Setup
Get Dockers

1. Download and install Dockers

Get and compile Kubernetes

1. git clone https://github.com/kubernetes/kubernetes.git
2. cd kubernetes
3. make

Start up the cluster

sudo hack/local-up-cluster.sh

Start a new terminal and get this tutorial

1. git clone https://github.com/randcode-generator/kubernetes_tutorial_1.git
2. cd kubernetes_tutorial_1
3. git submodule init
4. git submodule update

Build a new docker image for the negative number generator project

cd neg-num-generator
sudo docker build -t neg-num-gen:v1 .

Build a new docker image for the positive number generator project

cd ../pos-num-generator
sudo docker build -t pos-num-gen:v1 .

Run the following commands to create pods

kubectl create -f pos-num-pod.yaml
kubectl create -f neg-num-pod.yaml

Run the following commands to create services

kubectl create -f num-service.yaml

How to use
Get a list of services

kubectl get service

Look for the cluster ip and port for the service named num-service.

Open http://<cluster ip>:<port>

For example:
http://10.0.0.39:8082

You will a positive number. If you refresh, you will get another positive random number

To get negative numbers,

kubectl edit service num-service

Find the field called component. Change the pos-num to neg-num. Save and quit.

Restart your browser and open up http://<cluster ip>:<port>, you should see random negative numbers