This guide walks you through the process of building a Docker image for running a Spring Boot application.
prerequisites: 1. Java 1.8 or above 2. Latest version of Gradle or Maven 3. Latest version of Docker 4. If you are NOT using a Linux machine, you will need a virtualized server. Visit https://www.virtualbox.org/wiki/Downloads for Download and install
Follow the below steps in sequence.
NOTE: if any of the below commands fail with the permission denied error in Linux env, prefix to each cmds to run the cmds in root
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if you are using maven, execute the below cmd to buid and start Spring Boot application-
$ ./mvnw package && java -jar target/spring-boot-docker-0.1.0.jar -
if you are using gradle, execute the below cmd to buid and start Spring Boot application-
$ ./gradlew build && java -jar build/libs/gs-spring-boot-docker-0.1.0.jar -
Nevigate to http://localhost:8080[localhost:8080] to see your "Hello Docker World" message.
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To Containerize the Hello World Application (Refer the Dockerfile for details) run the cmds below which will build a Docker image in the name mydocker/spring-boot-docker:latest
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if you are using maven, execute the below cmd -
$ ./mvnw install dockerfile:build -
if you are using Gradle, execute the below cmd -
$ ./gradlew build docker -
Run the docker image with the below cmd
$ docker run -p 8081:8080 -t mydocker/spring-boot-docker -
Nevigate to http://localhost:8081[localhost:8081] to see your "Hello Docker World" message.
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Here 8081 is the Docker port and 8080 is the Tomcat port where is Spring Boot Application is running.
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