MicroK8S部署Web服务器

分类：编程问答

如何解决MicroK8S部署Web服务器

我正在玩microk8，并且正在尝试部署nextcloud以使其更加熟悉。但是nextcloud的部署进行得很好，我在为此设置入口方面面临一些问题。也许您可以看看我的清单和入口资源，并帮助我找到问题所在。

这是部署文件：

apiVersion: v1
kind: Service
metadata:
  namespace: nextcloud
  name: nextcloud-service
  labels:
    run: nextcloud-app
spec:
  ports:
    - port: 80
      targetPort: 8080
  selector:
    run: nextcloud-app
---
apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: nextcloud
  name: nextcloud-deployment
  labels:
    app: nextcloud-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nextcloud-app
  template:
    metadata:
      labels:
        app: nextcloud-app
    spec:
      containers:
      - image: nextcloud:latest
        name: nextcloud
        env:
        - name: NEXTCLOUD_ADMIN_USER
          valueFrom:
            configMapKeyRef:
              name: nextcloud-configuration
              key: nextcloud_admin_user
        - name: NEXTCLOUD_ADMIN_PASSWORD
          valueFrom:
            secretKeyRef:
              name: nextcloud-secret
              key: admin_password
        ports:
        - containerPort: 8080
          name: http
        volumeMounts:
        - name: nextcloud-pv
          mountPath: /var/www/html/data
      volumes:
      - name: nextcloud-pv
        persistentVolumeClaim:
          claimName: nextcloud-pv-claim

这是入口资源文件：

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nextcloud-ingress
  namespace: nextcloud
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - http:
      paths:
      - path: /nextcloud
        pathType: Prefix
        backend:
          service:
            name: nextcloud-service
            port:
              number: 80

在我的microk8上启用了以下插件：

  • dns
  • ingress

现在，我想向您展示一些k8s输出。

kubectl -n nextcloud描述svc nextcloud-service 

Name:              nextcloud-service
Namespace:         nextcloud
Labels:            run=nextcloud-app
Annotations:       <none>
Selector:          run=nextcloud-app
Type:              ClusterIP
IP:                10.152.183.189
Port:              <unset>  80/TCP
TargetPort:        8080/TCP
Endpoints:         <none>
Session Affinity:  None
Events:            <none>

kubectl -n nextcloud描述入口nextcloud-ingress 

Name:             nextcloud-ingress
Namespace:        nextcloud
Address:          192.168.60.2
Default backend:  default-http-backend:80 (<error: endpoints "default-http-backend" not found>)
Rules:
  Host        Path  Backends
  ----        ----  --------
  *           
              /nextcloud   nextcloud-service:80   <none>)
Annotations:  nginx.ingress.kubernetes.io/rewrite-target: /
Events:
  Type    Reason  Age                 From                      Message
  ----    ------  ----                ----                      -------
  Normal  CREATE  11m                 nginx-ingress-controller  Ingress nextcloud/nextcloud-ingress
  Normal  CREATE  11m                 nginx-ingress-controller  Ingress nextcloud/nextcloud-ingress
  Normal  UPDATE  63s (x22 over 11m)  nginx-ingress-controller  Ingress nextcloud/nextcloud-ingress
  Normal  UPDATE  63s (x22 over 11m)  nginx-ingress-controller  Ingress nextcloud/nextcloud-ingress

