/dev/mapper/centos-root is 100% full

[smarthosting]

My /dev/mapper/centos-root is mapped to / and is 99% full. This is causing issues with services crashing and the server becoming unstable. However, I am not sure why this keeps happening. /home is far from full, where all user data is stored.

df -h
[[email protected] ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 12G 0 12G 0% /dev
tmpfs 12G 0 12G 0% /dev/shm
tmpfs 12G 1.2G 11G 10% /run
tmpfs 12G 0 12G 0% /sys/fs/cgroup
/dev/mapper/centos_s22-root 50G 50G 929M 99% /
none 12G 6.5M 12G 1% /var/lve/dbgovernor-shm
/dev/sdb1 234G 194G 28G 88% /home5
/dev/sda2 1014M 178M 837M 18% /boot
/dev/sda1 200M 9.8M 190M 5% /boot/efi
/dev/mapper/centos_s22-home 413G 375G 39G 91% /home
/dev/loop0 2.2G 11M 2.1G 1% /tmp
tmpfs 2.4G 0 2.4G 0% /run/user/0


du -sch * --exclude=home

[[email protected] ~]# du -sch * --exclude=home
4.0K anaconda-ks.cfg
48K cldeploy
24K cloudlinux_ea3_to_ea4
276K cpanel3-skel
3.0M cptechs
436K error_log
4.0K install.log
8.0K install.sh
4.0K legacy_ea3_distiller_files-1573085122.tar.gz
4.0M maldetect-1.6.4
1.5M maldetect-current.tar.gz
8.0K mysql-community-release-el7-5.noarch.rpm
4.0K pclzip-5cc80afed42a9.gz
0 perl5
4.3M tmp
0 version.dat.old
14M total

 

[smarthosting]

lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
home centos_s22 -wi-ao---- 412.89g
root centos_s22 -wi-ao---- 50.00g
swap centos_s22 -wi-ao---- 11.81g

[[email protected] ~]# du -x / | sort -nr | head -20

78976184 /
40761084 /usr
36565520 /var
30401924 /usr/share
29450740 /usr/share/cagefs-skeleton
20312796 /usr/share/cagefs-skeleton/var
18706380 /var/lib
18457456 /usr/share/cagefs-skeleton/var/lib
18444908 /var/lib/mysql
18444908 /usr/share/cagefs-skeleton/var/lib/mysql
8313764 /var/log
7778240 /usr/local
7694784 /usr/local/cpanel
6090872 /usr/share/cagefs-skeleton/usr
5548212 /var/cpanel
4892248 /var/cpanel/bandwidth
4023668 /usr/local/cpanel/logs
3917068 /usr/share/cagefs-skeleton/usr/local
3573752 /usr/share/cagefs-skeleton/usr/local/cpanel
3108976 /usr/local/cpanel/logs/archive

[[email protected] ~]# lvs

LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
home centos_s22 -wi-ao---- 412.89g
root centos_s22 -wi-ao---- 50.00g
swap centos_s22 -wi-ao---- 11.81g

[[email protected] ~]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 475.9G 0 disk
├─sda1 8:1 0 200M 0 part /boot/efi
├─sda2 8:2 0 1G 0 part /boot
└─sda3 8:3 0 474.7G 0 part
├─centos_s22-root 253:0 0 50G 0 lvm /
├─centos_s22-swap 253:1 0 11.8G 0 lvm [SWAP]
└─centos_s22-home 253:2 0 412.9G 0 lvm /home
sdb 8:16 0 237.5G 0 disk
└─sdb1 8:17 0 237G 0 part /home5
loop0 7:0 0 2.2G 0 loop /var/tmp

 

[cPRex]

Hey there! / contains all data that isn't inside of another partition. Looking at your specific output, this would include areas like /usr, /var, /root, and other areas of the system outside of /home.

I like to use "du -h --max-depth 1" starting from /, and then working my way down through the directories until I find things I can remove.