Deployment

Goal: Circle CI to build a docker container from a uberJar generated with gradle.

The task is being approach in these steps:

• Gradle task to create uberjar
  • Using this gist as starting point
  • MyKong also helped
  • Append 'Kt' to file name as suggested in the Kotlin discussion forums
  • We're still missing META-INF/spring.factories in running time [6/12]
  • Add jpa datasource
  • Gradle has a task for it - bootRepackage
• Build the docker container
  • Created the Dockerfile
  • Followed sample from postgres
  • Spantree blog post on docker and tips to create a dockerfile.
  • Docker Compose in 12 minutes
  • Docker Getting Started and Docker-Compose getting started sections were fundamental to get a better grasp of the overall procedure.
  • This spring-boot-docker-mysql repo was a good source of knowledge for the whole task.
  • We start both containers (postgres and application) using docker run command.
    • For postgres we have: docker run --name database -p 8000:5432 -d postgres
    • For the application, we need to build the container: docker build -t application . and the start it: docker run -p 8080:8080 --link postgres:postgres -v ~/projects/demo:/usr/local/application-data -v ~/.gradle/:/root/.gradle/ application
  • The values in the application.properties file were updated to reflect the link address made available by the --link option in the docker run command
• Shell script
  • Calls the gradle tool inside the container to build the application from kotlin source
  • Executes the application