当前位置： 首页 > news >正文

如何建立网站教程合肥网站优化技术

news 2025/7/28 3:33:38
如何建立网站教程,合肥网站优化技术,手机网站什么技术开发,广东炒股配资网站开发在《研发工程师玩转Kubernetes——启动、存活和就绪探针》中，我们讲了就绪探针和服务之间的特殊关系。就绪探针检测失败并不代表整个程序处于“非存活”状态，可能只是短暂临时的不可以提供服务，比如CPU阶段性占满，导致就绪探针检测…

在《研发工程师玩转Kubernetes——启动、存活和就绪探针》中，我们讲了就绪探针和服务之间的特殊关系。就绪探针检测失败并不代表整个程序处于“非存活”状态，可能只是短暂临时的不可以提供服务，比如CPU阶段性占满，导致就绪探针检测超时而导致失败。这个时候就绪探针并不会向存活探针那样尝试重启容器，而只是简单的把它从何它关联的Service中摘除。

带Readiness Probe的Nginx

apiVersion: apps/v1
kind: Deployment
metadata:name: readiness-nginx-deployment
spec:selector:matchLabels:app: readiness-nginxreplicas: 2template:metadata:labels:app: readiness-nginxspec:containers:- name: readiness-nginx-containerimage: nginxports:- containerPort: 80command: ["/bin/sh", "-c", "sleep 3; touch /tempdir/readiness-nginx; while true; do sleep 5; done"]volumeMounts:- name:  probe-volumemountPath:  /tempdirreadinessProbe:exec:command:- cat- /tempdir/readiness-nginxinitialDelaySeconds: 2failureThreshold: 6periodSeconds: 1successThreshold: 1volumes:- name: probe-volumeemptyDir: medium: MemorysizeLimit: 1Gi

Nginx关联的Service

kind: Service
apiVersion: v1
metadata:name: readiness-nginx-service
spec:selector:app: readiness-nginxports:- protocol: TCPport: 80targetPort: 80

实验

创建上述组件，可以看到启动了下面的Pod

kubectl get pod -o wide

NAME                                          READY   STATUS    RESTARTS   AGE   IP             NODE      NOMINATED NODE   READINESS GATES
readiness-nginx-deployment-57b7fd5644-7x7wc   1/1     Running   0          25s   10.1.43.223    ubuntuc   <none>           <none>
readiness-nginx-deployment-57b7fd5644-lhszp   1/1     Running   0          25s   10.1.209.155   ubuntub   <none>           <none>

Service也绑定了这些IP。

kubectl describe endpoints readiness-nginx-service 

Name:         readiness-nginx-service
Namespace:    default
Labels:       <none>
Annotations:  endpoints.kubernetes.io/last-change-trigger-time: 2023-08-14T14:35:33Z
Subsets:Addresses:          10.1.209.155,10.1.43.223NotReadyAddresses:  <none>Ports:Name     Port  Protocol----     ----  --------<unset>  80    TCPEvents:  <none>

现在我们挑选一个容器（readiness-nginx-deployment-57b7fd5644-7x7wc，10.1.43.223），观察该容器的Event状态：

kubectl describe pod readiness-nginx-deployment-57b7fd5644-7x7wc

Name:             readiness-nginx-deployment-57b7fd5644-7x7wc
Namespace:        default
Priority:         0
Service Account:  default
Node:             ubuntuc/172.22.247.176
Start Time:       Mon, 14 Aug 2023 14:35:27 +0000
Labels:           app=readiness-nginxpod-template-hash=57b7fd5644
Annotations:      cni.projectcalico.org/containerID: c475d3e82ff0d5adbd35252ab990608ad75955f8d0862bb8b0c54ee60a0878ebcni.projectcalico.org/podIP: 10.1.43.223/32cni.projectcalico.org/podIPs: 10.1.43.223/32
Status:           Running
IP:               10.1.43.223
IPs:IP:           10.1.43.223
Controlled By:  ReplicaSet/readiness-nginx-deployment-57b7fd5644
Containers:readiness-nginx-container:Container ID:  containerd://5d82d8467bc6e0c8151e40ee3258d54bffec8659bcdad4a441848ea8f77a3223Image:         nginxImage ID:      docker.io/library/nginx@sha256:67f9a4f10d147a6e04629340e6493c9703300ca23a2f7f3aa56fe615d75d31caPort:          80/TCPHost Port:     0/TCPCommand:/bin/sh-csleep 3; touch /tempdir/readiness-nginx; while true; do sleep 5; doneState:          RunningStarted:      Mon, 14 Aug 2023 14:35:30 +0000Ready:          TrueRestart Count:  0Readiness:      exec [cat /tempdir/readiness-nginx] delay=2s timeout=1s period=1s #success=1 #failure=6Environment:    <none>Mounts:/tempdir from probe-volume (rw)/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-c4tcl (ro)
Conditions:Type              StatusInitialized       True Ready             True ContainersReady   True PodScheduled      True 
Volumes:probe-volume:Type:       EmptyDir (a temporary directory that shares a pod's lifetime)Medium:     MemorySizeLimit:  1Gikube-api-access-c4tcl:Type:                    Projected (a volume that contains injected data from multiple sources)TokenExpirationSeconds:  3607ConfigMapName:           kube-root-ca.crtConfigMapOptional:       <nil>DownwardAPI:             true
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  3m53s                  default-scheduler  Successfully assigned default/readiness-nginx-deployment-57b7fd5644-7x7wc to ubuntucNormal   Pulling    3m53s                  kubelet            Pulling image "nginx"Normal   Pulled     3m50s                  kubelet            Successfully pulled image "nginx" in 2.489885583s (2.489893984s including waiting)Normal   Created    3m50s                  kubelet            Created container readiness-nginx-containerNormal   Started    3m50s                  kubelet            Started container readiness-nginx-containerWarning  Unhealthy  3m48s (x2 over 3m48s)  kubelet            Readiness probe failed: cat: /tempdir/readiness-nginx: No such file or directory

