omit server name when created with config

README.md

@@ -78,12 +78,13 @@ To provision an MLflow tracking server, set:
 ```yaml
 mlflow:
   mode: create
-  tracking_server_name: your-tracking-server-name
   experiment_name: qc-cli-training
   registered_model_name: qc-cli-model
   register_trained_models: true
 ```
 
+In `create` mode, the CLI manages the tracking server name from `infra.stack_name`.
+
 To use an existing MLflow tracking server, set:
 
 ```yaml

src/commands/infra.py

@@ -77,7 +77,8 @@ def setup(
     if outputs.get("SageMakerRoleArn"):
         CONSOLE.print(f"[green]✓[/green] IAM role:  {outputs['SageMakerRoleArn']}")
     if cfg.mlflow.mode is MlflowMode.create and outputs.get("MlflowTrackingServerArn"):
-        CONSOLE.print(f"[green]✓[/green] MLflow:    {outputs['MlflowTrackingServerArn']}")
+        mlflow_name = outputs.get("MlflowTrackingServerName", cfg.managed_mlflow_tracking_server_name)
+        CONSOLE.print(f"[green]✓[/green] MLflow:    {mlflow_name}")
     elif cfg.mlflow.mode is MlflowMode.existing:
         CONSOLE.print(f"[green]✓[/green] MLflow:    {cfg.mlflow.tracking_server_name}")
     CONSOLE.print("\n[bold green]Infrastructure ready.[/bold green]")
@@ -102,7 +103,7 @@ def status(config: str = CONFIG_OPT) -> None:
         if cfg.mlflow.mode is not MlflowMode.disabled:
             table.add_row(
                 "MLflow",
-                cfg.mlflow.tracking_server_name or "-",
+                cfg.effective_mlflow_tracking_server_name or "-",
                 "[red]unknown[/red]",
                 "-",
             )
@@ -126,7 +127,7 @@ def status(config: str = CONFIG_OPT) -> None:
     if cfg.mlflow.mode is MlflowMode.create:
         table.add_row(
             "MLflow",
-            cfg.mlflow.tracking_server_name or "-",
+            outputs.get("MlflowTrackingServerName", cfg.managed_mlflow_tracking_server_name),
             "[green]managed[/green]",
             outputs.get("MlflowTrackingServerArn", outputs.get("MlflowArtifactUri", "-")),
         )

src/config.py

@@ -1,5 +1,5 @@
 import re
-from enum import Enum
+from enum import StrEnum
 from typing import Any, Literal, TypedDict
 
 from mypy_boto3_s3.literals import BucketLocationConstraintType
@@ -7,13 +7,13 @@ from mypy_boto3_sagemaker.literals import TrainingInstanceTypeType
 from pydantic import BaseModel, Field, model_validator
 
 
-class MlflowMode(str, Enum):
+class MlflowMode(StrEnum):
     disabled = "disabled"
     create = "create"
     existing = "existing"
 
 
-class MlflowServerSize(str, Enum):
+class MlflowServerSize(StrEnum):
     small = "Small"
     medium = "Medium"
     large = "Large"
@@ -94,8 +94,8 @@ class MlflowConfig(BaseModel):
 
     @model_validator(mode="after")
     def require_tracking_server_name(self) -> "MlflowConfig":
-        if self.mode in {MlflowMode.create, MlflowMode.existing} and not self.tracking_server_name:
+        if self.mode is MlflowMode.existing and not self.tracking_server_name:
-            raise ValueError("mlflow.tracking_server_name is required when mlflow.mode is create or existing")
+            raise ValueError("mlflow.tracking_server_name is required when mlflow.mode is existing")
         return self
 
 
@@ -105,3 +105,15 @@ class Config(BaseModel):
     s3: S3Config = Field(default_factory=S3Config)
     sagemaker: SageMakerConfig = Field(default_factory=SageMakerConfig)
     mlflow: MlflowConfig = Field(default_factory=MlflowConfig)
+
+    @property
+    def managed_mlflow_tracking_server_name(self) -> str:
+        return f"{self.infra.stack_name}-mlflow"
+
+    @property
+    def effective_mlflow_tracking_server_name(self) -> str | None:
+        if self.mlflow.mode is MlflowMode.disabled:
+            return None
+        if self.mlflow.mode is MlflowMode.existing:
+            return self.mlflow.tracking_server_name
+        return self.managed_mlflow_tracking_server_name

src/infra/stack.py

@@ -74,6 +74,7 @@ class QCStack(Stack):
         CfnOutput(self, "SageMakerRoleArn", value=role.attr_arn)
 
         if config.mlflow.mode is MlflowMode.create:
+            tracking_server_name = config.managed_mlflow_tracking_server_name
             artifact_prefix = config.mlflow.artifact_prefix.strip("/")
             artifact_uri = (
                 f"s3://{data_bucket.bucket_name}/{artifact_prefix}/"
@@ -145,14 +146,14 @@ class QCStack(Stack):
                 "MlflowTrackingServer",
                 artifact_store_uri=artifact_uri,
                 role_arn=mlflow_role.attr_arn,
-                tracking_server_name=config.mlflow.tracking_server_name or "",
+                tracking_server_name=tracking_server_name,
                 automatic_model_registration=config.mlflow.automatic_model_registration,
                 mlflow_version=config.mlflow.mlflow_version,
                 tracking_server_size=config.mlflow.tracking_server_size.value,
                 weekly_maintenance_window_start=config.mlflow.weekly_maintenance_window_start,
             )
 
-            CfnOutput(self, "MlflowTrackingServerName", value=config.mlflow.tracking_server_name or "")
+            CfnOutput(self, "MlflowTrackingServerName", value=tracking_server_name)
             CfnOutput(self, "MlflowTrackingServerArn", value=tracking_server.attr_tracking_server_arn)
             CfnOutput(self, "MlflowArtifactUri", value=artifact_uri)
             CfnOutput(self, "MlflowRoleArn", value=mlflow_role.attr_arn)

src/tracking/mlflow.py

@@ -48,13 +48,14 @@ class MlflowTracker:
                 "Install with: qc-cli[mlflow]"
             ) from e
 
-        if not cfg.mlflow.tracking_server_name:
+        tracking_server_name = cfg.effective_mlflow_tracking_server_name
-            raise RuntimeError("mlflow.tracking_server_name is required when MLflow is enabled.")
+        if not tracking_server_name:
+            raise RuntimeError("MLflow tracking server name could not be resolved.")
 
         tracking_uri = aws_mlflow.get_tracking_server_arn(
             cfg.aws.region,
             cfg.aws.profile,
-            cfg.mlflow.tracking_server_name,
+            tracking_server_name,
         )
         mlflow.set_tracking_uri(tracking_uri)
         mlflow.set_experiment(cfg.mlflow.experiment_name)