#WHAT IS KUBERNETES CLUSTER SOFTWARE#

From that point onwards, the kubelet is responsible for ensuring these containers are healthy and maintaining them according to the declarative configuration. The kubelet reads the details of the containers specified in the PodSpecs, pulls the images from the registry and runs the containers. When Kubernetes wants to schedule a pod on a specific node, it sends the pod’s PodSecs to the kubelet.

It allows the control plane to monitor the node, see what it is running, and deliver instructions to the container runtime.

#WHAT IS KUBERNETES CLUSTER SOFTWARE#

The kubelet is a software agent that runs on Kubernetes nodes and communicates with the cluster control plane. Here are the primary software components that run on every Kubernetes node: kubelet When a node fails or has insufficient resources to run a pod, the pod is evicted and rerun on another node. Each pod has a template that defines how many instances of the pod should run and on which types of nodes. The Kubernetes Scheduler, running on the master node, is responsible for searching for eligible worker nodes for each pod and deploying it on those nodes. A pod has its own IP, allowing pods to communicate with other pods on the same node or other nodes.

Pods are stateless by design, meaning they are dispensable and replaced by an identical unit if one fails. A pod includes one or more containers, and operators can attach additional resources to a pod, such as storage volumes. Workloads can be moved seamlessly between nodes in the cluster.Ī Kubernetes pod is the smallest unit of management in a Kubernetes cluster. When an application is deployed to the cluster, Kubernetes distributes the work across the nodes. Instead of managing specific physical or virtual machines, you can treat each node as pooled CPU and RAM resources on which you can run containerized workloads. A Kubernetes node is a single machine in a cluster that serves as an abstraction.

What is kubernetes cluster