gs-rest-service | RESTful Web Service : : Learn | REST library

According to spring boot application properties docs, you are able to set application properties by an environment variable. You should make env variable with the same name as a property name but if you use env variable, it's recommended to use '_' instead of '.'. For example if you want to set test.name you have to set TEST_NAME env argument.

In the first example, you set TEST_NAME env parameter in your docker file. When your application is starting, spring gets property from env variable (spring gets TEST_NAME, not NAME variable) and passes to the application, which replaces your default value "${name}". Please note here that spring not inject NAME variable, but replace property test.name by value from env variable.

In the second case, you haven't set BULK_API_USERNAME and BULK_API_PASSWORD env properties and spring doesn't replace default values and use ${API_USERNAME} and ${API_PASSWORD} as a properties value. You should set BULK_API_USERNAME and BULK_API_PASSWORD for passing your values to the app.

And also leave the value of properties in application.properties are empty. 'bulk.api.username=' and 'bulk.api.password='