參考文章:NetBSD/Xen Howto.詳細http://www.netbsd.org/Ports/xen/howto.html
一.磁盤分區介紹(以FreeBSD命令):
ad0s1 128MB FAT32 # Grub ad0s2 20GB UFS2 # FreeBSD ad0s3 18GB FFSv2 # NetBSD
二.構建Xen-Based系統(Domain0)
假設NetBSD 3.0已安裝,並同步了pkgsrc及src.
1.安裝Grub
# cd /usr/pkgsrc/sysutils/grub # make install clean clean-depends
2.把Grub安裝到第一個分區,使用Grub引導NetBSD及NetBSD/Xen.
3.安裝xentools20
# cd /usr/pkgsrc/sysutils/xentools20 # make install clean clean-depends
4.安裝Xen 2.0內核
# cd /usr/pkgsrc/sysutils/xenkernel20 # make install clean clean-depends
復制Xen 2.0內核到/目錄下:
# cp /usr/pkg/xen-kernel/xen.gz /
5.編譯NetBSD/Xen內核,並復制成為/netbsd-XEN0
# cd /usr/src/sys/arch/i386/conf # config XEN0 # cd ../compile/XEN0 # make depend # make # cp netbsd /netbsd-XEN0注:如果想在dom0系統中運行PF,請先行編輯內核配置文件,打開相應的選項.
6.掛上MSDOS分區,修改Grub啟動列表.最後menu.lst如下:
default 0 timeout 10 title FreeBSD 6.0 rootnoverify (hd0,1,a) chainloader +1 title NetBSD 3.0 rootnoverify (hd0,2,a) chainloader +1 title NetBSD/Xen root (hd0,2) kernel (hd0,2,a)/xen.gz dom0_mem=262144 module (hd0,2,a)/netbsd-XEN0 root=/dev/hda1 ro console=tty0
dom0_mem=262144代表了domain0的系統內存為256MB,module (hd0,2,a)/netbsd-XEN0就是NetBSD/Xen內核.
7.重啟系統,並選擇"NetBSD/Xen"進入系統.
# uname -a NetBSD NetBSD.congli 3.0.0_STABLE NetBSD 3.0.0_STABLE (XEN0) #0: Tue Feb 21 03:33:30 UTC 2006 [email protected]:/home/builds/ab/netbsd-3-0/i386/\ 200602200000Z-obj/home/builds/ab/netbsd-3-0/src/sys/arch/i386/compile/XEN0 i386
8.啟動Xen工具守護進程(/usr/pkg/share/examples/rc.d/xend)
# echo 'xend=YES' >> /etc/rc.conf # cd /dev && sh MAKEDEV xen # /usr/pkg/share/examples/rc.d/xend start
檢查是否成功
# xm list Name Id Mem(MB) CPU State Time(s) Console Domain-0 0 256 0 r---- 58.1
到此,已經成功構建並運行在Xen-Based系統(Domain0)中.
三.安裝DomainU
1.編譯及安裝XENU內核(/netbsd-XENU)
# cd /usr/src/sys/arch/i386/conf # config XENU # cd ../compile/XENU # make depends # make # cp netbsd /netbsd-XENU0
2.編譯及安裝INSTALL_XENU內核(/netbsd-INSTALL_XENU)
# cd /usr/src/sys/arch/i386/conf # config INSTALL_XENU # cd ../compile/INSTALL_XENU # make depends # make # cp netbsd /netbsd-INSTALL_XENU
注:不知道是什麼原因,自己編譯的netbsd-INSTALL_XENU在安裝時出下面錯誤而不能安裝,
但從NetBSD網站上下載的netbsd-INSTALL_XENU卻能夠安裝.下載地址:
ftp://ftp.netbsd.org/pub/NetBSD-daily/netbsd-3-0/200602200000Z/i386/binary/kernel.
其實在這裡可以下載上文所提到的三個內核文件,包括netbsd-XEN0,netbsd-INSTALL_XENU,netbsd-XENU.
錯誤信息,提示不能掛載/設備:
xbd: using event channel 5 xbd0 at hypervisor0: Xen Virtual Block Device 2048 MB boot device: xbd0 root on md0a dumps on md0b no file system for md0 (dev 0x1100) cannot mount root, error = 79 root device (default md0a):
3.建立磁盤映象文件,如果直接安裝到硬盤的一個分區上則可以跳過這一步.
