Site for eduk8s hub.

TODO We find kapp to be a better tool than kubectl for deployment of your application in Kubernetes. If you have kapp installed, you can easily try this application:

kapp deploy -a hub -f ./k8s/deploy.yaml -y

ytt is a fantastic templating engine for Kubernetes that gives us a lot of flexibility. If you have ytt installed, you can easily customize your deployment:

ytt -f k8s | kapp deploy -y --diff-changes -a eduk8shub -f-

If you want to customize any of the possible values you can, either provide a values.yml file or provide specific values via command line:

ytt -f k8s --data-value-yaml namespace.name=eduk8shub | kapp deploy -y --diff-changes -a eduk8shub -f-

If you're in the building process, and you want to use the image you're building in the the deployment, kbld is your tool. If you have kbld installed, you can use it very easily:

ytt -f k8s --data-value-yaml namespace.name=eduk8shub  --data-value-yaml image.build=true | kbld -f - | kapp deploy -y --diff-changes -a eduk8shub -f-

If you want to build your container by compiling locally your java application (faster), use:

mvn package
ytt -f k8s --data-value-yaml namespace.name=eduk8shub  --data-value-yaml image.build=true --data-value-yaml dockerfile=docker/Dockerfile.innerloop | kbld -f - | kapp deploy -y --diff-changes -a eduk8shub -f-

If you don't have maven locally, or you want to build your application archive (.jar file) it in a container, use:

ytt -f k8s --data-value-yaml namespace.name=eduk8shub  --data-value-yaml image.build=true --data-value-yaml dockerfile=docker/Dockerfile.outerloop | kbld -f - | kapp deploy -y --diff-changes -a eduk8shub -f-

If you want to delete your application, it can be done in an easy command, anywhere:

kapp delete -a eduk8shub

There's 4 ways to build your container image:

• Build your application locally using maven and the SpringBoot Cloud Native Buildpacks (CNB).
• Build your application locally and then create the container image with a Docker multi-stage build. This will mostly be used for local development as it benefits from maven cache
• Build your application and container image with a Docker multi-stage build. This will be slower, but it doesn't depend on having maven installed.
• Build your application and image with a Buildpack

mvn package spring-boot:build-image
docker tag k8s/eduk8shub:cnb k8s/eduk8shub:latest

mvn package
docker build -t "k8s/eduk8shub:innerloop" -f docker/Dockerfile.innerloop .
docker tag k8s/eduk8shub:innerloop k8s/eduk8shub:latest

docker build -t "k8s/eduk8shub:outerloop" -f docker/Dockerfile.outerloop .
docker tag k8s/eduk8shub:outerloop k8s/eduk8shub:latest

mvn clean package spring-boot:build-image
docker tag docker.io/library/wildwest:1.0 k8s/eduk8shub:latest

Currently we have 2 profiles:

• development profile: application-default.yaml
• production profile: application.yaml

In development, we have the hub configuration in application-default.yaml although you can split configuration into multiple files and start your Boot application this way:

java -jar hub-0.0.1-SNAPSHOT.jar --spring.config.location=classpath:/application.yaml,classpath:/hub.yaml

Although in Kubernetes, you only need to place the files in file:./config/*/ and they will be automatically loaded