學習NetBSD-體驗Xen 2.0(轉)[@more@]

　　參考文章:NetBSD/Xen Howto.詳細

　　一.磁碟分割槽介紹(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安裝到第一個分割槽,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核心

　　# cd /usr/pkgsrc/sysutils/xenkernel20

# make install clean clean-depends

　　複製Xen 2.0核心到/目錄下:

　　# cp /usr/pkg/xen-kernel/xen.gz /

　　5.編譯NetBSD/Xen核心,並複製成為/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系統中執行PF,請先行編輯核心配置檔案,開啟相應的選項.

　　6.掛上MSDOS分割槽,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的系統記憶體為256MB,module (hd0,2,a)/netbsd-XEN0就是NetBSD/Xen核心.

　　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　builds@works.netbsd.org:/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工具守護程式(/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,已經成功構建並執行在Xen-Based系統(Domain0)中.

　　三.安裝DomainU

　　1.編譯及安裝XENU核心(/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核心(/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核心檔案,包括netbsd-XEN0,netbsd-INSTALL_XENU,netbsd-XENU.

　　錯誤資訊,提示不能掛載/裝置:

　　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.建立磁碟映象檔案,如果直接安裝到硬碟的一個分割槽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大小的檔案.並把NetBSD 3.0的安裝ISO(i386cd.iso)檔案複製到/home/xen下面.

　　4.使用xm工具建立DomainU,xm可以直接指定引數,或從配置檔案讀取,詳細看幫忙

　　# xm help CMD (如:xm help create)　

　　下面是一個簡單的配置檔案(/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執行時所需要的核心檔案
kernel = "/netbsd-XENU"
# DomainU安裝時所需的核心檔案
#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,所以需要把配置檔案(/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,再改一下配置檔案(/home/xen/nbsd),使用netbsd-XENU來啟動domainU:

　　kernel = "/netbsd-XENU"

#kernel = "/netbsd-INSTALL_XENU"

　　最後執行 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的網路設定

　　當domU啟動時,會在dom0系統中建立一個虛擬網路介面(vxif?.?),該虛擬介面跟domU系統的網路介面(xennet?)橋接,只需要把vxif?.?及xennet?設定同一網段,domU的閘道器指向vxif?.?,然後在dom0系統中做NAT.這樣domU就可以訪問外網.

學習NetBSD-體驗Xen 2.0(轉)

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