动手构建云计算(2)--xen 的安装使用 (在slc5.5 上）
slc5.5是cern基于scientific linux 和 rhel5X开发的。在lxc002，lxc003上安装xen作为虚拟机的hypervisor
1.安装xen：
yum install xen
yum install virt-manager
yum install virt-viewer #编辑grub，设置default=0
vi /boot/grub/menu.lst
reboot
#重启后查看内核，应该是2.6.*xen
uname -a
2.安装虚拟机
#创建虚拟机文件
dd if=/dev/zero of=/vm/vm-slc6x.img bs=1 count=1 seek=15G#通过http方式安装slc6操作系统
virt-install --paravirt --name=vm-slc6x --ram=4096 --vcpus=1 --file=/vm/vm-slc6x.img -l http://mirror.****.ac.cn/slc/slc6X/i386
3. 管理虚拟机
Common 'xm' commands:
console Attach to 's console.
create Create a domain based on .
destroy Terminate a domain immediately.
dump-core Dump core for a specific domain.
help Display this message.
list List information about all/some domains.
mem-set Set the current memory usage for a domain.
migrate Migrate a domain to another machine.
pause Pause execution of a domain.
reboot Reboot a domain.
restore Restore a domain from a saved state.
save Save a domain state to restore later.
shutdown Shutdown a domain.
trigger Send a trigger to a domain.
top Monitor a host and the domains in real time.
unpause Unpause a paused domain.
uptime Print uptime for a domain.
vcpu-set Set the number of active VCPUs for allowed for the domain.
#xm list 查看虚拟机
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 7035 16 r----- 1229.6
vm-slc6x 7 4096 1 -b---- 13.6 #xm console vm-slc6x 登陆虚拟机
#xm shutdown vm-slc6x 关闭虚拟机
#xm create vm-slc6x 启动虚拟机
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