如何解决获取服务"default/frontend-svc"终结点时出错：本地存储中没有对象匹配键"default/frontend-svc"

Question

我知道以前有人问过这个问题，但上一个问题不适用于我的案例。我有2个部署和2个服务，我正在使用入口资源和nginx ingress controller

ingress.yaml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: frontend-ingress
annotations: 
kubernetes.io/ingress.class: nginx
spec:
rules:
- http:
paths:
- path: /api
backend:
serviceName: frontend-svc
servicePort: 3000
- path: /
backend:
serviceName: static-svc
servicePort: 80

下面定义了这两种服务，

services.yaml

apiVersion: v1
kind: Service
metadata:
labels:
app: frontend
name: frontend-svc
spec:
ports:
- port: 3000
protocol: TCP
targetPort: 3000
selector:
app: frontend
type: ClusterIP
---
apiVersion: v1
kind: Service
metadata:
labels:
app: static
name: static-svc
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: static
type: ClusterIP

部署如下所示，

apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: frontend
name: frontend
spec:
replicas: 2
selector:
matchLabels:
app: frontend
template:
metadata:
labels:
app: frontend
spec:
containers:
- image: magalixcorp/sample-api:v1
imagePullPolicy: IfNotPresent
name: frontend
env:
- name: REDIS_PASSWORD
valueFrom:
secretKeyRef:
name: redis-password
key: redis-password
volumeMounts:
- name: config-volume
mountPath: /app/config.json
subPath: config.json
volumes:
- name: config-volume
configMap:
name: app-config
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: static
name: static
spec:
replicas: 2
selector:
matchLabels:
app: static
template:
metadata:
labels:
app: static
spec:
containers:
- image: magalixcorp/static:v1
imagePullPolicy: IfNotPresent
name: static

我已经部署了一个使用helm的nginx控制器到AKS。这些路线根本不起作用。当我检查nginx控制器日志时，我得到了这个

W1109 16:30:33.892443       6 controller.go:849] Error obtaining Endpoints for Service "default/frontend-svc": no object matching key "default/frontend-svc" in local store
W1109 16:30:33.892478       6 controller.go:849] Error obtaining Endpoints for Service "default/static-svc": no object matching key "default/static-svc" in local store
I1109 16:30:33.929583       6 main.go:112] "successfully validated configuration, accepting" ingress="frontend-ingress/default"
W1109 16:30:33.935904       6 controller.go:849] Error obtaining Endpoints for Service "default/frontend-svc": no object matching key "default/frontend-svc" in local store
W1109 16:30:33.935930       6 controller.go:849] Error obtaining Endpoints for Service "default/static-svc": no object matching key "default/static-svc" in local store
I1109 16:30:33.935973       6 controller.go:144] "Configuration changes detected, backend reload required"
I1109 16:30:33.936084       6 event.go:282] Event(v1.ObjectReference{Kind:"Ingress", Namespace:"default", Name:"frontend-ingress", UID:"efde0161-c03f-49d4-8f2b-38e2ceaaf8a7", APIVersion:"networking.k8s.io/v1beta1", ResourceVersion:"7945", FieldPath:""}): type: 'Normal' reason: 'Sync' Scheduled for sync
I1109 16:30:34.005219       6 controller.go:161] "Backend successfully reloaded"
I1109 16:30:34.005615       6 event.go:282] Event(v1.ObjectReference{Kind:"Pod", Namespace:"nginx", Name:"nginx-ingress-nginx-controller-68f45f49f6-slnv7", UID:"7880b0be-a1ff-450d-b1c1-4cee11722a6b", APIVersion:"v1", ResourceVersion:"3538", FieldPath:""}): type: 'Normal' reason: 'RELOAD' NGINX reload triggered due to a change in configuration
I1109 16:30:37.269565       6 controller.go:144] "Configuration changes detected, backend reload required"
I1109 16:30:37.342929       6 controller.go:161] "Backend successfully reloaded"
I1109 16:30:37.343677       6 event.go:282] Event(v1.ObjectReference{Kind:"Pod", Namespace:"nginx", Name:"nginx-ingress-nginx-controller-68f45f49f6-slnv7", UID:"7880b0be-a1ff-450d-b1c1-4cee11722a6b", APIVersion:"v1", ResourceVersion:"3538", FieldPath:""}): type: 'Normal' reason: 'RELOAD' NGINX reload triggered due to a change in configuration
I1109 16:31:01.926983       6 status.go:290] "updating Ingress status" namespace="default" ingress="frontend-ingress" currentValue=[] newValue=[{IP: Hostname:a596c83cb03464004bcced0767dd5aa9-1681194742.us-east-1.elb.amazonaws.com}]
I1109 16:31:01.937928       6 event.go:282] Event(v1.ObjectReference{Kind:"Ingress", Namespace:"default", Name:"frontend-ingress", UID:"efde0161-c03f-49d4-8f2b-38e2ceaaf8a7", APIVersion:"networking.k8s.io/v1beta1", ResourceVersion:"8081", FieldPath:""}): type: 'Normal' reason: 'Sync' Scheduled for sync
10.0.1.165 - - [09/Nov/2020:16:32:18 +0000] "GET / HTTP/1.1" 200 1313 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0" 396 0.002 [default-static-svc-80] [] 10.0.3.144:80 1313 0.000 200 750627c05c4ca98a2bcd60ae8bbb8828
10.0.1.165 - - [09/Nov/2020:16:32:19 +0000] "GET /js/script.js HTTP/1.1" 200 314 "http://a596c83cb03464004bcced0767dd5aa9-1681194742.us-east-1.elb.amazonaws.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0" 397 0.001 [default-static-svc-80] [] 10.0.1.175:80 314 0.000 200 af72c4fdc493a489064307872636b662
10.0.1.165 - - [09/Nov/2020:16:32:20 +0000] "GET /favicon.ico HTTP/1.1" 404 153 "http://a596c83cb03464004bcced0767dd5aa9-1681194742.us-east-1.elb.amazonaws.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0" 407 0.002 [default-static-svc-80] [] 10.0.3.144:80 153 0.000 404 ba36f92120a41720842ba95e24b9975c
10.0.2.31 - - [09/Nov/2020:16:32:47 +0000] "GET /.env HTTP/1.1" 404 555 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36" 231 0.001 [default-static-svc-80] [] 10.0.1.175:80 555 0.000 404 d8ec13faad1d46c13401b397e2d80ad0
10.0.2.31 - - [09/Nov/2020:16:32:48 +0000] "POST / HTTP/1.1" 405 559 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36" 317 0.001 [default-static-svc-80] [] 10.0.1.175:80 559 0.000 405 567a4b2499fc816d72135445076bafda
10.0.1.165 - - [09/Nov/2020:16:32:53 +0000] "GET /api HTTP/1.1" 200 3 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0" 399 0.003 [default-frontend-svc-3000] [] 10.0.1.26:3000 3 0.000 200 8a92b9829d26dccb60f11a9c8537d831
10.0.3.231 - - [09/Nov/2020:16:34:37 +0000] "POST /api HTTP/1.1" 204 0 "-" "curl/7.64.1" 211 0.002 [default-frontend-svc-3000] [] 10.0.1.26:3000 0 0.000 204 cf837f8bc89c29f2d2b07ac317120220
10.0.2.31 - - [09/Nov/2020:16:34:55 +0000] "GET /api HTTP/1.1" 200 3 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0" 425 0.006 [default-frontend-svc-3000] [] 10.0.2.98:3000 3 0.004 200 a5757323ff32d8c4dbc56ef476798954

