Master Components
- Components needed to deliver a functioning Kubernetes cluster.
- Master components make global decisions about the cluster (for example, scheduling), and they detect and respond to cluster events
Cluster A set of Nodes that run containerized applications managed by Kubernetes. For this example, and in most common Kubernetes deployments, nodes in the cluster are not part of the public internet.
Node A worker machine in Kubernetes, part of a cluster.
kube-apiserver
etcd
kube-scheduler
kube-controller-manager
cloud-controller-manager
Node Components
Common Terminologies
Service
A Kubernetes Service that identifies a set of Pods using label selectors. Unless mentioned otherwise, Services are assumed to have virtual IPs only routable within the cluster network
Cluster network
A set of links, logical or physical, that facilitate communication within a cluster according to the Kubernetes networking model
Edge router
A router that enforces the firewall policy for your cluster. This could be a gateway managed by a cloud provider or a physical piece of hardware.
Ingress
Rules for routing the Inbound traffic to cluster resources