CentOS6下快速配置Xen 4.1.1环境

准备工作

• CentOS 6.0, Minimal安装, SELINUX=disabled, 配置好SRPM的repo地址

操作步骤

 1. 安装基本软件包

yum -y install openssh-clients gcc g++ make automake autoconf wget glibc-devel glibc-devel.i686 libaio rpm-build yum-utils transfig libidn-devel zlib-devel texi2html SDL-devel curl-devel libX11-devel python-devel ghostscript tetex-latex ncurses-devel gtk2-devel libaio-devel texinfo dev86 gettext gnutls-devel openssl-devel pciutils-devel libuuid-devel iasl bzip2-devel xz-devel e2fsprogs-devel PyXML kpartx bridge-utils libsysfs-devel libsysfs libnl-devel libtool nfs-utils libxml2-devel xhtml1-dtds readline-devel libudev-devel  libpciaccess-devel yajl-devel libpcap-devel avahi-devel dnsmasq cyrus-sasl-devel polkit lvm2 iscsi-initiator-utils parted-devel device-mapper-devel numactl-devel libcap-ng-devel netcf-devel ebtables lzop nc cyrus-sasl-md5 python-virtinst

 2. 安装qemu

wget http://mirrors.ustc.edu.cn/fedora/linux/updates/13/x86_64/qemu-common-0.13.0-1.fc13.x86_64.rpmwget http://mirrors.ustc.edu.cn/fedora/linux/updates/13/x86_64/qemu-img-0.13.0-1.fc13.x86_64.rpmrpm -Uvh qemu-*.rpm

 3. 通过srpm编译安装Xen

wget http://mirrors.ustc.edu.cn/fedora/linux/updates/15/SRPMS/xen-4.1.1-3.fc15.src.rpmrpm -i xen-4.1.1-3.fc15.src.rpmcd ~/rpmbuild/SPECS/rpmbuild -bb xen.speccd ~/rpmbuild/RPMS/x86_64/rpm -Uvh xen-*4.1.1-*.rpm

4. 修改bridge-utils, CentOS 6.0的默认内核被加了IGMP的patch, 其自带的bridge-utils也打了这个patch, 在非rhel6的内核上运行会出现很多没用的提示。

yumdownloader --source bridge-utilsrpm -i bridge-utils-1.2-9.el6.src.rpm # 版本可能不同cd ~/rpmbuild/SPECS/vi bridge-utils.spec# 去除两行有patch4的地方, 也即有IGMP的patch的行rpmbuild -bb bridge-utils.speccd ~/rpmbuild/RPMS/x86_64/rpm -Uvh --force bridge-utils-1.2-9.el6.x86_64.rpm

提供一个patch

--- bridge-utils.spec.orig      2010-04-30 00:29:16.000000000 +0800+++ bridge-utils.spec   2011-09-30 23:27:19.090747706 +0800@@ -10,7 +10,6 @@ Patch1: bridge-utils-1.2-show-ports.patch Patch2: bridge-utils-1.2-foreach.patch Patch3: bridge-utils-1.2-params.patch-Patch4: bridge-utils-1.2-Add_IGMP_snooping_support.patch BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX) BuildRequires: libsysfs-devel autoconf@@ -32,7 +31,6 @@ %patch1 -p1 %patch2 -p1 %patch3 -p1-%patch4 -p1 -b .Add_IGMP_snooping_support %build autoconf

 5. 安装libvirt, CentOS6自带的不支持xen, 需要打开xen的选项重新编译

yumdownloader --source libvirtrpm -i libvirt-0.8.1-27.el6_0.6.src.rpm # 版本可能不同cd ~/rpmbuild/SPECS/vi libvirt.spec # 按下面的patch修改rpmbuild -bb libvirt.speccd ~/rpmbuild/RPMS/x86_64/rpm -Uvh libvirt-*0.8.1*.rpm

Patch: 

--- libvirt.spec.orig   2010-08-18 15:02:53.000000000 +0300+++ libvirt.spec        2010-11-15 14:17:36.388996162 +0200@@ -104,7 +104,7 @@ %ifnarch x86_64 %define with_qemu 0 %endif-%define with_xen 0+%define with_xen 1 %endif # If Xen isn't turned on, we shouldn't build the xen proxy either

