Hopefully I want to make this changes without time downs, but if it has I need to plan a hour and date

You can make use of the HA Postgres. https://railway.app/template/ha-postgres

Check here: https://docs.railway.app/guides/postgresql#deploy-1

Yeah but I need a database that is synced in real time with my in another provider (as railway failed in the past). If I use that template is a bit the same problem

I'm not sure I understand what you mean. Please can you clarify better?

I need to install this:

The source database must have pglogical extension installed.
no pglogical extension installed on databases: postgres; railway

The source database 'wal_level' configuration must be equal to 'logical'.
wal_level should be set to logical instead of replica

To my existing postgres database that is running

I would highly recommend you use the HA Postgres template, by default it will deploy each replica into a different region, thus achieving your desired results.

More than that I need to replicate the postgres in another service outside railway just in case

Then you would need to create a Postgres image with those extensions installed / enabled.

Any image suggestion? Or a railway base image code and I can enable it changing it and having railway one as a base

Hi, I think you can just use any Postgres image on Dockerhub and build upon that.