GCP-Kubernetes入口后端服务不正常

Question

我在pod上部署了SAS Viya编程。这使SASStudio在端口80上运行。我正在尝试通过下面的yaml文件使用nodeport和Inete公开SAS Studio。但在GCP控制台中，后端服务显示不健康，如果我尝试访问Ip，它会遇到默认后端或找不到页面。我可以使用集群IP和节点IP以及端口号访问服务。

如果我使用LoadBalancer服务而不是入口，那么我可以使用LoadBalancer Ip访问该服务。

使用入口时，后端服务显示为不正常。

我在node Ip和nodeport Ip中使用了curl命令。下面是结果。

   [root@k8jumphost doc]# curl -ILS "10.142.0.19:30100"
    HTTP/1.1 302 Found
    Date: Fri, 01 Feb 2019 07:53:31 GMT
    Server: Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips
    Location: http://10.142.0.19:30100/SASStudio
    Content-Type: text/html; charset=iso-8859-1

    HTTP/1.1 302
    Date: Fri, 01 Feb 2019 07:53:32 GMT
    Server: Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips
    Location: /SASStudio/
    Transfer-Encoding: chunked

    HTTP/1.1 200
    Date: Fri, 01 Feb 2019 07:53:34 GMT
    Server: Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips
    Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data:;
    X-Content-Type-Options: nosniff
    X-XSS-Protection: 1; mode=block
    Content-Type: text/html;charset=UTF-8
    Content-Language: en-US
    Content-Length: 7836

    [root@k8jumphost doc]# cat sas-analytics-ingress.yaml
    ---
    apiVersion: extensions/v1beta1
    kind: Ingress
    metadata:
      name: sas-programming-ingress
      labels:
        app: sas-programming
    spec:
      rules:
      - host: sas-programming
        http:
          paths:
          - path: /
            backend:
              serviceName: sas-programming-svc-nodeport
              servicePort: 80


        [root@k8jumphost doc]# cat sas-analytics-nodeport.yaml
    ---

    apiVersion: v1
    kind: Service
    metadata:
      name: sas-programming-svc-nodeport
      labels:
        app: sas-programming
    spec:
      selector:
        app: sas-programming
      ports:
      - name: http
        nodePort: 30100
        port: 80
        targetPort: 80
      - name: cas
        nodePort: 30200
        port: 5570
        targetPort: 5570
      type: NodePort

[root@k8jumphost doc]# cat sas-analytics.yaml
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: sas-programming-deployment
  labels:
    app: sas-programming
spec:
  replicas: 1
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: sas-programming
    spec:
      securityContext:
        fsGroup: 1001
      hostname: sas-programming
      containers:
      - name: sas-programming
        image: <location of the image>
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 5570
        - containerPort: 80
        env:
        - name: CASENV_CAS_VIRTUAL_HOST
          value: "sas-programming"
        - name: CASENV_CAS_VIRTUAL_PORT
          value: "30300"

我怀疑/上的重定向导致了此错误。任何人都可以帮助我，什么应该添加到部署文件来克服这个错误。

Answer 1

我认为您在GCP中的后端不健康这一事实表明您的容器上可能没有健康endpoint。查看https://kubernetes.io/docs/concepts/services-networking/ingress/#loadbalancing.您需要readinessProbe和livenessProbe在您的部署yaml中。