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lavabit / robox

The tools needed to robotically create/configure/provision a large number of operating systems, for a variety of hypervisors, using packer.
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apt-get upgrade on Ubuntu 20.04 box fails because there is not enough space in /boot #294

Open evgeni opened 5 months ago

evgeni commented 5 months ago

Ohai,

I've tested this on the following boxes, but I think others could be affected too:

When you boot the machine, you see there are at least two kernels installed:

root@ubuntu2004:~# ls /boot/
config-5.4.0-169-generic  grub        initrd.img-5.4.0-169-generic      initrd.img-5.4.0-42-generic      initrd.img.old  System.map-5.4.0-169-generic  vmlinuz                    vmlinuz-5.4.0-42-generic
config-5.4.0-42-generic   initrd.img  initrd.img-5.4.0-169-generic.img  initrd.img-5.4.0-42-generic.img  lost+found      System.map-5.4.0-42-generic   vmlinuz-5.4.0-169-generic  vmlinuz.old

Additionally, the initrds are doubled: initrd.img-5.4.0-169-generic and initrd.img-5.4.0-169-generic.img (and same for -42-). However, the ones ending in .img are not referenced from the grub.cfg at all:

# grep img /boot/grub/grub.cfg 
    initrd  /initrd.img-5.4.0-169-generic
        initrd  /initrd.img-5.4.0-169-generic
        initrd  /initrd.img-5.4.0-169-generic
        initrd  /initrd.img-5.4.0-42-generic
        initrd  /initrd.img-5.4.0-42-generic

Calling apt-get update && apt-get upgrade results in:

Processing triggers for initramfs-tools (0.136ubuntu6.7) ...
update-initramfs: Generating /boot/initrd.img-5.4.0-170-generic
Error 24 : Write error : cannot write compressed block 
E: mkinitramfs failure cpio 141 lz4 -9 -l 24
update-initramfs: failed for /boot/initrd.img-5.4.0-170-generic with 1.
dpkg: error processing package initramfs-tools (--configure):
 installed initramfs-tools package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)

Calling rm -f /boot/*-generic.img before doing the upgrade cleans up enough space to not break things.

I think two optimizations can be made: