How to test a post kernel update reboot in an unattended or resilient manner?
Issue
- We experience kernel boot failures following updates periodically that require administrator intervention. How can we avoid having to involve administrators in the event that a kernel update goes badly?
- How to attempt to boot into a new kernel, but use a functioning kernel if it fails?
Environment
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 10
grub2
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