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

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.
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
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.
Here 8081 is the Docker port and 8080 is the Tomcat port where is Spring Boot Application is running.

contact shrikarvk@gmail.com for more details and queries.

shrikarvk/SpringBootOnDocker

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