[lmi] /var is 95% full

[Greg Chicares]

Vadim--It looks like this corporate RHEL server's /var is filling up:

$df
Filesystem                        1K-blocks     Used Available Use% Mounted on
devtmpfs                            8109384        0   8109384   0% /dev
tmpfs                               8123804        0   8123804   0% /dev/shm
tmpfs                               8123804    28384   8095420   1% /run
tmpfs                               8123804        0   8123804   0% 
/sys/fs/cgroup
/dev/mapper/VolGroup00-lv_root      4184064  1081108   3102956  26% /
/dev/mapper/VolGroup00-lv_usr       8378368  6681140   1697228  80% /usr
/dev/sda1                            999320   232676    697832  26% /boot
/dev/mapper/VolGroup00-lv_var       6805504  6403972    401532  95% /var
/dev/mapper/VolGroup00-lv_opt       4184064  1763004   2421060  43% /opt
/dev/mapper/VolGroup00-lv_home      2086912  1405344    681568  68% /home
/dev/mapper/VolGroup00-lv_tmp       4184064  1507152   2676912  37% /tmp
/dev/mapper/VolGroup00-lv_var_log   2086912   313536   1773376  16% /var/log
tmpfs                               1624764        0   1624764   0% 
/run/user/REDACTED
/dev/sdb1                          83843076 27848248  55994828  34% /srv/chroot

Apparently this uses LVM. Everything except /boot is XFS. We use
/var/cache to cache DEBs for the debian chroot, which total 2.5 GB.

They've given me two little drives. One is consumed by 4-GB partitions
for each of /usr, /var, /opt, and so on. The other, /dev/sdb1 above,
was unformatted, so I parted'd and mkfs.xfs'd it, and mounted it as
/srv/chroot.

Is it really trivial and completely safe to resize /var before it
runs out of space, given that I know nothing of LVM?

I think I should just store those DEBs on /dev/sdb1 somewhere.
But I figured I'd give you a chance to tell me that LVM makes
everything so easy that I should just resize /var .