pengqiuyuan / docker-kernel-file

Centos 6.5 kernel 2.6 升级到 kernel 4.4.7（longterm）

docker-kernel-file

Centos 6.5 kernel 2.6 升级到 kernel 4.4.7（longterm）

环境：

 系统版本：Linux centos 2.6.32-573.12.1.el6.x86_64（Centos-6.5-x86_64-minimal.iso ）

 升级内核版本：longterm:4.4.7

查看系统内核版本：

[root@10 Dockerfiles]# uname -a
Linux 10.0.29.249 3.10.5-3.el6.x86_64 #1 SMP Tue Aug 20 14:10:49 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
[root@10 Dockerfiles]# cat /etc/redhat-release
CentOS release 6.5 (Final)

下载地址（kernel）：

[root@server-2 etc]# cd /usr/src/kernels/
[root@server-2 kernels]# wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.4.7.tar.xz
[root@server-2 kernels]# tar -xvf linux-4.4.7.tar.xz
[root@server-2 kernels]# cd linux-4.4.7

复制 .config文件：

[root@server-2 kernels]# git clone https://github.com/pengqiuyuan/docker-kernel-file.git
[root@server-2 linux-4.4.7]# cp ./docker-kernel-file/.config .

编译内核：

# make bzImage #生成内核文件
# make modules #编译模块
# make modules_install #安装模块
# make install #安装
 #编译并安装内核(j8代表8个线程同时编译，请根据你的机器情况设置）约30分钟
[root@server-2 linux-4.4.7]# make -j8 bzImage && make -j8 modules && make -j8 modules_install && make install

重启：

 reboot 

注意事项：

 # 重新编译内核请运行
 cd /usr/src/kernels/linux-4.4.7
 make mrproper
 make clean

可能出现的问题：

[root@localhost ~]# service docker start 
Starting cgconfig service: Error: cannot mount memory to /cgroup/memory: No such file or directory
/sbin/cgconfigparser; error loading /etc/cgconfig.conf: Cgroup mounting failed
Failed to parse /etc/cgconfig.conf or /etc/cgconfig.d[FAILED]

办法：
 #编辑内核配置，开启内核CGROUP支持
 make menuconfig
 #选择General setup-->Control Group support->Memory Resource Controller for Control Groups选中
 
 检查cgconfig 是否启动
 /etc/init.d/cgconfig status
 未启动时
 修改vim /etc/cgconfig.conf（注释掉memory）
 #    memory    = /cgroup/memory
 重启  /etc/init.d/cgconfig restart

[root@localhost ~]# docker -d
INFO[0000] Listening for HTTP on unix (/var/run/docker.sock) 
INFO[0000] [graphdriver] using prior storage driver "devicemapper" 
FATA[0000] Error starting daemon: Error initializing network controller: Error creating default "bridge" network: Failed to Setup IP tables: Unable to enable NAT rule: iptables failed: iptables -t nat -I POSTROUTING -s 172.17.42.1/16 ! -o docker0 -j MASQUERADE: iptables v1.4.7: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
 (exit status 3) 
You have new mail in /var/spool/mail/root
[root@localhost ~]# 

原因是： iptables模块没有配置