from zero to reactive cloud micro hero

Using java spring-boot reactive webflux r2dbc docker compose docker swarm and k8s kubernetes

Status

IN PROGRESS

• Configured Travis CI pipelines
• Initialized draft and implement of VuePress documentation
• Implemented step1 with sets of spring boot 2.2.o.RELEASE reactive applications
• Implemented step2 with replacing in-memory map DBs -> r2dbc-postgres spring-data integration (run pg in docker)
• Implemented step3 and Dockerize all applications using fabric8.io maven plugin
• Implemented step4 and Dockerize multi-module application using fabric8.io maven plugin (all in one)
• Implemented step5 with docker-compose maven plugin
• Implemented step6 and Dockerize all applications using jib maven plugin from Google
• Implemented step7 with docker-swarm
• Implemented step8 with k8s and skaffold
• Implemented step9 with k8s and helm-chart
• Implemented stepX with project riff

Step 1

Simple sets of applications implementation for local run

./mvnw -DskipTests

java -jar step1-speakers-rest-api-service/target/*.jar
java -jar step1-sessions-rsocket-service/target/*.jar
java -jar step1-frontend/target/*.jar

#http :8082/speakers name=max
#http :8082/speakers name=bax
#http :8082/speakers
http :8080

Step 2

Simple sets of r2dbc applications with postgres (in docker)

#./mvnw -pl :step2-docker docker:start
docker stop pg || true ; docker run --rm --name pg -p 5432:5432 postgres:alpine

./mvnw

java -jar step2-speakers-rest-api-service/target/*.jar
java -jar step2-sessions-rsocket-service/target/*.jar
java -jar step2-frontend/target/*.jar

#http :8084/sessions name=maximum speakers=max
#http :8084/sessions

#http :8085/speakers name=max
#http :8085/speakers

http :8083

#./mvnw -pl :step2-docker docker:stop
docker rm -f -v pg

Step 3

An applications in docker using fabric8.io maven plugin

./mvnw -pl :step3-postgres-fabric8 docker:build docker:start
./mvnw -pl :step3-sessions-rsocket-service-fabric8,:step3-speakers-rest-api-service-fabric8,:step3-frontend-fabric8 clean package docker:build docker:start

#http :8087/sessions name=maximum speakers=max
#http :8088/speakers name=max
http :8086

./mvnw -pl :step3-speakers-rest-api-service-fabric8,:step3-sessions-rsocket-service-fabric8,:step3-frontend-fabric8 docker:stop docker:remove
./mvnw -f step3-postgres-fabric8/ docker:stop docker:remove

Step 4

Dockerized multi-module application using fabric8.io maven plugin (all in one)

./mvnw -f step4-all-in-one-fabric8 clean package -DskipTests
./mvnw -f step4-all-in-one-fabric8 -pl :step4-all-in-one-fabric8 docker:build docker:start

#http :8090/sessions name=maximum speakers=max
#http :8091/speakers name=max
http :8089

./mvnw -f step4-all-in-one-fabric8 -pl :step4-all-in-one-fabric8 docker:stop docker:remove

Step 5

Dockerized multi-module application using docker-compose maven plugin (all in one)

./mvnw -f step5-all-in-one-docker-compose -pl :step5-all-in-one-docker-compose docker:build docker:start
./mvnw -f step5-all-in-one-docker-compose
./mvnw -f step5-all-in-one-docker-compose -pl :step5-all-in-one-docker-compose docker:stop docker:remove

#./mvnw -pl :step5-all-in-one-docker-compose docker-compose:up

#http :8093/sessions name=maximum speakers=max
#http :8094/speakers name=max
http :8092

./mvnw -pl :step5-all-in-one-docker-compose docker-compose:down

Step 6

Dockerized multi-module application using jib maven plugin from Google and docker-compose maven plugin (all in one)

./mvnw -pl :step6-all-in-one-google-jib -P pg-start
./mvnw -f step6-all-in-one-google-jib compile jib:dockerBuild
./mvnw -pl :step6-all-in-one-google-jib -P pg-stop

./mvnw -pl :step6-all-in-one-google-jib -P compose-create
./mvnw -pl :step6-all-in-one-google-jib -P compose-up

#http :8096/sessions name=maximum speakers=max
#http :8097/speakers name=max
http :8095

./mvnw -pl :step6-all-in-one-google-jib -P compose-down

Step 7

Dockerized multi-module application using docker-swarm (all in one)

prepare docker-swarm

docker swarm init
docker service create --name registry --publish published=5000,target=5000 registry:2

run test postgres container for success tests during build

./mvnw -pl :step7-all-in-one-docker-swarm -P pg-start
./mvnw -f step7-all-in-one-docker-swarm compile jib:build
./mvnw -pl :step7-all-in-one-docker-swarm -P pg-stop

test with docker-compose

./mvnw -pl :step7-all-in-one-docker-swarm -P compose-create
./mvnw -pl :step7-all-in-one-docker-swarm -P compose-up

#http :8099/sessions name=maximum speakers=max
#http :8100/speakers name=max
http :8098

./mvnw -pl :step7-all-in-one-docker-swarm -P compose-down

docker stack deploy

docker stack deploy -c step7-all-in-one-docker-swarm/docker-compose.yml step7

#http :8100/speakers name=max                  | jq '.'
#http :8099/sessions name=maximum speakers=max | jq '.'
http :8098

docker stack rm step7
docker service rm registry
docker swarm leave -f

Version

./mvnw build-helper:parse-version versions:set -DnewVersion=\${parsedVersion.majorVersion}.\${parsedVersion.minorVersion}.\${parsedVersion.nextIncrementalVersion} -DgenerateBackupPoms=false

Cleanup

#docker rm -f -v `docker ps -aq`
for i in $(docker ps -aq) ; do docker rm -f -v $i ; done

#docker rmi -f `docker images -q --filter=dangling=true`
for i in $(docker images -q --filter=dangling=true) ; do docker rmi -f $i ; done

#docker rmi -f `docker images -q -f=reference='*/*step*'`
for i in $(docker images -q -f=reference='*/*step*') ; do docker rmi -f $i ; done

GitHub Pages

Documentation is located here

Resources

For further reference, please consider the following sections:

• GitHub: daggerok/k8s-nginx-ingress-example
• YouTube: Kubernetes Master Class: Kubernetes from Zero to Hero
• YouTube: k3s -- The Lightweight Kubernetes Distribution Built for the Edge
• Official Apache Maven documentation
• Spring Boot Maven Plugin Reference Guide
• Spring Configuration Processor
• Thymeleaf
• Handling Form Submission
• Error handling
• ServerWebExchange injection
• R2DBC db initialization
• Maven + Docker by using fabric.io
• Maven + Docker by using GoogleContainerTools/jib maven plugin
• Postgres on Docker Hub
• Docker cleanup: docker images -f "dangling=true"
• docker-compose-maven-plugin
• Spring Boot Google JIB
• Google JIB FAQ
• jib-maven-plugin
• YouTube: Speedy build for your java application images with JIB! by Mohammed Aboullaite
• No fat jars with jib
• Docker Swarm getting started guide
• Docker Swarm -> k8s
• YouTujbe: Deploying and scaling applications with Docker, Swarm, and a tiny bit of Python magic - PyCon 2016
• YouTube: Deploy and scale containers with Docker native, open source orchestration PyCon 2017
• Container Training
• k8s workshop