Kubernetes 常用指令

kubectl 基本指令

run 建立 Pod

kubectl run po $PODNAME --image=$IMAGENAME --restart=Never --dry-run=client

-dry-run 參數常用來生成建立 POD 的 YAML 檔案（證照考試常用）

apply 透過文件創建物件

kubectl apply -f $FILE.YAML

delete 删除物件

kubectl delete pod $PODNAME

get 查看物件

kubectl get pod --namespace=$NSNAME

只查看特定 namespace 中的 pod

kubectl get pods -o wide

查看 pod 的所有細節

kubectl get all -A

查看所有 namespace 的 pod

kubectl get deployment $DPNAME

查看 deployment 細節

kubectl get pod $PODNAME -o yaml

#取得建立 POD 時的 YAML 檔案

kubectl get pod $PODNAME -v 6

獲取每一個 kubectl 命令在 API level 的 log，使用 6,7,8,9 不同的 level，數值越大得到的信息詳細

kubectl get pods $PODNAME --watch -v 6

持續監聽 lubectl 在 API level 的操作

kubectl get events

查看創建 pod 中發生的 issue

kubectl get deployments

取得 deployments 資訊

kubectl get rs

取得 Replication Set 資訊

kubectl get services --sort-by=.metadata.name

透過排序名字列出 service

kubectl get pods --sort-by='.status.containerStatuses[0].restartCount'

透過 restart count 列出 pods

kubectl get pv --sort-by=.spec.capacity.storage

透過容量列出 Persistent Volumes

kubectl get pods --selector=app=cassandra -o \
  jsonpath='{.items[*].metadata.labels.version}'

透過 version label app = cassandra 取得 pods

kubectl get configmap myconfig \
  -o jsonpath='{.data.ca\.crt}'

取得 configmap 中的 ca.crt

kubectl get secret my-secret --template='{{index .data "key-name-with-dashes"}}'

kubectl get node --selector='!node-role.kubernetes.io/control-plane'

排除包含標籤 node-role.kubernetes.io/control-plane 的 node

kubectl get pods --field-selector=status.phase=Running

取得正在運行的 pod

kubectl get nodes -o jsonpath='{.items[*].status.addresses[?(@.type=="ExternalIP")].address}'

取得 nodes 上所有 ExternalIPs

sel=${$(kubectl get rc my-rc --output=json | jq -j '.spec.selector | to_entries | .[] | "\(.key)=\(.value),"')%?}
echo $(kubectl get pods --selector=$sel --output=jsonpath={.items..metadata.name})

取得 my-rc 中的 pod 名稱

kubectl get pods --show-labels

取得所有的 pod 並附註 label

JSONPATH='{range .items[*]}{@.metadata.name}:{range @.status.conditions[*]}{@.type}={@.status};{end}{end}' \
&& kubectl get nodes -o jsonpath="$JSONPATH" | grep "Ready=True"

取得所有正在運行的 Node

kubectl get node -o custom-columns='NODE_NAME:.metadata.name,STATUS:.status.conditions[?(@.type=="Ready")].status'

取得所有正在運行的 Node，並附加客製 Column

kubectl get secret my-secret -o go-template='{{range $k,$v := .data}}{{"### "}}{{$k}}{{"\n"}}{{$v|base64decode}}{{"\n\n"}}{{end}}'

取得 decoded 過的 secrets

kubectl get pods -o json | jq '.items[].spec.containers[].env[]?.valueFrom.secretKeyRef.name' | grep -v null | sort | uniq

取得有被 pod 使用的 secret

kubectl get pods --all-namespaces -o jsonpath='{range .items[*].status.initContainerStatuses[*]}{.containerID}{"\n"}{end}' | cut -d/ -f3

取得所有包含 init countainer 的 containerIDs

kubectl get events --sort-by=.metadata.creationTimestamp

透過排序 timestamp 取得所有 events

kubectl events --types=Warning

取得所有 warning events

kubectl get nodes -o json | jq -c 'paths|join(".")'

