kubectl 命令速查手册
myPod
---
kind: Pod
apiVersion: v1
metadata:
name: mypod
spec:
terminationGracePeriodSeconds: 0
containers:
- name: linux
image: busybox:latest
imagePullPolicy: IfNotPresent
command: ["sh", "-c"]
args:
- |
echo "hello world !!!" >/var/www/index.html
httpd -v -f -p 0.0.0.0:80 -h /var/www
restartPolicy: Always
myDeploy
---
kind: Deployment
apiVersion: apps/v1
metadata:
name: myweb
spec:
replicas: 1
selector:
matchLabels:
app: apache
template:
metadata:
labels:
app: apache
spec:
containers:
- name: httpd
image: myos:httpd
imagePullPolicy: IfNotPresent
ports:
- protocol: TCP
containerPort: 80
resources:
requests:
memory: "32Mi"
cpu: "10m"
restartPolicy: Always
annotate
# 更新资源所关联的注释信息
#-----------------------------------------#
[root@master K8S]# kubectl apply -f mypod.yaml --record
[root@master K8S]# kubectl get pod mypod -o custom-columns=podName:.metadata.name,annotations:.metadata.annotations."kubernetes\.io/change-cause"
podName annotations
mypod kubectl apply --filename=mypod.yaml --record=true
[root@master K8S]# kubectl annotate pods mypod kubernetes.io/change-cause='my description'
pod/mypod annotated
[root@master K8S]# kubectl get pod mypod -o custom-columns=podName:.metadata.name,annotations:.metadata.annotations."kubernetes\.io/change-cause"
podName annotations
mypod my description
api-resources
# 显示服务器上所支持的 API 资源
# -o wide 可以用来查询资源权限
#-----------------------------------------#
[root@master K8S]# kubectl api-resources -o wide
NAME SHORTNAMES APIVERSION NAMESPACED KIND VERBS
pods po v1 true Pod [get list patch ...]
namespaces ns v1 false Namespace [create get ...]
api-versions
# 显示服务端所支持的 API 版本
#-----------------------------------------#
[root@master K8S]# kubectl api-versions
admissionregistration.k8s.io/v1
apps/v1
... ...
v1
apply
# 读取资源文件,将新的配置应用到资源上
#-----------------------------------------#
[root@master K8S]#
[root@master K8S]# kubectl apply -f mypod.yaml
pod/mypod created
[root@master K8S]# sed 's,mypod,myweb,g' mypod.yaml |kubectl apply -f -
pod/myweb created
[root@master K8S]# kubectl get pods
NAME READY STATUS RESTARTS AGE
mypod 1/1 Running 0 36s
myweb 1/1 Running 0 4s
attach
# 连接一个正在运行的容器的启动进程
#-----------------------------------------#
[root@master K8S]# kubectl attach mypod -c linux
If you don't see a command prompt, try pressing enter.
10.244.219.64:44372: response:200
auth
# 检查授权信息
#-----------------------------------------#
[root@master K8S]# kubectl --kubeconfig=admin.conf auth can-i get pods
yes
[root@master K8S]# kubectl --kubeconfig=auth.conf auth can-i get pods
no
autoscale
# 创建一个HPA控制器，对资源对象进行自动扩缩
#-----------------------------------------#
[root@master K8S]# kubectl apply -f myDeploy.yaml
deployment.apps/myweb created
[root@master K8S]# kubectl autoscale deployment myweb --min=1 --max=10 --cpu-percent=80
horizontalpodautoscaler.autoscaling/myweb autoscaled
[root@master K8S]# kubectl get horizontalpodautoscalers.autoscaling
NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE
myweb Deployment/myweb 10%/80% 1 10 1 27m
#-----------------------------------------#
---
apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
name: myweb
spec:
minReplicas: 1
maxReplicas: 10
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: myweb
targetCPUUtilizationPercentage: 80
certificate
# 修改证书资源
#-----------------------------------------#
[root@master K8S]# kubectl get certificatesigningrequests
NAME AGE REQUESTOR CONDITION
csr-wsfz7 8s system:node:master Pending
[root@master K8S]# kubectl certificate approve csr-wsfz7
[root@master K8S]# kubectl get certificatesigningrequests
NAME AGE REQUESTOR CONDITION
csr-wsfz7 86s system:node:master Approved,Issued
cluster-info
