Cannot open access to console, the root account is locked. RHEL 9 image


I build an EC2 instance based on RHEL 9 using an M7i.4Xlarge image, but due to application licensing had to limit the available cores to 2cpu.

I then wanted to increate the cores, so I used the following procedure:

  1. create an AMI image of the original machine
  2. terminate original instance (in order to re-use the network interface to preserve the IP address)
  3. launch new instance from AMI image in step 1, but specify 4 cores instead of 2
  4. Boot new instance

I tested this procedure on a 'test' machine and it worked with no issues. However when I do this with my actual application server, the new instance will not boot. I get the error "Cannot open access to console, the root account is locked."

I've detached the boot/root disk and can attach it to a different instance and read the filesystem. /etc/fstab from the non-booting instance is configured to mount the disks by UUID and not device name (found that suggestion I also commented out any remote mountpoints in case that was causing problems. So the only mounts in /etc/fstab will be "/", "/boot" and "boot/efi"

Not sure how to proceed at this point, this thing won't boot AT ALL.

asked 11 days ago105 views
1 Answer

When the host fails to boot, are there any more messages other than "Cannot open access to console, the root account is locked." ?

And when you have (what I'll call) the problem rootdisk mounted on the rescue instance at (say) /mnt can you double-check that the UUIDs listed in /mnt/etc/fstab are definitely correct and complete?

It's easy to get cross-eyed with things like this, and have the wrong disk's UUIDs in place.

On the rescue instance lsblk to list the disks, and then sudo blkid /dev/[second_disk]* (the wildcard will make sure to capture the /boot & /boot/efi devices on the problem root disk as well).

profile picture
answered 10 days ago
profile picture
reviewed 10 days ago

You are not logged in. Log in to post an answer.

A good answer clearly answers the question and provides constructive feedback and encourages professional growth in the question asker.

Guidelines for Answering Questions