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。


Posted on 2016-01-16 星期六

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