Currently I am running windows with docker for windows installed.
I have made a java application in Spring Boot that I want to build an image of and run in a docker container.
What am I doing wrong?
When I run the bellow and can see in my cmd prompt that the application starts and run. But there is no image in in docker and nothing running there.
#
# Build stage
#
FROM maven:3.8.4-openjdk-17 AS build
COPY src /test/src
COPY pom.xml /test
#RUN mvn -f /test/pom.xml clean package
RUN mvn -f /test/pom.xml clean package
#
# Package stage
#
FROM openjdk:17-alpine
COPY --from=build /test/target/test-0.0.1-SNAPSHOT.jar /usr/local/lib/test.jar
ENTRYPOINT ["java","-jar","/usr/local/lib/test.jar"]
What am I missing?
I have the application in a folder /test and the Dockerfile is also under /test. I go to this location in the cmd prompt and enter:
docker build -t testapp .
3
Answers
docker build will only build docker image
if you want to run the image in your docker try running the command
docker build builds a new image from the source code.
docker create creates a writeable container from the image and prepares it for running.
docker run creates the container (same as docker create) and runs it.
The command you are running,
docker build -t testapp ., only creates the docker image that you can check with the command someone stated in the comments :docker images -a.To run the image in a docker container you must use the run command :
docker run testapp. Then you will see the container in the Docker app.I was doing everything correct except for that when I thought the image was ready/built I run test of my java application that looked as the application had started.
By setting <maven.test.skip>true</maven.test.skip> I skipped the test and the build was finished. I got the image which I now can start. Thank you all for your question and assistance.