Docker and Spring Boot on Windows 10 Home

This is my first blog post so please be gentle 😃

I recently attended the Belfast Java User Group Docker & Spring Boot in Practice talk by Hudson Mendes slides here.

I was going through some of the examples on a windows 10 home machine and here are some notes that might be useful to someone.  Note the instructions will likely be different on a different OS.

From an IDE e.g. Spring tool suite – create a workspace

Download and install docker toolbox (community version doesn’t work on Windows 10 home)

Connect to github https://github.com/hudsonmendes/belfastjug-sample-2

Switch to branch dockerfile in Spring tool suite git repository view

Copy files from HOME\git\hudsonmendes\belfastjug-sample-2 to workspace directory – note for dockerfile branch the folder must be called “api-example” that has build.gradle etc. in it.

From docker quick start terminal – cd to api-example directory

run “./gradlew eclipse” – this generates the eclipse files

Import existing project into spring tool suite if you want to view files etc.  The main files to look at are ApiExampleApplication.java (the Spring Boot application), build.gradle and Dockerfile.

From the same terminal, run “./gradlew bootRun” – this runs the sprint boot application normally (not in docker)

Browse to http://localhost:8080/meetups/belfastjug/live_now should get a “YES!”

CTRL-C to kill the app – confirm web link above no longer works

Run “./gradlew build” – this builds the “api-example-0.0.1-SNAPSHOT.jar” file in the build/libs folder

Run “docker build -t hudsonmendes/api-example .” – this builds the docker image

Run “docker images” – this should show the image

Run “docker run -p 8080:8080 hudsonmendes/api-example” – this runs the app in docker

There’s an issue with port forwarding in windows.  Run “docker-machine ip default” take a note of the IP address returned e.g. 192.168.99.100

Browse to Belfast JUG page on IP address from above e.g. http://192.168.99.100:8080/meetups/belfastjug/live_now should get a “YES!”

Run “docker ps” to view running images

Run “docker login” – enter your docker hub username and password (create one if you don’t have one)

Run e.g. “docker tag hudsonmendes/api-example USERNAME/api-example:0.1” to tag your image with your username and version

Run e.g. “docker push USERNAME/api-example:0.1” to push your image to docker hub

Browse to https://hub.docker.com/ to check the image is there

Run “docker stop CONTAINER_ID” to stop an image

Run “docker rmi –f IMAGE_ID” to remove an image