemu-img to solve it, but still didn't get positive solutions. I hope you can help me, really appreciate. 回答1: With the vm in question currently running use a virsh blockpull. virsh

qemu/kvm

心不动则不痛 提交于 2020-01-06 16:46:45
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> #!/bin/sh qemu-system-x86_64 -enable-kvm -smp 2,cores=2,sockets=1 -m 2048 system.vdi \ -rtc base=localtime -vnc :2 \ -machine usb=on -device usb-tablet \ -netdev user,id=mynet,hostfwd=tcp::10000-:3389 \ -device e1000,netdev=mynet & #-cdrom /home/wen/tmp/cn_visual_studio_2010_professional_x86_dvd_532145.iso \ #-netdev bridge,id=mytap,br=virbr0 \ #-vnc :1 \ #--device e1000,netdev=mytap & #-spice port=9988,password=1234 \ #-netdev tap,id=mytap,ifname=br0,script=no,downscript=no \ #-device rtl8139,netdev=mytap 来源: oschina 链接: https://my.oschina.net/u/3741382

What does the following macro do?

血红的双手。 提交于 2020-01-06 14:47:35
问题 in qemu source code, I have the following macro named offsetof . Can anybody tell me what it does? #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER) It's used in this manner : offsetof(CPUState, icount_decr.u32) where CPUState is a struct. I think it gives the offset of the member inside a struct, but I'm not sure. EDIT:Yeah, I found out what was happening. The definition of CPUState had a macro inside, which I missed, which included the variable icount_decr. 回答1: It gets the

How to GDB step debug a dynamically linked executable in QEMU user mode?

别说谁变了你拦得住时间么 提交于 2020-01-04 06:53:21
问题 For example for ARM, if I compile statically, all works fine: sudo apt-get install gdb-multiarch gcc-arm-linux-gnueabihf qemu-user printf ' #include <stdio.h> #include <stdlib.h> int main() { puts("hello world"); return EXIT_SUCCESS; } ' > hello_world.c arm-linux-gnueabihf-gcc -ggdb3 -static -o hello_world hello_world.c qemu-arm -L /usr/arm-linux-gnueabihf -g 1234 ./hello_world On another terminal: gdb-multiarch -q --nh \ -ex 'set architecture arm' \ -ex 'set sysroot /usr/arm-linux-gnueabihf'

Including foreign shared library when running a binary with qemu

瘦欲@ 提交于 2020-01-04 03:55:06
问题 I have a foreign ARM binary I need to run with Qemu. It relies on an ncurses shared library, libncurses.so.5 . I've tried running qemu-arm -L /usr/arm-linux-gnueabihf/ ./program Which complains that it can't find libncurses.so.5 . I have the correct ncurses shared lib and added it to /usr/arm-linux-gnueabihf/lib/ . The filename is libncurses.so.5 and I have it symlinked to libncurses.so as well but running the program still fails. program: error while loading shared libraries: libncurses.so.5

QEMU: problems with mouse and keyboard settings

若如初见. 提交于 2020-01-03 16:48:21
问题 I'm running Windows 8 in QEMU KVM, and two things make it not very usable. First: mouse is slow (it lags behind movement) and I see the most mouse. That means every time I move, first I see host mouse moving and then guest mouse slowly gets under it. Second: keyboard doesn't handle holding keys well. So let's say I press 'a' for several seconds. Normally I would expect a's to be typed every x miliseconds. In QEMU, only one a is written at start, and only when I release the key, all others are