Kubernetes is an open-source orchestration system that provides a platform for the automated deployment, scaling, and operation of application containers through clusters of hosts. It enables complete life-cycle management of containerized applications and services with methods that provide predictability, scalability, and high availability. Kubernetes was originally designed by Google and released in 2014. Today, Kubernetes is managed by the Cloud Native Computing Foundation.
As a Kubernetes user, you can choose how your applications should run and how they can interact with other applications or the outside world. You can scale your services up or down, perform smooth updates, and control traffic between different versions of your applications to test features or undo problematic deployments. Kubernetes provides interfaces and composable platform primitives to help you define and manage your applications with great flexibility, performance and reliability. Kubernetes hosting at servinga offers everything you need to deploy containerized applications.
The name Kubernetes comes from the Greek and means helmsman or pilot, and is the origin of the terms governor and cybernetic. Kubernetes is often simply abbreviated as K8s. The abbreviation was created by replacing the 8 letters “ubernated” with an “8”.
To put it simply, Kubernetes hosting at servinga provides you with the tools required to build and deploy reliable and scalable distributed applications. In modern architectures, a large number of services are provided over the network via APIs. These are delivered through distribution systems that run on multiple servers and configurations at different locations, and coordinate all their actions through network communication.
If you want to update an application the traditional way, you must either log in to a VM or an existing container and load the latest software binaries of your application, shut down, and restart the server. If errors occur during multiple updates, you have no record of how many updates you have deployed and when.
Kubernetes enables you to develop distributed systems that conform to the principles of immutable infrastructure. The immutable infrastructure creates an artifact that does not change as users change. Traditional methods have relied on introducing changes to existing objects upon incremental updates. Under such approach, the current state of the infrastructure cannot be represented as a single artifact, but as a collection of incremental updates and changes to that artifact itself.
If you want to upgrade your application in the immutable infrastructure of Kubernetes Hosting, just create a new container image with a new tag. As you deploy it, the old container with the old image version is deleted. In doing so, you always have an artifact record of what your actions, and you could easily return to the previous image should there be an error in your new container image.
With Kubernetes hosting, applications can be stored on the same computers without interfering with each other. This means that tasks from multiple users can be tightly packed on fewer machines. This advantage of Kubernetes hosting, in turn, increases efficiency and lowers hardware costs by reducing the number of machines used.
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When building micro-service architectures, multiple teams each work on a single service that is used by other teams for their service implementation. The summary of all these services finally provides the implementation of the entire product interface. Kubernetes offers numerous abstractions and APIs to make this possible. Pods or groups of containers can combine container images developed by different teams into a single triggerable unit. Kubernetes hosting offers load balancing, naming and discovery to isolate one micro-service from another. Kubernetes hosting namespaces provide isolation and access control, so that microservice can control degree of mutual interaction. Decoupling the application container image and the machine allows different micro-services in Kubernetes hosting to collocate on the same machine without disturbing each other, thus reducing the overhead and cost of micro-service architectures.
Everything in Kubernetes is a declarative configuration object that represents the desired state of the system. Kubernetes hosting is an alternative to the traditional imperative configuration, where the state of the system is defined by the execution of a series of commands. An example thereof would be the execution of three software replicas. Using the imperative configuration approach, the statement would “Run A, Run B, Run C”. In a declarative configuration, however, the corresponding statement is simply “replicate = 3”. The declarative configuration of Kubernetes Hosting allows to accurately describe the state of the system and is far less prone to errors. Furthermore, traditional development tools such as source code control, unit testing, and others can be used with declarative configurations, which is not possible with imperative configurations. That makes rollbacks with Kubernetes hosting a straightforward operation. In essence, imperative systems describe how to get from point A to point B, but seldom provide return instructions.