In order for our client to have access to Ceph FS, we need to configure the client for accessing the cluster and mounting Ceph FS. Let's review how this is done:

1. Check your client's Linux kernel version:

        root@client-node1 # uname -r

2. Create a mount point directory in which you want to mount the filesystem:

        # mkdir /mnt/cephfs

3. Get the keys for the client.cephfs user, which we created in the last section. Execute the following command from the Ceph monitor node to get the user keys:

        # ceph auth get-key client.cephfs

4. Mount Ceph FS using the native Linux mount call with the following syntax:

Syntax: # mount -t ceph <monitor _IP:Monitor_port>:/ <mount_point_name> -o name=admin,secret=<admin_user_key>

         # mount -t ceph ceph-node1:6789:/ /mnt/cephfs 
         -o name=cephfs,secret=AQAimbFZAFAVOBAAsksSA09rtD9+dVWoj0CDDA==

5. To mount Ceph FS more securely and avoid the admin key being visible in the command history, store the admin keyring as plain text in a separate file and use this file as a mount option for secretkey:

        # echo AQAimbFZAFAVOBAAsksSA09rtD9+dVWoj0CDDA== 
          > /etc/ceph/cephfskey
        # mount -t ceph ceph-node1:6789:/ /mnt/cephfs 
        -o name=cephfs,secretfile=/etc/ceph/cephfskey

6. To allow the Ceph FS mount during the OS startup, add the following lines in the /etc/fstab file on client-node1:

Syntax: <Mon_ipaddress>:<Monitor_port>:/ <mount_point> <filesystem_name> [name=username,secret=secretkey|secretfile=/<path/to/secretfile],[{mount.options}]

        # echo "ceph-node1:6789:/ /mnt/cephfs ceph 
          name=cephfs,secretfile=/etc/ceph/
               cephfskey,_netdev,noattime 0 0" >> 
          /etc/fstab

7. umount and mount the Ceph FS again to validate clean mount:

        # umount /mnt/cephfs
        # mount /mnt/cephfs

8. Perform some I/O on the Ceph Filesystem and then umount it:

        # dd if=/dev/zero of=/mnt/cephfs/file1 bs=1M count=1024
        # umount /mnt/cephfs