.. ditaa:: 
           /------------------\         /-----------------\
           |    admin-node    |         |      node1      |
           |                  +-------->+ cCCC            |
           |    ceph-deploy   |         |    mon.node1    |
	   |                  |         |    osd.0        |
           \---------+--------/         \-----------------/
                     |
                     |                  /----------------\
                     |                  |      node2     |
                     +----------------->+ cCCC           |
                     |                  |     osd.1      |
                     |                  \----------------/
                     |
                     |                  /----------------\
                     |                  |      node3     |
                     +----------------->| cCCC           |
                                        |     osd.2      |
                                        \----------------/