Overview

• The application retrieves application specific properties from an external configuration defined in AWS AppConfig.
• No properties are defined in application.properties of the spring boot application. All required application properties are fetched from configuration defined in Aws AppConfig.
• Data Source bean is created using the properties which are fetched from external configuration defined in AWS AppConfig.
• Application details are fetched from the properties which are fetched from external configuration defined in AWS AppConfig.

Prerequisites

• Java 17.0 or more
• Maven
• MySQL database / any relational database
• AWS Account

Configure AWS Credentials

• Create an IAM user and generate access keys.
• Save the "Access Key" and "Secret Key" generated from access keys and configure them AWS profile in local environment/System using AWS CLI

Create an IAM role

• Create an IAM role "mtb-task-exec-role". Attach permissions to access "AWS AppConfig" in the created role.

Define application and its configuration in AWS App Config

• Login to aws console https://aws.amazon.com/console/
• Navigate to AWS App Config
• Create an application provide name “ExternalConfig”

• Create configuration profile “showcase_sbc_skills” in the above defined application

• Select "AWS AppConfig hosted configuration" in configuration definition
• Update application related properties in configuration profile using freeform configuration in “yaml” format

• Define an environment “local” within an application.

• Deploy the configuration defined in application to the above created environment.

• Once the deployment is completed, above details are used in java application and retrieve the properties