feat(helm): Allow multi-database connection support (#34327)

Author: tadeha

helm/superset/Chart.yaml

@@ -29,7 +29,7 @@ maintainers:
   - name: craig-rueda
     email: craig@craigrueda.com
     url: https://github.com/craig-rueda
-version: 0.15.0 # See [README](https://github.com/apache/superset/blob/master/helm/superset/README.md#versioning) for version details.
+version: 0.15.1 # See [README](https://github.com/apache/superset/blob/master/helm/superset/README.md#versioning) for version details.
 dependencies:
   - name: postgresql
     version: 13.4.4

helm/superset/README.md

@@ -23,7 +23,7 @@ NOTE: This file is generated by helm-docs: https://github.com/norwoodj/helm-docs
 
 # superset
 
-![Version: 0.15.0](https://img.shields.io/badge/Version-0.15.0-informational?style=flat-square)
+![Version: 0.15.1](https://img.shields.io/badge/Version-0.15.1-informational?style=flat-square)
 
 Apache Superset is a modern, enterprise-ready business intelligence web application
 
@@ -203,6 +203,7 @@ On helm this can be set on `extraSecretEnv.SUPERSET_SECRET_KEY` or `configOverri
 | supersetNode.connections.db_name | string | `"superset"` |  |
 | supersetNode.connections.db_pass | string | `"superset"` |  |
 | supersetNode.connections.db_port | string | `"5432"` |  |
+| supersetNode.connections.db_type | string | `"postgresql"` | Database type for Superset metadata (Supported types: "postgresql", "mysql") |
 | supersetNode.connections.db_user | string | `"superset"` |  |
 | supersetNode.connections.redis_cache_db | string | `"1"` |  |
 | supersetNode.connections.redis_celery_db | string | `"0"` |  |

helm/superset/templates/_helpers.tpl

@@ -96,7 +96,18 @@ CACHE_CONFIG = {
 }
 DATA_CACHE_CONFIG = CACHE_CONFIG
 
-SQLALCHEMY_DATABASE_URI = f"postgresql+psycopg2://{env('DB_USER')}:{env('DB_PASS')}@{env('DB_HOST')}:{env('DB_PORT')}/{env('DB_NAME')}"
+
+if os.getenv("SQLALCHEMY_DATABASE_URI"):
+    SQLALCHEMY_DATABASE_URI = os.getenv("SQLALCHEMY_DATABASE_URI")
+else:
+    {{- if eq .Values.supersetNode.connections.db_type "postgresql" }}
+    SQLALCHEMY_DATABASE_URI = f"postgresql+psycopg2://{os.getenv('DB_USER')}:{os.getenv('DB_PASS')}@{os.getenv('DB_HOST')}:{os.getenv('DB_PORT')}/{os.getenv('DB_NAME')}"
+    {{- else if eq .Values.supersetNode.connections.db_type "mysql" }}
+    SQLALCHEMY_DATABASE_URI = f"mysql+mysqldb://{os.getenv('DB_USER')}:{os.getenv('DB_PASS')}@{os.getenv('DB_HOST')}:{os.getenv('DB_PORT')}/{os.getenv('DB_NAME')}"
+    {{- else }}
+    {{ fail (printf "Unsupported database type: %s. Please use 'postgresql' or 'mysql'." .Values.supersetNode.connections.db_type) }}
+    {{- end }}
+
 SQLALCHEMY_TRACK_MODIFICATIONS = True
 
 class CeleryConfig:

helm/superset/values.yaml

@@ -289,6 +289,8 @@ supersetNode:
       enabled: false
       ssl_cert_reqs: CERT_NONE
     # You need to change below configuration incase bringing own PostgresSQL instance and also set postgresql.enabled:false
+    # -- Database type for Superset metadata (Supported types: "postgresql", "mysql")
+    db_type: "postgresql"
     db_host: "{{ .Release.Name }}-postgresql"
     db_port: "5432"
     db_user: superset