2.3. Finding available storage devices (optional)

Procedure

1. List and verify the name of the worker nodes with the OpenShift Data Foundation label.

   $ oc get nodes -l=cluster.ocs.openshift.io/openshift-storage=

   Example output:

   NAME          STATUS   ROLES    AGE     VERSION
   bmworker01    Ready    worker   6h45m   v1.16.2
   bmworker02    Ready    worker   6h45m   v1.16.2
   bmworker03    Ready    worker   6h45m   v1.16.2

2. Log in to each worker node that is used for OpenShift Data Foundation resources and find the unique by-id device name for each available raw block device.

   $ oc debug node/<node name>

   Example output:

   $ oc debug node/bmworker01
   Starting pod/bmworker01-debug ...
   To use host binaries, run `chroot /host`
   Pod IP: 10.0.135.71
   If you don't see a command prompt, try pressing enter.
   sh-4.2# chroot /host
   sh-4.4# lsblk
   NAME                         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
   loop0                          7:0    0   500G  0 loop
   sda                            8:0    0   120G  0 disk
   |-sda1                         8:1    0   384M  0 part /boot
   `-sda4                         8:4    0 119.6G  0 part
   `-coreos-luks-root-nocrypt   253:0    0 119.6G  0 dm   /sysroot
   sdb                            8:16   0   500G  0 disk

   In this example, for bmworker01, the available local device is sdb.

3. Identify the unique ID for each of the devices selected in Step 2.

   sh-4.4#ls -l /dev/disk/by-id/  | grep sdb
   lrwxrwxrwx. 1 root root  9 Feb  3 16:49 scsi-360050763808104bc2800000000000259 -> ../../sdb
   lrwxrwxrwx. 1 root root  9 Feb  3 16:49 scsi-SIBM_2145_00e020412f0aXX00 -> ../../sdb
   lrwxrwxrwx. 1 root root  9 Feb  3 16:49 scsi-0x60050763808104bc2800000000000259 -> ../../sdb

   In the above example, the ID for the local device sdb

   scsi-0x60050763808104bc2800000000000259

4. Repeat the above step to identify the device ID for all the other nodes that have the storage devices to be used by OpenShift Data Foundation. See this Knowledge Base article for more details.