Kubectl基础命令
2024-06-22 06:02:26
Kubectl基础命令
- Kubectl 常用命令
- help 帮助信息
- kubect create
- kubectl run
- kubectl expose
- kubectl get
- kubectl delete
- explain
- edit
- scale
- autoscale
- cluster-info
- describe
- logs
- attach
- exec
- prot-forward
- cp
- label
- api-resources
- api-versions
- version
- 滚动更新、回滚
Kubectl 常用命令
help 帮助信息
# kubectl --help
kubectl controls the Kubernetes cluster manager.Find more information at: https://kubernetes.io/docs/reference/kubectl/overview/Basic Commands (Beginner):create Create a resource from a file or from stdin.expose 使用 replication controller, service, deployment 或者 pod 并暴露它作为一个新的Kubernetes Servicerun 在集群中运行一个指定的镜像set 为 objects 设置一个指定的特征Basic Commands (Intermediate):explain 查看资源的文档get 显示一个或更多 resourcesedit 在服务器上编辑一个资源delete Delete resources by filenames, stdin, resources and names, or by resources and label selectorDeploy Commands:rollout Manage the rollout of a resourcescale 为 Deployment, ReplicaSet, Replication Controller 或者 Job 设置一个新的副本数量autoscale 自动调整一个 Deployment, ReplicaSet, 或者 ReplicationController 的副本数量Cluster Management Commands:certificate 修改 certificate 资源.cluster-info 显示集群信息top Display Resource (CPU/Memory/Storage) usage.cordon 标记 node 为 unschedulableuncordon 标记 node 为 schedulabledrain Drain node in preparation for maintenancetaint 更新一个或者多个 node 上的 taintsTroubleshooting and Debugging Commands:describe 显示一个指定 resource 或者 group 的 resources 详情logs 输出容器在 pod 中的日志attach Attach 到一个运行中的 containerexec 在一个 container 中执行一个命令port-forward Forward one or more local ports to a podproxy 运行一个 proxy 到 Kubernetes API servercp 复制 files 和 directories 到 containers 和从容器中复制 files 和 directories.auth Inspect authorizationAdvanced Commands:diff Diff live version against would-be applied versionapply 通过文件名或标准输入流(stdin)对资源进行配置patch 使用 strategic merge patch 更新一个资源的 field(s)replace 通过 filename 或者 stdin替换一个资源wait Experimental: Wait for a specific condition on one or many resources.convert 在不同的 API versions 转换配置文件Settings Commands:label 更新在这个资源上的 labelsannotate 更新一个资源的注解completion Output shell completion code for the specified shell (bash or zsh)Other Commands:api-resources Print the supported API resources on the serverapi-versions Print the supported API versions on the server, in the form of "group/version"config 修改 kubeconfig 文件plugin Provides utilities for interacting with plugins.version 输出 client 和 server 的版本信息Usage:kubectl [flags] [options]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).
kubect create
创建一个资源从一个文件或标准输入
kubectl create deployment nginx --image=nginx:1.14
kubectl create -f my-nginx.yaml
kubectl run
在集群中运行一个指定的镜像,设置副本数5
kubectl run nginx --image=nginx:1.16 --port=80 --replicas 5
kubectl expose
nginx创建service，并通过Service的80端口转发至容器的8000端口上。
kubectl expose deployment/nginx --type="NodePort" --port=80 --name=nginx
kubectl get
显示一个或更多resources
kubectl get cs # 查看集群状态
kubectl get nodes # 查看集群节点信息
kubectl get ns # 查看集群命名空间
kubectl get svc -n kube-system # 查看指定命名空间的服务
kubectl get pod <pod-name> -o wide # 查看Pod详细信息
kubectl get pod <pod-name> -o yaml # 以yaml格式查看Pod详细信息
kubectl get pods # 查看资源对象，查看所有Pod列表
kubectl get rc,service # 查看资源对象，查看rc和service列表
kubectl get pod,svc,ep --show-labels # 查看pod,svc,ep能及标签信息
kubectl get all --all-namespaces # 查看所有的命名空间
kubectl delete
通过配置文件名、stdin、资源名称或label选择器来删除资源。
//删除所有pod
kubectl delete pods --all//强制删除pod