"apiVersion"
"items"
"items.0"
"items.0.apiVersion"
"items.0.kind"
"items.0.metadata"
"items.0.metadata.annotations"
"items.0.metadata.annotations.flannel.alpha.coreos.com/backend-data"
"items.0.metadata.annotations.flannel.alpha.coreos.com/backend-type"
"items.0.metadata.annotations.flannel.alpha.coreos.com/kube-subnet-manager"
"items.0.metadata.annotations.flannel.alpha.coreos.com/public-ip"
"items.0.metadata.annotations.kubeadm.alpha.kubernetes.io/cri-socket"
"items.0.metadata.annotations.node.alpha.kubernetes.io/ttl"
"items.0.metadata.annotations.volumes.kubernetes.io/controller-managed-attach-detach"
"items.0.metadata.creationTimestamp"
"items.0.metadata.labels"
"items.0.metadata.labels.beta.kubernetes.io/arch"
"items.0.metadata.labels.beta.kubernetes.io/os"
"items.0.metadata.labels.kubernetes.io/arch"
"items.0.metadata.labels.kubernetes.io/hostname"
"items.0.metadata.labels.kubernetes.io/os"
"items.0.metadata.labels.node-role.kubernetes.io/control-plane"
"items.0.metadata.labels.node.kubernetes.io/exclude-from-external-load-balancers"
"items.0.metadata.name"
"items.0.metadata.resourceVersion"
"items.0.metadata.uid"
"items.0.spec"
"items.0.spec.podCIDR"
"items.0.spec.podCIDRs"
"items.0.spec.podCIDRs.0"
"items.0.spec.taints"
"items.0.spec.taints.0"
"items.0.spec.taints.0.effect"
"items.0.spec.taints.0.key"
"items.0.status"
"items.0.status.addresses"
"items.0.status.addresses.0"
"items.0.status.addresses.0.address"
"items.0.status.addresses.0.type"
"items.0.status.addresses.1"
"items.0.status.addresses.1.address"
"items.0.status.addresses.1.type"
"items.0.status.allocatable"
"items.0.status.allocatable.cpu"
"items.0.status.allocatable.ephemeral-storage"
"items.0.status.allocatable.hugepages-2Mi"
"items.0.status.allocatable.memory"
"items.0.status.allocatable.pods"
"items.0.status.capacity"
"items.0.status.capacity.cpu"
"items.0.status.capacity.ephemeral-storage"
"items.0.status.capacity.hugepages-2Mi"
"items.0.status.capacity.memory"
"items.0.status.capacity.pods"
"items.0.status.conditions"
"items.0.status.conditions.0"
"items.0.status.conditions.0.lastHeartbeatTime"
"items.0.status.conditions.0.lastTransitionTime"
"items.0.status.conditions.0.message"
"items.0.status.conditions.0.reason"
"items.0.status.conditions.0.status"
"items.0.status.conditions.0.type"
"items.0.status.conditions.1"
"items.0.status.conditions.1.lastHeartbeatTime"
"items.0.status.conditions.1.lastTransitionTime"
"items.0.status.conditions.1.message"
"items.0.status.conditions.1.reason"
"items.0.status.conditions.1.status"
"items.0.status.conditions.1.type"
"items.0.status.conditions.2"
"items.0.status.conditions.2.lastHeartbeatTime"
"items.0.status.conditions.2.lastTransitionTime"
"items.0.status.conditions.2.message"
"items.0.status.conditions.2.reason"
"items.0.status.conditions.2.status"
"items.0.status.conditions.2.type"
"items.0.status.conditions.3"
"items.0.status.conditions.3.lastHeartbeatTime"
"items.0.status.conditions.3.lastTransitionTime"
"items.0.status.conditions.3.message"
"items.0.status.conditions.3.reason"
"items.0.status.conditions.3.status"
"items.0.status.conditions.3.type"
"items.0.status.conditions.4"
"items.0.status.conditions.4.lastHeartbeatTime"
"items.0.status.conditions.4.lastTransitionTime"
"items.0.status.conditions.4.message"
"items.0.status.conditions.4.reason"
