[CentOS] /boot partition running out of space randomly. Please help!

[Sean Son]

On Tue, Feb 12, 2019 at 9:39 PM Rob Kampen <rkampen at kampensonline.com>
wrote:

> On 13/02/19 2:05 PM, Sean Son wrote:
> > Hello all
> >
> > First off, I am running Oracle Linux 7.6 on a Hyper-V 2016 VM for a
> > customer. I know this is not an Oracle Linux mailling list, but because
> > Oracle Linux and CentOS are so similar, to an extent, I figured why not
> ask
> > on here because someone MIGHT know the answer.. 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
> > System.map-4.14.35-1844.0.7.el7uek.x86_64
> > -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:
> > 4.14.35-1844.0.7.el7uek.x86_64
> My stab in the dark is that the system is trying to write a crash /
> rescue image and there is not enough space. du --max-depth 1 is useful too.
> >
> > Thanks!
> >
> > Sean S.
> > _______________________________________________
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> > CentOS at centos.org
> > https://lists.centos.org/mailman/listinfo/centos
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Hello Rob

Thank you for the reply. What do you recommend I should do to prevent the
crashing? Should I increase the /boot partition's disk space?  I am worried
that it will fill up again randomly like the current one is.. Should I
create a new /boot partition?


Thanks