fix: Add explicit legacy format converting for config types

src/ai/backend/common/config.py

@@ -44,6 +44,23 @@ class BaseSchema(BaseModel):
     )
 
 
+class BaseConfigModel(BaseModel):
+    @staticmethod
+    def snake_to_kebab_case(string: str) -> str:
+        return string.replace("_", "-")
+
+    model_config = ConfigDict(
+        populate_by_name=True,
+        from_attributes=True,
+        use_enum_values=True,
+        extra="allow",
+        alias_generator=snake_to_kebab_case,
+    )
+
+    def to_legacy_format(self) -> Mapping[str, Any]:
+        return self.model_dump()
+
+
 etcd_config_iv = t.Dict({
     t.Key("etcd"): t.Dict({
         t.Key("namespace"): t.String,

src/ai/backend/common/types.py

@@ -1383,9 +1383,9 @@ def from_dict(cls, data: dict[str, Any]) -> Self:
         return cls(
             addr=addr,
             sentinel=data.get("sentinel"),
-            service_name=data.get("service_name"),
+            service_name=data.get("service-name"),
             password=data.get("password"),
-            redis_helper_config=data.get("redis_helper_config"),
+            redis_helper_config=data.get("redis-helper-config"),
             override_targets=override_targets,
         )
 

src/ai/backend/manager/api/ratelimit.py

@@ -94,7 +94,7 @@ async def init(app: web.Application) -> None:
     root_ctx: RootContext = app["_root.context"]
     app_ctx: PrivateContext = app["ratelimit.context"]
     redis_profile_target: RedisProfileTarget = RedisProfileTarget.from_dict(
-        root_ctx.config_provider.config.redis.model_dump()
+        root_ctx.config_provider.config.redis.to_legacy_format()
     )
     app_ctx.redis_rlim = redis_helper.get_redis_object(
         redis_profile_target.profile_target(RedisRole.RATE_LIMIT),

src/ai/backend/manager/cli/context.py

@@ -147,7 +147,7 @@ async def redis_ctx(cli_ctx: CLIContext) -> AsyncIterator[RedisConnectionSet]:
     loader = LegacyEtcdLoader(etcd, config_prefix="config/redis")
     raw_redis_config = await loader.load()
     redis_config = RedisConfig(**raw_redis_config)
-    etcd_redis_config = RedisProfileTarget.from_dict(redis_config.model_dump())
+    etcd_redis_config = RedisProfileTarget.from_dict(redis_config.to_legacy_format())
 
     redis_live = redis_helper.get_redis_object(
         etcd_redis_config.profile_target(RedisRole.LIVE),