kubectl delete pod --grace-period=0 --force
explain
//获取资源及其字段的文档
[root@master ~]# kubectl explain pods
KIND: Pod
VERSION: v1DESCRIPTION:Pod is a collection of containers that can run on a host. This resource iscreated by clients and scheduled onto hosts.FIELDS:apiVersion <string>APIVersion defines the versioned schema of this representation of anobject. Servers should convert recognized schemas to the latest internalvalue, and may reject unrecognized values. More info:https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resourceskind <string>Kind is a string value representing the REST resource this objectrepresents. Servers may infer this from the endpoint the client submitsrequests to. Cannot be updated. In CamelCase. More info:https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kindsmetadata <Object>Standard object's metadata. More info:https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadataspec <Object>Specification of the desired behavior of the pod. More info:https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-statusstatus <Object>Most recently observed status of the pod. This data may not be up to date.Populated by the system. Read-only. More info:https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status
edit
编辑资源
//设置label标签
[root@master ~]# kubectl edit deployment nginx
# 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: apps/v1
kind: Deployment
metadata:annotations:deployment.kubernetes.io/revision: "1"creationTimestamp: "2021-12-21T03:35:26Z"generation: 1labels:app: nginxname: aaa
......//查看
[root@master ~]# kubectl describe deploy nginx
Name: nginx
Namespace: default
CreationTimestamp: Tue, 21 Dec 2021 11:35:26 +0800
Labels: app=nginxname=aaa #已经添加
Annotations: deployment.kubernetes.io/revision: 1
Selector: app=nginx
Replicas: 1 desired | 1 updated | 1 total | 1 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:Labels: app=nginxContainers:nginx:Image: nginxPort: <none>Host Port: <none>Environment: <none>Mounts: <none>Volumes: <none>
Conditions:Type Status Reason---- ------ ------Available True MinimumReplicasAvailableProgressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: nginx-6799fc88d8 (1/1 replicas created)
Events:Type Reason Age From Message---- ------ ---- ---- -------Normal ScalingReplicaSet 21m deployment-controller Scaled up replica set nginx-6799fc88d8 to 1
scale
[root@master ~]# kubectl scale deployment/nginx --replicas 3
deployment.apps/nginx scaled
[root@master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-6799fc88d8-c5lct 1/1 Running 0 12s
nginx-6799fc88d8-cxmwl 1/1 Running 0 12s
nginx-6799fc88d8-ggssg 1/1 Running 0 23m//设置只需要一个，它会随机删除两个
[root@master ~]# kubectl scale deployment/nginx --replicas 1
deployment.apps/nginx scaled
[root@master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-6799fc88d8-c5lct 0/1 Terminating 0 52s
nginx-6799fc88d8-cxmwl 0/1 Terminating 0 52s
nginx-6799fc88d8-ggssg 1/1 Running 0 24m
autoscale
//最少三个，最多五个
[root@master ~]# kubectl autoscale deployment/nginx --min 3 --max=5
horizontalpodautoscaler.autoscaling/nginx autoscaled//一个不满足设置的条件，它会自动创建两个满足最少三个
[root@master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-6799fc88d8-bzz45 0/1 ContainerCreating 0 1s
nginx-6799fc88d8-d8rtf 0/1 ContainerCreating 0 2s
nginx-6799fc88d8-ggssg 1/1 Running 0 26m
cluster-info
显示集群信息