"items.0.status.conditions.4.status"
"items.0.status.conditions.4.type"
"items.0.status.daemonEndpoints"
"items.0.status.daemonEndpoints.kubeletEndpoint"
"items.0.status.daemonEndpoints.kubeletEndpoint.Port"
"items.0.status.images"
"items.0.status.images.0"
"items.0.status.images.0.names"
"items.0.status.images.0.names.0"
"items.0.status.images.0.names.1"
"items.0.status.images.0.sizeBytes"
"items.0.status.images.1"
"items.0.status.images.1.names"
"items.0.status.images.1.names.0"
"items.0.status.images.1.names.1"
"items.0.status.images.1.sizeBytes"
"items.0.status.images.2"
"items.0.status.images.2.names"
"items.0.status.images.2.names.0"
"items.0.status.images.2.names.1"
"items.0.status.images.2.sizeBytes"
"items.0.status.images.3"
"items.0.status.images.3.names"
"items.0.status.images.3.names.0"
"items.0.status.images.3.names.1"
"items.0.status.images.3.sizeBytes"
"items.0.status.images.4"
"items.0.status.images.4.names"
"items.0.status.images.4.names.0"
"items.0.status.images.4.names.1"
"items.0.status.images.4.sizeBytes"
"items.0.status.images.5"
"items.0.status.images.5.names"
"items.0.status.images.5.names.0"
"items.0.status.images.5.names.1"
"items.0.status.images.5.sizeBytes"
"items.0.status.images.6"
"items.0.status.images.6.names"
"items.0.status.images.6.names.0"
"items.0.status.images.6.names.1"
"items.0.status.images.6.sizeBytes"
"items.0.status.images.7"
"items.0.status.images.7.names"
"items.0.status.images.7.names.0"
"items.0.status.images.7.names.1"
"items.0.status.images.7.sizeBytes"
"items.0.status.images.8"
"items.0.status.images.8.names"
"items.0.status.images.8.names.0"
"items.0.status.images.8.names.1"
"items.0.status.images.8.sizeBytes"
"items.0.status.images.9"
"items.0.status.images.9.names"
"items.0.status.images.9.names.0"
"items.0.status.images.9.names.1"
"items.0.status.images.9.sizeBytes"
"items.0.status.nodeInfo"
"items.0.status.nodeInfo.architecture"
"items.0.status.nodeInfo.bootID"
"items.0.status.nodeInfo.containerRuntimeVersion"
"items.0.status.nodeInfo.kernelVersion"
"items.0.status.nodeInfo.kubeProxyVersion"
"items.0.status.nodeInfo.kubeletVersion"
"items.0.status.nodeInfo.machineID"
"items.0.status.nodeInfo.operatingSystem"
"items.0.status.nodeInfo.osImage"
"items.0.status.nodeInfo.systemUUID"
"items.1"
"items.1.apiVersion"
"items.1.kind"
"items.1.metadata"
"items.1.metadata.annotations"
"items.1.metadata.annotations.flannel.alpha.coreos.com/backend-data"
"items.1.metadata.annotations.flannel.alpha.coreos.com/backend-type"
"items.1.metadata.annotations.flannel.alpha.coreos.com/kube-subnet-manager"
"items.1.metadata.annotations.flannel.alpha.coreos.com/public-ip"
"items.1.metadata.annotations.kubeadm.alpha.kubernetes.io/cri-socket"
"items.1.metadata.annotations.node.alpha.kubernetes.io/ttl"
"items.1.metadata.annotations.volumes.kubernetes.io/controller-managed-attach-detach"
"items.1.metadata.creationTimestamp"
"items.1.metadata.labels"
"items.1.metadata.labels.beta.kubernetes.io/arch"
"items.1.metadata.labels.beta.kubernetes.io/os"
"items.1.metadata.labels.kubernetes.io/arch"
"items.1.metadata.labels.kubernetes.io/hostname"
"items.1.metadata.labels.kubernetes.io/os"
"items.1.metadata.name"
"items.1.metadata.resourceVersion"
"items.1.metadata.uid"
"items.1.spec"
"items.1.spec.podCIDR"
"items.1.spec.podCIDRs"
"items.1.spec.podCIDRs.0"
