gitlab - Fetch Dockerfile from script - docker

Question

We're using GITLAB CI/CD for deployment. This is the publish stage , Dockerfile is used here. If you check the script , I've integrated one environment variable(line no:10) , because we're using two jobs for publish itself like developer and stage. For that stage , I shown to you.
docker_build_stage:
stage: Publish
image: docker:19.03.11
services:
- docker:19.03.11-dind
variables:
IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA
script:
- docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
- docker build --build-arg environment_name=stage -t $IMAGE_TAG .
- docker push $IMAGE_TAG
only:
- /^([A-Z]([0-9][-_])?)?SPRINT(([-_][A-Z][0-9])?)+/i
- stage
This is the docker file , we're using.
FROM maven:3.8.3-jdk-11 AS MAVEN_BUILD
COPY pom.xml /build/
COPY src /build/src/
WORKDIR /build/
RUN mvn clean install package -DskipTests=true
FROM openjdk:11
WORKDIR /app
COPY --from=MAVEN_BUILD /build/target/provider-service-*.jar /app/provider-service.jar
ENV PORT 8092
ENV env_var_name=$environment_name
EXPOSE $PORT
ENTRYPOINT ["java","-Dspring.profiles.active="$env_var_name,"-jar","/app/provider-service.jar"]
In the dockerfile , at last line(line no:12) , we add environment variable(line no:10), before ,the variable should be
active=stage"
Because , we're maintaining respective branch as per the environment. Now, we merged developer and stage environment into single script. We are facing some fetching issue. Pipeline was successful but it doesn't fetch.

Answer 1

I did not completely understand what is the issue you are mentioning, but I see you are missing ARG instruction in Dockerfile which is required to define the build-arg that you are passing if you want to use it in the build stage, in this case this arg "$environment_name"
You might change it like this
FROM maven:3.8.3-jdk-11 AS MAVEN_BUILD
COPY pom.xml /build/
COPY src /build/src/
WORKDIR /build/
RUN mvn clean install package -DskipTests=true
FROM openjdk:11
ARG environment_name
WORKDIR /app
COPY --from=MAVEN_BUILD /build/target/provider-service-*.jar /app/provider-service.jar
ENV PORT 8092
ENV env_var_name=$environment_name
EXPOSE $PORT
ENTRYPOINT ["java","-Dspring.profiles.active="$env_var_name,"-jar","/app/provider-service.jar"]