6. 安装python-virtinst，旧的版本不支持的参数太多了

# 从redhat网站下载srpmwget http://ftp.redhat.com/redhat/linux/enterprise/6Server/en/os/SRPMS/python-virtinst-0.500.5-3.el6.src.rpmrpm -i python-virtinst-0.500.5-3.el6.src.rpmcd ~/rpmbuild/SPECS/rpmbuild -bb python-virtinst.speccd ~/rpmbuild/RPMS/noarch/rpm -Uvh --force python-virtinst-*.rpm

7. 编译安装内核

# 从github下载内核wget https://github.com/jsgf/linux-xen/tarball/xen-2.6.32.46 -O kernel-xen-2.6.32.46.tar.gz# 下载configwget http://pasik.reaktio.net/xen/kernel-config/config-2.6.32.43-pvops-dom0-xen-stable-x86_64# 可以先修改config里面的CONFIG_LOCALVERSION项, 给这个内核起个别名, 比如-dom0-xen, 以下为没有修改的情况 tar xzf kernel-xen-2.6.32.46.tar.gzcp config-2.6.32.43-pvops-dom0-xen-stable-x86_64 jsgf-linux-xen-1c3f03c/.configcd jsgf-linux-xen-1c3f03cmake oldconfigmake -j4 bzImagemake -j4 modulesmake modules_installdepmod -a 2.6.32.46cp -a arch/x86/boot/bzImage /boot/vmlinuz-2.6.32.46cp -a System.map /boot/System.map-2.6.32.46cp -a .config /boot/config-2.6.32.46cd /boot/dracut --force initramfs-2.6.32.46.img 2.6.32.46# 关闭ksm, 跟xen不兼容chkconfig ksm offchkconfig ksmtuned off

 8. 编辑/boot/grub/menu.lst, 添加

title Xen 4.0 with Linux 2.6.32.46        root (hd0,0)        kernel /xen.gz dom0_mem=2048M loglvl=all guest_loglvl=all        module /vmlinuz-2.6.32.46 ro root=/dev/sda2 rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM KEYBOARDTYPE=pc KEYTABLE=us SYSFONT=latarcyrheb-sun16 LANG=en_US.UTF-8 nomodeset        module /initramfs-2.6.32.46.img

 9. 编辑/etc/xen/xend-config.sxp, 按自己的需求修改

......(xend-http-server yes)(xend-unix-server yes)(xend-tcp-xmlrpc-server yes)......(xend-relocation-server yes)......(xend-tcp-xmlrpc-server-address '0.0.0.0')(xend-tcp-xmlrpc-server-port 8006)......(xend-relocation-port 8002)......(xend-address localhost)......(xend-relocation-address '0.0.0.0')..................

 10.  配置libvirtd

groupadd libvirtvi /etc/libvirt/libvirtd.confunix_sock_group = "libvirt"unix_sock_ro_perms = "0777"unix_sock_rw_perms = "0770"

 11. 重启, 启动Xen的内核

 12. 把上面做的事情, 写成一套脚本

其他配置

 1. libvirtd第一次启动时, 会生成一个虚拟网卡virbr0, 如果需要nat网络就留着，如果要用bridge做共享网络可以按如下方法删除

virsh net-destroy defaultvirsh net-undefine defaultservice libvirtd restart

建立用于网络安装CentOS6的环境

 1. 将CentOS的所有iso里面的所有文件都复制到同一个目录下

 2. 在那个目录里面执行

mkdir -p images/xencp images/pxeboot/initrd.img images/xen/cp images/pxeboot/vmlinuz images/xen/

 3. 把一个http服务器指向这个目录即可

创建CentOS6虚拟机

 1. 使用virt-install安装

virt-install \ -p \ -n centos6 \ -r 4096 \ --vcpus=1 \ --disk path=/home/vms/centos6/sda.img,size=2,format='raw',driver_name='file' \ --graphics none \ -l http://10.100.6.48/CentOS \ -w bridge=xenbr0 \ --os-type=linux# -p: paravirt模式执行# -n: 虚拟机名字# -r: 内存大小, 以MB计# --vcpus: 虚拟的CPU数# --disk: 磁盘参数, path:路径; size:大小, 以GB计; format='raw':raw模式; driver_name='file': 默认是aio:tap, 但是CentOS6的默认内核不支持, 安装时找不到硬盘# --graphics none: 以console模式启动# -l http://10.100.6.48/CentOS: 上面介绍的自己的建立CentOS的网络安装环境# -w bridge=xenbr0, xenbr0是与可访问安装环境的网卡绑定的网桥

 2. 安装的时候建议选择VNC方式安装，console下面不能自定分区

参考

http://wiki.xen.org/xenwiki/RHEL6Xen4Tutorial