"items.1.status"
"items.1.status.addresses"
"items.1.status.addresses.0"
"items.1.status.addresses.0.address"
"items.1.status.addresses.0.type"
"items.1.status.addresses.1"
"items.1.status.addresses.1.address"
"items.1.status.addresses.1.type"
"items.1.status.allocatable"
"items.1.status.allocatable.cpu"
"items.1.status.allocatable.ephemeral-storage"
"items.1.status.allocatable.hugepages-2Mi"
"items.1.status.allocatable.memory"
"items.1.status.allocatable.pods"
"items.1.status.capacity"
"items.1.status.capacity.cpu"
"items.1.status.capacity.ephemeral-storage"
"items.1.status.capacity.hugepages-2Mi"
"items.1.status.capacity.memory"
"items.1.status.capacity.pods"
"items.1.status.conditions"
"items.1.status.conditions.0"
"items.1.status.conditions.0.lastHeartbeatTime"
"items.1.status.conditions.0.lastTransitionTime"
"items.1.status.conditions.0.message"
"items.1.status.conditions.0.reason"
"items.1.status.conditions.0.status"
"items.1.status.conditions.0.type"
"items.1.status.conditions.1"
"items.1.status.conditions.1.lastHeartbeatTime"
"items.1.status.conditions.1.lastTransitionTime"
"items.1.status.conditions.1.message"
"items.1.status.conditions.1.reason"
"items.1.status.conditions.1.status"
"items.1.status.conditions.1.type"
"items.1.status.conditions.2"
"items.1.status.conditions.2.lastHeartbeatTime"
"items.1.status.conditions.2.lastTransitionTime"
"items.1.status.conditions.2.message"
"items.1.status.conditions.2.reason"
"items.1.status.conditions.2.status"
"items.1.status.conditions.2.type"
"items.1.status.conditions.3"
"items.1.status.conditions.3.lastHeartbeatTime"
"items.1.status.conditions.3.lastTransitionTime"
"items.1.status.conditions.3.message"
"items.1.status.conditions.3.reason"
"items.1.status.conditions.3.status"
"items.1.status.conditions.3.type"
"items.1.status.conditions.4"
"items.1.status.conditions.4.lastHeartbeatTime"
"items.1.status.conditions.4.lastTransitionTime"
"items.1.status.conditions.4.message"
"items.1.status.conditions.4.reason"
"items.1.status.conditions.4.status"
"items.1.status.conditions.4.type"
"items.1.status.daemonEndpoints"
"items.1.status.daemonEndpoints.kubeletEndpoint"
"items.1.status.daemonEndpoints.kubeletEndpoint.Port"
"items.1.status.images"
"items.1.status.images.0"
"items.1.status.images.0.names"
"items.1.status.images.0.names.0"
"items.1.status.images.0.names.1"
"items.1.status.images.0.sizeBytes"
"items.1.status.images.1"
"items.1.status.images.1.names"
"items.1.status.images.1.names.0"
"items.1.status.images.1.names.1"
"items.1.status.images.1.sizeBytes"
"items.1.status.images.2"
"items.1.status.images.2.names"
"items.1.status.images.2.names.0"
"items.1.status.images.2.names.1"
"items.1.status.images.2.sizeBytes"
"items.1.status.images.3"
"items.1.status.images.3.names"
"items.1.status.images.3.names.0"
"items.1.status.images.3.names.1"
"items.1.status.images.3.sizeBytes"
"items.1.status.nodeInfo"
"items.1.status.nodeInfo.architecture"
"items.1.status.nodeInfo.bootID"
"items.1.status.nodeInfo.containerRuntimeVersion"
"items.1.status.nodeInfo.kernelVersion"
"items.1.status.nodeInfo.kubeProxyVersion"
"items.1.status.nodeInfo.kubeletVersion"
"items.1.status.nodeInfo.machineID"
"items.1.status.nodeInfo.operatingSystem"
"items.1.status.nodeInfo.osImage"
"items.1.status.nodeInfo.systemUUID"
"kind"
"metadata"
"metadata.resourceVersion"

