The current disk size is 64 GB and disk was extended from VMware end, Now time to extend from RedHat OpenShift side.
We are getting below package from the app-stream repository rhel-8-for-x86_64-appstream-rpms, make sure to install it.
$ dnf -y install cloud-utils-growpart
Grow the partition by running growpart command.
$ growpart /dev/sda 4
Run from privileged user.
$ sudo su –
Run program with some namespaces unshared from parent
$ unshare --mount
Mount it with read and write
$ mount -o remount,rw /sysroot
Grow the filesystem.
$ xfs_growfs /sysroot
That’s it the /sysroot filesystem has been extended.