Dear Friends,
I ran into a problem where my openstack machine ran out of space. My Logical FS /dev/mapper/centos-root was only 50GB and most of the space was lost.
Solution:
LVM
I Added a new 500GB HDD (sdb), created partition with parted (sdb1) and gave the below commands:
[root@stack opt]# pvcreate /dev/sdb1 Physical volume "/dev/sdb1" successfully created
Next Check your Volumes with “vgdisplay” command
[root@stack opt]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 3 Open LV 3 Max PV 0 Cur PV 1 Act PV 1 VG Size 465.27 GiB PE Size 4.00 MiB Total PE 119109 Alloc PE / Size 119109 / 465.27 GiB Free PE / Size 0 / 0 VG UUID TrvUI3-Xt7U-6vzF-5RtW-OfK0-OCOy-Tejrb6 --- Volume group --- VG Name cinder-volumes System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 5 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 20.60 GiB PE Size 4.00 MiB Total PE 5273 Alloc PE / Size 0 / 0 Free PE / Size 5273 / 20.60 GiB VG UUID 9LDtLm-52Un-1QJA-yc3q-13vE-LqEc-hX0kiU