airbyte/docs/deploying-airbyte/integrations/database.md

External Database

For production deployments, we recommend using a dedicated database instance for better reliability, and backups (such as AWS RDS or GCP Cloud SQL) instead of the default internal Postgres database (airbyte/db) that Airbyte spins up within the Kubernetes cluster.

The following instructions assume that you've already configured a Postgres instance:

Secrets

apiVersion: v1
kind: Secret
metadata:
  name: airbyte-config-secrets
type: Opaque
stringData:
  # Database Secrets
  ## database-host: ## e.g. database.internla
  ## database-port: ## e.g. 5432
  ## database-name: ## e.g. airbyte
  ## database-user: ## e.g. airbyte
  database-password: ## e.g. password

Values

Add external database details to your values.yaml file. This disables the default internal Postgres database (airbyte/db), and configures your external Postgres database. You can override all of the values below by setting them in the airbyte-config-secrets or set them directly in the values.yaml file. The database password is a special case in that it must be set in the airbyte-config-secrets.

postgresql:
  enabled: false

global:
  database:
    # -- Secret name where database credentials are stored
    secretName: "" # e.g. "airbyte-config-secrets"

    # -- The database host
    host: ""
    # -- The key within `secretName` where host is stored 
    #hostSecretKey: "" # e.g. "database-host"

    # -- The database port
    port: ""
    # -- The key within `secretName` where port is stored 
    #portSecretKey: "" # e.g. "database-port" 

    # -- The database name
    database: ""
    # -- The key within `secretName` where the database name is stored 
    #databaseSecretKey: "" # e.g. "database-name" 

    # -- The database user
    user: "" # -- The key within `secretName` where the user is stored 
    #userSecretKey: "" # e.g. "database-user"

    # -- The key within `secretName` where password is stored
    passwordSecretKey: "" # e.g."database-password"