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README.md

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+# 🎨 A Quick Intro to K8s 🎨
+
+In this guide I show you how to spin a quick ```Node.js``` server in kubernetes and to grasp some of its main concepts.
+
+### Install kubectl
+
+First you will need to install [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/) in your machine.
+
+Make sure you have all the auths right, for instance, I do the follow:
+
+1. Create a auth token and move to `~/.kube`
+2. Create a config file and move to `~/.kube`
+
+
+### Spinning up a Hello World node server in docker
+
+Download [this code](https://github.com/bt3gl/intro_to_k8s/tree/master/node_server_example) and build the image:
+
+```
+$ make build:
+```
+
+Now, just run the container:
+
+```
+$ make run
+```
+
+Which is:
+```
+docker build -t node_app_test .
+```
+
+Check whether the server is up:
+```
+$ make curl
+```
+
+Voilà!
+
+You can also check the status of your setup with:
+
+```
+$ make status
+```
+
+
+#### Other useful Docker commands
+
+Exec inside the container:
+
+```
+$ docker exec -i -t <container name from status> /bin/bash
+```
+
+Check images in disk:
+
+```
+$ docker images
+```
+
+
+### Pushing the Registry to Kubernetes
+
+In a real production system, we’ll want to build images in one place, then run these images in the Kubernetes cluster. 
+
+The system that images for distribution is called a **container registry**.
+
+
+Using a `yaml` Kubernetes files (for example, the one inside `node_server_example/`), you can now deploy the image with:
+
+```
+$ kubectl create -f  node_example_kube_config.yaml
+```
+
+After that, you are able to create the service with:
+
+```
+$  kubectl expose deployment node-app-test
+```
+
+Also, check out the service status with:
+
+```
+$ kubectl get services
+```
+
+### Clean up
+
+Removing the service and the deployment when you are done:
+
+```
+$ kubectl delete service node-app-test
+$ kubectl delete deployment node-app-test
+```
+
+
+
+## Useful General Commands
+
+Checking out pods:
+
+```
+$ kubectl get pods --namespace=<ns-name>
+```
+
+Checking deployments:
+
+```
+$ kubectl get deployments --namespace=<ns-name>
+```
+
+Checking services:
+
+```
+$ kubectl get services --namespace=<ns-name>
+```
+
+Get more information about a pod:
+
+```
+$ kubectl describe pod --namespace=<ns-name> <pod name>
+```
+
+
+
+## Some References:
+
+* [Dockerfiles good practices](https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/#general-guidelines-and-recommendations).
+
+
+----
+
+
+## License
+
+When making a reference to my work, please use my [website](http://bt3gl.github.io/index.html).
+
+<a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/4.0/88x31.png" /></a><br />
+
+This work is licensed under a [Creative Commons Attribution-ShareAlike 4.0 International License](http://creativecommons.org/licenses/by-sa/4.0/).
+

node_example_kube_config.yaml

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+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: node_app_test
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        run: node_app_test
+    spec:
+      containers:
+      - name: node_app_test
+        image: quay.etsycorp.com:443/mwahl/node_app_test:1.0
+        ports:
+          - containerPort: 1337
+      imagePullSecrets:
+      - name: <encrypted password from quqy>

node_server_example/Dockerfile

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+FROM node:4.4
+MAINTAINER "bt3" 
+
+EXPOSE 1337
+
+COPY server.js .
+
+CMD node server.js

node_server_example/Makefile

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+.DELETE_ON_ERROR:
+
+build:
+	docker build -t  node_app_test .
+
+run:
+	docker run -d -p 1337:1337 node_app_test
+
+curl:
+	curl localhost:1337
+
+status:
+	docker ps
+
+.PHONY: build run curl status

node_server_example/README.md

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+# Spinning up a Hello World node server in docker
+
+Build the image:
+
+```
+$ make build:
+```
+
+Run the container:
+
+```
+$ make run
+```
+    docker build -t  node_app_test .
+
+Check whether the server worked:
+```
+$ make curl
+```
+
+Check container's status:
+```
+$ make status
+```
+
+
+#### Other useful commands
+
+Exec inside the container:
+
+```
+$ docker exec -i -t <container name from status> /bin/bash
+```
+
+Check images in disk:
+
+```
+$ docker images
+```
+
+
+## Some References:
+
+* [Dockerfiles good practices](https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/#general-guidelines-and-recommendations).

node_server_example/node_example_kube_config.yaml

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+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: node_app_test
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        run: node_app_test
+    spec:
+      containers:
+      - name: node_app_test
+        image: node_app_test:1.0
+        ports:
+          - containerPort: 1337
+      imagePullSecrets:
+      - name: <encrypted password your container registry>

node_server_example/server.js

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+var os = require("os");
+var hostname = os.hostname();
+var http = require('http');
+var handleRequest = function(request, response) {
+	  console.log('Received request for URL: ' + request.url);
+	  response.writeHead(200);
+	  response.end("Hello from container " + hostname + "!\n\n");
+};
+var www = http.createServer(handleRequest);
+www.listen(1337);
+