# 显示集群信息
#-----------------------------------------#
[root@master K8S]# kubectl cluster-info
Kubernetes control plane is running at https://192.168.1.10:6443
CoreDNS is running at https://192.168.1.10:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
completion
# 根据已经给出的 Shell 输出 <Tab> 补全代码
#-----------------------------------------#
[root@master K8S]# source <(kubectl completion bash|tee /etc/bash_completion.d/kubectl)
config
# 配置管理 kubeconfig 文件
# 创建普通认证用户中的 CN 代表用户名，O 代表组名称
#-----------------------------------------#
[root@master K8S]# openssl genrsa -out luck.key 2048
[root@master K8S]# openssl req -new -key luck.key -out luck.csr -subj "/CN=luck/O=tedu"
[root@master K8S]# mycsr=$(base64 luck.csr |tr -d '\n')
[root@master K8S]# cat <<EOF |kubectl apply -f -
---
apiVersion: certificates.k8s.io/v1
kind: CertificateSigningRequest
metadata:
name: luck-token
spec:
groups:
- system:authenticated
request: ${mycsr}
signerName: kubernetes.io/kube-apiserver-client
usages:
- client auth
EOF
[root@master K8S]# kubectl get certificatesigningrequests.certificates.k8s.io
NAME AGE SIGNERNAME ... CONDITION
luck-token 12s kubernetes.io/kube-apiserver-client ... Pending
[root@master K8S]# kubectl certificate approve luck-token
[root@master K8S]# kubectl get certificatesigningrequests.certificates.k8s.io
NAME AGE SIGNERNAME ... CONDITION
luck-token 33s kubernetes.io/kube-apiserver-client ... Approved,Issued
[root@master K8S]# kubectl get certificatesigningrequests.certificates.k8s.io luck-token -o jsonpath='{.status.certificate}'| base64 -d >luck.crt
[root@master K8S]# kubectl config --kubeconfig=auth.conf set-cluster k8s-cluster --server=https://192.168.1.10:6443 --certificate-authority=/etc/kubernetes/pki/ca.crt --embed-certs=true
[root@master K8S]# kubectl config --kubeconfig=auth.conf set-credentials adminuser-luck --client-certificate=luck.crt --client-key=luck.key --embed-certs=true
[root@master K8S]# kubectl config --kubeconfig=auth.conf set-context node-cluster --cluster=k8s-cluster --user=adminuser-luck --namespace=default
[root@master K8S]# kubectl config --kubeconfig=auth.conf use-context node-cluster
[root@master K8S]# kubectl create clusterrolebinding luckrole --clusterrole=cluster-admin --user=luck
[root@master K8S]# kubectl config --kubeconfig=auth.conf get-clusters
NAME
k8s-cluster
[root@master K8S]# kubectl config --kubeconfig=auth.conf get-users
NAME
adminuser-luck
[root@master K8S]# kubectl config --kubeconfig=auth.conf get-contexts
CURRENT NAME CLUSTER AUTHINFO NAMESPACE
* node-cluster k8s-cluster adminuser-luck default
convert
# 在不同的 API 版本之间转换配置文件
# 在高版本中已经删除了
#-----------------------------------------#
[root@master K8S]# kubectl convert -f myPod.yaml
cordon
# 标记节点为不可调度的
#-----------------------------------------#
[root@master K8S]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 15h v1.22.3
node-0001 Ready node 15h v1.22.3
[root@master K8S]# kubectl cordon node-0001
node/node-0001 cordoned
[root@master K8S]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 15h v1.22.3
node-0001 Ready,SchedulingDisabled node 15h v1.22.3
cp
# 将文件和目录拷入/拷出容器
#-----------------------------------------#
[root@master K8S]# kubectl get pods
NAME READY STATUS RESTARTS AGE
myweb-759ffdd494-9956m 1/1 Running 0 5h13m
[root@master K8S]# kubectl cp myweb-759ffdd494-9956m:/var/www/html/index.html ./index.html
tar: Removing leading `/' from member names
[root@master K8S]# ls index.html
index.html
[root@master K8S]# echo "hello world" > index.html
[root@master K8S]# kubectl cp index.html myweb-759ffdd494-9956m:/var/www/html/index.html
[root@master K8S]# curl http://10.244.21.168
hello world
create
# 通过文件或标准输入来创建资源或用来生成资源文件
#-----------------------------------------#
