README.md

04 - Tilt

The inner development loop on Kubernetes requires several steps: compiling the application, building the image, loading it to the cluster, and deploying it. We'll automate it with Tilt.

Let's use a local cluster provisioned with kind.

cd ..
./create-cluster.sh

Basic

Navigate to the basic folder.

cd 04-tilt/basic/book-service

Run Tilt to start the automated inner development loop on Kubernetes.

tilt up

Now you can work with the application, save your changes, and they will be automatically loaded into the container running in Kubernetes. You can also debug it by attaching a remote debugger from your IDE to the Pod.

The Tilt setup in the Tiltfile is tuned to work with Visual Studio Code without any additional configuration.

If you use IntelliJ IDEA, refer to the official documentation to enable live reload in the IDE. You also need to update the Tiltfile and change the folders monitored by Tilt for the live reload functionality. For more information on how it works, refer to the Paketo official documentation.

custom_build(
    # Name of the container image
    ref = 'book-service',
    # Command to build the container image
    # On Windows, replace $EXPECTED_REF with %EXPECTED_REF%
    command = './gradlew bootBuildImage --imageName $EXPECTED_REF',
    # Files to watch that trigger a new build
    deps = [ 'build.gradle', './build/classes/java/main', './build/resources/main' ],
    # Enables live reload
    live_update = [
        sync('./build/classes/java/main', '/workspace/BOOT-INF/classes'),
        sync('./build/resources/main', '/workspace/BOOT-INF/classes')
    ]
)

Clean-up

When you're done, delete the cluster as follows.

cd ../../..
./destroy-cluster.sh