zsiegel / kubernetes-example

A example java api deployed to kubernetes

Kubernetes Example

We will deploy the following

• A Java 8 webapp that uses the Vert.x framework
• A container that runs MySQL with a persistent volume
• A kubernetes cluster that uses secrets, volumes, deployments, and services

Walkthrough

Build the fat jar that will be copied into a docker container

gradle stage

Build the docker container

docker build -t zcorp-api:v1 zcorp-api/

Launch Minikube (a local kubernetes cluster)

minikube start --vm-driver=xhyve

Allow local Docker access

eval $(minikube docker-env)

Add secrets to cluster

kubectl apply -f kubernetes/secrets/

Add storage to cluster

kubectl apply -f kubernetes/volumes/

Deploy the service

kubectl apply -f kubernetes/services/

Deploy the pods

kubectl apply -f kubernetes/deployments/

Verify the service is working

minikube service zcorp

If the service is running it will return

{
  "env": "k8-zcorp",
  "now": "the current timestamp"
}

Verify the database is connected by visiting /healthz

If connected it will return

{
  "database": 1
}

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TODO Figure out a way to make minikube serve ingress on a different IP than the cluster IP so that the self signed certificate is presented instead of minikube temp cert

Verify SSL certificate setup using ingress

You must add ingress support to minikube

minikube addons enable ingress

Deploy ingress

kubectl apply -f kubernetes/ingress/