K8S Notes 9: Kubernetes Command Summary

After working through the previous articles, you should now have a basic understanding of Kubernetes. Below is a summary of some basic Kubernetes commands.

Cluster-related commands

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# View cluster information
$ kubectl cluster-info
Kubernetes master is running at https://192.168.233.128:6443
KubeDNS is running at https://192.168.233.128:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

Node-related commands

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# View all nodes
kubectl get nodes

# View detailed node information
kubectl describe node名称

Deployment-related commands

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# Create a deployment
kubectl create -f 部署yml文件

# Update the deployment configuration. For the initial deployment, this command is equivalent to kubectl create
kubectl apply -f 部署yml文件

# View existing deployments
kubectl get deployment

# Delete a deployment
kubectl delete deployment 部署名称

# View detailed deployment information
kubectl describe deployment 部署名称

# Perform a rolling scale-up. For example, increase the number of replicas to 8
kubectl scale --replicas=8 deployment/deployment名称

# Edit the deployment directly and update the manifest using Vim
kubectl edit deployment/deployment名称

# Restart a deployment
kubectl rollout restart deploy 部署名称 [-n namespace名称]

Service-related commands

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# Create a service and update its configuration in the same way as a deployment
# View existing services
kubectl get service
kubectl get svc

# Delete a service
kubectl delete service service名称

# View detailed service information
kubectl describe service service名称

Pod-related commands

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# View deployed Pods
kubectl get pod [-o wide]

# View detailed Pod information
kubectl describe pod pod名称

# View Pod logs; -f enables real-time updates
kubectl logs [-f] pod名称

# Enter a Pod container
kubectl exec -it pod名称 /bin/bash

NFS file sharing-related commands

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# When using NFS file sharing, verify that the file share was created successfully
exportfs

# On the host of a worker node, check whether the primary node's NFS file share is accessible
showmount -e 192.168.233.128

# Mount command for worker nodes
mount 192.168.233.128:/usr/local/data/www-data /mnt

# Automatically mount after a worker node restarts
# Add the following configuration to /etc/fstab
192.168.233.128:/usr/local/data/www-data /mnt nfs defaults 0 0