Docker is designed to help developers pack their applications into containers that include everything necessary for them to function, such as code, runtime, system libraries and system tools, to ensure they will always run the same, regardless of the environment they are launched in.

Web Relay Ingress with Docker for Mac Jan 8, 2018, by Karolis Rusenas Kubernetes became available in Docker for Mac 17.12 CE Edge. In the last year showed that it’s the most flexible and reliable option to run container workloads, all the major cloud providers now offer or are planning to offer a managed Kubernetes service to their customers: • • • • And some great companies that help you deploy and run your own cluster: • • • • After visiting last KubeCon in Austin I have seen a huge increase in the number of companies that specialize in Kubernetes consulting. This list could go on and on:) In this article we will: • Enable Kubernetes support in your Docker for Mac. • Create and deploy an example Node.js application. • Use Web Relay ingress controller to share that app running inside our Mac to the world:) Prerequisites: • Docker for Mac 17.12 CE Edge. • Webhook Relay and client command. • kubectl, the Kubernetes client command.

It should be included and configured by the Docker for Mac. If you are not using Mac or Docker for Mac you can still follow this tutorial step-by-step, just skip the “Enable Kubernetes in your Docker for Mac” section. This tutorial will work for ANY Kubernetes cluster as long as it has an Internet connectivity. Getting started Time to get our hands dirty! Feel free to skip a few things like enabling Kubernetes if you have already done it. Enable Kubernetes in your Docker for Mac To enable Kubernetes support inside your Docker for Mac, select Enable Kubernetes and click the Apply and restart button: It should take a bit of time depending on the available Internet bandwidth and once it is done, it should report that the installation is complete.

If you have any problems with this step, it might make sense to visit on this matter. Unlike Minikube, Docker for Mac doesn’t hijack kubectl context, so you have to set it. Docker build -t hello-node:v1. What is really nice about Docker for Mac with Kubernetes is that you can easily run locally built Docker images inside Kubernetes cluster.

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No need to change Docker daemons or push images to the public repositories just to test them out. Now Docker for Mac Kubernetes can run the image you built.

Create Deployment and Service Kubernetes checks on the health of the and restarts the Pod’s container if it terminates. Pod can consist of more than one containers but in this example we will only have one. Pis9izc72c1wd9i21gxqxm.webrelay.ioParameter –group webrelay-ingress is required to let our ingress controller know which tunnels it can manage. Note that users with paid plans can specify any custom subdomain (as long as it is not taken) without creating a tunnel first. This allows to just easily define ingress.yaml and ingress controller wil create a tunnel for it. We are only interested in this pis9izc72c1wd9i21gxqxm.webrelay.io (host) part. Every user gets a unique link to their tunnel.

Edit this code with your tunnel hostname and save it in a folder named hello with the filename ingress.yml. 58f26c61-8e42-45f4-a982-4cb70990d7e2 webrelay-ingress-pis9izc72c1wd9i21gxqxm.webrelay.io pis9izc72c1wd9i21gxqxm.webrelay.io default/hello-node/8080 off - 2 seconds Backends column should show // of the exposed service. You can access with your browser (just change the link to your own tunnel address). You can also use web UI at to view your ingresses: Wrapping up In this article we created, deployed and exposed an app to the Internet that is running locally on our laptops. Some people say that this is an “actual hello world” application and not just the usual “hello localhost”.

With Docker for Mac Kubernetes support it’s now a lot easier to develop and test our applications. Build locally, run locally and demo locally. I hope Web Relay ingress controller will serve you great in developing, testing and running your apps.

As always, if you have any questions, feel free to contact me.