[root@master K8S]# kubectl create namespace testapp
[root@master K8S]# kubectl create namespace testapp --dry-run=client -o yaml
apiVersion: v1
kind: Namespace
metadata:
creationTimestamp: null
name: testapp
spec: {}
status: {}
debug
# 创建调试会话,使用附加容器引用目标资源
# 所有节点都需要打开临时容器特性
#-----------------------------------------#
[root@master K8S]# kubectl run myapp --image=registry:5000/k8s/pause:3.5 --restart=Never
[root@master K8S]# kubectl debug myapp -it --image=registry:5000/busybox:latest --share-processes --copy-to=debugger
/ # pstree -p
pause(1)
#-----------------------------------------#
[root@master K8S]# vim /etc/kubernetes/manifests/kube-apiserver.yaml
- --feature-gates=EphemeralContainers=true
[root@master K8S]# vim /var/lib/kubelet/config.yaml
featureGates:
EphemeralContainers: true
[root@master K8S]# systemctl restart kubelet
[root@master K8S]# kubectl run myapp --image=registry:5000/k8s/pause:3.5 --restart=Never
pod/myapp created
[root@master K8S]# kubectl debug -it myapp --image=registry:5000/busybox:latest --target=myapp
~ # pstree -p 0
?(0)-+-pause(1)
`-sh(7)---pstree(27)
~ # ls /proc/1/root/
dev etc pause proc sys var
~ #
delete
# 通过文件名或资源和名字删除资源
#-----------------------------------------#
[root@master K8S]# kubectl get pods
NAME READY STATUS RESTARTS AGE
debugger 2/2 Running 1 (3s ago) 6s
mypod 1/1 Running 0 40s
[root@master K8S]# kubectl delete pod debugger
pod "debugger" deleted
[root@master K8S]# kubectl delete -f mypod.yaml
pod "mypod" deleted
[root@master K8S]# kubectl get pods
No resources found in default namespace.
describe
# 显示某个资源或某组资源的详细信息
#-----------------------------------------#
[root@master K8S]# kubectl describe pod mypod
Name: mypod
Namespace: default
Priority: 0
Node: node-0001/192.168.1.11
...
diff
# 显示目前版本与将要应用的版本之间的差异
#-----------------------------------------#
[root@master K8S]# kubectl diff -f deploy.yaml
diff -u -N /tmp/LIVE-242154721/apps.v1.Deployment.default.myweb /tmp/MERGED-718616268/apps.v1.Deployment.default.myweb
--- /tmp/LIVE-242154721/apps.v1.Deployment.default.myweb 2021-11-07 15:52:02.711915439 +0800
+++ /tmp/MERGED-718616268/apps.v1.Deployment.default.myweb 2021-11-07 15:52:02.711915439 +0800
@@ -5,9 +5,9 @@
deployment.kubernetes.io/revision: "1"
- kubernetes.io/change-cause: httpd.v1
+ kubernetes.io/change-cause: httpd.v2
creationTimestamp: "2021-11-07T07:51:49Z"
- generation: 1
+ generation: 2
managedFields:
- apiVersion: apps/v1
fieldsType: FieldsV1
...
drain
# 清空节点，节点资源被删除也不能被调度
#-----------------------------------------#
[root@master K8S]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 36h v1.22.3
node-0001 Ready node 36h v1.22.3
[root@master K8S]# kubectl drain node-0001 --delete-emptydir-data --ignore-daemonsets --force
[root@master K8S]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 36h v1.22.3
node-0001 Ready,SchedulingDisabled node 36h v1.22.3
edit
# 修改服务器上的某资源
#-----------------------------------------#
[root@master K8S]# kubectl edit pod mypod
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: v1
kind: Pod
...
exec
# 在一个正在运行的容器中执行命令
#-----------------------------------------#
[root@master K8S]# kubectl get pods
NAME READY STATUS RESTARTS AGE
myweb-759ffdd494-9956m 1/1 Running 0 27m
[root@master K8S]# kubectl exec -it myweb-759ffdd494-9956m -c httpd -- /bin/bash
[root@myweb-759ffdd494-9956m html]# ls
index.html info.html info.php
explain
# 显示资源的帮助信息
#-----------------------------------------#
[root@master K8S]# kubectl explain pod.spec
KIND: Pod
VERSION: v1
RESOURCE: spec <Object>
DESCRIPTION:
Specification of the desired behavior of the pod. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status
PodSpec is a description of a pod.