[root@master ~]# kubectl cluster-info
Kubernetes control plane is running at https://192.168.172.142:6443
KubeDNS is running at https://192.168.172.142:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxyTo further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
describe
显示指定pod的详细信息
[root@master ~]# kubectl describe pod nginx
Name: nginx-6799fc88d8-bzz45
Namespace: default
Priority: 0
Node: node1.example.com/192.168.172.153
Start Time: Tue, 21 Dec 2021 12:02:12 +0800
Labels: app=nginxpod-template-hash=6799fc88d8
Annotations: <none>
Status: Running
IP: 10.244.1.6
IPs:IP: 10.244.1.6
Controlled By: ReplicaSet/nginx-6799fc88d8
Containers:nginx:Container ID: docker://316e8d07bfdca9320883ba7e74027b20b7658d21366c92a7f95bb17e2aa418cbImage: nginxImage ID: docker-pullable://nginx@sha256:d13dca1855de09e2fe392c58a66dd73d4ff4b71da4d1720bcf3f47b48c53ca1dPort: <none>Host Port: <none>State: RunningStarted: Tue, 21 Dec 2021 12:02:20 +0800Ready: TrueRestart Count: 0Environment: <none>Mounts:/var/run/secrets/kubernetes.io/serviceaccount from default-token-29mxh (ro)
Conditions:Type StatusInitialized True Ready True ContainersReady True PodScheduled True
Volumes:default-token-29mxh:Type: Secret (a volume populated by a Secret)SecretName: default-token-29mxhOptional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300snode.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:Type Reason Age From Message---- ------ ---- ---- -------Normal Scheduled 10m default-scheduler Successfully assigned default/nginx-6799fc88d8-bzz45 to node1.example.comNormal Pulling 10m kubelet Pulling image "nginx"Normal Pulled 10m kubelet Successfully pulled image "nginx" in 7.223539678sNormal Created 10m kubelet Created container nginxNormal Started 10m kubelet Started container nginx
logs
查看日志
[root@master ~]# kubectl logs deployment/nginx
Found 3 pods, using pod/nginx-6799fc88d8-ggssg
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2021/12/21 03:37:24 [notice] 1#1: using the "epoll" event method
2021/12/21 03:37:24 [notice] 1#1: nginx/1.21.4
2021/12/21 03:37:24 [notice] 1#1: built by gcc 10.2.1 20210110 (Debian 10.2.1-6)
2021/12/21 03:37:24 [notice] 1#1: OS: Linux 3.10.0-862.el7.x86_64
2021/12/21 03:37:24 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2021/12/21 03:37:24 [notice] 1#1: start worker processes
2021/12/21 03:37:24 [notice] 1#1: start worker process 31
2021/12/21 03:37:24 [notice] 1#1: start worker process 32
attach
[root@master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-6799fc88d8-bzz45 1/1 Running 0 14m
nginx-6799fc88d8-d8rtf 1/1 Running 0 14m
nginx-6799fc88d8-ggssg 1/1 Running 0 40m
[root@master ~]# kubectl attach nginx-6799fc88d8-bzz45
Defaulting container name to nginx.
Use 'kubectl describe pod/nginx-6799fc88d8-bzz45 -n default' to see all of the containers in this pod.
If you don't see a command prompt, try pressing enter.exec
执行容器命令,进入容器
[root@master ~]# kubectl exec nginx-6799fc88d8-bzz45 -- date
Tue Dec 21 04:18:13 UTC 2021//进入容器里面执行命令
[root@master ~]# kubectl exec -it nginx-6799fc88d8-bzz45 -- /bin/bash
root@nginx-6799fc88d8-bzz45:/# ls
bin docker-entrypoint.d home media proc sbin tmp
boot docker-entrypoint.sh lib mnt root srv usr
dev etc lib64 opt run sys var
root@nginx-6799fc88d8-bzz45:/# date
Tue Dec 21 04:18:40 UTC 2021
prot-forward
端口转发
[root@master ~]# kubectl port-forward deployment/web 80
