Question

几个月前，我开始使用Kubernetes，实际上我将微服务迁移到了我的牧场者集群（RKE）。一切正常，我的部署也不错，服务也不错。我想使用入口。

一切看起来都不错，服务是通过入口找到的，而pod是通过服务找到的。但是，当我尝试访问网站时，入口控制器出现了404错误页面。

您可以看到我的两个路径的配置：一个是nginx，另一个是在grafana上。有人知道我该如何解决它，并使用ingress进行反向代理？

非常感谢您的帮助。

我尝试使用没有结果的重写目标，并且不建议使用add-base-url。

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    field.cattle.io/creatorId: user-cg5r7
    field.cattle.io/ingressState: '{"bXktaW5ncmVzcy9kZWZhdWx0L3d3dy5zY29sLWVhLm92aC8vbmdpbngvNDI=":""}'
    field.cattle.io/publicEndpoints: '[{"addresses":["51.68.226.21"],"port":80,"protocol":"HTTP","serviceName":"default:nginx-services","ingressName":"default:my-ingress","hostname":"www.scol-ea.ovh","path":"/nginx","allNodes":true}]'
  creationTimestamp: "2019-08-31T10:54:25Z"
  generation: 2
  labels:
    cattle.io/creator: or antoine
  name: my-ingress
  namespace: default
  resourceVersion: "106239"
  selfLink: /apis/extensions/v1beta1/namespaces/default/ingresses/my-ingress
  uid: b27b7b20-cbdd-11e9-b16b-fa163ea73397
spec:
  rules:
  - host: www.scol-ea.ovh
    http:
      paths:
      - backend:
          serviceName: nginx-sample
          servicePort: 80
        path: /nginx
      - backend:
          serviceName: prometheus-grafana
          servicePort: http
        path : /grafana

------------------------
apiVersion: v1
kind: Service
metadata:
  annotations:
    field.cattle.io/targetWorkloadIds: '["deployment:default:nginx-sample"]'
    workload.cattle.io/targetWorkloadIdNoop: "true"
    workload.cattle.io/workloadPortBased: "true"
  creationTimestamp: "2019-08-31T10:03:47Z"
  labels:
    cattle.io/creator: norman
  name: nginx-sample
  namespace: default
  ownerReferences:
  - apiVersion: apps/v1beta2
    controller: true
    kind: deployment
    name: nginx-sample
    uid: 57af9603-cb2a-11e9-b16b-fa163ea73397
  resourceVersion: "102071"
  selfLink: /api/v1/namespaces/default/services/nginx-sample
  uid: 9fffe98c-cbd6-11e9-b16b-fa163ea73397
spec:
  clusterIP: 10.43.183.187
  ports:
  - name: 80tcp02
    port: 80
    protocol: TCP
    targetPort: 80
  selector:
    workload.user.cattle.io/workloadselector: deployment-default-nginx-sample
  sessionAffinity: None
  type: ClusterIP

----------------------------
apiVersion: v1
kind: Service
metadata:
  creationTimestamp: "2019-08-30T13:44:00Z"
  labels:
    app: prometheus-grafana
    chart: grafana-0.0.31
    heritage: Tiller
    io.cattle.field/appId: prometheus
    release: prometheus
  name: prometheus-grafana
  namespace: default
  resourceVersion: "2536"
  selfLink: /api/v1/namespaces/default/services/prometheus-grafana
  uid: 38ebd878-cb2c-11e9-b16b-fa163ea73397
spec:
  clusterIP: 10.43.142.143
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 3000
  selector:
    app: prometheus-grafana
  sessionAffinity: None
  type: ClusterIP

Answer 1

实际上，Nginx Ingress Controller处理所有无法到达目标位置的请求，并将其发送到默认的backend，从而在default backend - 404页面中生成每个请求。

由于您已决定实现基于路径的路由方案，因此重写规则可以通过nginx.ingress.kubernetes.io/rewrite-target annotation来解决问题：

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$2
  labels:
    cattle.io/creator: or antoine
  name: my-ingress
  namespace: default
spec:
  rules:
  - host: www.scol-ea.ovh
    http:
      paths:
      - backend:
          serviceName: nginx-sample
          servicePort: 80
        path: /nginx(/|$)(.*)
      - backend:
          serviceName: prometheus-grafana
          servicePort: http
        path : /grafana(/|$)(.*)

在Ingress清单上方应用后，可以在以下重写示例中提供基于路径的路由：

www.scol-ea.ovh/nginx-> www.scol-ea.ovh /

www.scol-ea.ovh/grafana-> www.scol-ea.ovh /

我不建议在已发布的清单或任何其他数据对象（例如您的情况下的公共端点）之间共享任何用户敏感数据。

Answer 2

我相信您应该在Yaml中使用nginx.ingress.kubernetes.io/backend-protocol: HTTPS注释

Answer 3

如果您在kubernetes中将nginx用作部署代理并且遇到了问题，则以下配置可以解决重定向问题。

您可以在grafan.ini文件中包含以下变量，也可以将其公开为env变量，如下所示，

GF_SERVER_DOMAIN=abc.google.com
GF_SERVER_ROOT_URL=%(protocol)s://%(domain)s:/grafana

因此Grafana部署将如下图所示。

        apiVersion: apps/v1
        kind: Deployment
        metadata:
          name: grafana
          namespace: monitoring
        spec:
          replicas: 1
          selector:
            matchLabels:
              app: grafana
            spec:
              containers:
              - name: grafana
                image: grafana/grafana:latest
                env:
                - name: GF_SERVER_DOMAIN
                  value: "abc.google.com"
                - name: GF_SERVER_ROOT_URL
                  value: "%(protocol)s://%(domain)s:/grafana"

                ports:
                - name: grafana
                  containerPort: 3000
                resources:
                  limits:
                    memory: "2Gi"
                    cpu: "1000m"
                  requests: 
                    memory: "1Gi"
                    cpu: "500m"
                volumeMounts:
                  - mountPath: /var/lib/grafana
                    name: grafana-storage-volume
                  - mountPath: /etc/grafana/provisioning/datasources
                    name: grafana-datasources
                    readOnly: false

并且您必须如下更新nginx服务器位置块，

       location /grafana {
           proxy_pass http://grafana.monitoring.svc.cluster.local:3000;
           rewrite ^/grafana/(.*) /$1 break;
           proxy_set_header Host $host;
        }

如何修复入口404默认后端

3 个答案: