spring cloud data flow application properties / environment variables - spring

Question

Have a docker container running a single spring cloud data flow application. Up until version 2.7.2 of data flow, I was able to pass all the database url/username/password properties to the application by defining them as environment variables in the container.
The application has application.yml defined to fetch the properties from variables, like this:
appname:
datasource:
url: ${APP_DB_URL:jdbc:sqlserver://127.0.0.1:1433}
password: ${APP_DB_PASSWORD:D3faultP4ss!}
username: ${APP_DB_USER:sa}
As said previously these variables was able to be defined by just having them as env variables in the container, now this method doesn't seem to work anymore starting from data flow 2.8 upwards.
Setup is configured to automatically register the application to the spring cloud data flow after startup, with following logic
1st delete all old tasks
curl "http://localhost:9393/tasks/definitions/${APP_NAME}?cleanup=false" -o /dev/null -s -w "%{http_code}" -X DELETE
2nd delete all old applications
curl "http://localhost:9393/apps" -o /dev/null -s -w "%{http_code}" -X DELETE
3rd register application
curl "http://localhost:9393/apps/task/${APP_NAME}/${APP_VERSION}" -o /dev/null -s -w "%{http_code}" -X POST -d "uri=file%3A%2F%2Fapp%2F${APP_JAR}&force=true"
4th register task
curl "http://localhost:9393/tasks/definitions" -o /dev/null -s -w "%{http_code}" -X POST -d "name=${APP_NAME}&definition=${APP_NAME}"
APP_NAME, APP_VERSION and APP_JAR are env variables put into the container in the build phase.
The on schedule, daily, the job is triggered with the following call:
curl "http://localhost:9393/tasks/executions" -o /dev/null -s -w "%{http_code}" -X POST -d "name=${APP_NAME}&properties=deployer.${APP_NAME}.local.workingDirectoriesRoot%3D%2Fapp%2Flogs&arguments=--date%3D$(date --date='yesterday' +\%Y-\%m-\%d)+--range%3D${range}+--dataSource%3DApplication+SourceProperty"
As said, until 2.7.2 version this worked, now when trying to update to 2.8 or newer the application tries to connect to the default database url defined in the application.yml. How can I override these using env variables?
And obviously if there's a better way to do the auto registration of the app, all tips are appreciated.

Answer 1

Spring Cloud Data Flow 2.7.x used Spring Boot 2.3
Spring Cloud Data Flow 2.8.x used Spring Boot 2.4
There are changes to property names and the data source initialisation will override your configuration unless you disable autoconfiguration of datasources.
We suggest you move to latest Spring Cloud Data Flow and update your applications to Spring Boot 2.7.x
The you provide properties like:
app.<appname>.spring.datasource.url etc.