Forwarding from 127.0.0.1:80 -> 80
Forwarding from [::1]:80 -> 80
Handling connection for 80[root@master ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 127.0.0.1:10248 0.0.0.0:*
LISTEN 0 128 127.0.0.1:10249 0.0.0.0:*
LISTEN 0 128 192.168.172.142:2379 0.0.0.0:*
LISTEN 0 128 127.0.0.1:2379 0.0.0.0:*
LISTEN 0 128 192.168.172.142:2380 0.0.0.0:*
LISTEN 0 128 127.0.0.1:2381 0.0.0.0:*
LISTEN 0 128 127.0.0.1:80 0.0.0.0:*
LISTEN 0 128 127.0.0.1:10257 0.0.0.0:*
LISTEN 0 128 127.0.0.1:10259 0.0.0.0:*
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 127.0.0.1:34813 0.0.0.0:*
LISTEN 0 128 *:10250 *:*
LISTEN 0 128 *:6443 *:*
LISTEN 0 128 [::1]:80 [::]:*
LISTEN 0 128 *:10256 *:*
LISTEN 0 128 [::]:22 [::]:*
[root@master ~]# curl 127.0.0.1
<html><body><h1>It works!</h1></body></html>//允许所有IP访问
[root@master ~]# kubectl port-forward --address 0.0.0.0 deployment/web 80
Forwarding from 0.0.0.0:80 -> 80
Handling connection for 80[root@master ~]# curl 192.168.172.142
<html><body><h1>It works!</h1></body></html>
cp
拷贝文件或目录到容器中，或者从容器内向外拷贝
[root@master ~]# kubectl cp anaconda-ks.cfg nginx-6799fc88d8-bzz45:/tmp/
[root@master ~]# kubectl exec nginx-6799fc88d8-bzz45 -- ls /tmp/
anaconda-ks.cfg
label
给资源设置、更新标签
[root@master ~]# kubectl run web --image httpd
pod/web created
[root@master ~]# kubectl describe pod web
Name: web
Namespace: default
Priority: 0
Node: node1.example.com/192.168.172.153
Start Time: Tue, 21 Dec 2021 12:30:48 +0800
Labels: run=web
Annotations: <none>
Status: Running
IP: 10.244.1.8
IPs:IP: 10.244.1.8//追加标签
[root@master ~]# kubectl label pods web app=test
pod/web labeled[root@master ~]# kubectl describe pod web
Name: web
Namespace: default
Priority: 0
Node: node1.example.com/192.168.172.153
Start Time: Tue, 21 Dec 2021 12:30:48 +0800
Labels: app=testrun=web
Annotations: <none>
Status: Running
IP: 10.244.1.8
IPs:IP: 10.244.1.8//更改标签
[root@master ~]# kubectl label --overwrite pods web app=aaa
pod/web labeled
[root@master ~]# kubectl describe pod web
Name: web
Namespace: default
Priority: 0
Node: node1.example.com/192.168.172.153
Start Time: Tue, 21 Dec 2021 12:30:48 +0800
Labels: app=aaarun=web
Annotations: <none>
Status: Running
IP: 10.244.1.8
IPs:IP: 10.244.1.8
api-resources
查看所有资源
[root@master ~]# kubectl api-resources
NAME SHORTNAMES APIVERSION NAMESPACED KIND
bindings v1 true Binding
componentstatuses cs v1 false ComponentStatus
configmaps cm v1 true ConfigMap
endpoints ep v1 true Endpoints
events ev v1 true Event
limitranges limits v1 true LimitRange
namespaces ns v1 false Namespace
nodes no v1 false Node
persistentvolumeclaims pvc v1 true PersistentVolumeClaim
persistentvolumes pv v1 false PersistentVolume
pods po v1 true Pod
podtemplates v1 true PodTemplate
replicationcontrollers rc v1 true ReplicationController
resourcequotas quota v1 true ResourceQuota
secrets v1 true Secret
serviceaccounts sa v1 true ServiceAccount
services svc v1 true Service
mutatingwebhookconfigurations admissionregistration.k8s.io/v1 false MutatingWebhookConfiguration
validatingwebhookconfigurations admissionregistration.k8s.io/v1 false ValidatingWebhookConfiguration
customresourcedefinitions crd,crds apiextensions.k8s.io/v1 false CustomResourceDefinition
apiservices apiregistration.k8s.io/v1 false APIService
controllerrevisions apps/v1 true ControllerRevision
daemonsets ds apps/v1 true DaemonSet
