{"id":1495,"date":"2019-03-08T15:32:02","date_gmt":"2019-03-08T15:32:02","guid":{"rendered":"https:\/\/www.appservgrid.com\/paw93\/?p=1495"},"modified":"2019-04-06T00:22:18","modified_gmt":"2019-04-06T00:22:18","slug":"challenges-and-solutions-for-scaling-kubernetes-in-the-hybrid-cloud","status":"publish","type":"post","link":"https:\/\/www.appservgrid.com\/paw93\/index.php\/2019\/03\/08\/challenges-and-solutions-for-scaling-kubernetes-in-the-hybrid-cloud\/","title":{"rendered":"Challenges and Solutions for Scaling Kubernetes in the Hybrid Cloud"},"content":{"rendered":"

Introduction<\/h2>\n

Let\u2019s assume you\u2019re in business online: you have your own datacenter and a private cloud running your website. You\u2019ll have a number of servers deployed to run applications and store their data.<\/p>\n

The overall website traffic in this scenario is pretty constant, yet there are times where you expect traffic growth. How do you handle all this growth in traffic?<\/p>\n

The first thing that comes to mind is that you need to be able to scale some of your applications in order to cope with the traffic increase. As you don\u2019t want to spend money on new hardware, which you\u2019ll use only a few times per year, you think of moving to a hybrid cloud<\/a> set up.<\/p>\n

This can be a real time and cost saver. Scaling (parts of) your application to public cloud will allow you to pay for only the resources you use, for the time you use them.<\/p>\n

But how do you choose that public cloud, and can you choose more than one?<\/p>\n

The short answer is yes, you\u2019ll most likely need to choose more than one public cloud provider. Because you have different teams, working on different applications, having different requirements, one cloud provider may not fit all your needs. In addition, many organizations need to follow certain laws, regulations and policies which dictate that their data must physically reside in certain locations. A strategy of using more than one public cloud can help organizations meet those stringent and varied requirements. They can also select from multiple data center regions or availability zones, to be as close to their end users as possible, providing them optimal performance and minimal latency.<\/p>\n

Challenges of scaling across multiple cloud providers<\/h2>\n

You\u2019ve decided now upon the cloud(s) to use, so let\u2019s go back and think about the initial problem. You have an application with a microservice deployment architecture for your applications, running containers that need to be scaled. Here is where Kubernetes comes into play. Essentially Kubernetes is a solution which helps you manage and orchestrate containerized applications in a cluster of nodes. Although Kubernetes will help you manage and scale deployments, nodes and clusters, it won\u2019t help you easily manage and scale them across cloud providers. More on that later.<\/p>\n

A Kubernetes cluster is a set of machines (physical\/virtual), resourced by Kubernetes to run applications. Essential Kubernetes concepts that you need to understand for our purposes are:<\/p>\n