KONG on premise with Control Plane and Data Plane

Hello all

I would like to hear from experts who have production ready setup in on premise Kong setup with Control Plane and Data Plane.
My initial setup is below
node is VM or bare-mental machine. Install Kong by docker compose
1 node for Control Plane , 4 node for Data Plane , 2 node for Postgres (Master/Standby)

a. How to differentiate is node is CP or DP in docker compose file for KONG ?
b. Do I need to set Postgres docker service name in all DP ?
c. May I know if Kong in DP nodes will communicate each other ?

Thank you

Hello all

Please share how to set up 1 CP and 4 DP and 2 Postgres DB. This is my initial setup in my development.
Please advise. Thank you