feat: allow using external mongodb

Author: linonetwo

deploy/helm/templates/api-service/secrets.yaml

@@ -1,8 +1,12 @@
 {{- $nameSpace := include "lowcoder.namespace" . -}}
-{{- $mongoUser := first .Values.mongodb.auth.usernames -}}
-{{- $mongoPassword := first .Values.mongodb.auth.passwords -}}
-{{- $mongoServicename := .Values.mongodb.service.nameOverride -}}
+{{- $mongoUser := (and .Values.mongodb.auth.usernames (first .Values.mongodb.auth.usernames)) | default "" -}}
+{{- $mongoPassword := (and .Values.mongodb.auth.passwords (first .Values.mongodb.auth.passwords)) | default "" -}}
 {{- $lowcoderDatabase := first .Values.mongodb.auth.databases -}}
+{{- $mongoSecret := lookup "v1" "Secret" $nameSpace .Values.mongodb.auth.existingSecret | default dict -}}
+{{- $mongoSecretPassword := (index $mongoSecret.data "password" | default "" | b64dec) -}}
+{{- $mongoServicename := .Values.mongodb.service.nameOverride | default "" -}}
+{{- $externalUrl := .Values.mongodb.service.externalUrl -}}
+
 apiVersion: v1
 kind: Secret
 type: Opaque
@@ -18,7 +22,7 @@ stringData:
   {{- if .Values.mongodb.enabled }}
   LOWCODER_MONGODB_URL: "mongodb://{{ $mongoUser }}:{{ $mongoPassword }}@{{ $mongoServicename }}.{{ $nameSpace }}.svc.cluster.local/{{ $lowcoderDatabase }}?retryWrites=true&ssl=false"
   {{- else }}
-  LOWCODER_MONGODB_URL: {{ .Values.mongodb.externalUrl | quote }}
+  LOWCODER_MONGODB_URL: "mongodb://{{ $mongoUser }}:{{ $mongoSecretPassword }}@{{ $externalUrl }}/{{ $lowcoderDatabase }}?retryWrites=true&ssl=false"
   {{- end }}
   LOWCODER_DB_ENCRYPTION_PASSWORD: {{ .Values.global.config.encryption.password | default "lowcoder.org" | quote }}
   LOWCODER_DB_ENCRYPTION_SALT: {{ .Values.global.config.encryption.salt | default "lowcoder.org" | quote }}