deployments deploy apps/v1 true Deployment
replicasets rs apps/v1 true ReplicaSet
statefulsets sts apps/v1 true StatefulSet
tokenreviews authentication.k8s.io/v1 false TokenReview
localsubjectaccessreviews authorization.k8s.io/v1 true LocalSubjectAccessReview
selfsubjectaccessreviews authorization.k8s.io/v1 false SelfSubjectAccessReview
selfsubjectrulesreviews authorization.k8s.io/v1 false SelfSubjectRulesReview
subjectaccessreviews authorization.k8s.io/v1 false SubjectAccessReview
horizontalpodautoscalers hpa autoscaling/v1 true HorizontalPodAutoscaler
cronjobs cj batch/v1beta1 true CronJob
jobs batch/v1 true Job
certificatesigningrequests csr certificates.k8s.io/v1 false CertificateSigningRequest
leases coordination.k8s.io/v1 true Lease
endpointslices discovery.k8s.io/v1beta1 true EndpointSlice
events ev events.k8s.io/v1 true Event
ingresses ing extensions/v1beta1 true Ingress
flowschemas flowcontrol.apiserver.k8s.io/v1beta1 false FlowSchema
prioritylevelconfigurations flowcontrol.apiserver.k8s.io/v1beta1 false PriorityLevelConfiguration
ingressclasses networking.k8s.io/v1 false IngressClass
ingresses ing networking.k8s.io/v1 true Ingress
networkpolicies netpol networking.k8s.io/v1 true NetworkPolicy
runtimeclasses node.k8s.io/v1 false RuntimeClass
poddisruptionbudgets pdb policy/v1beta1 true PodDisruptionBudget
podsecuritypolicies psp policy/v1beta1 false PodSecurityPolicy
clusterrolebindings rbac.authorization.k8s.io/v1 false ClusterRoleBinding
clusterroles rbac.authorization.k8s.io/v1 false ClusterRole
rolebindings rbac.authorization.k8s.io/v1 true RoleBinding
roles rbac.authorization.k8s.io/v1 true Role
priorityclasses pc scheduling.k8s.io/v1 false PriorityClass
csidrivers storage.k8s.io/v1 false CSIDriver
csinodes storage.k8s.io/v1 false CSINode
storageclasses sc storage.k8s.io/v1 false StorageClass
volumeattachments storage.k8s.io/v1 false VolumeAttachment
api-versions
API版本
[root@master ~]# kubectl api-versions
admissionregistration.k8s.io/v1
admissionregistration.k8s.io/v1beta1
apiextensions.k8s.io/v1
apiextensions.k8s.io/v1beta1
apiregistration.k8s.io/v1
apiregistration.k8s.io/v1beta1
apps/v1
authentication.k8s.io/v1
authentication.k8s.io/v1beta1
authorization.k8s.io/v1
authorization.k8s.io/v1beta1
autoscaling/v1
autoscaling/v2beta1
autoscaling/v2beta2
batch/v1
batch/v1beta1
certificates.k8s.io/v1
certificates.k8s.io/v1beta1
coordination.k8s.io/v1
coordination.k8s.io/v1beta1
discovery.k8s.io/v1beta1
events.k8s.io/v1
events.k8s.io/v1beta1
extensions/v1beta1
flowcontrol.apiserver.k8s.io/v1beta1
networking.k8s.io/v1
networking.k8s.io/v1beta1
node.k8s.io/v1
node.k8s.io/v1beta1
policy/v1beta1
rbac.authorization.k8s.io/v1
rbac.authorization.k8s.io/v1beta1
scheduling.k8s.io/v1
scheduling.k8s.io/v1beta1
storage.k8s.io/v1
storage.k8s.io/v1beta1
v1
version
[root@master ~]# kubectl version
Client Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.0", GitCommit:"af46c47ce925f4c4ad5cc8d1fca46c7b77d13b38", GitTreeState:"clean", BuildDate:"2020-12-08T17:59:43Z", GoVersion:"go1.15.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.0", GitCommit:"af46c47ce925f4c4ad5cc8d1fca46c7b77d13b38", GitTreeState:"clean", BuildDate:"2020-12-08T17:51:19Z", GoVersion:"go1.15.5", Compiler:"gc", Platform:"linux/amd64"}
滚动更新、回滚
用Dockerfile制作两个版本镜像
[root@master httpd]# cd
[root@master httpd]# vim Dockerfile
