telepresence-k8s

Sample project to show integration between telepresence and the Java Kubernetes Client from fabric8

Requirements

You need a running K8s cluster and install telepresence locally

Demo

Setting up Quote Of the Moment Service

kubectl run qotm --image=datawire/qotm:1.3 --port=5000 --expose

Basic profile

Using the basic profile, service disovery using K8S API is disable; The Ribbon client use the service host name directly:

qotm:
    ribbon:
        listOfServers: qotm:5000

You can run the service with telepresence by running

./telepresence-basic.sh

Once sprince has started, you can make a GET request locally:

curl localhost:8080/rest/quote/cesar

A quote for cesar: Nihilism gambles with lives, happiness, and even destiny itself!% 

Discovery profile

Using the discovery profile, Ribbon will use io.fabric8.kubeflix.ribbon.KubernetesServerList to discover the list of server:

qotm:
  ribbon:
    NIWSServerListClassName: io.fabric8.kubeflix.ribbon.KubernetesServerList
    KubernetesNamespace: ${K8S_NAMESPACE:default}

You can run the service with telepresence by running

./telepresence-discovery.sh

This command uses the --mount command available from Telepresence 0.85 to access the k8s service account