lvs fullnat部署手册（一）fullnat内核编译篇

fullnat开源已经有一阵子了，内核版本为2.6.32-220.23.1.e16，项目地址http://kb.linuxvirtualserver.org/wiki/IPVS_FULLNAT_and_SYNPROXY。本屌编译测试环境以下：

centos6.3 64位

编译过程参照官方作法，只是融入后续的打rpm包的部分。过程以下：

1、下载相关代码：

   下载 kernel-2.6.32-220.23.1.el6.src.rpmlinux-2.6.32-220.23.1.el6.x86_64.lvs.src.tar.gz

lvs-fullnat-synproxy.tar.gz

2、编译内核

一、安装kernel-2.6.32-220.23.1.el6.src.rpm

rpm -ivh kernel-2.6.32-220.23.1.el6.src.rpm

二、生成内核源码

   默认的，你会在root家目录下看到rpmbuild目

cd ~/rpmbuild/SPECS
rpmbuild -bp kernel.spec

三、对生成的内核源码打patch默认的

#在/usr/local/src下解压linux-2.6.32-220.23.1.el6.x86_64.lvs.src.tar.gz
tar zxf linux-2.6.32-220.23.1.el6.x86_64.lvs.src.tar.gz
#打patch
cd ~/rpmbuild/BUILD/kernel-2.6.32-220.23.1.el6/linux-2.6.32-220.23.1.el6.x86_64/
cp /usr/local/src/linux-2.6.32-220.23.1.el6.x86_64.lvs/lvs-2.6.32-220.23.1.el6.patch .
#淘宝将IP_VS改为了22，测试时遇到些麻烦，所以改成20了。
#vim .config
CONFIG_IP_VS_TAB_BITS=20
#你能够修改Makefile把内核的名称作下标记（line：4）
EXTRAVERSION = .FNAT.shanks.e27.x86_64

四、make

make -j16
make modules_install
make install;

五、配置grub.conf

#vim /boot/grub/grub.conf
default=0

3、reboot

   reboot以后uname -r看下是否是你想要的内核。

4、打内核rpm包

一、安装kernel-2.6.32-220.23.1.el6.src.rpm

rpm -ivh /usr/local/src/kernel-2.6.32-220.23.1.el6.src.rpm

二、生成内核源码目录

rpmbuild -bp ~/rpmbuild/SPECS/kernel.spec

三、复制出一分内核源码目录

cd ~/rpmbuild/BUILD/kernel-2.6.32-220.23.1.el6/
cp -a linux-2.6.32-220.23.1.el6.x86_64/ linux-2.6.32-220.23.1.el6.x86_64_new

四、为内核打fullnat的patch

cd linux-2.6.32-220.23.1.el6.x86_64_new/
patch -p1 < /usr/local/src/lvs-2.6.32-220.23.1.el6.patch
cp .config ~/rpmbuild/SOURCES/config-x86_64-generic

五、删除原来内核源码目录中的.config文件。

cd ~/rpmbuild/BUILD/kernel-2.6.32-220.23.1.el6/linux-2.6.32-220.23.1.el6.x86_64
rm -rf .config

   不删的话，会在最后打rpm时遇到报错

六、打本身的patch

cd ~/rpmbuild/BUILD/kernel-2.6.32-220.23.1.el6/
diff -uNr linux-2.6.32-220.23.1.el6.x86_64 linux-2.6.32-220.23.1.el6.x86_64_new/ > ../../SOURCES/lvs-2.6.32-220.23.1.el6.patch

七、编辑kernel.spec

vim ~/rpmbuild/SPECS/kernel.spec
line：9    打上个版本号
    %define dist .e27
line：22    打上个名称的标记
    %define distro_build fnat.shanks
line：605    标记下本身的patch
    Patch999999: lvs-2.6.32-220.23.1.el6.patch
line：915    让本身的patch生效
    ApplyOptionalPatch lvs-2.6.32-220.23.1.el6.patch

八、打rpm

rpmbuild -bb --with baseonly --with firmware --without debuginfo --target=x86_64 SPECS/kernel.spec

在这里若是遇到这样的报错：
+ cp /root/rpmbuild/SOURCES/Module.kabi_x86_64 /root/rpmbuild/BUILDROOT/kernel-2.6.32-fnat.shanks.e27.x86_64/Module.kabi
+ /root/rpmbuild/SOURCES/check-kabi -k /root/rpmbuild/BUILDROOT/kernel-2.6.32-fnat.shanks.e27.x86_64/Module.kabi -s Module.symvers
*** ERROR - ABI BREAKAGE WAS DETECTED ***
The following symbols have been changed (this will cause an ABI breakage):
register_ip_vs_scheduler
unregister_ip_vs_scheduler
+ exit 1
error: Bad exit status from /var/tmp/rpm-tmp.0Wfj33 (%build)
RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.0Wfj33 (%build)
能够在rpmbuild的时候加上--without kabichk

参考：https://fedoraproject.org/wiki/Building_a_custom_kernel/zh-cn

   http://wiki.centos.org/HowTos/Custom_Kernel