1 Introduction
The PostgreSQL on Amazon (AWS) service for SAP Business Technology Platform (SAP BTP) allows you to use a PostgreSQL database, hosted on Amazon Web Services (AWS) as the database for your Mendix app.
2 Binding PostgreSQL on Amazon (AWS)
2.1 Service Location in Developer Portal
The PostgreSQL on Amazon (AWS) service can be found and configured in three places within the Mendix Developer Portal.
2.1.1 Creating a New SAP App
You can choose the AWS RDS PostgreSQL-development standard database when you are creating your new SAP app.
2.1.2 Creating an SAP Environment for an App
You can choose the AWS RDS PostgreSQL-development standard database when you are creating an environment from the Environments page for your app in the Developer Portal.
2.1.3 Services Tab
PostgreSQL on Amazon (AWS) can also be found on the services tab of the environment details page of your app’s environment under aws-rds-postgresql.
2.2 Specifying the Configuration
Selecting PostgreSQL on Amazon (AWS) in one of the three places described above, will expand the entry to allow you to enter the name of the File which contains the configuration.
You will need to specify the File which contains the JSON to configure PostgreSQL on Amazon (AWS).
When you have specified the configuration, this will be bound to the app environment you are creating. If you are adding the service through the Services tab, you can click Connect Services to connect the PostgreSQL database to your app.
Many of the options for configuring PostgreSQL on Amazon (AWS) can be generated automatically. Mendix therefore provides you with a tool to help you create the correct configuration.
Click Open Editor or Configurator to start the PostgreSQL on Amazon (AWS) Configurator.
3 Using the PostgreSQL on Amazon (AWS) Configurator
The PostgreSQL on Amazon (AWS) configurator provide a user friendly interface to create the JSON required to configure PostgreSQL on Amazon (AWS).
The configurator will only create a JSON file from scratch. It does not have access to your existing database settings on SAP BTP, and you cannot import any existing JSON files.
The configurator has tooltips for each of the fields to explain what should be entered. Most of the fields can be left blank and the configurator will generate the information automatically.
The only two pieces of information you need to provide are:
- Resource Technical Name – The technical name of the AWS Resource Provider to use for provisioning the PostgreSQL RDS instance
- Backup Retention Period – The number of days for which automated backups for the instance are retained
You can also specify the Database Instance Type. The list of possible database types will change depending on whether you choose Development or Production. If you do not specify the database type, the configurator will choose a default depending on the environment type:
- Development –
db.t2.micro - Production –
db.m4.large
When you have entered all the information, you can do one of the following:
- Click Upload Configuration To Service to upload your database configuration directly to the PostgreSQL on Amazon (AWS) service.
- Click Download Configuration File to create a file containing the correct JSON for your database configuration. You can then upload this file as the configuration of your PostgreSQL on Amazon (AWS) service.