Centos 8.2 升级内核通过elrepo源的方法

一、Centos 8.2 升级内核通过elrepo源

地址

https://www.kernel.org
http://elrepo.org/tiki/tiki-index.php

查看linux内核版本

[root@localhost ~]# cat /proc/version
Linux version 4.18.0-193.el8.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 8.3.1 20191121 (Red Hat 8.3.1-5) (GCC)) #1 SMP Fri May 8 10:59:10 UTC 2020
[root@localhost ~]# uname -a
Linux localhost.localdomain 4.18.0-193.el8.x86_64 #1 SMP Fri May 8 10:59:10 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

查看yum中可升级的内核版本

[root@localhost ~]# yum list kernel –showduplicates
CentOS Linux 8 – BaseOS 1.2 MB/s | 4.6 MB 00:03
CentOS-8 – Extras 4.9 kB/s | 11 kB 00:02
Last metadata expiration check: 0:00:01 ago on Sat 15 Oct 2022 02:58:01 PM CST.
Installed Packages
kernel.x86_64 4.18.0-193.el8 @anaconda
Available Packages
kernel.x86_64 4.18.0-348.el8 baseos
kernel.x86_64 4.18.0-348.2.1.el8_5 baseos
kernel.x86_64 4.18.0-348.7.1.el8_5 baseos

注意：可能要配置yum原（去找找吧）当然在我二进制安装kubernetes 最后标题报错有配置yum原

导入ELRepo软件仓库的公共秘钥

rpm –import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

CentOS 8 系统安装ELRepo

[root@localhost ~]# rpm –import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
[root@localhost ~]# yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm
Last metadata expiration check: 0:05:56 ago on Sat 15 Oct 2022 02:58:01 PM CST.
elrepo-release-8.el8.elrepo.noarch.rpm 6.7 kB/s | 13 kB 00:01
Dependencies resolved.
==================================================================================================================
Package Architecture Version Repository Size
==================================================================================================================
Installing:
elrepo-release noarch 8.3-1.el8.elrepo @commandline 13 k

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

Total size: 13 k
Installed size: 5.0 k
Is this ok [y/N]: y
Downloading Packages:
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : elrepo-release-8.3-1.el8.elrepo.noarch 1/1
Verifying : elrepo-release-8.3-1.el8.elrepo.noarch 1/1
Installed products updated.

Installed:
elrepo-release-8.3-1.el8.elrepo.noarch

Complete!

查看ELRepo提供的内核版本

内核版本简写说明

kernel-lt(lt=long-term)长期有效

kernel-ml(ml=mainline)主流版本

[root@localhost ~]# ELRepo.org Community Last metadata expiration Available Packages
bpftool.x86_64 kernel-lt.x86_64 kernel-lt-core.x86_64 kernel-lt-devel.x86_64 kernel-lt-doc.noarch kernel-lt-headers.x86_64 kernel-lt-modules.x86_64 kernel-lt-modules-extra.x86_64 kernel-lt-tools.x86_64 kernel-lt-tools-libs.x86_64 kernel-lt-tools-libs-devel.x86_64 kernel-ml.x86_64 kernel-ml-core.x86_64 kernel-ml-devel.x86_64 kernel-ml-doc.noarch kernel-ml-headers.x86_64 kernel-ml-modules.x86_64 kernel-ml-modules-extra.x86_64 kernel-ml-tools.x86_64 kernel-ml-tools-libs.x86_64 kernel-ml-tools-libs-devel.x86_64 perf.x86_64 python3-perf.x86_64 yum –disablerepo=\”*\” –enablerepo=\”elrepo-kernel\” list available
Enterprise Linux Kernel Repository – el8 31 kB/s | 2.1 MB 01:08
check: 0:00:01 ago on Sat 15 Oct 2022 03:06:34 PM CST.
6.0.1-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
5.4.217-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kernel
6.0.1-1.el8.elrepo elrepo-kerne

安装长期支持的内核

[root@localhost ~]# yum –enablerepo=elrepo-kernel install kernel-lt.x86_64 kernel-lt-devel.x86_64
ELRepo.org Community Enterprise Linux Repository – el8 5.4 kB/s | 259 kB 00:47
ELRepo.org Community Enterprise Linux Kernel Repository – el8 353 kB/s | 2.1 MB 00:06
Last metadata expiration check: 0:00:01 ago on Sat 15 Oct 2022 03:14:19 PM CST.
Dependencies resolved.
==================================================================================================================
Package Architecture Version Repository Size
==================================================================================================================
Installing:
kernel-lt x86_64 5.4.217-1.el8.elrepo elrepo-kernel 75 k
kernel-lt-devel x86_64 5.4.217-1.el8.elrepo elrepo-kernel 13 M
Installing dependencies:
kernel-lt-core x86_64 5.4.217-1.el8.elrepo elrepo-kernel 28 M
kernel-lt-modules x86_64 5.4.217-1.el8.elrepo elrepo-kernel 25 M

Transaction Summary
==================================================================================================================
Install 4 Packages

Total download size: 66 M
Installed size: 136 M
Is this ok [y/N]: y
Downloading Packages:
(1/4): kernel-lt-5.4.217-1.el8.elrepo.x86_64.rpm 69 kB/s | 75 kB 00:01
(2/4): kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64.rpm 1.2 MB/s | 13 MB 00:10
(3/4): kernel-lt-core-5.4.217-1.el8.elrepo.x86_64.rpm 719 kB/s | 28 MB 00:40
(4/4): kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64.rpm 339 kB/s | 25 MB 01:14
——————————————————————————————————————
Total 371 kB/s | 66 MB 03:02
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : kernel-lt-core-5.4.217-1.el8.elrepo.x86_64 1/4
Running scriptlet: kernel-lt-core-5.4.217-1.el8.elrepo.x86_64 1/4
Installing : kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64 2/4
Running scriptlet: kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64 2/4
Installing : kernel-lt-5.4.217-1.el8.elrepo.x86_64 3/4
Installing : kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 4/4
Running scriptlet: kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 4/4
Running scriptlet: kernel-lt-core-5.4.217-1.el8.elrepo.x86_64 4/4
Running scriptlet: kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 4/4
Verifying : kernel-lt-5.4.217-1.el8.elrepo.x86_64 1/4
Verifying : kernel-lt-core-5.4.217-1.el8.elrepo.x86_64 2/4
Verifying : kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 3/4
Verifying : kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64 4/4
Installed products updated.

Installed:
kernel-lt-5.4.217-1.el8.elrepo.x86_64 kernel-lt-core-5.4.217-1.el8.elrepo.x86_64
kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64

Complete!

查看系统可用内核，并设置启动项

sudo awk -F\\\’ \’$1==\”menuentry \” {print i++ \” : \” $2}\’ /etc/grub2.cfg

有知道的可以评论留言下，非常感谢！[8 不好使]

指定开机启动内核版本

grub2-set-default 0

生成 grub 配置文件

[root@localhost ~]# grub2-set-default 0
[root@localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file …
done

重启

reboot

验证

cat /proc/version
uname -r