Dockerfile copy jar file from another directory-CodePudding

Ι have this Dockerfile:

FROM openjdk:11
ENV JAR_FILE=target/*.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

The structure of my application is:

Demo: 
 --deployment:
   --Dockerfile
 --src/
 --docker-compose.yaml
 --target:
   --app.jar

Code snippet from docker-compose file:

api:
 container_name: backend
 image: backend
 build:
   context: deployment/
 ports:
   - "8080:8080"

When I am putting the Dockerfile in the same directory with the docker-compose and I am changing the docker compose to:

api:
 container_name: backend
 image: backend
 build: .
 ports:
   - "8080:8080"

Is running as expected. But I want to put the Dockerfile into the deployment folder, since there I have the helm chart and others docker-comopose files which are using this Dockerfile.

My question is:

How I can specify the correct path of the target folder in the Dockerfile?

CodePudding user response：

You cannot copy anything which is out of the build context. If you want to keep the current project structure a solution would be in your compose file for the api service:

  build:
    context: .
    dockerfile: deployment/Dockerfile