External config in Spring Boot application within Dockerfile

Question

I want to run this Dockerfile application:

FROM java:8-jre
ADD config/ /deploy/
COPY ./meta.std.1.0.1.jar /deploy/
CMD chmod +x ./deploy/meta.std.1.0.1.jar
CMD ["java","-jar","/deploy/meta.std.1.0.1.jar","metastore","spring.config.location=./config/metadata-server.yml"]
EXPOSE 3011

While running, it's not reading the metadata-server.yml values? Is this the correct way?

Answer 1

I think that you put the wrong path of metadata-server.yml

"spring.config.location=./config/metadata-server.yml"

I think that after:

ADD config/ /deploy/

the path of metadata-server.yml should be:

"spring.config.location=/deploy/config/metadata-server.yml"

Answer 2

Use

FROM java:8-jre
ADD config/ /deploy/
COPY ./meta.std.1.0.1.jar /deploy/
CMD chmod +x ./deploy/meta.std.1.0.1.jar
CMD ["java","-jar","/deploy/meta.std.1.0.1.jar","metastore","--spring.config.location=classpath:file:/deploy/metadata-server.yml"]
EXPOSE 3011

Update:

Or better try this

FROM alpine:edge

VOLUME /tmp

RUN apk --no-cache upgrade && apk --no-cache add openjdk8-jre

ADD config/ /deploy/
COPY ./meta.std.1.0.1.jar /deploy/
ADD /YOUR/CONFIG/metadata-server.yml /deploy/metadata-server.yml

EXPOSE 3011

ENTRYPOINT ["java" ,"-Djava.security.egd=file:/dev/./urandom --spring.config.location=classpath:file:/deploy/metadata-server.yml","-jar","/deploy/meta.std.1.0.1.jar"]