centos7.9升级3.10内核至5.4

原创已于 2023-10-07 09:30:06 修改 · 1.5k 阅读

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#docker #linux #运维

于 2023-10-07 09:24:39 首次发布

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博客介绍了搭建K8S环境时内核版本要求及升级方法。需内核版本大于4.4，先查看当前内核版本，添加阿里源，重建yum缓存，查看并安装内核包，设置启动内核，最后重启验证是否生效。

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我们搭建K8S环境的时候，内核版本最好要大于4.4

先查看内核版本：uname -r

[root@k8s-master ~]# uname -r
3.10.0-1160.el7.x86_64

显示为3.10，查看关于内核的包：rpm -qa |grep kernel

[root@k8s-master ~]# rpm -qa |grep kernel
kernel-devel-3.10.0-1160.el7.x86_64
kernel-tools-libs-3.10.0-1160.el7.x86_64
abrt-addon-kerneloops-2.1.11-60.el7.centos.x86_64
kernel-headers-3.10.0-1160.el7.x86_64
kernel-3.10.0-1160.el7.x86_64
kernel-tools-3.10.0-1160.el7.x86_64

添加阿里源：

cat <<EOF > /etc/yum.repos.d/elrepo.repo

[elrepo]

name=elrepo

baseurl=https://mirrors.aliyun.com/elrepo/archive/kernel/el7/x86_64

gpgcheck=0

enabled=1

EOF

[root@k8s-master ~]# cat <<EOF > /etc/yum.repos.d/elrepo.repo
> [elrepo]
> name=elrepo
> baseurl=https://mirrors.aliyun.com/elrepo/archive/kernel/el7/x86_64
> gpgcheck=0
> enabled=1
> EOF
[root@k8s-master ~]# cat /etc/yum.repos.d/elrepo.repo 
[elrepo]
name=elrepo
baseurl=https://mirrors.aliyun.com/elrepo/archive/kernel/el7/x86_64
gpgcheck=0
enabled=1

重建yum缓存：yum clean all && yum makecache

[root@k8s-master ~]# yum clean all && yum makecache
Loaded plugins: fastestmirror, langpacks
Cleaning repos: base docker-ce-stable elrepo extras kubernetes updates
Cleaning up list of fastest mirrors
Loaded plugins: fastestmirror, langpacks
Determining fastest mirrors
 * base: mirrors.aliyun.com
 * extras: mirrors.ustc.edu.cn
 * updates: mirrors.ustc.edu.cn
base                                                                                                                                                                                                            | 3.6 kB  00:00:00     
docker-ce-stable                                                                                                                                                                                                | 3.5 kB  00:00:00     
elrepo                                                                                                                                                                                                          | 3.0 kB  00:00:00     
extras                                                                                                                                                                                                          | 2.9 kB  00:00:00     
kubernetes/signature                                                                                                                                                                                            |  454 B  00:00:00     
kubernetes/signature                                                                                                                                                                                            | 1.4 kB  00:00:00 !!! 
updates                                                                                                                                                                                                         | 2.9 kB  00:00:00     
(1/20): base/7/x86_64/group_gz                                                                                                                                                                                  | 153 kB  00:00:00     
(2/20): docker-ce-stable/7/x86_64/filelists_db                                                                                                                                                                  |  47 kB  00:00:00     
(3/20): docker-ce-stable/7/x86_64/updateinfo                                                                                                                                                                    |   55 B  00:00:00     
(4/20): docker-ce-stable/7/x86_64/primary_db                                                                                                                                                                    | 117 kB  00:00:00

查看yum仓库中的内核包：yum list --showduplicate kernel*

安装内核：yum install -y kernel-lt-5.4.257 kernel-lt-devel-5.4.257

[root@k8s-master ~]# yum install -y kernel-lt-5.4.257-1
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.ustc.edu.cn
 * updates: mirrors.ustc.edu.cn
No package kernel-lt-5.4.257-1 available.
Error: Nothing to do
[root@k8s-master ~]# yum install -y kernel-lt-5.4.257
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.ustc.edu.cn
 * updates: mirrors.ustc.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package kernel-lt.x86_64 0:5.4.257-1.el7.elrepo will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=======================================================================================================================================================================================================================================
 Package                                               Arch                                               Version                                                             Repository                                          Size
=======================================================================================================================================================================================================================================
Installing:
 kernel-lt                                             x86_64                                             5.4.257-1.el7.elrepo                                                elrepo                                              50 M

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

Total download size: 50 M
Installed size: 230 M
Downloading packages:
kernel-lt-5.4.257-1.el7.elrepo.x86_64.rpm                                                                                                                                                                       |  50 MB  00:00:42     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : kernel-lt-5.4.257-1.el7.elrepo.x86_64                                                                                                                                                                               1/1 
  Verifying  : kernel-lt-5.4.257-1.el7.elrepo.x86_64                                                                                                                                                                               1/1 

Installed:
  kernel-lt.x86_64 0:5.4.257-1.el7.elrepo                                                                                                                                                                                              

Complete!
[root@k8s-master ~]# yum install -y kernel-lt-devel-5.4.257
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.ustc.edu.cn
 * updates: mirrors.ustc.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package kernel-lt-devel.x86_64 0:5.4.257-1.el7.elrepo will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=======================================================================================================================================================================================================================================
 Package                                                    Arch                                              Version                                                          Repository                                         Size
=======================================================================================================================================================================================================================================
Installing:
 kernel-lt-devel                                            x86_64                                            5.4.257-1.el7.elrepo                                             elrepo                                             13 M

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

Total download size: 13 M
Installed size: 49 M
Downloading packages:
kernel-lt-devel-5.4.257-1.el7.elrepo.x86_64.rpm                                                                                                                                                                 |  13 MB  00:00:11     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : kernel-lt-devel-5.4.257-1.el7.elrepo.x86_64                                                                                                                                                                         1/1 
  Verifying  : kernel-lt-devel-5.4.257-1.el7.elrepo.x86_64                                                                                                                                                                         1/1 

Installed:
  kernel-lt-devel.x86_64 0:5.4.257-1.el7.elrepo                                                                                                                                                                                        

Complete!

查看启动内核：cat /etc/grub2.cfg | grep menuentry|awk -F "\'" '$1=="menuentry " {print i++ " : " $2}'

[root@k8s-master ~]# cat /etc/grub2.cfg | grep menuentry|awk -F "\'" '$1=="menuentry " {print i++ " : " $2}' 
awk: warning: escape sequence `\'' treated as plain `''
0 : CentOS Linux (5.4.257-1.el7.elrepo.x86_64) 7 (Core)
1 : CentOS Linux (3.10.0-1160.el7.x86_64) 7 (Core)
2 : CentOS Linux (0-rescue-2d4005070b6045f28839cde26ee9598b) 7 (Core)

设置启动内核：grub2-set-default 0

[root@k8s-master ~]# grub2-set-default 0

重启，查看是否生效：reboot

uname -r

[d:\~]$ 

Connecting to 192.168.200.141:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.

Last login: Fri Oct  6 17:49:52 2023 from 192.168.200.1
[root@k8s-master ~]# uname -r
5.4.257-1.el7.elrepo.x86_64