,'''''''''''''''''''''''''''`.         ,'''''''''''''''''''''''''''`.
 |  ,______________________   |         |  ,______________________   |
 |  |                     |   |         |  |                     |   |
 |  | ,''''''''''''''''|  |   | DRBD    |  | ,''''''''''''''''|  |   |
 |  | |  CONTAINER 1a  |__|___|_________|__|_|  CONTAINER 2a  |  |   |
 |  | |                |  |   |heartbeat|  | |                |  |   |
 |  | '----------------'  |   |         |  | '----------------'  |   |
 |  | ,________________   |   |         |  | ,________________   |   |
 |  | |                |  |   |         |  | |                |  |   |
 |  | |  CONTAINER 1b  |  |   |         |  | |  CONTAINER 2b  |  |   |
 |  | |________________|  |   |         |  | |________________|  |   |
 |  |                     |   |         |  |                     |   |
 |  | ,''''''''''''''''|  |   |         |  | ,''''''''''''''''|  |   |
 |  | |  CONTAINER 1c  |  |   |         |  | |  CONTAINER 2c  |  |   |
 |  | |                |  |   |         |  | |                |  |   |
 |  |  `''''''''''''''''  |   |         |  |  `''''''''''''''''  |   |
 |  | ..................  |   | DRBD    |  | ..................  |   |
 |  | |                |__|___|_________|__|_|                |  |   |
 |  | |  CONTAINER 1db |  |   |heartbeat|  | |  CONTAINER 2db |  |   |
 |  | |________________J  |   |         |  | |________________J  |   |
 |  |                     |   |         |  |                     |   |
 |  | ,''''''''''''''`.   |   |         |  | ,''''''''''''''`.   |   |
 |  | |  CONTAINER 1e |   |   |         |  | |  CONTAINER 2e |   |   |
 |  | |_______________J   |   |         |  | |_______________J   |   |
 |  |   OVZ LAYER 1       |   |         |  |   OVZ LAYER 2       |   |
 |  L_____________________|   | DRBD    |  L_____________________|   |
 |   HARDWARE NODE 1     _____|_________|__ HARDWARE NODE 2          |
 L______________________ _____|heartbeatL____________________________J