...
expose
# 为资源创建 service
#-----------------------------------------#
[root@master K8S]# [root@master K8S]# kubectl expose deployment myweb --port=80 --protocol=TCP --target-port=80 --name=webservice --type ClusterIP
#-----------------------------------------#
---
apiVersion: v1
kind: Service
metadata:
name: webservice
spec:
ports:
- protocol: TCP
port: 80
targetPort: 80
selector:
app: apache
type: ClusterIP
#-----------------------------------------#
[root@master K8S]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.254.0.1 <none> 443/TCP 36h
webservice ClusterIP 10.254.17.185 <none> 80/TCP 2s
[root@master K8S]# curl http://10.254.17.185
hello world.
get
# 显示一个或者多个资源信息
#-----------------------------------------#
[root@master K8S]# kubectl get nodes
ku NAME STATUS ROLES AGE VERSION
master Ready master 36h v1.22.3
node-0001 Ready node 36h v1.22.3
[root@master K8S]# kubectl get pods
NAME READY STATUS RESTARTS AGE
mypod 1/1 Running 0 5m9s
[root@master K8S]# kubectl get pod mypod -o wide
NAME READY STATUS RESTARTS IP ...
mypod 1/1 Running 0 10.244.21.154 ...
[root@master K8S]# kubectl get pod mypod -o yaml
apiVersion: v1
kind: Pod
metadata:
...
help
# 显示帮助信息
#-----------------------------------------#
[root@master K8S]# kubectl help run
Create and run a particular image in a pod.
Examples:
# Start a nginx pod
kubectl run nginx --image=nginx
kustomize
# Kustomize 是一个独立的工具，用来通过 kustomization 文件定制 Kubernetes 对象
# 参考文档: https://cloud.tencent.com/developer/article/1745189
#-----------------------------------------#
[root@master K8S]# vim kustomization.yaml
---
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
secretGenerator:
- name: mysecret
files:
- password.txt
[root@master K8S]# vim password.txt
username=admin
password=secret
[root@master K8S]# kubectl kustomize ./
apiVersion: v1
data:
password.txt: dXNlcm5hbWU9YWRtaW4KcGFzc3dvcmQ9c2VjcmV0Cg==
kind: Secret
metadata:
name: mysecret-2kdd8ckcc7
type: Opaque
[root@master K8S]# kubectl apply -k ./
secret/mysecret-2kdd8ckcc7 created
[root@master K8S]# kubectl get secrets
NAME TYPE DATA AGE
default-token-m7vbm kubernetes.io/service-account-token 3 73d
mysecret-2kdd8ckcc7 Opaque 1 4s
[root@master K8S]# kubectl delete -k ./
secret "mysecret-2kdd8ckcc7" deleted
label
# 更新资源的标签
#-----------------------------------------#
[root@master K8S]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
mypod 1/1 Running 0 7m22s <none>
[root@master K8S]# kubectl label pod mypod app=webapp
pod/mypod labeled
[root@master K8S]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
mypod 1/1 Running 0 7m41s app=webapp
[root@master K8S]# kubectl label pod mypod app-
pod/mypod labeled
[root@master K8S]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
mypod 1/1 Running 0 68m <none>
logs
# 显示 pod 中某容器的日志
#-----------------------------------------#
[root@master K8S]# kubectl get pod
NAME READY STATUS RESTARTS AGE
mypod 1/1 Running 0 5h4m
[root@master K8S]# kubectl logs mypod -c linux
10.244.219.64:34666: response:200
options
# 显示所有命令都支持的共有参数列表
#-----------------------------------------#
[root@master K8S]# kubectl options
The following options can be passed to any command:
--insecure-skip-tls-verify=false: If true, the server's certificate will not be checked for validity. This will
...
