Node
ELI5 — The Vibe Check
In Kubernetes, a Node is a physical or virtual machine in the cluster — one of the workers that actually runs your pods. If Kubernetes is a restaurant chain, nodes are the individual restaurant locations. Each node has a certain amount of CPU and memory, and Kubernetes figures out which pods to place where.
Real Talk
A Kubernetes Node is a worker machine (VM or physical server) that runs pods. Each node has a kubelet (agent communicating with the control plane), a container runtime (like containerd), and kube-proxy (for networking). The control plane schedules workloads onto nodes based on resource availability.
When You'll Hear This
"The node is out of memory — some pods got evicted." / "Add more nodes to the cluster to handle increased load."
Related Terms
Cluster
A Kubernetes Cluster is the whole system — all the nodes (machines) working together as one, managed by a control plane.
K8s (Kubernetes)
K8s is just a shorthand for Kubernetes — the name is 11 characters with 8 letters between K and s, hence K8s. It's the same big robot container manager.
Kubernetes
Kubernetes is a robot manager for your containers.
Orchestration
Orchestration is the process of automatically managing, coordinating, and scheduling where your containers run.
Pod
A Pod is the smallest thing Kubernetes manages — it's like a tiny apartment that one or more containers share.