xen杂记
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一、Xen基础
0、杂项
0.1 调大CPU和内存配置、开启虚拟化功能
0.2 创建xen镜像源
[[email protected] ~]# uname -r
2.6.32-504.el6.x86_64
[[email protected] ~]# free -m
total used free shared buffers cached
Mem: 3824 162 3662 0 14 50
-/+ buffers/cache: 97 3727
Swap: 4095 0 4095
[[email protected] ~]#
[[email protected] yum.repos.d]# vim local6.repo
[ali-Xen]
name=Xen
baseurl=http://mirrors.aliyun.com/centos/6/virt/x86_64/xen/
enabled=1
gpgcheck=0
更新镜像仓库：
[[email protected] ~]# yum repolist1、安装配置Xen
1.1 安装Xen
[[email protected] ~]# yum install xen1.1 修改内核文件
[[email protected] ~]# vim /etc/grub.conf
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (4.9.75-30.el6.x86_64)
root (hd0,0)
kernel /xen.gz dom0_mem=1024M cpufreq=xen dom0_max_vcpus=1 dom0_vcpus_pin
module /vmlinuz-4.9.75-30.el6.x86_64 ro root=UUID=01c53735-f7c4-4294-a944-e69df17ab9cd rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
module /initramfs-4.9.75-30.el6.x86_64.img1.2 重启
# shutdown -r now1.3 查看系统信息
[[email protected] ~]# uname -r
4.9.75-30.el6.x86_641.3.1 查看运行的虚拟机
这个时候原来的虚拟机已经变成Dom0 虚拟机
[[email protected] ~]# xl list
Name ID Mem VCPUs State Time(s)
Domain-0 0 1024 1 r----- 69.6
[[email protected] ~]# 2、xend
2.1 开启xend服务
[[email protected] ~]# service xend start
Starting xend daemon: [ OK ]
[[email protected] ~]# xm list
WARNING: xend/xm is deprecated.
Name ID Mem VCPUs State Time(s)
Domain-0 0 1024 1 r----- 102.4
[[email protected] ~]#
下面使用xl，关闭xend
[[email protected] ~]# service xend stop3、xl
3.1 查看帮助
[[email protected] ~]# xl helpxl使用配置文件，启动DomU常用的指令说明
man xl.cfg
xl命令自己的通用所有配置参数
man xl.conf
4、创建虚拟机
4.1 创建磁盘文件
[[email protected] ~]# mkdir -pv /images/xen
[[email protected] ~]# qemu-img create -f raw -o size=4G /images/xen/busybox.img
Formatting ‘/images/xen/busybox.img‘, fmt=raw size=4294967296
[[email protected] ~]# ll /images/xen/busybox.img
-rw-r--r-- 1 root root 4294967296 Sep 11 07:51 /images/xen/busybox.img
[[email protected] xen]# du -sh busybox.img
0 busybox.img
另外一种创建方法：
[[email protected] xen]# rm -r busybox.img
rm: remove regular file `busybox.img‘? y
[[email protected] xen]#
[[email protected] xen]# qemu-img create -f raw /images/xen/busybox.img 4G
Formatting ‘/images/xen/busybox.img‘, fmt=raw size=4294967296
[[email protected] xen]# ll
total 0
-rw-r--r-- 1 root root 4294967296 Sep 11 07:56 busybox.img
格式化磁盘文件：
[[email protected] xen]# mke2fs -t ext2 busybox.img
[[email protected] xen]# du -sh busybox.img
66M busybox.img
挂载文件（本地回环设备）：
[[email protected] xen]# mount -o loop busybox.img /mnt/4.2 安装开发环境、编译busybox
[[email protected] ~]# yum -y groupinstall "Development Tools" "Server Platform Development"
上传busybox文件：
[[email protected] ~]# ll busybox-1.22.1.tar.bz2
-rw-r--r-- 1 root root 2218650 Sep 11 08:08 busybox-1.22.1.tar.bz2
展开压缩包：
[[email protected] ~]# tar xf busybox-1.22.1.tar.bz2
[[email protected] ~]# cd busybox-1.22.1
为了把busybox编译成静态文件，需要安装一个包：
[[email protected] ~]# yum install glibc-static
编译busybox:
[[email protected] busybox-1.22.1]# make menuconfig配置：
安装:
[[email protected] busybox-1.22.1]# make
[[email protected] busybox-1.22.1]# make install
查看安装后的文件：
[[email protected] busybox-1.22.1]# ll _install/
total 12
drwxr-xr-x 2 root root 4096 Sep 11 08:39 bin
lrwxrwxrwx 1 root root 11 Sep 11 08:39 linuxrc -> bin/busybox
drwxr-xr-x 2 root root 4096 Sep 11 08:40 sbin
drwxr-xr-x 4 root root 4096 Sep 11 08:40 usr
[[email protected] busybox-1.22.1]#
拷贝文件：
[[email protected] busybox-1.22.1]# cp -a _install/* /mnt/4.3 创建其他系统目录（/mnt现在是根文件系统）
[[email protected] mnt]# mkdir proc sys dev etc var boot home
