Create a diagram that reflects how a cluster's configuration is applied to instances

[andreyaksenov]

Product: Tarantool
Since: 3.0
Root document: https://docs.d.tarantool.io/en/doc/3.0/concepts/configuration/

Details

For example, the most simple diagram might look as follows:

Local:

 _________________ _________________ _____
|                 |                 |     |
| Server 1        | Server   2      | ... |
|_________________ _________________ _____|
| router          | router          |     |
|_________________ _________________ _____|
| storage         | storag          |     |
|_________________ _________________ _____|
| storage         | storage         |     |
|_________________ _________________ _____|
| ...             | ...             |     |
|_________________|_________________|_____|
|     ____________|     ____________|     |
|    |cluster.yaml|    |cluster.yaml|     |
|____|____________|____|____________|_____|

Config storage:

 _________________ _________________ _____
|                 |                 |     |
| Server 1        | Server   2      | ... |
|_________________ _________________ _____|
| router          | router          |     |
|_________________ _________________ _____|
| storage         | storage         |     |
|_________________ _________________ _____|
| storage         | storage         |     |
|_________________ _________________ _____|
| ...             | ...             |     |
|_________________|_________________|_____|
         |            |          
         |____________|
                      | 
              ________|___________________
             | Centralized config      |  |
             |_________________________|  |
             |                            |        
             |   Configuration storage    |
             |____________________________|

We can also show additional entities (replica set, cluster) and demonstrate how specific configuration options apply to different instance types (router, storage).

[p7nov]

For etcd, we can show possible ways to load the config: tt, TCM, manual (etcdctl?).

One more idea: draw a diagram for Configuration overview: how
groups, replicasets, and instances are organized and how parameter values from different levels are applied.

[andreyaksenov]

See also: https://www.mongodb.com/docs/manual/sharding/#sharded-cluster