Applies to:
Linux OS - Version Oracle Linux 7.4 to Oracle Linux 7.4 [Release OL7U4]
Linux x86-64
Symptoms
grubby 8.28: unbootable system after Oracle Linux7.5 upgrade.
Changes
Oracle Linux 7.5 upgrade from Oracle Linux 7.4
Cause
Upgrading Oracle Linux 7.4 to Oracle Linux 7.5 with yum update results in unbootable system due to missing initrd16 entry in /boot/grub2/grub.cfg
To reproduce:
- Start with a (minimal) OracleLinux7.4,UEK4 only (no RHCK),kernel NOT up-to-date
- Run yum update
- Verify /boot/grub2/grub.cfg,initrd16 is missing
Solution
Workaround to avoid the problem.
- Proactive: Upgrade kernel before migrating to OracleLinux7.5 (yum update kernel-uek)
