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Kubernetes (also called K8s) is an open source system that allows deployment, rise and management of containered applications. This solution was first created by Google, which gave it to the Cloud Native Computing Foundation. This platform allows deployment automation, rise and implementation of application containers on clusters and servers. This open source software works with a whole range of container technologies, such as Docker, for example.

The Kubernetes architecture is shown in Figure 1.7. We can see Pods, which are containers or a group of containers hosted by servers that belong to a cluster of hardware. ETCD is the persisting storage unit for the cluster’s configuration data. The scheduler’s goal is to share the workload on servers, thus managing Pods’ execution in the best possible way. Finally, Kubelet is responsible for the execution state of each server.

Figure 1.7. Architecture of the Kubernetes orchestrator