patch
# 基于策略性合并修补规则更新某资源中的字段
#-----------------------------------------#
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: mypv
spec:
capacity:
storage: 5Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
hostPath:
path: /var/webroot
type: DirectoryOrCreate
#-----------------------------------------#
[root@master K8S]# kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS AGE
mypv 5Gi RWO Recycle Available 5s
[root@master K8S]# kubectl patch pv mypv -p '{"spec":{"capacity":{"storage":"8Gi"}}}'
persistentvolume/mypv patched
[root@master K8S]# kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS AGE
mypv 8Gi RWO Recycle Available 67s
plugin
# 运行命令行插件
# 插件在 ${PATH} 下，是一个独立的可执行文件，名称以 kubectl- 开头
#-----------------------------------------#
[root@master K8S]# vim /usr/local/bin/kubectl-gettaint
#!/bin/bash
/usr/bin/kubectl get nodes -o custom-columns=NodeName:.metadata.name,Taints:.spec.taints
[root@master K8S]# chmod 755 /usr/local/bin/kubectl-gettaint
[root@master K8S]# kubectl plugin list
The following compatible plugins are available:
/usr/local/bin/kubectl-gettaint
[root@master K8S]# kubectl gettaint
NodeName Taints
master [map[effect:NoSchedule key:node-role.kubernetes.io/master]]
node-0001 <none>
port-forward
# 将一个或者多个本地端口转发到 pod
#-----------------------------------------#
[root@master K8S]# kubectl port-forward --address 0.0.0.0 pod/mypod 8080 80
Forwarding from 0.0.0.0:8080 -> 8080
Forwarding from 0.0.0.0:80 -> 80
#-----------------------------------------#
[root@master local]# curl http://master:8080
hello world.
proxy
# 运行一个 kubernetes API 服务器代理
#-----------------------------------------#
[root@master K8S]# kubectl proxy --port=80
Starting to serve on 127.0.0.1:80
#-----------------------------------------#
[root@master K8S]# curl http://127.0.0.1/version
{
"major": "1",
"minor": "22",
"gitVersion": "v1.22.3",
"gitCommit": "c92036820499fedefec0f847e2054d824aea6cd1",
"gitTreeState": "clean",
"buildDate": "2021-10-27T18:35:25Z",
"goVersion": "go1.16.9",
"compiler": "gc",
"platform": "linux/amd64"
}
replace
# 基于文件名或标准输入替换资源
#-----------------------------------------#
[root@master K8S]# kubectl replace --force -f mypod.yaml
pod "mypod" deleted
pod/mypod replaced
rollout
# 管理资源的上线
#-----------------------------------------#
[root@master K8S]# kubectl rollout history deployment
deployment.apps/myweb
REVISION CHANGE-CAUSE
1 httpd.v1
2 httpd.v2
[root@master K8S]# kubectl rollout undo deployment myweb --to-revision=1
deployment.apps/myweb rolled back
[root@master K8S]# kubectl rollout history deployment
deployment.apps/myweb
REVISION CHANGE-CAUSE
2 httpd.v2
3 httpd.v1
run
# 在集群中使用指定镜像启动容器
#-----------------------------------------#
[root@master K8S]# kubectl run mypod --image=registry:5000/myos:httpd
#-----------------------------------------#
---
apiVersion: v1
kind: Pod
metadata:
labels:
run: mypod
name: mypod
spec:
containers:
- image: registry:5000/myos:httpd
name: mypod
restartPolicy: Always
scale
# 为可扩充资源设置一个新副本数量
#-----------------------------------------#
[root@master K8S]# kubectl apply -f myDeploy.yaml
deployment.apps/myweb created
[root@master ~]# kubectl get deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE
myweb 1/1 1 1 21m
[root@master ~]# kubectl scale deployment myweb --replicas=3
deployment.apps/myweb scaled
[root@master ~]# kubectl get deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE
myweb 3/3 3 3 21m
set
# 为资源对象设置功能特性
#-----------------------------------------#
[root@master K8S]# kubectl set env pods --all --list
# Pod mypod, container linux
[root@master K8S]# kubectl set env deployment/myweb myEnv=prod
