Why do we need Kubernetes

Kubernetes: what can the tool do?

Kubernetes now plays a major role in software development - especially in agile projects. The Development, testing and deployment cycle (and all possible intermediate steps) is simplified by the container orchestration. Kubernetes makes it possible to easily move containers from one level to another and automate many work steps in the process.

The Scaling is an important factor - especially if you rent external cloud storage: Kubernetes can make perfect use of resources to save costs. Instead of letting machines that are currently not needed continue to run, Kubernetes can release these resources again and either use them for other tasks or simply not use them at all, which can save costs. Thanks to autoscaling, Kubernetes automatically ensures that it does not use more resources than are actually necessary. But also the other way around, fast scaling is extremely important: If you publish your software for the first time, it can sometimes not be possible to correctly estimate what the influx will look like. Kubernetes can quickly provide additional instances so that the system does not collapse when there is extremely high demand.

The advantage with Kubernetes is that you can easily access it Link multiple platforms together can. So it is z. B. possible to use the solution in a hybrid cloud. The system is then partly located on its own local servers and partly in a remote data center - i.e. the cloud. This possibility in turn increases the scalability even more: If more resources are needed, these can usually be booked quickly and easily with the cloud provider.

Finally, Kubernetes also helps developers with the overview to keep. Each container is clearly marked and information about the status of each individual instance is available. Version control is also part of Kubernetes. Updates can therefore also be tracked retrospectively. Publishing updates is one of the main advantages of the system: New versions can be rolled out in such a way that there is no downtime at all. To do this, pods are gradually changed instead of all at once. This applies both to the internal test version and to the release of new versions for end users.

Since Kubernetes configures many aspects of the orchestration independently, there are some pitfalls in the work. That is why Kubernetes is generally regarded as a safe system: failures rarely occur, and if a pod no longer works as planned, the Kubernetes master has direct knowledge of this and can replace the failure.