Kubernetes is a powerful container orchestration tool that helps manage and deploy containerized applications. Here are some essential Kubernetes commands with examples for your blog:
1. Basic Commands:
Create and manage resources:
- Create a Deployment:
kubectl create deployment nginx --image=nginx
- Scale Deployments:
kubectl scale deployment nginx --replicas=3
- Create a Service:
kubectl expose deployment nginx --port=80 --type=NodePort
- List Pods:
kubectl get pods
2. Pod Management:
Interacting with Pods:
- View Logs from a Pod:
kubectl logs <pod-name>
- Execute Commands in a Pod:
kubectl exec -it <pod-name> -- /bin/bash
- Copy Files to/from Pod:
kubectl cp /local/path <pod-name>:/pod/path
kubectl cp <pod-name>:/pod/path /local/path
3. Cluster Management:
Checking Cluster Status and Info:
- View Cluster Information:
kubectl cluster-info
- Show Nodes in the Cluster:
kubectl get nodes
- Describe a Resource:
kubectl describe pod <pod-name>
4. Resource Cleanup:
Deleting Resources:
- Delete a Deployment:
kubectl delete deployment nginx
- Delete a Service:
kubectl delete service nginx
- Delete a Pod:
kubectl delete pod <pod-name>
5. Resource Inspection:
Get and Filter Information:
- Get Detailed Resource Information:
kubectl get pods -o wide
- Filter Resources by Labels:
kubectl get pods -l key=value
- Show Resource YAML Configuration:
kubectl get deployment nginx -o yaml
6. Advanced Operations:
Advanced Kubernetes Operations:
- Apply Configuration from a YAML File:
kubectl apply -f filename.yaml
- Create a Namespace:
kubectl create namespace my-namespace
- Run a CronJob:
kubectl create -f cronjob.yaml
Include explanations, use cases, and scenarios where these commands are utilized. Highlight the importance of these commands for managing, monitoring, and scaling containerized applications within a Kubernetes cluster. Emphasize the significance of learning and understanding these commands for efficient Kubernetes management and application deployment.