MCO concept

note.txt

MCO | MCC -> MC (Ignition configs, FIPS, kernel types, kernel args, etc)
    | MCD -> file management (one daemon for each node)
    | MCS -> Machine config server

Two types of Machine Configs: worker / master

For a cluster of 6 nodes(3 masters, 3 workers), in order to add a Machine Config
to change kernel type to RT kernel for workers:

Assuming three MC's are available in the cluster:
MC1 |
MC2 |-> rendered_config_1
MC2 |

Now we add a new MC4 for workers, and specify the kernel type to real time kernel, the 
cluster now have:
MC1 |
MC2 |-> rendered_config_2
MC3 |
MC4 |