Kubectl是一个命令行工具，用于在Kubernetes集群上执行命令。
kubectl 语法
使用以下语法从终端窗口运行kubectl命令:
kubectl [command] [TYPE] [NAME] [flags]
command指定希望对一个或多个资源执行的操作，例如create,get,describe,delete。TYPE资源类型, 例如pod，可以是单复数形式，或或者简写形式。例如：kubectl get pod pod1 kubectl get pods pod1 kubectl get po pod1NAME资源的名称，例如kubectl describe pod example-pod1,example-pod1是名称flags选项标志，例如可以使用-s或--server标志来指定Kubernetes API服务器的地址和端口。
常用命令
kubectl apply
从文件应用或更新资源。
# Create a service using the definition in example-service.yaml.
kubectl apply -f example-service.yaml
# Create a replication controller using the definition in example-controller.yaml.
kubectl apply -f example-controller.yaml
# Create the objects that are defined in any .yaml, .yml, or .json file within the <directory> directory.
kubectl apply -f <directory>
kubectl get
列出资源。
# List all pods in plain-text output format.
kubectl get pods
# List all pods in plain-text output format and include additional information (such as node name).
kubectl get pods -o wide
# List the replication controller with the specified name in plain-text output format. Tip: You can shorten and replace the 'replicationcontroller' resource type with the alias 'rc'.
kubectl get replicationcontroller <rc-name>
# List all replication controllers and services together in plain-text output format.
kubectl get rc,services
# List all daemon sets in plain-text output format.
kubectl get ds
# List all pods running on node server01
kubectl get pods --field-selector=spec.nodeName=server01
kubectl describe
获取资源详情。
# Display the details of the node with name <node-name>.
kubectl describe nodes <node-name>
# Display the details of the pod with name <pod-name>.
kubectl describe pods/<pod-name>
# Display the details of all the pods that are managed by the replication controller named <rc-name>.
# Remember: Any pods that are created by the replication controller get prefixed with the name of the replication controller.
kubectl describe pods <rc-name>
# Describe all pods
kubectl describe pods
kubectl delete
删除资源。
# Delete a pod using the type and name specified in the pod.yaml file.
kubectl delete -f pod.yaml
# Delete all the pods and services that have the label name=<label-name>.
kubectl delete pods,services -l name=<label-name>
# Delete all the pods and services that have the label name=<label-name>.
kubectl delete pods,services -l name=<label-name>
# Delete all pods, including uninitialized ones.
kubectl delete pods --all
kubectl exec
对pod中的容器执行命令。
# Get output from running 'date' from pod <pod-name>. By default, output is from the first container.
kubectl exec <pod-name> date
# Get output from running 'date' in container <container-name> of pod <pod-name>.
kubectl exec <pod-name> -c <container-name> date
# Get an interactive TTY and run /bin/bash from pod <pod-name>. By default, output is from the first container.
kubectl exec -ti <pod-name> /bin/bash
kubectl logs
打印pod日志。
# Return a snapshot of the logs from pod <pod-name>.
kubectl logs <pod-name>
# Start streaming the logs from pod <pod-name>. This is similar to the 'tail -f' Linux command.
kubectl logs -f <pod-name>