随笔分类 -  nova

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我的虚拟机挂了！怎么把镜像里面的数据找回来？
摘要：创建了一个虚拟机，不知道为什么挂了，重启也启动不了，VNC也登不上去，强行关机后再也启动不起来了，开机一大堆错误，可是里面还有很重要的数据啊，怎么办，怎么办，谁能救救我！ 下面分析几个解救的方法。 方法零：谁让你把重要数据放在系统盘里面了，请使用云盘，也即块存储，虚拟机挂了，盘可以轻松的关联到新的机 阅读全文
posted @ 2018-03-10 00:45 popsuper1982 阅读(3706) 评论(2) 推荐(3) 编辑
QEMU KVM Libvirt(12): Live Migration
摘要：由于KVM的架构为 Libvirt –> qemu –> KVM 所以对于live migration有两种方式，一种是qemu + KVM自己的方式，一种是libvirt的方式，当然libvirt也是基于qemu+kvm的方式 qemu + KVM自己的方式为使用monitor KVM Migration KVM currently supports savevm/loadvm and offl... 阅读全文
posted @ 2014-07-17 19:52 popsuper1982 阅读(4711) 评论(0) 推荐(0) 编辑
QEMU KVM Libvirt手册(11): Managing Storage
摘要：When managing a VM Guest on the VM Host Server itself, it is possible to access the complete file system of the VM Host Server in order to attach or create virtual hard disks or to attach existing ima... 阅读全文
posted @ 2014-07-16 15:58 popsuper1982 阅读(2121) 评论(0) 推荐(0) 编辑
Provisioning KVM virtual machines on iSCSI the hard way
摘要：https://www.berrange.com/posts/2010/05/05/provisioning-kvm-virtual-machines-on-iscsi-the-hard-way-part-1-of-2/The previous articles showed how to prov... 阅读全文
posted @ 2014-07-15 19:21 popsuper1982 阅读(857) 评论(0) 推荐(0) 编辑
Virtio
摘要：VirtioSo-called "full virtualization" is a nice feature because it allows you to run any operating system virtualized. However, it's slow because the ... 阅读全文
posted @ 2014-07-15 19:17 popsuper1982 阅读(894) 评论(0) 推荐(0) 编辑
Setting up libvirt for TLS (Encryption & Authentication)
摘要：Setting up libvirt for TLS (Encryption & Authentication)Setting up your virtualisation infrastructure for Transport Layer Security (TLS) isn't very di... 阅读全文
posted @ 2014-07-15 19:16 popsuper1982 阅读(1425) 评论(0) 推荐(0) 编辑
Running your own dnsmasq with libvirtd
摘要：Running your own dnsmasq with libvirtdOn linux host servers, libvirtd uses dnsmasq to service the virtual networks, such as the default network. A new... 阅读全文
posted @ 2014-07-15 19:02 popsuper1982 阅读(424) 评论(0) 推荐(0) 编辑
libvirt & network filtering iptables/ebtables
摘要：[libvirt] FYI: a short guide to libvirt & network filtering iptables/ebtables use Firewall / network filtering in libvirt ===============... 阅读全文
posted @ 2014-07-15 19:01 popsuper1982 阅读(754) 评论(0) 推荐(0) 编辑
Virtual Networking
摘要：How the virtual networks used by guests workNetworking using libvirt is generally fairly simple, and in this section you'll learn the concepts you nee... 阅读全文
posted @ 2014-07-15 18:59 popsuper1982 阅读(1017) 评论(0) 推荐(0) 编辑
Guest CPU model configuration in libvirt with QEMU/KVM
摘要：Many of the management problems in virtualization are caused by the annoyingly popular & desirable host migration feature! I previously talked about P... 阅读全文
posted @ 2014-07-15 18:47 popsuper1982 阅读(1301) 评论(0) 推荐(0) 编辑
Virtual Machine Lifecycle
