kubectl 命令

常用示例

说明

kubectl is the official command-line interface for Kubernetes, used to communicate with the cluster's API server to manage and inspect resources. It supports the full lifecycle of Kubernetes objects, including creating, reading, updating, and deleting resources such as pods, deployments, services, configmaps, and more through declarative manifests or imperative commands. The tool reads connection details from a kubeconfig file, which defines clusters, users, and contexts that determine which cluster and namespace kubectl targets. Beyond basic resource management, kubectl provides capabilities for debugging with log retrieval and exec sessions, scaling workloads, rolling out updates, port-forwarding to pods, and applying configuration changes from YAML or JSON manifests. Role-based access control (RBAC) on the cluster side governs what operations each authenticated user may perform.

参数

get _TYPE_ _NAME_

List resources of specified type.

describe _TYPE_ _NAME_

Show detailed information about a resource.

apply -f _FILE_

Apply configuration from file or directory.

delete _TYPE_ _NAME_

Delete a resource.

logs _POD_ -c _container_

Show pod logs, optionally for a specific container.

exec -it _POD_ -- _COMMAND_

Execute command in a container.

port-forward _POD_ _LOCAL:REMOTE_

Forward local port to pod port.

scale _TYPE/NAME_ --replicas=_N_

Scale a resource to N replicas.

create _TYPE_ _NAME_

Create a resource imperatively.

edit _TYPE_ _NAME_

Edit a resource in your default editor.

-n, --namespace _NAMESPACE_

Target namespace.

-o, --output _FORMAT_

Output format: json, yaml, wide, name.

-l, --selector _LABEL_

Filter by label selector.

--context _CONTEXT_

Kubeconfig context to use.

-A, --all-namespaces

List resources across all namespaces.