LVM root partition runs out of disk space.

Jacob-1 · 03-05-2018, 01:42 PM

Hi ,

we have LVM root partition runs out of disk space as you can see .
[root@test]$ df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/vg_or-lv_root
ext4 45G 35G 8.1G 82% /

my question I don't want to extend a root LVM partition , how to get access of the content to move all to the backup.
we are using Centos 6.9

syg00 · 03-05-2018, 03:35 PM

As it's mounted you already have access to the content.
Given your previous threads, you should be able to work out where the space is being consumed.

If you have them backed up, determine which files can be safely deleted and will return the most space, and delete them. If they are not backed up, do so immediately - plenty of options, some (most ?) of which have the option to delete after successful transfer. The deletion option needs to be used with care obviously.

jlinkels · 03-05-2018, 03:35 PM

The description of what you want is pretty terse.

Copying everything on the root partition is often done with rsync or clonezilla. In rsync you would use -x to copy only the root partition and not other partitions mounted below that. If it is the root partition you copy and intend to boot it from the new location you have to run grub-install.

I am surprised that you don't want to extend the LVM because that is the reason of LVM's existence, that you can expand logical volumes.

jlinkels

Jacob-1 · 03-05-2018, 03:56 PM

Hi syg00,jlinkels,

I think 45G for root is still a lot of space. If we have 82% of utilization, I would like to understand what is using that space. Root (/) is for the operational system only, not for user data. No Linux installation needs more than 5 GB of space;

you think there is way to know wish file have to much space and there location.

Thanks

syg00 · 03-05-2018, 04:16 PM

You mention "du" in another thread - use the appropriate options and reverse sort it. As you were advised. Then you'll know who are the major consumers - maybe logs, maybe users in /home.
You are apparently deliberately not providing enough info, so we can only give general answers.

SeaPhor · 03-16-2018, 05:39 PM

All the posts here point to what syg00 said- you need to provide more info-
Here is 'my' particular preference for an LVM setup- if you don't have segregated partitions like this then that is your real problem IMHO

Code:

Filesystem                 Mounted on
/dev/mapper/system-root    /
/dev/mapper/system-tmp     /tmp
/dev/mapper/system-var     /var
/dev/mapper/system-opt     /opt
/dev/mapper/system-varlog  /var/log
/dev/mapper/system-home    /home
/dev/mapper/system-srv     /srv