Question 82127 in Docker Question posted in
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My spring boot application was running fine but when I dockerized it I got File not Found error

I don’t know what I’m getting this error when I dockerized my spring-boot application

this is my Dockerfile
enter image description here

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2

Answers


  1. 0

    In your Spring Boot application, from what I can see your BookingController is missing. Make sure you have the file present and build your image accordingly.

    For your Dockerfile, try to change add to ADD, as it seems your target files are not been copied into the image built.

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  2. 0

    First, I wonder is your application working on your IDE?

    Second, I think you make sure to build and package.
    It is not sure to exists a jar file in your target folder.
    You always have to build and check by yourself.

    Make the build process automatic.

    How about using this Dockerfile?

    FROM maven:3.8.6-openjdk-18-slim as MAVEN_BUILD

WORKDIR /build

COPY pom.xml .

RUN mvn dependency:go-offline

COPY src ./src

RUN mvn package -Dmaven.test.skip=true

FROM openjdk:18-alpine

WORKDIR /app

ARG JAR_FILE=*.jar

COPY --from=MAVEN_BUILD /build/target/${JAR_FILE} ./app.jar

EXPOSE 8080

CMD ["java", "-jar", "app.jar"]

    If maven or openjdk version not matched, check this site.

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