随笔分类 - nova
摘要：http://kashyapc.com/ Raw image is a blob of data exposed directly in VM as block device, it can't snapshot. qemu-img is able to import data from raw image into qcow2 image, and save it as snapshot Pr...
阅读全文
摘要：KVM Kernel-based Virtual Machine Internals, code and more http://slides.com/braoru/kvm#/ What behind KVM QEMU and KVM architecture overview KVM internals Very small Introduction to Libvirt KVM in 5 s...
阅读全文
摘要：KVM虚拟化技术生态环境介绍 http://xanpeng.github.io/wiki/virt/kvm-virtulization-echosystem-intro.html kvm和qemu/qemu-kvm的关系 qemu vs. qemu-kvm: 从qemu 1.3开始，kvm userspace code就维护在qemu mainline中(git clone https://gi...
阅读全文
摘要：http://www.ilsistemista.net/index.php/virtualization/43-kvm-scalability-and-consolidation-ratio-cache-none-vs-cache-writeback.html?limitstart=0 In the latest ten years, full-virtualization technologie...
阅读全文
摘要：http://www.ilsistemista.net/index.php/virtualization/42-kvm-virtio-paravirtualized-drivers-why-they-matter.html?limitstart=0 As you probably already know, there are basically two different schools in ...
阅读全文
摘要：RHEL6 学习：Write Barriershttp://francs3.blog.163.com/blog/static/405767272012215212890/ Write Barriers 是一种内核机制，可以保证文件系统元数据正确有序地写入持久化存储，哪怕持久化存储掉电的情况也能保证。...
阅读全文
摘要：Barriers, Caches, Filesystemshttp://monolight.cc/2011/06/barriers-caches-filesystems/With the recent proliferation of ext4 as the new “default” Linux ...
阅读全文
摘要：http://lwn.net/Articles/283161/Journaling filesystems come with a big promise: they free system administrators from the need to worry about disk corru...
阅读全文
摘要：Almost one year ago, I checked how different cache settings affected KVM storage subsystem performance. Results were very clear: to obtain good I/O speed, you had to use the write-back or none cache p...
阅读全文
摘要：KVM I/O slowness on RHEL 6 http://www.ilsistemista.net/index.php/virtualization/11-kvm-io-slowness-on-rhel-6.html?limitstart=0 Over one year has passed since my last virtual machine hypervisor compari...
阅读全文
摘要：访问Hard Drive 使用-hda –hdb qemu-system-x86_64 -enable-kvm -name ubuntutest -m 2048 -hda ubuntutest.img -hdb ubuntutest1.img -boot c -vnc :19 -net nic,model=virtio -net tap,ifname=tap0,script=no,downscri...
阅读全文
摘要：Administrating Virtual Machines with QEMU MonitorWhen QEMU is running, a monitor console is provided for performing interaction with the user. Using t...
阅读全文
摘要：安装对虚拟化的支持通常在BIOS中是禁掉的，必须开启才可以。对于Intel CPU，我们可以通过下面的命令查看是否支持虚拟化。# grep "vmx" /proc/cpuinfo flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge...
阅读全文
摘要：QEMU Networking QEMU has a number of really nice ways to set up networking for its guests. It can be a little bewildering to figure out how each of the options work, so I thought I'd write up what I f...
阅读全文
摘要：IPTables for KVM HostJanuary 26, 2012By Andrew GaldesUse the following IPTables rules “/etc/sysconfig/iptables” on a Redhat/CentOS system where this s...
阅读全文
摘要：Firewall and network filtering in libvirtThere are three pieces of libvirt functionality which do network filtering of some type. At a high level they...
阅读全文
摘要：http://cooker.techsnail.com/index.php/XEN,_KVM,_Libvirt_and_IPTablesXEN, KVM, Libvirt and IPTablesAlternate Title: "Libvirt overwrites the existing ip...
阅读全文
摘要：1. nova-api接收到request 在/etc/nova/api-paste.ini中，是这样配置nova v2的 [app:osapi_compute_app_v2] paste.app_factory = nova.api.openstack.compute:APIRouter.factory 在/usr/lib/python2.7/dist-packages/nova/a...
阅读全文
摘要：One of the most important use-case in any cloud is provisioning a VM . In this article we shall do a walk through about an instance(VM) being provisioned in a Openstack based cloud. This article ...
阅读全文
摘要：root@OpenstackIcehouse2:~# cat /etc/nova/nova-compute.conf [DEFAULT] compute_driver=libvirt.LibvirtDriver [libvirt] virt_type=qemu libvirt_inject_partition=-1 inject_password=true ...
阅读全文
