关于kubernetes:kubernetes核心实战八-service

13、service

四层网络负载

创立

[root@k8s-master-node1 ~/yaml/test]# [root@k8s-master-node1 ~/yaml/test]# vim my-app.yaml[root@k8s-master-node1 ~/yaml/test]# cat my-app.yamlapiVersion: apps/v1kind: Deploymentmetadata:  labels:    app: my-dep  name: my-depspec:  replicas: 3  selector:    matchLabels:      app: my-dep  template:    metadata:      labels:        app: my-dep    spec:      containers:      - image: nginx        name: nginx[root@k8s-master-node1 ~/yaml/test]# kubectl  apply -f my-app.yaml deployment.apps/my-dep created[root@k8s-master-node1 ~/yaml/test]# [root@k8s-master-node1 ~/yaml/test]# kubectl  get deployments.apps NAME                     READY   UP-TO-DATE   AVAILABLE   AGEingress-demo-app         2/2     2            2           155mmy-dep                   3/3     3            3           71snfs-client-provisioner   1/1     1            1           140m[root@k8s-master-node1 ~/yaml/test]#

应用标签查找

[root@k8s-master-node1 ~/yaml/test]# kubectl  get pod --show-labels NAME                                     READY   STATUS              RESTARTS   AGE     LABELShello-27285682--1-q2p6x                  0/1     Completed           0          3m15s   controller-uid=5e700c2e-29b3-4099-be17-b005d8077284,job-name=hello-27285682hello-27285683--1-b2qgn                  0/1     Completed           0          2m15s   controller-uid=d7455e28-bd37-4fdf-bf47-de7ae6b4b7bb,job-name=hello-27285683hello-27285684--1-glsmp                  0/1     Completed           0          75s     controller-uid=9cc7f28d-e780-49fb-a23a-ab725413ea8a,job-name=hello-27285684hello-27285685--1-s7ws5                  0/1     ContainerCreating   0          15s     controller-uid=169e3631-6981-4df8-bfee-6a4f4632b713,job-name=hello-27285685ingress-demo-app-694bf5d965-8rh7f        1/1     Running             0          157m    app=ingress-demo-app,pod-template-hash=694bf5d965ingress-demo-app-694bf5d965-swkpb        1/1     Running             0          157m    app=ingress-demo-app,pod-template-hash=694bf5d965my-dep-5b7868d854-kzflw                  1/1     Running             0          2m34s   app=my-dep,pod-template-hash=5b7868d854my-dep-5b7868d854-pfhps                  1/1     Running             0          2m34s   app=my-dep,pod-template-hash=5b7868d854my-dep-5b7868d854-v67ll                  1/1     Running             0          2m34s   app=my-dep,pod-template-hash=5b7868d854nfs-client-provisioner-dc5789f74-5bznq   1/1     Running             0          141m    app=nfs-client-provisioner,pod-template-hash=dc5789f74pi--1-k5cbq                              0/1     Completed           0          25m     controller-uid=2ecfcafd-f848-403b-b37f-9c145a0dc8cc,job-name=piredis-app-86g4q                          1/1     Running             0          27m     controller-revision-hash=77c8899f5d,name=fluentd-redis,pod-template-generation=1redis-app-rt92n                          1/1     Running             0          27m     controller-revision-hash=77c8899f5d,name=fluentd-redis,pod-template-generation=1redis-app-vkzft                          1/1     Running             0          27m     controller-revision-hash=77c8899f5d,name=fluentd-redis,pod-template-generation=1web-0                                    1/1     Running             0          91m     app=nginx,controller-revision-hash=web-57c5cc66df,statefulset.kubernetes.io/pod-name=web-0web-1                                    1/1     Running             0          91m     app=nginx,controller-revision-hash=web-57c5cc66df,statefulset.kubernetes.io/pod-name=web-1web-2                                    1/1     Running             0          90m     app=nginx,controller-revision-hash=web-57c5cc66df,statefulset.kubernetes.io/pod-name=web-2[root@k8s-master-node1 ~/yaml/test]# [root@k8s-master-node1 ~/yaml/test]# [root@k8s-master-node1 ~/yaml/test]# [root@k8s-master-node1 ~/yaml/test]# kubectl get pod -l app=my-depNAME                      READY   STATUS    RESTARTS   AGEmy-dep-5b7868d854-kzflw   1/1     Running   0          2m42smy-dep-5b7868d854-pfhps   1/1     Running   0          2m42smy-dep-5b7868d854-v67ll   1/1     Running   0          2m42s[root@k8s-master-node1 ~/yaml/test]#