测试访问：
[[email protected] ~]# chroot /mnt /bin/sh
/ #
/ # ls
bin dev home lost+found sbin usr
boot etc linuxrc proc sys var4.4 拷贝内核和ramdisk
创建软链接：
[[email protected] boot]# ln -sv vmlinuz-2.6.32-504.el6.x86_64 vmlinuz
`vmlinuz‘ -> `vmlinuz-2.6.32-504.el6.x86_64‘
[[email protected] boot]# ll vmlinuz
lrwxrwxrwx 1 root root 29 Sep 11 08:52 vmlinuz -> vmlinuz-2.6.32-504.el6.x86_64
[[email protected] boot]# ln -sv initramfs-2.6.32-504.el6.x86_64.img initramfs.img
`initramfs.img‘ -> `initramfs-2.6.32-504.el6.x86_64.img‘
[[email protected] boot]# ll initramfs.img
lrwxrwxrwx 1 root root 35 Sep 11 08:53 initramfs.img -> initramfs-2.6.32-504.el6.x86_64.img4.5 创建xl配置文件（PV模式可以使用Dom0配置文件）
[[email protected] xen]# cp xlexample.pvlinux busybox
[[email protected] xen]# vim busybox
name = "busybox-001"
kernel = "/boot/vmlinuz"
ramdisk = "/boot/initramfs.img"
extra = "selinux=0 init=/bin/sh"
#暂时关闭网卡
#vif = [ ‘‘ ]
memory = 256
vcpus = 1
disk = [ ‘/images/xen/busybox.img,raw,xvda,rw‘ ]
root = "/dev/xvda ro"4.6 启动虚拟机
空跑测试，不真正运行：
[[email protected] xen]# xl -v create busybox -n
创建虚拟机：
[[email protected] xen]# xl -v create busybox
查看状态：
[[email protected] xen]# xl list
Name ID Mem VCPUs State Time(s)
Domain-0 0 1024 1 r----- 523.0
busyboy-001 1 512 1 -b---- 2.04.7 连接创建的虚拟机
连接：
[[email protected] xen]# xl console busyboy-001
/ # ls
bin dev home lost+found sbin usr
boot etc linuxrc proc sys var
/ # free -m
total used free shared buffers
Mem: 489 27 461 0 0
-/+ buffers: 27 461
Swap: 0 0 0退出不能用【exit】，会拆除虚拟机的。要用Ctrl+]
取出配置，去除空白行：
[[email protected] xen]# grep -v "^#" busybox | grep -v "^$"
name = "busybox-001"
kernel = "/boot/vmlinuz"
ramdisk = "/boot/initramfs.img"
extra = "selinux=0 init=/bin/sh"
memory = 512
vcpus = 1
disk = [ ‘/images/xen/busybox.img,raw,xvda,rw‘ ]
root = "/dev/xvda ro"
关电（删除）虚拟机：
[[email protected] xen]# xl destroy busybox-001
DEBUG libxl__device_destroy_tapdisk 105 type=aio:/images/xen/busybox.img disk=:/images/xen/busybox.img
创建虚拟机后立即连接控制台：
[[email protected] xen]# xl create /etc/xen/busybox -c
/ # ls
bin dev home lost+found sbin usr
boot etc linuxrc proc sys var
Ctrl+] 退出控制台4.8 Dom0创建桥接口
记得先关闭NetworkManager开机启动
[[email protected] ~]# chkconfig --list NetworkManager
# chkconfig --level 3 NetworkManager off
# service NetworkManager stop
[[email protected] network-scripts]# cp ifcfg-eth0 ifcfg-xenbr0
[[email protected] network-scripts]# vim ifcfg-eth0
DEVICE=eth0
HWADDR=00:0C:29:5D:1B:80
TYPE=Ethernet
UUID=528d943c-4ffa-4974-a107-c5a1deabafb5
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO="none"
BRIDGE=”xenbr0“
[[email protected] network-scripts]# vim ifcfg-xenbr0
DEVICE="xenbr0"
TYPE="Bridge"
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO="static"
IPADDR=10.201.106.21
NETMASK=255.255.255.0
GATEWAY=10.201.106.2
DNS1=10.201.106.2
重启网络服务：
[[email protected] network-scripts]# service network restart
[[email protected] ~]# ifconfig | more
eth0 Link encap:Ethernet HWaddr 00:0C:29:5D:1B:80
inet6 addr: fe80::20c:29ff:fe5d:1b80/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:82593 errors:0 dropped:0 overruns:0 frame:0
TX packets:22191 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:97975403 (93.4 MiB) TX bytes:2425845 (2.3 MiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
xenbr0 Link encap:Ethernet HWaddr 00:0C:29:5D:1B:80
inet addr:10.201.106.21 Bcast:10.201.106.255 Mask:255.255.255.0
[[email protected] xen]# brctl stp xenbr0 on
[[email protected] xen]# brctl show
bridge name bridge id STP enabled interfaces
xenbr0 8000.000c295d1b80 yes eth0
[[email protected] xen]# 以上是关于xen杂记的主要内容，如果未能解决你的问题，请参考以下文章