Patch Install Failed and /boot space went to 99%

Products

• CA API Gateway

Issue/Introduction

We were performing patching on our PreLive nodes and the patch [Layer7_API_PlatformUpdate_64bit_v11.1-Debian-2025-08-24] failed for 2 of our worker nodes and then these nodes also had were on 99% /boot space. Is there any way to debug the issue .

Environment

11.1

Resolution

The patch process is trying to reinstall or update GRUB (the bootloader) as part of the API Gateway patch, and it fails 

That means your /boot (or /boot/efi) partition is out of space, so GRUB can’t install its locale files. As a result, the patch warns that the bootloader may not be properly installed, and the system might not be bootable after a reboot.

Check the partition usage :-

df -h /boot /boot/efi

This will show if /boot or /boot/efi is full.

please take a back up of the current setup.

 Make sure to keep the current kernel (uname -r) and at least one backup kernel.

First :- dpkg -l 'linux-image-*' | grep '^ii' :-- to list all kernel packages , then Remove older kernels, pick all the ones you need to remove . and then clean up the dependencies , verify the free space and reinstall Grub properly, 

Re-run your API Gateway patch after confirming GRUB is fixed.