centos7.5 update kernel to 4.18 stable version

centos7.5 Update Kernel to 4.18

Docker's minimum requirement for the Linux kernel version is 3.10. Now that the Linux kernel has been released to 4.18, the company-related CentOS 7 kernel needs to be upgraded for better use of Docker and k8s.

Download Public key

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

Installing Elrepo Repo

rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm

When the warehouse is enabled, lists the available kernel-related packages:

Query all kernel Packages

rpm -qa|grep kernel
kernel-devel-3.10.0-862.6.3.el7.x86_64
kernel-tools-libs-3.10.0-862.6.3.el7.x86_64
kernel-tools-3.10.0-862.6.3.el7.x86_64
kernel-devel-3.10.0-862.el7.x86_64
abrt-addon-kerneloops-2.1.11-50.el7.centos.x86_64
kernel-3.10.0-862.6.3.el7.x86_64
kernel-headers-3.10.0-862.6.3.el7.x86_64

Delete all old kernel-related packages based on the above query results

yum remove kernel-devel kernel-tools-libs kernel-tools kernel-headers

Uninstalling the above package will be associated with uninstalling the following installation package that needs to be updated and reinstalled. Kernel-devel will be associated with the deletion of Systemtap and Systemtap-devel. Kernel-headers is related to the following.

compat-glibc   x86_64   1:2.12-4.el7.centos
compat-glibc-headers  x86_64   1:2.12-4.el7.centos
gcc x86_64   4.8.5-28.el7_5.1
gcc-c++x86_64   4.8.5-28.el7_5.1
gcc-gfortran   x86_64   4.8.5-28.el7_5.1
glibc-develx86_64   2.17-222.el7
glibc-headers  x86_64   2.17-222.el7
libquadmath-devel  x86_64   4.8.5-28.el7_5.1
libtool x86_64   2.4.2-22.el7_3
systemtap   x86_64   3.2-8.el7_5
systemtap-develx86_64   3.2-8.el7_5

Install the new kernel

yum --enablerepo=elrepo-kernel install -y kernel-ml.x86_64

Install new kernel-related software

yum --disablerepo=\* --enablerepo=elrepo-kernel install -y  kernel-ml-devel kernel-ml-tools kernel-ml-tools-libs kernel-ml-tools-libs-devel kernel-ml-headers

Viewing the default kernel

grub2-editenv list

Set the new kernel as the default Grbu startup item

grub2-set-default 0

Generating the Grub configuration file

grub2-mkconfig -o /etc/grub2.cfgreboot   #Can also be restarted

Delete old kernel

yum remove kernel-3.10.0-862.6.3.el7.x86_64

Installing software that was uninstalled when the old kernel was updated

yum install -y compat-glibc compat-glibc-headers gcc gcc-c++ gcc-gfortran glibc-devel glibc-headers libquadmath-devel libtool systemtap systemtap-devel

Viewing the default kernel

grub2-editenv listsaved_entry=CentOS Linux (4.18.11-1.el7.elrepo.x86_64) 7 (Core)

centos7.5 update kernel to 4.18 stable version