安装XEN

1.安装XEN

yum -y install xen*
yum -y install kernel-xen*

2.验证安装

#ls -lh /boot

-rw-r--r-- 1 root root 2.1M 06-01 02:33 vmlinuz-2.6.18-238.12.1.el5xen
-rw-r--r-- 1 root root 412K 06-01 01:15 xen.gz-2.6.18-238.12.1.el5
-rwxr-xr-x 1 root root 956K 06-01 03:27 xen-syms-2.6.18-238.12.1.el5

3.检查grub配置

#cat /boot/grub/grub.conf

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You do not have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /, eg.
#          root (hd0,0)
#          kernel /boot/vmlinuz-version ro root=/dev/sda1
#          initrd /boot/initrd-version.img
#boot=/dev/sda
default=1
timeout=5
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-238.12.1.el5xen)
        root (hd0,0)
        kernel /boot/xen.gz-2.6.18-238.12.1.el5
        module /boot/vmlinuz-2.6.18-238.12.1.el5xen ro root=LABEL=/
        module /boot/initrd-2.6.18-238.12.1.el5xen.img
title CentOS (2.6.18-164.el5)
        root (hd0,0)
        kernel /boot/vmlinuz-2.6.18-164.el5 ro root=LABEL=/
        initrd /boot/initrd-2.6.18-164.el5.img
修改其中的default=1为default=0，启用xen内核

4、检查XEN是否正常
重新启动计算机
1）执行

# xm list

Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0     7531     4 r-----     17.5
出现上述结果表示xen启动正常

2）检查log

#ls -lh /var/log/xen

drwx------ 2 root root 4.0K 05-10 05:30 console
-rw-r--r-- 1 root root   36 06-25 01:20 xend-debug.log
-rw-r--r-- 1 root root 2.0K 06-25 01:20 xend.log
# cat /var/log/xen/xend-debug.log
Nothing to flush.
Nothing to flush.
表示一切正常，我们的CentOS5中的XEN服务已经成功启动。
至此，我们的CentOS5的宿主机已经安装就绪。