命令行裸露端口

[root@k8s-master-node1 ~/yaml/test]# kubectl expose deployment my-dep --port=8000 --target-port=80service/my-dep exposed[root@k8s-master-node1 ~/yaml/test]# [root@k8s-master-node1 ~/yaml/test]# kubectl  get serviceNAME               TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGEingress-demo-app   ClusterIP   10.96.145.40    <none>        80/TCP     158mkubernetes         ClusterIP   10.96.0.1       <none>        443/TCP    160mmy-dep             ClusterIP   10.96.241.162   <none>        8000/TCP   11snginx              ClusterIP   None            <none>        80/TCP     92m[root@k8s-master-node1 ~/yaml/test]#

yaml文件裸露端口

apiVersion: v1kind: Servicemetadata:  labels:    app: my-dep  name: my-depspec:  selector:    app: my-dep  ports:  - port: 8000    protocol: TCP    targetPort: 80

ClusterIP形式裸露

命令行

kubectl expose deployment my-dep --port=8000 --target-port=80 --type=ClusterIP

yaml形式

apiVersion: v1kind: Servicemetadata:  labels:    app: my-dep  name: my-depspec:  ports:  - port: 8000    protocol: TCP    targetPort: 80  selector:    app: my-dep  type: ClusterIP

拜访测试

[root@k8s-master-node1 ~/yaml/test]# curl -I  10.96.241.162:8000HTTP/1.1 200 OKServer: nginx/1.21.4Date: Wed, 17 Nov 2021 09:30:27 GMTContent-Type: text/htmlContent-Length: 615Last-Modified: Tue, 02 Nov 2021 14:49:22 GMTConnection: keep-aliveETag: "61814ff2-267"Accept-Ranges: bytes[root@k8s-master-node1 ~/yaml/test]#

NodePort形式裸露

命令行

kubectl expose deployment my-dep --port=8000 --target-port=80 --type=NodePort

yaml形式

apiVersion: v1kind: Servicemetadata:  labels:    app: my-dep  name: my-depspec:  ports:  - port: 8000    protocol: TCP    targetPort: 80  selector:    app: my-dep  type: NodePort

查看service

[root@k8s-master-node1 ~/yaml/test]# kubectl  get serviceNAME               TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGEingress-demo-app   ClusterIP   10.96.145.40    <none>        80/TCP           165mkubernetes         ClusterIP   10.96.0.1       <none>        443/TCP          167mmy-dep             NodePort    10.96.241.162   <none>        8000:32306/TCP   7m13snginx              ClusterIP   None            <none>        80/TCP           99m[root@k8s-master-node1 ~/yaml/test]#

拜访测试

应用kubernetes任何node的ip都能够拜访

[root@k8s-master-node1 ~/yaml/test]# curl -I 192.168.1.62:32306HTTP/1.1 200 OKServer: nginx/1.21.4Date: Wed, 17 Nov 2021 09:36:50 GMTContent-Type: text/htmlContent-Length: 615Last-Modified: Tue, 02 Nov 2021 14:49:22 GMTConnection: keep-aliveETag: "61814ff2-267"Accept-Ranges: bytes[root@k8s-master-node1 ~/yaml/test]# curl -I 192.168.1.61:32306HTTP/1.1 200 OKServer: nginx/1.21.4Date: Wed, 17 Nov 2021 09:36:53 GMTContent-Type: text/htmlContent-Length: 615Last-Modified: Tue, 02 Nov 2021 14:49:22 GMTConnection: keep-aliveETag: "61814ff2-267"Accept-Ranges: bytes[root@k8s-master-node1 ~/yaml/test]# curl -I 192.168.1.63:32306HTTP/1.1 200 OKServer: nginx/1.21.4Date: Wed, 17 Nov 2021 09:36:56 GMTContent-Type: text/htmlContent-Length: 615Last-Modified: Tue, 02 Nov 2021 14:49:22 GMTConnection: keep-aliveETag: "61814ff2-267"Accept-Ranges: bytes[root@k8s-master-node1 ~/yaml/test]#

https://blog.csdn.net/qq_3392...

https://my.oschina.net/u/3981543

https://www.zhihu.com/people/...

https://segmentfault.com/u/hp...

https://juejin.cn/user/331578...

https://space.bilibili.com/35...

https://cloud.tencent.com/dev...

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