// usernames, hostnames and domain names modified to protect

ssh abc@xyzadmin1.domain.com:

ssh-keygen // no passphrase
...
Your identification has been saved in /home/abc/.ssh/id_rsa.
Your public key has been saved in /home/abc/.ssh/id_rsa.pub.
The key fingerprint is:...
The key's randomart image is:...

ssh-copy-id abc@xyzserver1.domain.com
ssh-copy-id abc@xyzserver2.domain.com

ssh abc@cephserver[1-2].domain.com and cat ~/.ssh/authorized_keys to check all is as expected

vi ~/.ssh/config
Host xyzserver1
        Hostname xyzserver1.domain.com
        User abc
Host xyzserver2
        Hostname xyzserver2.domain.com
        User abc

wget -q -O- 'https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc' | sudo apt-key add –
echo deb http://ceph.com/debian-cuttlefish/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
sudo apt-get update
sudo apt-get install ceph-deploy

// ping cephserver[1-5].domain.com

mkdir my-cluster
cd my-cluster
ceph-deploy new xyzserver1 xyzserver2				// ls and cat config, keyring and log files to see all is well

ceph-deploy install --stable cuttlefish xyzserver1 xyzserver2	// returns ok
ceph-deploy mon create xyzserver1 xyzserver2			// /var/lib/ceph on server nodes = subdirs bootstrap-mds/osd containing keyrings
ceph-deploy gatherkeys xyzserver1				// ~/my-cluster = ceph.client.admin.keyring, ceph.bootstrap-osd.keyring and ceph.bootstrap-mds.keyring

ceph-deploy disk list xyzserver1
ceph-deploy disk list xyzserver2
ceph-deploy disk zap xyzserver1:sdb
ceph-deploy disk zap xyzserver2:sdb
ceph-deploy disk zap xyzserver1:sdc
ceph-deploy disk zap xyzserver2:sdc
ceph-deploy disk zap xyzserver1:sdd
ceph-deploy disk zap xyzserver2:sdd

ceph-deploy osd prepare xyzserver1:sdb
ceph-deploy osd prepare xyzserver1:sdc
ceph-deploy osd prepare xyzserver1:sdd
ceph-deploy osd prepare xyzserver2:sdb
ceph-deploy osd prepare xyzserver2:sdc
ceph-deploy osd prepare xyzserver2:sdd

ceph-deploy osd activate xyzserver1:sdb1
ceph-deploy osd activate xyzserver1:sdc1
ceph-deploy osd activate xyzserver1:sdd1
ceph-deploy osd activate xyzserver2:sdb1
ceph-deploy osd activate xyzserver2:sdc1
ceph-deploy osd activate xyzserver2:sdd1

// Only run mds (metadata server) on one node!
ceph-deploy mds create xyzserver1