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.

   kubectl cluster-info
   

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

   kubectl version
   

3. Get the cluster’s configuration

   kubectl config view
   

4. List the available API resources

   kubectl api-resources
   

5. List everything

   kubectl get all --all-namespaces
   

Node Management

1. List the nodes

   kubectl get node
   

2. Update the taints on nodes

   kubectl taint node <node_name>
   

3. Delete a node

   kubectl delete node <node_name>
   

Pod Management

1. List pods

   kubectl get pod
   

2. Delete a pod

   kubectl delete pod <pod_name>
   

3. See detailed state of a pods

   kubectl describe pod <pod_name>
   

4. Create a pod

   kubectl create pod <pod_name>
   

5. Run a command for a container inside a pod

   kubectl exec <pod_name> -c <container_name> <command>
   

6. Get interactive shell on a pod

   kubectl exec -it <pod_name> /bin/sh
   

7. See resource usage (CPU/Memory/Storage) for pods

   kubectl top pod
   

8. Add/update the annotations of a pod

   kubectl annotate pod <pod_name> <annotation>
   

9. Add/update the label of a pod

   kubectl label pod <pod_name>
   

Replication Controllers

1. View the list of replication controllers

   kubectl get rc
   

2. View the list of replication controllers by namespace

   kubectl get rc --namespace="<namespace_name>"
   

3. Scale a ReplicaSet

   kubectl scale --replicas=<expected_replica_num> replicaset <name>
   

Deployment Management

1. List the deployments

   kubectl get deployment
   

2. Show the precise status of single or multiple deployments.

   kubectl describe deployment <deployment_name>
   

3. Edit and update the deployment.

   kubectl edit deployment <deployment_name>
   

4. Create a new deployment

   kubectl create deployment <deployment_name>
   

5. Delete a deployment

   kubectl delete deployment <deployment_name>
   

6. Check the rollout status of a deployment

   kubectl rollout status deployment <deployment_name>
   

7. Display Resource usage (CPU/Memory/Storage) for nodes

   kubectl top node
   

8. See resource allocation per node

   kubectl describe nodes | grep Allocated -A 5
   

9. List the pods running on a node

   kubectl get pods -o wide | grep <node_name>
   

10. To annotate a node

    kubectl annotate node <node_name>
    

11. Add or update the labels of a node

    kubectl label nodes <your-node-name> <label>
    

12. Scale a Deployment

    kubectl scale deployment <deployment-name> --replicas=<number-of-replicas>
    

Secrets

1. Create a secret

   kubectl create secret <name>
   

2. List secrets

   kubectl get secrets
   

3. View details about secrets

   kubectl describe secrets <name>
   

4. Delete a secret

   kubectl delete secret <secret_name>
   

Services

1. List the services

   kubectl get services
   

2. View the detailed state of a service

   kubectl describe services <name>
   

3. Expose a replication controller, deployment or pod as a new Kubernetes service

   kubectl expose deployment [deployment_name]
   

4. Edit/update the definition of a service

   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.)

   kubectl get pods -o wide
   

2. Create any resource(pod/replicaset/deployment, etc) using a yaml/json file.

   kubectl apply -f <xyz.yaml>
   

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