Upgrade Kernel on Centos7 via ELRepo

centos7_kernel_update.md

Install the ELRepo and GPG key

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
yum install -y http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

Enable kernel updates from elrepo

yum-config-manager --enable elrepo-kernel

Remove old kernel stuff

yum remove -y kernel-{devel,tools,tools-libs}

Install the ELRepo built kernel and grub2-tools

yum install -y kernel-ml kernel-ml-{devel,tools,tools-libs} grub2-tools

We ensure these exist on the off chance they were removed during the kernel stuff above

yum install -y dkms gcc redhat-lsb-languages

Build a new grub config with the ELRepo kernel entry

grub2-mkconfig -o /boot/grub2/grub.cfg
grep vmlinuz /boot/grub2/grub.cfg

Ensure we boot the latest kernel

grub2-set-default 0

I think you should remove the -y from yum remove -y kernel-{devel,tools,tools-libs} so that the user can see what all will be removed before they commit to running it.

Hi @thpryrchn,

That's a good idea, but this was initially what I used on servers before I built ansible automation to do it for me. When starting up the server and having a script perform the task, you don't exactly need to worry what packages are removed as long as the server comes online post-reboot with the new el-repo kernel.

Aww.. BTW, the repo install has changed... It is now yum -y install https://www.elrepo.org/elrepo-release-7.0-4.el7.elrepo.noarch.rpm

Thanks! I haven't used any of this particular code in years and it is woefully out of date.