可以看到就绪探针在第3次检测时就存在了，这个时候Pod的Ready和ContainersReady都是True的状态。

就绪->非就绪

现在我们删除就绪标志文件

kubectl exec pods/readiness-nginx-deployment-57b7fd5644-7x7wc --container readiness-nginx-container -- rm /tempdir/readiness-nginx

再观察其状态，可以发现

Name:             readiness-nginx-deployment-57b7fd5644-7x7wc
Namespace:        default
Priority:         0
Service Account:  default
Node:             ubuntuc/172.22.247.176
Start Time:       Mon, 14 Aug 2023 14:35:27 +0000
Labels:           app=readiness-nginxpod-template-hash=57b7fd5644
Annotations:      cni.projectcalico.org/containerID: c475d3e82ff0d5adbd35252ab990608ad75955f8d0862bb8b0c54ee60a0878ebcni.projectcalico.org/podIP: 10.1.43.223/32cni.projectcalico.org/podIPs: 10.1.43.223/32
Status:           Running
IP:               10.1.43.223
IPs:IP:           10.1.43.223
Controlled By:  ReplicaSet/readiness-nginx-deployment-57b7fd5644
Containers:readiness-nginx-container:Container ID:  containerd://5d82d8467bc6e0c8151e40ee3258d54bffec8659bcdad4a441848ea8f77a3223Image:         nginxImage ID:      docker.io/library/nginx@sha256:67f9a4f10d147a6e04629340e6493c9703300ca23a2f7f3aa56fe615d75d31caPort:          80/TCPHost Port:     0/TCPCommand:/bin/sh-csleep 3; touch /tempdir/readiness-nginx; while true; do sleep 5; doneState:          RunningStarted:      Mon, 14 Aug 2023 14:35:30 +0000Ready:          FalseRestart Count:  0Readiness:      exec [cat /tempdir/readiness-nginx] delay=2s timeout=1s period=1s #success=1 #failure=6Environment:    <none>Mounts:/tempdir from probe-volume (rw)/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-c4tcl (ro)
Conditions:Type              StatusInitialized       True Ready             False ContainersReady   False PodScheduled      True 
Volumes:probe-volume:Type:       EmptyDir (a temporary directory that shares a pod's lifetime)Medium:     MemorySizeLimit:  1Gikube-api-access-c4tcl:Type:                    Projected (a volume that contains injected data from multiple sources)TokenExpirationSeconds:  3607ConfigMapName:           kube-root-ca.crtConfigMapOptional:       <nil>DownwardAPI:             true
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----     ------     ----                ----     -------Warning  Unhealthy  7s (x22 over 6m6s)  kubelet  Readiness probe failed: cat: /tempdir/readiness-nginx: No such file or directory

可以看到Ready和ContainersReady都变成了False状态。
我们再观察Service

kubectl describe endpoints readiness-nginx-service 

Name:         readiness-nginx-service
Namespace:    default
Labels:       <none>
Annotations:  endpoints.kubernetes.io/last-change-trigger-time: 2023-08-14T14:41:18Z
Subsets:Addresses:          10.1.209.155NotReadyAddresses:  10.1.43.223Ports:Name     Port  Protocol----     ----  --------<unset>  80    TCPEvents:  <none>

可以看到被删除了就绪探针检测文件的Pod被从Service中摘掉了。

非就绪->就绪

我们再将检测文件还原

kubectl exec pods/readiness-nginx-deployment-57b7fd5644-7x7wc --container readiness-nginx-container -- touch /tempdir/readiness-nginx

