root@mgmt:~# ceph osd pool delete data data --yes-i-really-really-mean-it
Error EBUSY: pool 'data' is in use by CephFS
root@mgmt:~# ceph mds fail 0
root@mgmt:~# ceph fs rm cephfs --yes-i-really-mean-it
root@mgmt:~# ceph osd pool delete data data --yes-i-really-really-mean-it
pool 'data' removed
root@mgmt:~# ceph osd pool delete metadata metadata --yes-i-really-really-mean-it
pool 'metadata' removed
