kubectl

https://github.com/kubernetes/kubectl/raw/master/images/kubectl-logo-medium.png

While this Book is focused on using Kubectl to declaratively manage Applications in Kubernetes, it also covers other Kubectl functions.

「キューブコントロール」

Plugins

krew

kubens

sterm

code: (bash)

❯ kubectl

kubectl controls the Kubernetes cluster manager.

Basic Commands (Beginner):

create Create a resource from a file or from stdin

expose Take a replication controller, service, deployment or pod and expose it as a new Kubernetes service

run Run a particular image on the cluster

set Set specific features on objects

Basic Commands (Intermediate):

explain Get documentation for a resource

get 1つまたは複数のリソースを表示する

edit Edit a resource on the server

delete Delete resources by file names, stdin, resources and names, or by resources and label selector

Deploy Commands:

rollout Manage the rollout of a resource

scale Set a new size for a deployment, replica set, or replication controller

autoscale Auto-scale a deployment, replica set, stateful set, or replication controller

Cluster Management Commands:

certificate Modify certificate resources.

cluster-info Display cluster information

top Display resource (CPU/memory) usage

cordon Mark node as unschedulable

uncordon Mark node as schedulable

drain Drain node in preparation for maintenance

taint Update the taints on one or more nodes

Troubleshooting and Debugging Commands:

describe Show details of a specific resource or group of resources

logs Print the logs for a container in a pod

attach Attach to a running container

exec Execute a command in a container

port-forward Forward one or more local ports to a pod

proxy Run a proxy to the Kubernetes API server

cp Copy files and directories to and from containers

auth Inspect authorization

debug Create debugging sessions for troubleshooting workloads and nodes

Advanced Commands:

diff Diff the live version against a would-be applied version

apply Apply a configuration to a resource by file name or stdin

patch Update fields of a resource

replace Replace a resource by file name or stdin

wait Experimental: Wait for a specific condition on one or many resources

kustomize Build a kustomization target from a directory or URL.

Settings Commands:

label リソースのラベルを更新する

annotate リソースのアノテーションを更新する

completion Output shell completion code for the specified shell (bash, zsh or fish)

Other Commands:

alpha Commands for features in alpha

api-resources Print the supported API resources on the server

api-versions Print the supported API versions on the server, in the form of "group/version"

config kubeconfigを変更する

plugin Provides utilities for interacting with plugins

version Print the client and server version information

Usage:

Use "kubectl <command> --help" for more information about a given command.

Use "kubectl options" for a list of global command-line options (applies to all commands).

memo

kubectl get

NGINX_IP=$(kubectl get pod nginx -o jsonpath='{.status.podIP}')

--show-labels

-l|--selector

-L|--label-columns

kubectl run

-it

--rm

終了した Pod を自動的に削除する。

kubectl create quota

--hard=cpu=1,memory=1G,pods=2,services=3,replicationcontrollers=2,resourcequotas=1,secrets=5,persistentvolumeclaims=10

kubectl set

kubectl label

ラベルの追加・変更・削除を行う

kubectl label pods foo bar-

kubectl annotate

アノテーションの追加・変更・削除を行う

kubectl annotate pods foo description-

kubectl logs

kubectl top

リソースの使用率を確認する。

kubectl cordon/uncordon $node

対象ノードに Pod をスケジュールする/しない

今デプロイされている Pod には影響がない

kubectl drain

対象ノードをメンテナンスモードにする

Pod を追い出す

--ignore-daemonsets

--force

rs に属さない Pod も削除する

再作成されない

kubectl debug

エフェメラルコンテナーを作成する