Kubernetes is on the cutting-edge of scalable cloud technology. Originally developed and used in production by Google, the software was later donated to the Cloud Native Computing Foundation (CNCF) and is one of the highest-velocity projects in open source history.
To understand why Kubernetes is gaining popularity so quickly, it’s important to know what technology precedes it. Applications are traditionally built on a server with its own resources, like RAM and CPUs. It’s easy and affordable to manage only one server, which makes it an appealing method for many people. The downside is that if this server goes down, the entire application goes down with it. For online businesses, this translates into real money lost.
An easy solution to this problem would be to run more than one server for redundancy. However, to run multiple redundant servers adds to the initial and ongoing cost of running your application.
Kubernetes is an advanced solution that provides a highly-available, automatically scaling and self-healing platform for you to build your application on. Let’s break down each major component of Kubernetes.
- High Availability. Kubernetes clusters can be made highly-available. This means that if some servers that are hosting your application crash, other servers can pick up the workload resulting in zero downtime.
- Automatically Scaling. Kubernetes can automatically scale your cluster horizontally and vertically at the same time. In layman’s terms, Kubernetes can add more servers to your cluster when it’s needed. It can also remove servers when they are not needed, drastically reducing the overall hosting costs of your application. You only end up paying for the resources you use instead of paying to reserve all the resources you could potentially need.
- Self-Healing. Kubernetes can restart containers that have failed, replace containers, and kill containers that don’t respond to health checks.
These are only a few of the features of Kubernetes. Because of its complexity, many users opt to use a managed Kubernetes service such as the one offered by Linode. You can get started for free with a $100 credit by clicking on the link below.