我很难弄清楚为什么 GKE 上的入口在项目部署期间返回 502 错误和超时。
为了更好地理解这个问题,我设置了一个基本的hello 应用程序,它采用相同的工作流程。
这是完整的清单:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: helloapp
labels:
app: helloapp
spec:
replicas: 3
template:
metadata:
labels:
app: helloapp
spec:
containers:
- name: helloapp
image: gcr.io/${GCLOUD_PROJECT_ID}/helloapp:${HELLOAPP_VERSION}
imagePullPolicy: Always
ports:
- name: http-server
containerPort: 8080
readinessProbe:
httpGet:
path: /sys/health
port: 8080
livenessProbe:
httpGet:
path: /sys/health
port: 8080
---
apiVersion: v1
kind: Service
metadata:
name: helloapp
labels:
app: helloapp
spec:
type: NodePort
externalTrafficPolicy: Local
ports:
- port: 80
targetPort: http-server
selector:
app: helloapp
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: helloapp-http
spec:
backend:
serviceName: helloapp
servicePort: 80
其中包含一个入口、一个服务和针对 Pod 的定制探针。
该应用程序是用Go编写的简单的 hello world 应用程序。
在部署期间,如果我围攻我的应用程序的入口运行状况检查并且我注意到:
HTTP/1.1 502 9.02 secs: 332 bytes ==> GET /sys/health
HTTP/1.1 502 9.10 secs: 332 bytes ==> GET /sys/health
HTTP/1.1 200 4.70 secs: 473 bytes ==> GET /sys/health
HTTP/1.1 200 4.56 secs: 475 bytes ==> GET /sys/health
HTTP/1.1 200 0.01 secs: 475 bytes ==> GET /sys/health
HTTP/1.1 200 0.01 secs: 476 bytes ==> GET /sys/health
HTTP/1.1 200 0.03 secs: 475 bytes ==> GET /sys/health
HTTP/1.1 200 0.01 secs: 474 bytes ==> GET /sys/health
HTTP/1.1 200 4.58 secs: 475 bytes ==> GET /sys/health
HTTP/1.1 200 4.51 secs: 474 bytes ==> GET /sys/health
HTTP/1.1 200 0.01 secs: 475 bytes ==> GET /sys/health
HTTP/1.1 200 0.01 secs: 475 bytes ==> GET /sys/health
HTTP/1.1 200 4.83 secs: 474 bytes ==> GET /sys/health
HTTP/1.1 502 9.07 secs: 332 bytes ==> GET /sys/health
HTTP/1.1 200 0.02 secs: 475 bytes ==> GET /sys/health
几分钟后(通常是 5-10 分钟),它会停止并正确转发请求。
集群信息:
- Kubernetes 版本:1.8.8
- 谷歌云平台
- g1-小