NFS shared storage live migration to achieve KVM-based virtual machine
A: configuration environment
II: related to the installation dependencies
Three: to achieve NFS shared storage
Four: KVM machine configuration same procedure
Five: Installation KVM01 install the virtual machine
Six: realization of migration
Initial test configuration: all hosts turn off the firewall and selinux
[root@localhost ~]# iptables -F
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# systemctl disable firewalld
[root@localhost ~]# setenforce 0
[root@localhost ~]# sed -i '/SELINUX/ s/enforcing/disabled/g' /etc/sysconfig/selinux
NFS shared storage live migration to achieve KVM-based virtual hosting
Running virtual machines can be migrated from one KVM KVM KVM host to another host running without any downtime. If both KVM hosts can access the same storage pool, then the live migration work fine. To make the storage pool can be accessed on the KVM host, you need to use NFS or GFS2 file system (cluster file system). In this example, I use the NFS file system to store the VM image file. During the migration, VM "Memory" contents will be copied to the target KVM host, but at some point in time, the VM migration occurs. Note that when you share a file system on a KVM host, will not be VM disk image transmission over the network, since both KVM hosts can access the same storage pool.
Introduction Migration: Migration is running on a KVM virtual machine system that will run on KVM transferred to other physical machines
Static Migration: Migration in the case of virtual machines authorities
Dynamic Migration: Migrating the case of normal service running on a virtual machine, to be based on shared storage
Live migration features:
It will not cause significant impact on end users
Only a very short downtime
Live migration topology
lab environment:
KVM01 192,168,200.10
KVM02 192,168,200.11
NFS 192.168.200.12
1, a three server hostname, the configuration / etc / hosts to ensure network connection
2, KVM connected to two hosts 'the NFS shared storage'
3, the KVM new source host and the virtual machine system is mounted
4, connected to KVM, and migration
Live migration demonstration
Source host KVM01 192.168.200.10
The destination host KVM02 192.168.200.11
NFS Share 192.168.200.12 shared storage / kvm-share
KVM01 and KVM02 KVM hosts are required to install the software and adjust the network mode, be sure to close all server iptables and selinux.
VMware virtual machine linux boot before the need to check the Inter VT-x / EPT or AMD / RVI (v)
A: configuration environment
[root@localhost ~]#hostname KVM01
[root@localhost ~]#bash
[root@localhost ~]#hostname KVM02
[root@localhost ~]#bash
[root@localhost ~]#hostname NFS
[root@localhost ~]#bash
[root@KVM01 ~]# cat /proc/cpuinfo | grep vmx #查看是否支持虚拟化功能
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon nopl xtopology tsc_reliable nonstop_tsc eagerfpu pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch ssbd ibrs ibpb stibp tpr_shadow vnmi ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid mpx rdseed adx smap clflushopt xsaveopt xsavec arat spec_ctrl intel_stibp flush_l1d arch_capabilities
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon nopl xtopology tsc_reliable nonstop_tsc eagerfpu pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch ssbd ibrs ibpb stibp tpr_shadow vnmi ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid mpx rdseed adx smap clflushopt xsaveopt xsavec arat spec_ctrl intel_stibp flush_l1d arch_capabilities
[Root @ KVM01 ~] # vim / etc / hosts # edit the hosts file
192168200111 KVM01
192168200112 KVM02
192.168.200.113 NFS
[root@KVM01 ~]# scp /etc/hosts 192.168.200.11:/etc
[root@KVM01 ~]# scp /etc/hosts 192.168.200.12:/etc
II: Installation dependent packages
Two KVM need to install dependencies
CD image CentOS7 system, a KVM has been provided to install the required software, by deploying a local disc image source yum, yum mounted directly to the required software.
[Root @ KVM01 ~] # yum -y groupinstall "GNOME Desktop" # install the GNOME desktop environment
[Root @ KVM01 ~] # yum -y install qemu-kvm #KVM module
[Root @ KVM01 ~] # yum -y install qemu-kvm-tools #KVM debugging tool, not installed
[Root @ KVM01 ~] # yum -y install qemu-img #qemu components, creating a disk, start the virtual machine
[Root @ KVM01 ~] # yum -y install bridge-utils # network support tools
[Root @ KVM01 ~] # yum -y install libvirt # VM management tools
[Root @ KVM01 ~] # yum -y install virt-manage0r # graphical interface to manage virtual machines
[root@KVM01 ~]# yum -y install qemu-kvm qemu-kvm-tools virt-install qemu-img bridge-utils libvirt virt-manager
Detecting whether the KVM module is installed successfully
[Root @ KVM01 ~] # lsmod | grip sq.m.
kvm_intel 174841 0
sqm 578518 1 kvm_intel
irqbypass 13503 1 sq.m
Note: Use yum after you install the desktop, the system default run target revised to graphical.target. After rebooting the system into a graphical interface, if not modify the system's default run target, errors may occur when restarted.
Open the service, after installation also need to open libvirtd Service
[root@KVM01 ~]# systemctl start libvirtd
[root@KVM01 ~]# systemctl enable libvirtd
Three: to achieve shared NFS storage
NFS SERVER: Configure a shared directory / kvm-share
[root@NFS ~]# cat /etc/exports
[root@NFS ~]# mkdir /kvm-share
[root@NFS ~]# systemctl start nfs
KVM operation on both hosts:
View shared success
[Root @ KVM01 ~] # showmount -e 192,168,200,113
Export list for 192.168.200.113:
/ Sq-share 192.168.200.112,192.168.200.111
[Root @ KVM02 ~] # showmount -e 192,168,200,113
Export list for 192.168.200.113:
/ Sq-share 192.168.200.112,192.168.200.111
Four: KVM machine configuration same procedure
Click QEMU / KVM
The image transmitted by the xftp / virtual / IOS
Create a shared storage pool
Create a shared storage volume in kvm-share in
Five: KVM01 install the virtual machine
KVM01: 192.168.200.10 create virtual machines on shared storage
New Virtual Machine
go ahead
Select your uploaded image
Memory can be adjusted according to their needs little major
Select the shared storage pool created yourself
Click to select the storage volume management have created yourself
Define your own configuration settings before installing
If the network configuration options before the bridge done BRIDGE
I did not do, so I chose NET mode
Set the host boot, there needs to be selected in your own image, because sometimes automatically deselected
Click to start the installation, with the installation of Linux behind the same is not elaborated here
Six: realization of migration
KVM migration: Open virt-manager to select the file select Add Connection
Source host connection destination host
If you encounter the following error need to install openssh-askpass
[root@KVM01 ~]# yum -y install openssh-askpass
[root@KVM02 ~]# yum -y install openssh-askpass
输入密码
连接到会有新的一个QEMU/KVM后面有自己的ip
尝试迁移
有相同的报错做如下操作
[root@KVM01 ~]# virsh shutdown centos7.0
域 centos7.0 被关闭
[root@KVM01 ~]# virsh edit centos7.0
<driver name='qemu' type='raw' cache='none'/>
[root@KVM01 ~]# virsh start centos7.0
域 centos7.0 已开始
[root@KVM01 ~]# virsh list --all
Id 名称 状态
----------------------------------------------------
2 centos7.0 running
这样就可以迁移成功了