deployment.apps/myweb env updated
[root@master K8S]# kubectl exec -i -t myweb-6c645646c9-pqjc7 -- sh -c 'echo ${myEnv}'
prod
[root@master K8S]# kubectl get deployments.apps myweb -o wide
NAME READY AGE CONTAINERS IMAGES SELECTOR
myweb 1/1 25s httpd registry:5000/myos:httpd app=apache
[root@master K8S]# kubectl set image deployment/myweb httpd=registry:5000/myos:nginx
deployment.apps/myweb image updated
[root@master K8S]# kubectl get deployments.apps myweb -o wide
NAME READY AGE CONTAINERS IMAGES SELECTOR
myweb 1/1 45s httpd registry:5000/myos:nginx app=apache
taint
# 在一个或者多个节点上更新污点配置
#-----------------------------------------#
[root@master K8S]# kubectl get nodes -o custom-columns=NodeName:.metadata.name,Taints:.spec.taints
NodeName Taints
master [map[effect:NoSchedule key:node-role.kubernetes.io/master]]
node-0001 <none>
[root@master K8S]# kubectl taint node node-0001 k=v:PreferNoSchedule
node/node-0001 tainted
[root@master K8S]# kubectl get nodes -o custom-columns=NodeName:.metadata.name,Taints:.spec.taints
NodeName Taints
master [map[effect:NoSchedule key:node-role.kubernetes.io/master]]
node-0001 [map[effect:PreferNoSchedule key:k value:v]]
[root@master K8S]# kubectl taint node node-0001 k-
node/node-0001 untainted
[root@master K8S]# kubectl get nodes -o custom-columns=NodeName:.metadata.name,Taints:.spec.taints
NodeName Taints
master [map[effect:NoSchedule key:node-role.kubernetes.io/master]]
node-0001 <none>
top
# 显示资源（CPU /内存/存储）使用率
#-----------------------------------------#
[root@master K8S]# kubectl top nodes
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY%
master 90m 4% 1210Mi 14%
node-0001 45m 2% 931Mi 11%
[root@master K8S]# kubectl top pods
NAME CPU(cores) MEMORY(bytes)
mypod 5m 8Mi
[root@master K8S]#
uncordon
# 解除（cordon、drain）资源不可调度标记
#-----------------------------------------#
[root@master K8S]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 15h v1.22.3
node-0001 Ready,SchedulingDisabled node 15h v1.22.3
[root@master K8S]# kubectl uncordon node-0001
node/node-0001 uncordoned
[root@master K8S]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 15h v1.22.3
node-0001 Ready node 15h v1.22.3
version
# 显示客户端和服务器的版本信息
#-----------------------------------------#
[root@master K8S]# kubectl version -o yaml
clientVersion:
buildDate: "2021-10-27T18:41:28Z"
compiler: gc
gitCommit: c92036820499fedefec0f847e2054d824aea6cd1
gitTreeState: clean
gitVersion: v1.22.3
goVersion: go1.16.9
major: "1"
minor: "22"
platform: linux/amd64
serverVersion:
buildDate: "2021-10-27T18:35:25Z"
compiler: gc
gitCommit: c92036820499fedefec0f847e2054d824aea6cd1
gitTreeState: clean
gitVersion: v1.22.3
goVersion: go1.16.9
major: "1"
minor: "22"
platform: linux/amd64
wait
# 等待一个或多个资源达到某种状态
#-----------------------------------------#
---
kind: Pod
apiVersion: v1
metadata:
name: mypod
spec:
terminationGracePeriodSeconds: 0
initContainers:
- name: myinit
image: registry:5000/busybox:latest
imagePullPolicy: IfNotPresent
command: ["sleep", "10"]
containers:
- name: linux
image: registry:5000/busybox:latest
imagePullPolicy: IfNotPresent
command: ["sh", "-c"]
args:
- |
echo "hello world !!!" >/var/www/index.html
httpd -v -f -p 0.0.0.0:80 -h /var/www
restartPolicy: Always
#-----------------------------------------#
[root@master K8S]# kubectl replace --force -f mypod.yaml
pod "mypod" deleted
pod/mypod replaced
[root@master K8S]# time kubectl wait --for=condition=Ready pod/mypod
pod/mypod condition met
real 0m10.335s
user 0m0.034s
sys 0m0.008s
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