Kubernetes: Difference between revisions
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* '''Cluster''' is a group of machines running Kubernetes | * '''Cluster''' is a group of machines running Kubernetes | ||
* '''Master''' is the system which contrals a cluster in with which one interacts. The master manages the cluster like load balancing, backup, replication, scheduling, ... | * '''Master System''' is the system which contrals a cluster in with which one interacts. The master manages the cluster like load balancing, backup, replication, scheduling, ... The master system is the '''control plane''' consisting of the components: | ||
* '''Nodes''' are the machines in a cluster. Each node has a container runtime such as [[Docker|Docker]]. A Node can host multiple Pods. | ** kube-apiserver: this is an API server that exposes the Kubernetes API | ||
** etcd: key-value store of the cluster data | |||
** kube-scheduler: monitors pods | |||
** kube-controller-manager: runs controller processes | |||
** cloud-controller-manager: embeds cloud-specific control logic | |||
* '''Nodes''' are the machines in a cluster. All nodes are called '''data plane'''. Each node has a container runtime such as [[Docker|Docker]]. A Node can host multiple Pods. A (worker) node comprises of: | |||
** kubelet: agent | |||
** kube-proxy: maintains network rules on nodes | |||
** container runtime | |||
* '''Pods''' is a logical group of containers on a node. | * '''Pods''' is a logical group of containers on a node. | ||
* Pods are wrapped as a Kubnetes '''Service'''. | * Pods are wrapped as a Kubnetes '''Service'''. | ||
* '''Volumees''' are used to store data | * '''Volumees''' are used to store data | ||
Latest revision as of 15:43, 7 February 2022
Concepts[edit]
- Cluster is a group of machines running Kubernetes
- Master System is the system which contrals a cluster in with which one interacts. The master manages the cluster like load balancing, backup, replication, scheduling, ... The master system is the control plane consisting of the components:
- kube-apiserver: this is an API server that exposes the Kubernetes API
- etcd: key-value store of the cluster data
- kube-scheduler: monitors pods
- kube-controller-manager: runs controller processes
- cloud-controller-manager: embeds cloud-specific control logic
- Nodes are the machines in a cluster. All nodes are called data plane. Each node has a container runtime such as Docker. A Node can host multiple Pods. A (worker) node comprises of:
- kubelet: agent
- kube-proxy: maintains network rules on nodes
- container runtime
- Pods is a logical group of containers on a node.
- Pods are wrapped as a Kubnetes Service.
- Volumees are used to store data