8/15/2023 0 Comments Control plane kubernetes![]() ![]() They play a crucial role in the functioning of the system, providing the computing resources that are needed to run the applications and hosting the pods that contain the applications. In Kubernetes, nodes are the worker machines in the cluster. It is responsible for managing the cloud-specific controllers that handle tasks such as creating and deleting cloud resources, and it provides a consistent interface for the other components of Kubernetes to interact with the cloud infrastructure. The cloud-controller-manager is an optional component of Kubernetes, and it is only used if the cluster is running on a cloud platform. The cloud-controller-manager is a component of the Kubernetes control plane that is responsible for interfacing with the underlying cloud infrastructure. They are commonly used for deploying pods that perform cluster-wide tasks, such as logging or monitoring. DaemonSet controllers: DaemonSet controllers ensure that a specific pod is running on every node in the cluster, or on a subset of nodes that match a certain label.They provide features such as persistent storage, unique network identities, and ordered deployment and scaling. ![]() ![]() StatefulSet controllers: StatefulSet controllers are similar to Deployment controllers, but they are designed specifically for managing stateful applications.If a pod fails or is terminated, the replication controller will create a new one to replace it. Replication controllers: Replication controllers ensure that a specified number of replicas of a pod (a group of one or more containers) are running at any given time.They are responsible for ensuring that the desired number of replicas are running and available, and they can be used to perform rolling updates of the application. Deployment controllers: Deployment controllers manage the deployment of a group of replicas of a containerized application.Some types controllers that are managed by the kube-controller-manager include: The kube-controller-manager is a component of the Kubernetes control plane that is responsible for managing the various controllers that handle tasks such as replicating containers and ensuring that the desired state of the cluster is maintained. This control plane process makes scheduling decisions while considering collective and individual resource requirements, affinity and anti-affinity specifications, inter-workload interference, data locality, deadlines, and hardware, software, or policy constraints. It is a highly available and consistent data store that provides a reliable way for the various components of Kubernetes to store and retrieve data about the cluster. etcdĮtcd is a distributed key-value store that is used by Kubernetes to store the configuration data for the cluster. It also provides an authentication and authorization layer for the cluster, ensuring that only authorized users and applications are able to access the API. The kube-apiserver is responsible for coordinating the various components of the cluster, and it provides the mechanisms for enforcing policies and ensuring that the desired state of the cluster is maintained. It is one of the key components of the Kubernetes control plane, and it exposes the Kubernetes API, which is used by external clients to interact with the cluster. The kube-apiserver is the central management point for a Kubernetes cluster. The Kubernetes control plane is the central management point for the cluster, and it consists of a number of different components that work together to manage the cluster and ensure that the desired state of the system is maintained. Image Source: Kubernetes Control Plane Components Pods are used to host the applications that run on the cluster, and they provide a way to manage the containers as a single entity. A pod is a group of one or more containers that are deployed together on the same node. Pods are the basic units of deployment in Kubernetes. These nodes are managed by the Kubernetes platform, which provides a way to automate the deployment, scaling, and management of the applications. A Kubernetes cluster is a group of machines, called nodes, that are used to run containerized applications. The Kubernetes architecture consists of various components that help manage clusters. Kubernetes Architecture and Components Explained Kubernetes Architecture and Components Explained. ![]()
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