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我正在使用部署一个面向外的服务,该服务暴露在一个节点端口后面,然后是一个 istio 入口。部署使用手动边车注入。一旦部署、nodeport 和 ingress 运行起来,我就可以向 istio ingress 发出请求。

由于某些未知原因,该请求不会路由到我的部署,而是显示文本“上游不健康”。为什么会这样,是什么原因造成的?

我可以在 http 响应中看到状态码是 503(服务不可用),服务器是“特使”。部署正在运行,因为我可以将端口映射到它,并且一切都按预期工作。

4

4 回答 4

3

尽管这是由于不正确的 Istio 设置中的路由问题导致的一般性错误,但我将为遇到相同问题的任何人提供一般性解决方案/建议。

在我的情况下,问题是由于路由规则配置不正确,Kubernetes 原生服务正在运行,但是 Istio 路由规则配置不正确,因此 Istio 无法从入口路由到服务。

于 2018-09-10T04:23:48.223 回答
3

以防万一,像我一样,你会好奇......即使在我的场景中,错误的情况很明显......

错误原因: 我有两个版本的相同服务(v1 和 v2),以及一个使用权重配置了流量路由目标的 Istio VirtualService。然后,95% 进入 v1,5% 进入 v2。由于我还没有部署 v1,当然,错误“503 - no healthy upstream”显示了 95% 的请求

好吧,即便如此,我知道问题以及如何解决它(只需部署 v1),我想知道......但是,我怎样才能获得有关此错误的更多信息?我怎样才能更深入地分析这个错误以找出发生了什么?

这是使用 Istio 的配置命令行实用程序 istioctl 进行调查的一种方式:

# 1) Check the proxies status -->
  $ istioctl proxy-status
# Result -->
  NAME                                                   CDS        LDS        EDS        RDS          PILOT                       VERSION
  ...
  teachstore-course-v1-74f965bd84-8lmnf.development      SYNCED     SYNCED     SYNCED     SYNCED       istiod-86798869b8-bqw7c     1.5.0
  ...
  ...

# 2) Get the name outbound from JSON result using the proxy (service with the problem) -->
  $ istioctl proxy-config cluster teachstore-course-v1-74f965bd84-8lmnf.development --fqdn teachstore-student.development.svc.cluster.local -o json
# 2) If you have jq install locally (only what we need, already extracted) -->
  $ istioctl proxy-config cluster teachstore-course-v1-74f965bd84-8lmnf.development --fqdn teachstore-course.development.svc.cluster.local -o json | jq -r .[].name
# Result -->
  outbound|80||teachstore-course.development.svc.cluster.local
  inbound|80|9180-tcp|teachstore-course.development.svc.cluster.local
  outbound|80|v1|teachstore-course.development.svc.cluster.local
  outbound|80|v2|teachstore-course.development.svc.cluster.local

# 3) Check the endpoints of "outbound|80|v2|teachstore-course..." using v1 proxy -->
  $ istioctl proxy-config endpoints teachstore-course-v1-74f965bd84-8lmnf.development --cluster "outbound|80|v2|teachstore-course.development.svc.cluster.local"
# Result (the v2, 5% of the traffic route is ok, there are healthy targets) -->
  ENDPOINT             STATUS      OUTLIER CHECK     CLUSTER
  172.17.0.28:9180     HEALTHY     OK                outbound|80|v2|teachstore-course.development.svc.cluster.local
  172.17.0.29:9180     HEALTHY     OK                outbound|80|v2|teachstore-course.development.svc.cluster.local

# 4) However, for the v1 version "outbound|80|v1|teachstore-course..." -->
$ istioctl proxy-config endpoints teachstore-course-v1-74f965bd84-8lmnf.development --cluster "outbound|80|v1|teachstore-course.development.svc.cluster.local"
  ENDPOINT             STATUS      OUTLIER CHECK     CLUSTER
# Nothing! Emtpy, no Pods, that's explain the "no healthy upstream" 95% of time.
于 2020-05-30T22:02:07.423 回答
2

当我的 pod 处于ContainerCreating状态时,我遇到了这个问题。因此,它导致了 503 错误。同样作为@pegaldon,解释它也可能由于不正确的路由配置或用户没有创建网关而发生。

于 2019-05-29T12:27:47.770 回答
2

删除 destinationrules.networking.istio.io 并重新创建 virtualservice.networking.istio.io

[root@10-20-10-110 ~]# curl http://dprovider.example.com:31400/dw/provider/beat
no healthy upstream[root@10-20-10-110 ~]# 
[root@10-20-10-110 ~]# curl http://10.210.11.221:10100/dw/provider/beat
"该服务节点  10.210.11.221  心跳正常!"[root@10-20-10-110 ~]# 
[root@10-20-10-110 ~]# 
[root@10-20-10-110 ~]# cat /home/example_service_yaml/vs/dw-provider-service.yaml
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: dw-provider-service
  namespace: example
spec:
  hosts:
  - "dprovider.example.com"
  gateways:
  - example-gateway
  http:
  - route:
    - destination:
        host: dw-provider-service 
        port:
          number: 10100
        subset: "v1-0-0"
---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: dw-provider-service
  namespace: example
spec:
  host: dw-provider-service
  subsets:
  - name: "v1-0-0"
    labels:
      version: 1.0.0

[root@10-20-10-110 ~]# vi /home/example_service_yaml/vs/dw-provider-service.yaml 
[root@10-20-10-110 ~]# kubectl -n example get vs -o wide | grep dw                       
dw-collection-service    [example-gateway]   [dw.collection.example.com]                       72d
dw-platform-service      [example-gateway]   [dplatform.example.com]                           81d
dw-provider-service      [example-gateway]   [dprovider.example.com]                           21m
dw-sync-service          [example-gateway]   [dw-sync-service dsync.example.com]               34d
[root@10-20-10-110 ~]# kubectl -n example delete vs dw-provider-service 
virtualservice.networking.istio.io "dw-provider-service" deleted
[root@10-20-10-110 ~]# kubectl -n example delete d dw-provider-service   
daemonsets.apps                       deniers.config.istio.io               deployments.extensions                dogstatsds.config.istio.io            
daemonsets.extensions                 deployments.apps                      destinationrules.networking.istio.io  
[root@10-20-10-110 ~]# kubectl -n example delete destinationrules.networking.istio.io dw-provider-service 
destinationrule.networking.istio.io "dw-provider-service" deleted
[root@10-20-10-110 ~]# kubectl apply -f /home/example_service_yaml/vs/dw-provider-service.yaml 
virtualservice.networking.istio.io/dw-provider-service created
[root@10-20-10-110 ~]# curl http://dprovider.example.com:31400/dw/provider/beat
"该服务节点  10.210.11.221  心跳正常!"[root@10-20-10-110 ~]# 
[root@10-20-10-110 ~]# 

于 2019-11-20T07:54:03.410 回答