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Old 02-12-2019, 07:58 PM   #1
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/boot partition running out of space randomly. Please help!!

Hello all

First off, I am running Oracle Linux 7.6 on a Hyper-V 2016 VM for a customer. Here is the issue. I have a 600MB /boot partition allocated on a UEFI system. The /boot/efi partition is on a separate EFI partition. Recently, I noticed that this system has been crashing every few minutes and when I checked the disk space, I noticed that the /boot partition has zero free space available. I removed all of the old kernels and left the running kernel in place, in hopes that will free up some space. It freed up about 50MB or so, but then the system would crash again. After I would reboot the VM to bring the system back up, I ran a df -h /boot, and the results were reporting ZERO disk space again for the /boot partition.. It makes absolutely no sense how a partition which is generally static UNLESS you move something into it, is running out of space after space has been manually freed up in the partition! What boggles me even more is that when I do an ls -lh /boot, the file systems do not add up to 600M (well 594M) at all. See below:

df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 2.8G 0 2.8G 0% /dev
tmpfs 2.8G 0 2.8G 0% /dev/shm
tmpfs 2.8G 8.5M 2.8G 1% /run
tmpfs 2.8G 0 2.8G 0% /sys/fs/cgroup
/dev/mapper/VolGroup00-LogVolRoot 30G 19G 12G 63% /
/dev/sda2 594M 594M 0 100% /boot
/dev/sda1 238M 9.7M 229M 5% /boot/efi
/dev/mapper/VolGroup00-LogVolHome 3.3G 415M 2.9G 13% /home
tmpfs 565M 0 565M 0% /run/user/54321
tmpfs 565M 0 565M 0% /run/user/1000

]$ ls -lh /boot
total 92M
-rw-r--r-- 1 root root 179K Dec 12 22:52 config-4.14.35-1844.0.7.el7uek.x86_64
drwx------ 3 root root 16K Dec 31 1969 efi
drwx------. 2 root root 21 Feb 8 15:55 grub2
-rw-------. 1 root root 54M Aug 28 12:31 initramfs-0-rescue-0287c4db206d4a9abe14f750b9091a01.img
-rw------- 1 root root 22M Dec 21 17:24 initramfs-4.14.35-1844.0.7.el7uek.x86_64.img
-rw-r--r-- 1 root root 329K Dec 12 22:52 symvers-4.14.35-1844.0.7.el7uek.x86_64.gz
-rw-r--r-- 1 root root 3.6M Dec 12 22:52
-rwxr-xr-x. 1 root root 6.1M Aug 28 12:31 vmlinuz-0-rescue-0287c4db206d4a9abe14f750b9091a01
-rwxr-xr-x 1 root root 7.2M Dec 12 22:52 vmlinuz-4.14.35-1844.0.7.el7uek.x86_64

I have no idea what is going on here and why the space keeps filling up and the VM crashing! ANY and all help will be greatly appreciated! Thanks!

I am running the following kernel:
Old 02-12-2019, 09:50 PM   #2
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Maybe you can spot something using ncdu or mc that ls -lh and df -h aren't showing you, possibly fonts or images in the /boot/grub2/ tree.


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