Kubernetes Commands Cheat Sheet

Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications. This comprehensive cheat sheet will guide you through various Kubernetes commands for interacting with clusters and managing resources.

Cluster Management:

Create a Cluster:

kubeadm init

Join a Node to the Cluster:

kubeadm join <control-plane-host>:<port> --token <token> --discovery-token-ca-cert-hash <hash>

Get Cluster Info:

kubectl cluster-info

Check Nodes in the Cluster:

kubectl get nodes

View Detailed Node Information:

kubectl describe node <node-name>

Check Kubernetes Events:

kubectl get events

Workloads:

Deploy an Application:

kubectl create deployment <deployment-name> --image=<image>

Expose a Deployment as a Service:

kubectl expose deployment <deployment-name> --port=<port> --type=<service-type>

Scale a Deployment:

kubectl scale deployment <deployment-name> --replicas=<replica-count>

Update a Deployment:

kubectl set image deployment/<deployment-name> <container-name>=<new-image>

Pods:

List Pods:

kubectl get pods

View Pod Logs:

kubectl logs <pod-name>

Exec into a Pod:

kubectl exec -it <pod-name> -- /bin/sh

Delete a Pod:

kubectl delete pod <pod-name>

Services:

List Services:

kubectl get services

Describe a Service:

kubectl describe service <service-name>

Expose a Port on Service:

kubectl port-forward service/<service-name> <local-port>:<service-port>

Configurations:

Get ConfigMaps:

kubectl get configmaps

Describe a ConfigMap:

kubectl describe configmap <configmap-name>

Create a Secret from File:

kubectl create secret generic <secret-name> --from-file=<file-path>

Monitoring and Troubleshooting:

Check Cluster Events:

kubectl get events

Get Component Status:

kubectl get componentstatus

Run Diagnostic on a Node:

kubectl describe node <node-name>

Run Diagnostic on a Pod:

kubectl describe pod <pod-name>

Check Cluster API Versions:

kubectl api-versions

This Kubernetes cheat sheet provides a starting point for managing clusters, deploying applications, and troubleshooting issues. Refer to the official Kubernetes documentation for in-depth information: Kubernetes Documentation.