產生一個以句點分隔的樹，其中包含為 Node 等返回的所有 key

kubectl get pods -o json | jq -c 'paths|join(".")'

"apiVersion"
"items"
"kind"
"metadata"
"metadata.resourceVersion" 

產生一個以句點分隔的樹，其中包含為 Pod 等返回的所有 key

for pod in $(kubectl get po --output=jsonpath={.items..metadata.name}); do echo $pod && kubectl exec -it $pod -- env; done

找出有使用 env 指令的 pod

kubectl get deployment nginx-deployment --subresource=status

取得 deployment nginx-deployment 中的 subresource

create 創建物件

kubectl create deployment $DPNAME --image=$IMAGENAME --replicas 3

創建一個 deployment

kubectl create job $JOBNAME --image=$IMAGENAME -- sh -c "sleep 50"

創建一個 job

kubectl create cronjob $CRONJOBNAME --image=$IMAGENAME --schedule="*/1 * * * *" -- echo "Hello World”

創建一個 cronjob

kubectl create ns $NSNAME

創建 namespace

describe 詳細描述物件資訊

kubectl describe nodes $NODENAME

查看 Node

kubectl describe pods $PODNAME

查看 Pod

delete 刪除物件

kubectl delete pod $PODNAME

kubectl delete service $SERVICENAME

kubectl delete deployments.apps web

kubectl delete persistentvolumeclaims $PVCNAME

kubectl delete persistentvolume $PVNAME

kubectl delete pod $PODNAME --grace-period=$SECOND

在時間內刪除 pod

kubectl delete pod $PODNAME --grace-period=0 --force

強制刪除 pod （SIGKILL）

expose 創建 service

kubectl expose -f $FILENAME

kubectl expose --port=$PORT --protocol=TCP/UDP --target-port=$NAME --name=$NAME ----externalip=$IP

log 查看日誌 log

kubectl logs $PODNAME

kubectl logs $POD_NAME -c $CONTAINER_NAME

kubectl logs $POD_NAME --all-containers

kubectl logs --selector $KEY1=$VALUE1

kubectl logs -f $POD_NAME
follow latest logs

kubectl logs -f $POD_NAME $CONTAINER_NAME
若 Pod 內有兩個以上的 container，要在指令後方加上 container name，否則會發生 error

kubectl logs $POD_NAME --tail 5

get 最近的 5 個 log

kubectl logs $POD_NAME -f --previous

查看 Pod 之前的 log

exec 在 pod 中執行指令

kubectl exec $POD_NAME -- ls /

在 POD 執行指令

kubectl exec --stdin --tty $POD_NAME -- /bin/sh

連線 POD 的 SHELL

kubectl exec $PODNAME -c my-container -- ls /

在多個同樣的 PODS 裡面運行指令

annotate 在 pod 中建立註解

kubectl annotate [--overwrite] (-f FILENAME | TYPE NAME) KEY_1=VAL_1 ... KEY_N=VAL_N [--resource-version=version]`

