How to inject docker environment variable inside Spring boot application

Question

I am using dockerized images to run on AWS ECS containers.

dockerfile :

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} app.jar
EXPOSE 8080
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom", "-Dspring.profiles.active=${profile}","-jar","/app.jar"]`

Is it possible for me to fetch this variable inside my spring boot class?

Want to use this to set profiles inside my spring boot application.

Answer 1

You can set Enviroment Variables within Dockerfile after "FROM" line, like this:

ENV JAVA_BASE="/opt/java"

For each variables you need to add a new "ENV" line.