fix: upgrade to MLflow 3.3.2 with full compatibility fixes

- Upgrade mlflow image from 2.22.1 to 3.3.2-debian-12-r0
- Add MLFLOW_FLASK_SERVER_SECRET_KEY environment variable (required for MLflow 3.x with basic auth)
- Remove --dev flag (incompatible with --app-name in MLflow 3.x)
- Bump mlflow chart version 0.4.5 -> 0.4.7
- Update appVersion to 3.3.2

Tested successfully on local k3s cluster with mlflow server running without errors.
This resolves the server startup failures in CI.

Author: chris-sanders

applications/mlflow/charts/mlflow/Chart.lock

@@ -1,6 +1,6 @@
 dependencies:
 - name: replicated
   repository: oci://registry.replicated.com/library
-  version: 1.5.1
-digest: sha256:743ca58f2dbfd1408d98b10e27b95f55f5dff2cfc3020e14c707822a5d0f88e0
-generated: "2025-04-16T12:26:22.509901-04:00"
+  version: 1.8.0
+digest: sha256:3221c305cc2c7284ade24c125055434cd813f9107e05c36154668d2f7176055e
+generated: "2025-09-30T15:07:20.581924-05:00"

applications/mlflow/charts/mlflow/Chart.yaml

@@ -2,8 +2,8 @@ apiVersion: v2
 name: mlflow
 description: A Helm chart for MLflow - Open source platform for the machine learning lifecycle.
 type: application
-version: "0.4.5"
-appVersion: "2.22.1"
+version: "0.4.7"
+appVersion: "3.3.2"
 home: https://github.com/mlflow/mlflow/tree/master/charts/mlflow
 sources:
   - https://github.com/mlflow/mlflow/tree/master/charts/mlflow

applications/mlflow/charts/mlflow/values.yaml

@@ -41,7 +41,7 @@ mlflow:
     # -- Image repository
     repository: bitnamilegacy/mlflow
     # -- Image tag
-    tag: 2.22.1-debian-12-r1
+    tag: 3.3.2-debian-12-r0
     # -- Image pull policy
     pullPolicy: IfNotPresent
   # -- Pod Labels for the mlflow deployment
@@ -64,7 +64,9 @@ mlflow:
   # -- Extra environment variables in mlflow container
   env:
     # Extra environment variables sourced via ConfigMap
-    configMap: {}
+    configMap:
+      # Required for MLflow 3.x with basic auth enabled
+      MLFLOW_FLASK_SERVER_SECRET_KEY: "change-me-in-production"
     # ENV_NAME_1: value
     # ENV_NAME_2: value
 
@@ -251,7 +253,7 @@ mlflow:
     # -- Number of gunicorn worker processes to handle requests
     workers: 1
     # -- Extra arguments passed to the `mlflow server` command
-    extraArgs:
+    extraArgs: []
     # A prefix which will be prepended to the path of all static paths
     # - --static-prefix TEXT
     # Additional command line options forwarded to gunicorn processes
@@ -260,8 +262,7 @@ mlflow:
     # - --waitress-opts TEXT
     # Path to the directory where metrics will be stored
     # - --expose-prometheus /metrics
-    # If enabled, run the server with debug logging and auto-reload
-    - --dev
+    # Note: --dev flag cannot be used with --app-name in MLflow 3.x+
 
     # Basic authentication configuration,
     # for more information, please visit https://mlflow.org/docs/latest/auth/index.html#configuration

applications/mlflow/release/mlflow-chart.yaml

@@ -5,7 +5,7 @@ metadata:
 spec:
   chart:
     name: mlflow
-    chartVersion: 0.4.5
+    chartVersion: 0.4.7
   weight: 10
   helmUpgradeFlags:
     - --wait