Unwanted files present in "/var/lib/cinder" directory on Cinder Storage node

Issue

• Lot of files in the storage nodes are getting generated in the /var/lib/cinder directory

  
  [root@srv-os-ctl01 ~]# ls -al /var/lib/cinder/ | head -n 30
  total 12284
  drwxr-xr-x.  7 cinder cinder 10514432 Mar 12 09:37 .
  drwxr-xr-x. 57 root   root       4096 Jul  9  2018 ..
  -rw-------.  1 cinder cinder       10 Feb 12 22:50 .bash_history
  -rw-r--r--.  1 cinder cinder        0 Sep 29 11:25 cinder-0000a947-cff9-4ce3-a01d-30f754e37125-delete_volume
  -rw-r--r--.  1 cinder cinder        0 Apr  1  2018 cinder-00029f20-ae53-4b23-b292-f732af1ef122-delete_snapshot
  -rw-r--r--.  1 cinder cinder        0 Nov 15 21:32 cinder-0003c24e-cda0-443c-8399-e7cfca6e315f
  -rw-r--r--.  1 cinder cinder        0 Nov 15 21:45 cinder-0003c24e-cda0-443c-8399-e7cfca6e315f-delete_volum
  ...
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