root: add primary-replica db router (#9479)

* root: add primary-replica db router

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* copy all settings for database replicas

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* refresh read replicas config, switch to using a dict instead of a list for easier refresh

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* add test for get_keys

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* fix getting override

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* lint

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* nosec

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* small fixes

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* fix replica settings

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* generate config: add a dummy read replica

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* add doc

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* add healthchecks for replicas

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* fix

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

* add note about hot reloading

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

---------

Signed-off-by: Jens Langhammer <jens@goauthentik.io>
Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>
Co-authored-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

scripts/generate_config.py

@@ -12,6 +12,9 @@ with open("local.env.yml", "w", encoding="utf-8") as _config:
             "secret_key": generate_id(),
             "postgresql": {
                 "user": "postgres",
+                "read_replicas": {
+                    "0": {},
+                },
             },
             "outposts": {
                 "container_image_base": "ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s",