当我尝试：3000/api来POST或GET时，它不起作用。可能出了什么问题。我做错了什么。

Answer 1

试着清理一下。因此，只为您的前端创建一个部署。所以这个文件你会调用frontend-depl.yml，然后这样写：

apiVersion: apps/v1
kind: Deployment
metadata:
name: frontend-depl
spec:
replicas: 1
selector:
matchLabels:
app: frontend
template:
metadata:
labels:
app: frontend
spec:
containers:
- name: frontend
image: magalixcorp/sample-api:v1
---
apiVersion: v1
kind: Service
metadata:
name: frontend-srv
spec:
selector:
app: frontend
ports:
- name: frontend
protocol: TCP
port: 3000
targetPort: 3000

我建议这样做是为了保持yml文件的整洁，因为正如你所知，这一切都可能很快失控，故障排除可能会很痛苦。

此外，我会进入你的终端并运行：

$ kubectl get endpoints --namespace <namespace>
...
<namespace> <your-app-service>  <none> 21h

也就是说，看看你有什么终点。

问题还可能是您的标签选择器，这就是为什么我提供了yml文件的更干净版本，至少是frontend-depl文件，我会对您的其他yml文件使用相同的模式。

要了解有关标签选择器的更多信息，请执行以下操作：https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-选择器

Answer 2

我遇到了同样的问题，结果发现我瞄准了错误的IP地址。我将流量从VNet外部发送到我在这里找到的(外部(IP地址：

kubectl get ingress

我很困惑，因为当我用一个临时运行的Pod进行测试时，这个地址工作正常，该Pod只是从我的VNet中发出一个HTTP调用，然后终止。

然而，当我阅读Ingress Pod的日志时，我发现了一个不同的IP地址，它正在解析到

kubectl get endpoints

事实证明，这里列出的IP地址是我的Ingress控制器正在侦听的正确地址。因此，我将我的专用DNS配置为使用该IP地址，并解决了问题。