# Tổng hợp các câu lệnh hay dùng nhất Kubenetes | Kubernetes Cheat Sheet

Bài viết được mình sưu tầm với mục đích chia sẻ kiến thức cho mọi người, và không nhằm mục đích thương mại. Vì bài viết có nhiều từ tiếng anh chuyên môn nên mình sẽ để nguyên văn của tác giả để mọi người có thể hiểu dễ hơn.

## Cluster Management

1. Display endpoint details for the cluster’s master and services.
```bash
kubectl cluster-info
```

2. Show the Kubernetes version that is active on
the server and client
```bash
kubectl version
```

3. Get the cluster’s configuration
```bash
kubectl config view
```

4. List the available API resources
```bash
kubectl api-resources
```

5. List everything
```bash
kubectl get all --all-namespaces
```

## Node Management
1. List the nodes
```bash
kubectl get node
```

2. Update the taints on nodes
```bash
kubectl taint node <node_name>
```

3. Delete a node
```bash
kubectl delete node <node_name>
```

## Pod Management

1. List pods
```bash
kubectl get pod
```

2. Delete a pod
```bash
kubectl delete pod <pod_name>
```

3. See detailed state of a pods
```bash
kubectl describe pod <pod_name>
```

4. Create a pod
```bash
kubectl create pod <pod_name>
```

5. Run a command for a container inside a pod
```bash
kubectl exec <pod_name> -c <container_name> <command>
```

6. Get interactive shell on a pod
```bash
kubectl exec -it <pod_name> /bin/sh
```

7. See resource usage (CPU/Memory/Storage) for pods
```bash
kubectl top pod
```

8. Add/update the annotations of a pod
```bash
kubectl annotate pod <pod_name> <annotation>
```

9. Add/update the label of a pod
```bash
kubectl label pod <pod_name>
```

## Replication Controllers
1. View the list of replication controllers
```bash
kubectl get rc
```

2. View the list of replication controllers by namespace
```bash
kubectl get rc --namespace="<namespace_name>"
```

3. Scale a ReplicaSet
```bash
kubectl scale --replicas=<expected_replica_num> replicaset <name>
```

## Deployment Management

1. List the deployments
```bash
kubectl get deployment
```

2. Show the precise status of single or multiple deployments.
```bash
kubectl describe deployment <deployment_name>
```

3. Edit and update the deployment.
```bash
kubectl edit deployment <deployment_name>
```

4. Create a new deployment
```bash
kubectl create deployment <deployment_name>
```

5. Delete a deployment
```bash
kubectl delete deployment <deployment_name>
```

6. Check the rollout status of a deployment
```bash
kubectl rollout status deployment <deployment_name>
```

7. Display Resource usage (CPU/Memory/Storage) for nodes
```bash
kubectl top node
```

8. See resource allocation per node
```bash
kubectl describe nodes | grep Allocated -A 5
```

9. List the pods running on a node
```bash
kubectl get pods -o wide | grep <node_name>
```

10. To annotate a node
```bash
kubectl annotate node <node_name>
```

11. Add or update the labels of a node
```bash
kubectl label nodes <your-node-name> <label>
```

12. Scale a Deployment
```bash
kubectl scale deployment <deployment-name> --replicas=<number-of-replicas>
```

## Secrets

1. Create a secret
```bash
kubectl create secret <name>
```

2. List secrets
```bash
kubectl get secrets
```

3. View details about secrets
```bash
kubectl describe secrets <name>
```

4. Delete a secret
```bash
kubectl delete secret <secret_name>
```

## Services

1. List the services
```bash
kubectl get services
```

2. View the detailed state of a service
```bash
kubectl describe services <name>
```

3. Expose a replication controller, deployment or pod as a new Kubernetes service
```bash
kubectl expose deployment [deployment_name]
```

4. Edit/update the definition of a service
```bash
kubectl edit service <name>
```

## Common Options
Commands in Kubectl can include optional flags.
Here are a few examples of the most popular and helpful ones.

1. –o Format of output. (Suppose you wanted to list all of the pods in ps output format with additional information.)
```bash
kubectl get pods -o wide
```

2. Create any resource(pod/replicaset/deployment, etc) using a yaml/json file.
```bash
kubectl apply -f <xyz.yaml>
```

## Nội dung tham khảo
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