在 pod 上建立一般描述 Annotation

debug 建立 debug 模式

kubectl debug (POD | TYPE[[.VERSION].GROUP]/NAME) [ -- COMMAND [args...] ]`

set 更新 image

kubectl set image deployment/web nginx**=**nginx:1.14.2`

rollout 更新回滾

kubectl rollout undo deployment $DPNAME --to-revision=1

kubectl rollout history deployment $DPNAME
查看 rollout history

kubectl rollout history deployment $DPNAME --revision=1
查看 revision history

scale 擴展 Deployment

kubectl scale deployment $DP_NAME --replicas 5

taint 限制節點不能建立 pod

kubectl taint nodes $NODENAME $KEY1=$VALUE1:NoSchedule

新增 taint

kubectl taint nodes $NODENAME $KEY1=$VALUE1:NoSchedule-

移除 taint

label 為資源加上 label

kubectl label nodes $NODENAME hardware=local_gpu

cordon 標記節點不能建立 pod

kubectl cordon $NODENAME

drain 非強制的刪除節點上的 Pod

kubectl drain $NODE_NAME --ingore-daemonsets`

top 查看資源 CPU Memory

kubectl top pods

kubectl top nodes

auth 確認權限

kubectl auth can-i $OPTION $RESOURCES

kubectl auth can-i create nodes
kubectl auth can-i delete pods
kubectl auth can-i delete nodes --as dev-user`

config 環境初始設定

kubectl config view

展示 kubeconfig 的設定內容

kubectl config view -o jsonpath='{.users[?(@.name == "e2e")].user.password}'

取得 user e2e 的 password

kubectl config view -o jsonpath='{.users[*].name}'

取得用戶清單

kubectl config get-contexts

取得 context 清單

kubectl config current-context

取得 current context

kubectl config use-context my-cluster-name

設定 the default context to my-cluster-name

kubectl cluster-info

kubectl config view

apiVersion: v1
  clusters:
  - cluster:
    certificate-authority-data: DATA+OMITTED
    server: [<https://172.31.9.108:6443>](<https://172.31.9.108:6443/>)
    name: kubernetes
    contexts:
    - context:
    cluster: kubernetes
    user: kubernetes-admin
    name: kubernetes-admin@kubernetes
    current-context: kubernetes-admin@kubernetes
    kind: Config
    preferences: {}
    users:
    - name: kubernetes-admin
    user:
    client-certificate-data: DATA+OMITTED
    client-key-data: DATA+OMITTED

kubectl config view --raw

apiVersion: v1
  clusters:

    - cluster:
    certificate-authority-data:
    server: [<https://172.31.9.108:6443>](<https://172.31.9.108:6443/>)
    name: kubernetes
    contexts:
    - context:
    cluster: kubernetes
    user: kubernetes-admin
    name: kubernetes-admin@kubernetes
    current-context: kubernetes-admin@kubernetes
    kind: Config
    preferences: {}
    users:
    - name: kubernetes-admin
    user:
    client-certificate-data:
    client-key-data:

kubectl config get-contexts

patch 更新物件

kubectl patch node $NODENAME -p '{"spec":{"unschedulable":true}}'

單獨升級 node

kubectl patch pod valid-pod -p '{"spec":{"containers":[{"name":"kubernetes-serve-hostname","image":"new image"}]}}'`

更新 pod 中的 container image

kubectl patch pod valid-pod --type='json' -p='[{"op": "replace", "path": "/spec/containers/0/image", "value":"new image"}]'`

透過 json patch 更新 container 的 image

kubectl patch deployment valid-deployment  --type json   -p='[{"op": "remove", "path": "/spec/template/spec/containers/0/livenessProbe"}]'

關閉 deployment 中的 livenessProbe

kubectl patch sa default --type='json' -p='[{"op": "add", "path": "/secrets/1", "value": {"name": "whatever" } }]'`

將新的 element 加入到 positional array

kubectl patch deployment nginx-deployment --subresource='scale' --type='merge' -p '{"spec":{"replicas":2}}'`

