Glossary & Kubernetes Commands¶
Glossary¶
- Pod - The smallest deployable unit in Kubernetes, containing one or more containers.
- Node - A worker machine in Kubernetes, can be virtual or physical.
- Cluster - A set of nodes running containerized applications managed by Kubernetes.
- Control Plane - Components that manage the Kubernetes cluster (API server, scheduler, etcd, controllers).
- kubelet - Agent running on each node that ensures containers are running.
- etcd - Key-value store used for cluster state.
- CNI (Container Network Interface) - Standard for configuring network interfaces in Linux containers.
- Service - Abstraction to expose applications running on a set of Pods.
- ConfigMap & Secret - Mechanisms for configuration and sensitive data management.
- Ingress - API object for managing external access to services.
Common Kubernetes Commands Cheat Sheet¶
| Command | Description |
|---|---|
kubectl get nodes |
List all nodes in the cluster |
kubectl get pods -A |
List all pods across namespaces |
kubectl describe pod <pod-name> |
Detailed pod information |
kubectl create -f <file.yaml> |
Create resources from YAML file |
kubectl apply -f <file.yaml> |
Apply or update resources from YAML file |
kubectl delete -f <file.yaml> |
Delete resources defined in YAML file |
kubectl logs <pod-name> |
View logs of a specific pod |
kubectl exec -it <pod-name> -- /bin/bash |
Exec into a running container |
kubectl get svc |
List services in the cluster |
kubectl get deployments |
List all deployments |
kubectl scale deployment <name> --replicas=N |
Scale a deployment to N replicas |
kubectl config view |
Show kubeconfig details |
kubectl cluster-info |
Display cluster information |