Ceph Cookbook

Mapping Ceph Block Device

Now that we have created a block device on a Ceph cluster, in order to use this block device, we need to map it to the client machine. To do this, execute the following commands from the client-node1 machine.

How to do it…

1. Map the block device to the client-node1:

   # rbd map --image rbd1 --name client.rbd
   

2. Check the mapped block device:

   # rbd showmapped --name client.rbd
   

   
3. To make use of this block device, we should create a filesystem on this and mount it:

   # fdisk -l /dev/rbd1
   # mkfs.xfs /dev/rbd1
   # mkdir /mnt/ceph-disk1
   # mount /dev/rbd1 /mnt/ceph-disk1
   # df -h /mnt/ceph-disk1

4. Test the block device by writing data to it:

   # dd ...