Glossar
| Name | Description |
|---|---|
| Node | A machine on which Kubernetes runs (either a physical or virtual server). Master / Control Plane: The master nodes are responsible for managing the Kubernetes control plane. They coordinate the cluster, provide the Kubernetes API, and handle all core management tasks. Worker Nodes: The worker nodes run the deployed applications and their associated resources. |
| Cluster | A cluster is a group of nodes that work together to provide high availability and fault tolerance in case one node fails. |
| Namespace | A namespace is like a project in Kubernetes. Different namespaces are isolated from each other at the network level but can communicate if explicitly allowed (similar to a firewall rule). It serves as a logical grouping for applications and resources. |
| Service (Networking) | A Service is a networking component that allows different Pods to communicate with each other and with the outside world. You can define input and output ports, as well as the communication protocol. |
| Ingress Controller | An Ingress Controller manages external access to Services within a cluster. It acts as a load balancer that distributes traffic across multiple Pods and handles routing based on defined Ingress rules. It also serves as a reverse proxy that manages TLS certificates and encryption. Having a proxy in front of the load balancer is a common setup in production environments. |
| Ingress (Networking) | An Ingress manages inbound HTTP(S) traffic to Services. You can define an FQDN, configure encryption (TLS), and specify routing rules to forward traffic to the appropriate Service. |
| Pod | The smallest deployable unit in Kubernetes — a Pod runs one or more containers that share the same network and storage. Init Container: Runs before the main container to perform setup tasks, such as database migrations. It stops once the initialization is complete. Sidecar Container: Runs alongside the main container to handle supporting tasks, such as logging, synchronization, or scheduled jobs. |