env

README

About

Use simple CLI flags and environment variables to show how Kubernetes pods can be templated (e.g. Java maxHeap)
Becomes interesting when referencing reservations/ limits in ENV:

env:
      - name: HEAP  
        valueFrom:  
          resourceFieldRef:  
            resource: limits.memory

In case you want to play with the code (otherwise skip to "Run")

git clone https://github.com/embano1/gotutorials.git

Run (requires Kubernetes, e.g. minikube)

kubectl create -f https://raw.githubusercontent.com/embano1/gotutorials/master/env/pod.yaml and then check output with
kubectl logs env

If you don´t have Minikube running (or don´t want to install it)

Access the environment (from your browser)

Go to [http://labs.play-with-k8s.com] and get a virtual Kubernetes setup in your browser.

1. Initializes cluster master node:

 kubeadm init --apiserver-advertise-address $(hostname -i)


 2. Initialize cluster networking:

 kubectl apply -n kube-system -f \
    "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"


 3. (Optional) Initialize kube-dashboard:

 curl -L -s https://git.io/kube-dashboard  | sed 's/targetPort: 9090/targetPort: 9090\n  type: LoadBalancer/' | \
    kubectl apply -f -

Install some packages (in case you want to play with the code)

yum install git go
git clone https://github.com/embano1/gotutorials.git

Run

kubectl create -f https://raw.githubusercontent.com/embano1/gotutorials/master/env/pod.yaml and then check output with
kubectl logs env