centos yum 升级 kernel

kernel 升级

最简单的kernel升级方法，仅两步：

1. yum upgrade kernel。
2. reboot

[linux]$ uname -a
Linux bjo-ceph-46 3.10.0-1062.el7.x86_64 #1 SMP Wed Aug 7 18:08:02 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[linux]$ sudo -s
[linux]# yum upgrade kernel
Loaded plugins: fastestmirror
Determining fastest mirrors
epel/x86_64/metalink                                                                                                                                                  | 5.5 kB  00:00:00
 * base: mirrors.163.com
 * epel: mirrors.bfsu.edu.cn
 * extras: mirrors.163.com
 * updates: mirrors.bfsu.edu.cn
base                                                                                                                                                                  | 3.6 kB  00:00:00
copr:copr.fedorainfracloud.org:jdoss:wireguard                                                                                                                        | 3.3 kB  00:00:00
docker-ce-stable                                                                                                                                                      | 3.5 kB  00:00:00
epel                                                                                                                                                                  | 4.7 kB  00:00:00
extras                                                                                                                                                                | 2.9 kB  00:00:00
https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyun.com; Unknown error"
Trying other mirror.
updates                                                                                                                                                               | 2.9 kB  00:00:00
(1/7): epel/x86_64/group_gz                                                                                                                                           |  96 kB  00:00:00
(2/7): extras/7/x86_64/primary_db                                                                                                                                     | 242 kB  00:00:00
(3/7): copr:copr.fedorainfracloud.org:jdoss:wireguard/x86_64/primary_db                                                                                               | 2.6 kB  00:00:01
(4/7): epel/x86_64/updateinfo                                                                                                                                         | 1.0 MB  00:00:04
(5/7): docker-ce-stable/7/x86_64/primary_db                                                                                                                           |  62 kB  00:00:11
(6/7): epel/x86_64/primary_db                                                                                                                                         | 6.9 MB  00:00:14
(7/7): updates/7/x86_64/primary_db                                                                                                                                    | 8.8 MB  00:00:14
Resolving Dependencies
--> Running transaction check
---> Package kernel.x86_64 0:3.10.0-1160.31.1.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================================================================================
 Package                                  Arch                                     Version                                                   Repository                                 Size
=============================================================================================================================================================================================
Installing:
 kernel                                   x86_64                                   3.10.0-1160.31.1.el7                                      updates                                    50 M

Transaction Summary
=============================================================================================================================================================================================
Install  1 Package

Total download size: 50 M
Installed size: 64 M
Is this ok [y/d/N]: y
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
kernel-3.10.0-1160.31.1.el7.x86_64.rpm                                                                                                                                |  50 MB  00:00:45
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : kernel-3.10.0-1160.31.1.el7.x86_64                                                                                                                                        1/1
Error! echo
Your kernel headers for kernel 3.10.0-1160.31.1.el7.x86_64 cannot be found at
/lib/modules/3.10.0-1160.31.1.el7.x86_64/build or /lib/modules/3.10.0-1160.31.1.el7.x86_64/source.
  Verifying  : kernel-3.10.0-1160.31.1.el7.x86_64                                                                                                                                        1/1

Installed:
  kernel.x86_64 0:3.10.0-1160.31.1.el7

Complete!

重启之后查看kernel版本

[linux$ uname -a
Linux linux 3.10.0-1160.31.1.el7.x86_64 #1 SMP Thu Jun 10 13:32:12 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

不需要修改其他配置。