FROM busyboxRUN mkdir /data && \echo "test page on jjyy" > /data/index.html
ENTRYPOINT ["/bin/httpd","-f","-h","/data"][root@master ~]# docker build -t httpd:v0.1 httpd/
Sending build context to Docker daemon 2.048kB
Step 1/3 : FROM busybox
latest: Pulling from library/busybox
3cb635b06aa2: Pull complete
Digest: sha256:b5cfd4befc119a590ca1a81d6bb0fa1fb19f1fbebd0397f25fae164abe1e8a6a
Status: Downloaded newer image for busybox:latest---> ffe9d497c324
Step 2/3 : RUN mkdir /data && echo "test page on jjyy" > /data/index.html---> Running in a2570ee76392
Removing intermediate container a2570ee76392---> b3a39a7c5523
Step 3/3 : ENTRYPOINT ["/bin/httpd","-f","-h","/data"]---> Running in b45bae5f1bcb
Removing intermediate container b45bae5f1bcb---> e550687cd0fa
Successfully built e550687cd0fa
Successfully tagged httpd:v0.1[root@master ~]# cat httpd/Dockerfile
FROM busyboxRUN mkdir /data && \echo "test page on tom" > /data/index.html
ENTRYPOINT ["/bin/httpd","-f","-h","/data"][root@master ~]# docker build -t httpd:v0.2 httpd/
Sending build context to Docker daemon 2.048kB
Error response from daemon: dockerfile parse error line 1: unknown instruction: M
[root@master ~]# vim httpd/Dockerfile
[root@master ~]# docker build -t httpd:v0.2 httpd/
Sending build context to Docker daemon 2.048kB
Step 1/3 : FROM busybox---> ffe9d497c324
Step 2/3 : RUN mkdir /data && echo "test page on tom" > /data/index.html---> Running in 5f4a401c28da
Removing intermediate container 5f4a401c28da---> 3e594480ee7a
Step 3/3 : ENTRYPOINT ["/bin/httpd","-f","-h","/data"]---> Running in 74294b76b72c
Removing intermediate container 74294b76b72c---> 69bceebf8f0c
Successfully built 69bceebf8f0c
Successfully tagged httpd:v0.2
滚动更新、回滚
//用k8s运行镜像
[root@master ~]# kubectl create deploy httpd --image 1968046xux/httpd:v0.1 --replicas 3
deployment.apps/httpd created[root@master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
httpd-7fd5bf7f4f-bkz94 1/1 Running 0 50s
httpd-7fd5bf7f4f-dqz28 1/1 Running 0 50s
httpd-7fd5bf7f4f-wgsgn 1/1 Running 0 50s#暴露端口号
[root@master ~]# kubectl expose deploy httpd --port 80 --type NodePort
service/httpd exposed#访问
[root@master ~]# curl 10.103.211.67
test page on jjyy//更新
[root@master ~]# kubectl set image deploy/httpd httpd=1968046xux/httpd:v0.2
deployment.apps/httpd image updated[root@master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
httpd-8cu7ft6w7-awdnd 1/1 ContainerCreating 0 3s
httpd-9b8f648df-4fl48 1/1 Running 0 6m59s
httpd-9b8f648df-j85cp 1/1 Running 0 6m59s
httpd-9b8f648df-nftfn 1/1 Running 0 6m59s#已经更新了
[root@master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
httpd-8cu7ft6w7-awdnd 1/1 Running 0 6m59s
httpd-8cu7ft6w7-3b33b 1/1 Running 0 6m59s
httpd-8cu7ft6w7-nx38v 1/1 Running 0 6m59s
#访问
[root@master ~]# curl 10.103.211.67
test page on tom//回滚（来回滚）
[root@master ~]# kubectl rollout undo deploy/httpd
deployment.apps/httpd rolled back[root@master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
httpd-9b8f648df-wx4wr 1/1 Running 0 30s
httpd-9b8f648df-v55by 1/1 Running 0 27s
httpd-9b8f648df-fc3c4 1/1 Running 0 60s[root@master ~]# curl 10.103.211.67
test page on jjyy//回滚到上一个版本
[root@master ~]# kubectl rollout undo deploy/httpd
deployment.apps/httpd rolled back
[root@master ~]# curl 10.103.211.67
test page on tom
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