升級 deployment 中的 replica，更新其中的 subresources

kubeadm 基本指令

init 初始化一個控制平面節點

kubeadm init

join 將工作節點並將其加入集群

kubeadm join --discovery-token abcdef.1234567890abcdef 1.2.3.4:6443

upgrade 支持升級的規劃和執行

kubeadm upgrade plan $VERSION $FLAG

檢查可升級到哪些版本，並驗證你當前的集群是否可升級

kubeadm upgrade apply $VERSION

將 Kubernetes 集群升级到指定版本

config 列出默認靜態配置

kubeadm config print

reset 還原由 init 或 join 所做更改

kubeadm reset [flags]

token 在 server 上創造 token

kubeadm token create $TOKEN

version 输出 kubeadm 的版本

kubeadm version

特殊使用情境

檢視服務紀錄檔

systemctl status kubelet

systemctl status kube-controller-manager -l

journalctl -u kube-controller-manager

journalctl -u kubelet

檢視 Control Plane 服務

service kube-apiserver status

service kube-controller-manager status

service kube-scheduler status

service kubelet status

service kube-proxy status

kubectl logs kube-apiserver-master -n kube-system

sudo journalctl -u kube-apiserver

檢視 worker node

service kubelet status

sudo journalctl –u kubelet

檢視 certification

openssl x509 -in /var/lib/kubelet/worker-1.crt -text

資源縮寫

資源名稱	縮寫
cluster
componentstatuses	cs
configmaps	cm
daemonsets	ds
deployments	deploy
endpoints	ep
events	ev
horizontalpodautoscaler	hpa
ingress	ing
nodes	no
namespaces	ns
persistentvolumeclaims	pvc
persisitentvolume	pv
pods	po
podsecuritypolicy	psp
replicasets	rs
replicationcontrollers	rc
resoucesquotas	quota
services	svc
storageclasses	sc

Kubernetes 常用指令

kubectl 基本指令​

run 建立 Pod​

apply 透過文件創建物件​

delete 删除物件​

get 查看物件​

create 創建物件​

describe 詳細描述物件資訊​

delete 刪除物件​

expose 創建 service​

log 查看日誌 log​

exec 在 pod 中執行指令​

annotate 在 pod 中建立註解​

debug 建立 debug 模式​

set 更新 image​

rollout 更新回滾​

scale 擴展 Deployment​

taint 限制節點不能建立 pod​

label 為資源加上 label​

cordon 標記節點不能建立 pod​

drain 非強制的刪除節點上的 Pod​

top 查看資源 CPU Memory​

auth 確認權限​

config 環境初始設定​

patch 更新物件​

kubeadm 基本指令​

init 初始化一個控制平面節點​

join 將工作節點並將其加入集群​

upgrade 支持升級的規劃和執行​

config 列出默認靜態配置​

reset 還原由 init 或 join 所做更改​

token 在 server 上創造 token​

version 输出 kubeadm 的版本​

特殊使用情境​

檢視服務紀錄檔​

檢視 Control Plane 服務​

檢視 worker node​

檢視 certification​

資源縮寫​

kubectl 基本指令

run 建立 Pod

apply 透過文件創建物件

delete 删除物件

get 查看物件

create 創建物件

describe 詳細描述物件資訊

delete 刪除物件

expose 創建 service

log 查看日誌 log

exec 在 pod 中執行指令

annotate 在 pod 中建立註解

debug 建立 debug 模式

set 更新 image

rollout 更新回滾

scale 擴展 Deployment

taint 限制節點不能建立 pod

label 為資源加上 label

cordon 標記節點不能建立 pod

drain 非強制的刪除節點上的 Pod

top 查看資源 CPU Memory

auth 確認權限

config 環境初始設定

patch 更新物件

kubeadm 基本指令

init 初始化一個控制平面節點

join 將工作節點並將其加入集群

upgrade 支持升級的規劃和執行

config 列出默認靜態配置

reset 還原由 init 或 join 所做更改

token 在 server 上創造 token

version 输出 kubeadm 的版本

特殊使用情境

檢視服務紀錄檔

檢視 Control Plane 服務

檢視 worker node

檢視 certification

資源縮寫