fix: Pass MySQL env vars to Grafana for datasource setup

- Introduced `connectionConfigmapName` to optionally override the default ConfigMap name for better configurability.

Signed-off-by: kahirokunn <okinakahiro@gmail.com>

Author: kahirokunn

charts/devlake/templates/_helpers.tpl

@@ -105,8 +105,12 @@ The ui endpoint
 {{- end -}}
 
 {{- define "devlake.mysql.configmap" -}}
+{{- if .Values.option.connectionConfigmapName -}}
+{{- .Values.option.connectionConfigmapName -}}
+{{- else -}}
 {{ include "devlake.fullname" . }}-config
 {{- end -}}
+{{- end -}}
 
 {{- define "devlake.ui.auth.secret" -}}
 {{- if .Values.ui.basicAuth.secretName -}}

charts/devlake/values.yaml

@@ -169,9 +169,13 @@ grafana:
     server:
       serve_from_subpath: "true"
       root_url: "%(protocol)s://%(domain)s/grafana"
-  #the secret name should be as same as .Values.option.connectionSecretName
+  # the Secret name should be the same as .Values.option.connectionSecretName
   envFromSecrets:
     - name: "devlake-mysql-auth"
+  # the ConfigMap name should be the same as .Values.option.connectionConfigmapName
+  extraEnvFrom:
+    - configMapRef:
+        name: "devlake-mysql-auth-config"
   #keep grafana timezone same as other pods, which is set by .Values.commonEnvs.TZ
   env:
     TZ: "UTC"
@@ -436,6 +440,9 @@ option:
   database: mysql
   # the existing k8s secret name of db connection auth. The secret name should be as same as .Values.grafana.envFromSecret
   connectionSecretName: "devlake-mysql-auth"
+  # Optional: override the ConfigMap name for non-sensitive DB envs used across components
+  # Default is a fixed name to align references from subcharts
+  connectionConfigmapName: "devlake-mysql-auth-config"
   autoCreateSecret: true
   # If true, the chart assembles DB_URL automatically for MySQL. Set to false
   # to disable auto-assembly and provide DB_URL yourself via `lake.envs` or