centos7.0 安装docker
http://www.centoscn.com/CentosBug/osbug/2015/0527/5539.html
下面是把centos 7.0默认3.10版本内核升级为4.0.2版本过程
1、导入yum源的认证key
rpm -- import https: //www .elrepo.org /RPM-GPG-KEY-elrepo .org |
2、安装yum源
rpm -Uvh http: //www .elrepo.org /elrepo-release-7 .0-2.el7.elrepo.noarch.rpm |
3、安装新内核
在yum的ELRepo源中,有mainline(4.0.2)这个内核版本
[root@ip-10-10-29-201 ~] # yum --enablerepo=elrepo-kernel install kernel-ml-devel kernel-ml Loaded plugins: fastestmirror MooseFS | 951 B 00:00:00 base | 3.6 kB 00:00:00 elrepo | 2.9 kB 00:00:00 elrepo-kernel | 2.9 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 (1 /2 ): elrepo /primary_db | 233 kB 00:00:02 (2 /2 ): elrepo-kernel /primary_db | 782 kB 00:00:04 MooseFS /primary | 4.2 kB 00:00:00 Loading mirror speeds from cached hostfile * base: mirrors.yun-idc.com * elrepo: repos.lax-noc.com * elrepo-kernel: repos.lax-noc.com * extras: mirror.bit.edu.cn * updates: mirror.bit.edu.cn MooseFS 30 /30 Resolving Dependencies --> Running transaction check ---> Package kernel-ml.x86_64 0:4.0.2-1.el7.elrepo will be installed ---> Package kernel-ml-devel.x86_64 0:4.0.2-1.el7.elrepo will be installed --> Finished Dependency Resolution Dependencies Resolved ========================================================================================================================================================================== Package Arch Version Repository Size ========================================================================================================================================================================== Installing: kernel-ml x86_64 4.0.2-1.el7.elrepo elrepo-kernel 36 M kernel-ml-devel x86_64 4.0.2-1.el7.elrepo elrepo-kernel 9.5 M Transaction Summary ========================================================================================================================================================================== Install 2 Packages Total download size: 45 M Installed size: 199 M Is this ok [y /d/N ]: y Downloading packages: (1 /2 ): kernel-ml-4.0.2-1.el7.elrepo.x86_64.rpm | 36 MB 00:00:11 (2 /2 ): kernel-ml-devel-4.0.2-1.el7.elrepo.x86_64.rpm | 9.5 MB 00:00:31 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Total 1.5 MB /s | 45 MB 00:00:31 Running transaction check Running transaction test Transaction test succeeded Running transaction Warning: RPMDB altered outside of yum. Installing : kernel-ml-devel-4.0.2-1.el7.elrepo.x86_64 1 /2 Installing : kernel-ml-4.0.2-1.el7.elrepo.x86_64 2 /2 Verifying : kernel-ml-4.0.2-1.el7.elrepo.x86_64 1 /2 Verifying : kernel-ml-devel-4.0.2-1.el7.elrepo.x86_64 2 /2 Installed: kernel-ml.x86_64 0:4.0.2-1.el7.elrepo kernel-ml-devel.x86_64 0:4.0.2-1.el7.elrepo Complete! |
4、查看当前内核版本
[root@ip-10-10-29-201 ~] # uname -r 3.10.0-123.el7.x86_64 |
重要:目前内核还是默认的版本,如果在这一步完成后你就直接reboot了,重启后使用的内核版本还是默认的3.10,不会使用新的4.0.2,想修改启动的顺序,需要进行下一步
查看默认启动顺序
[root@ip-10-10-29-201 ~] # awk -F\' '$1=="menuentry " {print $2}' /etc/grub2.cfg CentOS Linux (4.0.2-1.el7.elrepo.x86_64) 7 (Core) CentOS Linux, with Linux 3.10.0-123.el7.x86_64 CentOS Linux, with Linux 0-rescue-18b184aa09434ecf9739a70c6b63638a |
默认启动的顺序是从0开始,但我们新内核是从头插入(目前位置在1,而4.0.2的是在0),所以需要选择0,如果想生效最新的内核,需要
[root@ip-10-10-29-201 ~] # grub2-set-default 0 |
5、重启
Reboot |
6、重启后查看内核
[root@ip-10-10-29-201 conf] # uname -r 4.0.2-1.el7.elrepo.x86_64 |
经过升级后,20天没有出现此问题,所以判断此次文件为内核bug引起,通过升级内核解决。