# mkdir /home/xen # cd /home/xen # dd if=/dev/zero of=nbsd.img bs=1024k count=2048
建立一個2GB大小的文件.並把NetBSD 3.0的安裝ISO(i386cd.iso)文件復制到/home/xen下面.
4.使用xm工具創建DomainU,xm可以直接指定參數,或從配置文件讀取,詳細看幫忙
# xm help CMD (如:xm help create)
下面是一個簡單的配置文件(/home/xen/nbsd):
# -*- mode: python; -*- #============================================================== # Python defaults setup for 'xm create'. # Edit this file to reflect the configuration of your system. #============================================================== #-------------------------------------------------------------- # Kernel image file. This kernel will be loaded in the new domain. # DomainU運行時所需要的內核文件 kernel = "/netbsd-XENU" # DomainU安裝時所需的內核文件 #kernel = "/netbsd-INSTALL_XENU" # Memory allocation (in megabytes) for the new domain. memory = 512 # A handy name for your new domain. This will appear in 'xm list', # and you can use this as parameters for xm in place of the domain # number. All domains must have different names. # name = "nbsd" # Which CPU to start domain on (only relevant for SMP hardware). CPUs # numbered starting from ``0''. # cpu = -1 # leave to Xen to pick #-------------------------------------------------------------- # Define network interfaces for the new domain. # Number of network interfaces (must be at least 1). Default is 1. nics = 1 # Define MAC and/or bridge for the network interfaces. # # The MAC address specified in ``mac'' is the one used for the interface # in the new domain. The interface in domain0 will use this address XOR'd # with 00:00:00:01:00:00 (i.e. aa:00:00:51:02:f0 in our example). Random # MACs are assigned if not given. # # ``bridge'' is a required parameter, which will be passed to the # vif-script called by xend(8) when a new domain is created to configure # the new xvif interface in domain0. # # In this example, the xvif is added to bridge0, which should have been # set up prior to the new domain being created -- either in the # ``network'' script or using a /etc/ifconfig.bridge0 file. # vif = [ 'mac=aa:00:00:50:02:f0, bridge=bridge0' ] #-------------------------------------------------------------- # Define the disk devices you want the domain to have access to, and # what you want them accessible as. # # Each disk entry is of the form: # # phy:DEV,VDEV,MODE # # where DEV is the device, VDEV is the device name the domain will see, # and MODE is r for read-only, w for read-write. You can also create # file-backed domains using disk entries of the form: # # file:PATH,VDEV,MODE # # where PATH is the path to the file used as the virtual disk, and VDEV # and MODE have the same meaning as for ``phy'' devices. # # VDEV doesn't really matter for a NetBSD guest OS, but it does for Linux. # Worse, the device has to exists in /dev/ of domain0, because xm will # try to stat() it. This means that in order to load a Linux guest OS # from a NetBSD domain0, you'll have to create /dev/hda1, /dev/hda2, ... # on domain0, with the major/minor from Linux :( #disk = [ 'phy:/dev/wd0e,wd0d,w' ] disk = [ 'file:/home/xen/i386cd.iso,cd0a,r', 'file:/home/xen/nbsd.img,wd0d,w' ] #-------------------------------------------------------------- # Set the kernel command line for the new domain. # Set root device. This one does matter for NetBSD root = "/dev/wd0d" # extra parameters passed to the kernel #extra = "" #-------------------------------------------------------------- # Set according to whether you want the domain restarted when it exits. # The default is False. #autorestart = True # end of nbsd config file ====================================================
因為現在是安裝DomainU階段,所以需要把配置文件(/home/xen/nbsd)改一下:
#kernel = "/netbsd-XENU" kernel = "/netbsd-INSTALL_XENU"
安裝DomainU:
# xm create /home/xen/nbsd -c
接下來就跟正常安裝NetBSD 3.0沒有多大區別.安裝完之後,需要halt,再改一下配置文件(/home/xen/nbsd),使用netbsd-XENU來啟動domainU:
kernel = "/netbsd-XENU" #kernel = "/netbsd-INSTALL_XENU"
最後運行 xm list,
Name Id Mem(MB) CPU State Time(s) Console Domain-0 0 256 0 r---- 1569.6 nbsd 4 511 0 -b--- 0.2 9604
四.DomainU的網絡設置
當domU啟動時,會在dom0系統中創建一個虛擬網絡接口(vxif？.？),該虛擬接口跟domU系統的網絡接口(xennet？)橋接,只需要把vxif？.？及xennet？設置同一網段,domU的網關指向vxif？.？,然後在dom0系統中做NAT.這樣domU就可以訪問外網.