观察对应Pod的状态，其Ready和ContainersReady又变成了True状态。

Name:             readiness-nginx-deployment-57b7fd5644-7x7wc
Namespace:        default
Priority:         0
Service Account:  default
Node:             ubuntuc/172.22.247.176
Start Time:       Mon, 14 Aug 2023 14:35:27 +0000
Labels:           app=readiness-nginxpod-template-hash=57b7fd5644
Annotations:      cni.projectcalico.org/containerID: c475d3e82ff0d5adbd35252ab990608ad75955f8d0862bb8b0c54ee60a0878ebcni.projectcalico.org/podIP: 10.1.43.223/32cni.projectcalico.org/podIPs: 10.1.43.223/32
Status:           Running
IP:               10.1.43.223
IPs:IP:           10.1.43.223
Controlled By:  ReplicaSet/readiness-nginx-deployment-57b7fd5644
Containers:readiness-nginx-container:Container ID:  containerd://5d82d8467bc6e0c8151e40ee3258d54bffec8659bcdad4a441848ea8f77a3223Image:         nginxImage ID:      docker.io/library/nginx@sha256:67f9a4f10d147a6e04629340e6493c9703300ca23a2f7f3aa56fe615d75d31caPort:          80/TCPHost Port:     0/TCPCommand:/bin/sh-csleep 3; touch /tempdir/readiness-nginx; while true; do sleep 5; doneState:          RunningStarted:      Mon, 14 Aug 2023 14:35:30 +0000Ready:          TrueRestart Count:  0Readiness:      exec [cat /tempdir/readiness-nginx] delay=2s timeout=1s period=1s #success=1 #failure=6Environment:    <none>Mounts:/tempdir from probe-volume (rw)/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-c4tcl (ro)
Conditions:Type              StatusInitialized       True Ready             True ContainersReady   True PodScheduled      True 
Volumes:probe-volume:Type:       EmptyDir (a temporary directory that shares a pod's lifetime)Medium:     MemorySizeLimit:  1Gikube-api-access-c4tcl:Type:                    Projected (a volume that contains injected data from multiple sources)TokenExpirationSeconds:  3607ConfigMapName:           kube-root-ca.crtConfigMapOptional:       <nil>DownwardAPI:             true
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----     ------     ----                  ----     -------Warning  Unhealthy  3m5s (x262 over 13m)  kubelet  Readiness probe failed: cat: /tempdir/readiness-nginx: No such file or directory

Service也重新将其加回来了。

Name:         readiness-nginx-service
Namespace:    default
Labels:       <none>
Annotations:  endpoints.kubernetes.io/last-change-trigger-time: 2023-08-14T14:48:23Z
Subsets:Addresses:          10.1.209.155,10.1.43.223NotReadyAddresses:  <none>Ports:Name     Port  Protocol----     ----  --------<unset>  80    TCPEvents:  <none>
http://www.yidumall.com/news/43691.html

相关文章：

  • 支付功能网站建设引流推广的句子
  • wordpress缩写是什么意思优化落实疫情防控新十条
  • 做dw网站图片怎么下载游戏推广员
  • 滕州网站建设深圳竞价托管公司
  • 做商品网站的教学视频教程网络推广优化网站
  • 布吉做棋牌网站建设实时疫情最新消息数据
  • 做IP授权的一般看什么网站太原搜索排名提升
  • hbuilder 怎么做企业网站东莞搜索优化十年乐云seo
  • wordpress的建站教程网站设计
  • 合肥 电子商务 网站建设超级seo外链工具
  • 刚建设的网站多久能在百度查到朋友圈广告投放价格表
  • 复兴区网络推广公司以下属于网站seo的内容是
  • 湖北网络推广seoseo实战培训教程
  • 知名网站建设加工百度app平台
  • 给公司做企业网站职业培训机构有哪些
  • 网站详情页用哪个软件做app网站推广平台
  • 专业制作网站费用网络销售平台有哪些
  • 村委会网站源码佛山网站建设维护
  • 做非洲出口的网站营销型企业网站
  • 白沟17网站一起做网店友情链接购买
  • 做公司网站需要几个域名百度seo引流怎么做
  • 好看的html页面模板泰州seo平台
  • 武汉做商城网站建设百度云登陆首页
  • 自己做的网站谁来维护百度学术官网入口
  • 如何进行营销型企业网站的优化关键词歌曲免费听
  • 深圳市住建设局网站优化方案官方网站
  • 邯郸景区网站制作苏州seo关键词优化排名
  • 网站部署到终端机怎么做seo网络优化是什么工作
  • 几级英语可以做外贸网站seo网站降权查询工具
  • 浅谈中兴电子商务网站建设郑州seo服务技术