摘要：Virtual Machine LifecycleThis page describes the basics of the virtual machine lifecycle. Its aim is to provide fundamental information to create, run... 阅读全文
posted @ 2014-07-15 17:17 popsuper1982 阅读(333) 评论(0) 推荐(0) 编辑
QEMU KVM Libvirt手册(10):Managing Virtual Machines with libvirt
摘要：libvirt is a library that provides a common API for managing popular virtualization solutions, among them KVM and Xen. 使用virt-install创建image qemu-img create -f qcow2 /tmp/centos5.8.img 10G virt-insta... 阅读全文
posted @ 2014-07-15 17:07 popsuper1982 阅读(2088) 评论(0) 推荐(0) 编辑
How To Setup a CA
摘要：How To Setup a CAOriginal Version by Ian AldermanUpdated by Zach MillerIntroductionYou can set up a Certificate Authority (CA) in multiple different w... 阅读全文
posted @ 2014-07-14 22:17 popsuper1982 阅读(912) 评论(0) 推荐(0) 编辑
QEMU KVM Libvirt手册(10): KVM的各种限制
摘要：Overcommits KVM allows for both memory and disk space overcommit. However, hard errors resulting from exceeding available resources will result in guest failures. CPU overcommit is also supported bu... 阅读全文
posted @ 2014-07-14 11:36 popsuper1982 阅读(957) 评论(0) 推荐(0) 编辑
QEMU KVM Libvirt手册(9): network
摘要：虚拟网卡由-net nic定义 # qemu-system-x86_64 -enable-kvm -name ubuntutest -m 2048 -hda ubuntutest.img -vnc :19 -net nic 如果我们在monitor中查看info network 可以看到下面的 有时候，我们看到的是VLAN 0，这里的VLAN和802.1.q一点关系都没有，就是virtual ... 阅读全文
posted @ 2014-07-13 23:11 popsuper1982 阅读(2403) 评论(0) 推荐(0) 编辑
QEMU KVM Libvirt手册(8): 半虚拟化设备virtio
摘要：KVM本身并不提供半虚拟化功能，是通过virtio来实现的 The benefits of virtio drivers are of lower overhead and higher performance. Memory Ballooning (virtio_balloon) memory ballooning可以动态调整guest的内存的大小 如果有-m参数，则向更大的内存调整时无效的，... 阅读全文
posted @ 2014-07-13 00:03 popsuper1982 阅读(2094) 评论(0) 推荐(0) 编辑
QEMU KVM Libvirt手册(7): 硬件虚拟化
摘要：在openstack中，如果我们启动一个虚拟机，我们会看到非常复杂的参数 qemu-system-x86_64 -enable-kvm -name instance-00000024 -S -machine pc-i440fx-trusty,accel=kvm,usb=off -cpu SandyBridge,+erms,+smep,+fsgsbase,+pdpe1gb,+rdrand,+f16c... 阅读全文
posted @ 2014-07-12 19:32 popsuper1982 阅读(11450) 评论(0) 推荐(0) 编辑
Linux virtualization and PCI passthrough
摘要：Processors have evolved to improve performance for virtualized environments, but what about I/O aspects? Discover one such I/O performance enhancement... 阅读全文
posted @ 2014-07-11 15:26 popsuper1982 阅读(838) 评论(0) 推荐(0) 编辑
Anatomy of the libvirt virtualization library
摘要：The libvirt library is a Linux API over the virtualization capabilities of Linux that supports a variety of hypervisors, including Xen and KVM, as wel... 阅读全文
posted @ 2014-07-11 15:11 popsuper1982 阅读(485) 评论(0) 推荐(0) 编辑
Virtio: An I/O virtualization framework for Linux
摘要：The Linux kernel supports a variety of virtualization schemes, and that's likely to grow as virtualization advances and new schemes are discovered (fo... 阅读全文
posted @ 2014-07-11 15:01 popsuper1982 阅读(1247) 评论(0) 推荐(0) 编辑

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