kubectl -n入口日志pod / nginx-ingress-microk8s-controller-k2q6c 

I1024 19:56:37.955953       6 status.go:275] updating Ingress nextcloud/nextcloud-ingress status from [{192.168.60.2 }] to [{127.0.0.1 }]
W1024 19:56:37.963861       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 19:56:37.964276       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",Namespace:"nextcloud",Name:"nextcloud-ingress",UID:"913dcf73-e5df-4ad9-a23b-22d6ad8b83a7",APIVersion:"networking.k8s.io/v1beta1",ResourceVersion:"192287",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
I1024 19:56:39.491960       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"192295",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
W1024 19:56:41.297313       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 19:57:37.955734       6 status.go:275] updating Ingress nextcloud/nextcloud-ingress status from [{192.168.60.2 }] to [{127.0.0.1 }]
W1024 19:57:37.969214       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 19:57:37.969711       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"192441",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
I1024 19:57:39.492467       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"192446",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
W1024 19:57:41.302640       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 19:58:37.956198       6 status.go:275] updating Ingress nextcloud/nextcloud-ingress status from [{192.168.60.2 }] to [{127.0.0.1 }]
W1024 19:58:37.964655       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 19:58:37.965017       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"192592",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
I1024 19:58:39.493436       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"192600",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
W1024 19:58:41.298097       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 19:59:37.955569       6 status.go:275] updating Ingress nextcloud/nextcloud-ingress status from [{192.168.60.2 }] to [{127.0.0.1 }]
W1024 19:59:37.964975       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 19:59:37.965045       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"192746",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
I1024 19:59:39.491840       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"192750",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
W1024 19:59:41.298496       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 20:00:37.956061       6 status.go:275] updating Ingress nextcloud/nextcloud-ingress status from [{192.168.60.2 }] to [{127.0.0.1 }]
W1024 20:00:37.965139       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 20:00:37.965212       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"192896",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
I1024 20:00:39.489924       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"192904",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
W1024 20:00:41.298762       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 20:01:37.955481       6 status.go:275] updating Ingress nextcloud/nextcloud-ingress status from [{192.168.60.2 }] to [{127.0.0.1 }]
W1024 20:01:37.963612       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.
I1024 20:01:37.963681       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"193049",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
I1024 20:01:39.490523       6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",ResourceVersion:"193058",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress
W1024 20:01:41.297141       6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint.

呼叫http://k8s.ip/nextcloud时得到503。我有什么想法吗？

解决方法

我在评论中发布：

您收到503代码，因为您的Service-> .spec.selector（run: nextcloud-app）和Deployment-> .spec.selector.matchLabels（{ {1}}）。您将需要使它们相同。在描述服务时也可以看到它（无端点）。

此特定设置中的问题是app: nextcloud-app中的matchLabel和Deployment中的selector之间不匹配：

Service 

Deployment

spec: replicas: 1 selector: matchLabels: app: nextcloud-app # <-- HERE! ：

Service

要解决此问题，您需要使它们都匹配（例如）：

  • spec: ports: - port: 80 targetPort: 8080 selector: run: nextcloud-app # <-- HERE! 中的app: nextcloud-app和Deployment

一些识别不匹配选择器的方法（通过使用帖子中的示例）：

  • 如上所述手动检查Service定义
  • YAML 
$ kubectl -n nextcloud describe svc nextcloud-service

Name: nextcloud-service Namespace: nextcloud Labels: run=nextcloud-app Annotations: <none> Selector: run=nextcloud-app Type: ClusterIP IP: 10.152.183.189 Port: <unset> 80/TCP TargetPort: 8080/TCP Endpoints: <none> # <-- HERE Session Affinity: None Events: <none> 上方显示已创建服务，但没有describe（endpoints）来向其发送流量。

没有任何端点也可以与Pods不是Pod或不在Ready状态这一事实有关

  • Healthy 
$ kubectl get endpoint -n nextcloud
  • 来自NAME ENDPOINTS AGE nextcloud-service <none> 1m 控制器的日志（张贴在问题中）：
Ingress

I1024 19:56:37.955953 6 status.go:275] updating Ingress nextcloud/nextcloud-ingress status from [{192.168.60.2 }] to [{127.0.0.1 }] W1024 19:56:37.963861 6 controller.go:909] Service "nextcloud/nextcloud-service" does not have any active Endpoint. I1024 19:56:37.964276 6 event.go:278] Event(v1.ObjectReference{Kind:"Ingress",Namespace:"nextcloud",Name:"nextcloud-ingress",UID:"913dcf73-e5df-4ad9-a23b-22d6ad8b83a7",APIVersion:"networking.k8s.io/v1beta1",ResourceVersion:"192287",FieldPath:""}): type: 'Normal' reason: 'UPDATE' Ingress nextcloud/nextcloud-ingress

我鼓励您检查nextcloud的Helm图表：

其他资源：

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