option to create schema end exit process

[R-omk]

When installing a product, it need the ability to start migration job (scheme installation) and then complete the process. At the same time, for other modes, disable schema creation.

something like process_mode:
-reader (just for read api )
-writer ( for write only )
-migration (only create clickhouse schema and exit )

[lmangani]

Good logical points, let's make this happen.

[akvlad]

What do we need reader and writer process mode for?
They have different non-colliding api routes.

[R-omk]

What do we need reader and writer process mode for?

do it at your discretion, I simply use them separately, and each is configured with its own access to CH,
the reader will not be able to write even if we tries,
but it’s better if the reader doesn’t even try..

[akvlad]

Qryn operation Mode

since 3.2.23

MODE env var was introduced. It can have one of 3 values:

• writer - only writing paths
• reader - only reading paths
• init_only - initialize the database and exit
• all - reading and writing paths

[lmangani]

@R-omk this was implemented. Let us know if this fulfills your requirements and/or if you have comments.

Closing as completed, pending feedback.