Steps to recreate

1. Do IntelliJ -> New Project -> Spring Initializer
   • Add Kotlin
   • Use Gradle Wrapper
   • Use SpringBoot2 WebFlux
   • Add DevTools
2. Add Application
   • JUnit
   • Add endpoints via @Bean, @RestController, router DSL
3. Docker container
   • Added Dockerfile from https://spring.io/guides/gs/spring-boot-docker/
   • Build locally docker build -t reactive-springboot .
   • Run locally docker run --rm -p 8080:8080 reactive-springboot:latest
4. Integrate with Google Cloud Container Builder
   • Example cloudbuild.yaml from https://github.com/GoogleCloudPlatform/cloud-builders
   • Add cloudbuild.yaml to enable the below command (which is the same as the command above)
   • Submit build gcloud container builds submit --config cloudbuild.yaml .
   • These operations appear to tarball current directory, so ./gradlew clean before might be a good idea
   • Setup Build trigger in GCP Container Registry and cloudbuild.yaml
5. Deploy to GKE
   • Create cluster gcloud container clusters create [CLUSTER-NAME]
   • Create deployment kubectl run rsb-deployment --image=gcr.io/talknerdy-one/reactive-springboot:latest --port 8080
   • Create service kubectl expose deployment rsb-deployment --type=LoadBalancer --port 80 --target-port 8080
6. Infra as code
   • Recreate deployment.yaml and service.yaml to match kubectl commands
   • Setup Cloud DNS
7. Cleanup
   • Delete service kubectl delete svc rsb-service
   • Delete cluster gcloud container clusters delete [CLUSTER-NAME]

Attach to Cassandra

1. Create keyspace and table in Cassandra cluster
   • Use cqlsh locally kubectl port-forward cassandra-0 9042
   • create keyspace rsb with replication = {'class':'SimpleStrategy', 'replication_factor':2};
   • use rsb;
   • create table users ( username text primary key, first text, last text, email text);
   • Do operations
   • insert into users (username, first, last, email) values ('bob', 'bob', 'smith', '[email protected]');
   • select * from users;
2. Forward port to cluster kubectl port-forward cassandra-0 9042
3. Edit the configuration via environment variable SPRING_DATA_CASSANDRA_CONTACT_POINTS=localhost

curl -X POST \
     http://localhost:8080/cass/ \
     -H 'cache-control: no-cache' \
     -H 'content-type: application/json' \
     -H 'postman-token: b1c68ff0-ab83-a51c-7611-e555beac725a' \
     -d '{"username":"joey", "first": "joey", "last": "doe", "email": "[email protected]"}'