![](/img/trans.png)
[英]Spring Boot Microservices cannot run on Kubernetes (java.net.SocketTimeoutException: connect timed out)
[英]Kubernetes Issue in Spring Boot Microservices java.net.SocketTimeoutException: connect timed out
我在 Kube.netes 上运行 Spring Boot 微服务时遇到问题。 安装 minikube 后,我启动它并打开它的仪表板。
这是打开仪表板的命令。
1 ) minikube start
2 ) minikube dashboard
接下来,我通过此命令运行所有服务。
kubectl apply -f k8s
等待一定时间后,我遇到了如下所示的问题。
15:22:37.395 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
org.springframework.cloud.config.client.ConfigClientFailFastException: Could not locate PropertySource and the resource is not optional, failing
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.doLoad(ConfigServerConfigDataLoader.java:197)
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.load(ConfigServerConfigDataLoader.java:102)
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.load(ConfigServerConfigDataLoader.java:61)
at org.springframework.boot.context.config.ConfigDataLoaders.load(ConfigDataLoaders.java:107)
at org.springframework.boot.context.config.ConfigDataImporter.load(ConfigDataImporter.java:128)
at org.springframework.boot.context.config.ConfigDataImporter.resolveAndLoad(ConfigDataImporter.java:86)
at org.springframework.boot.context.config.ConfigDataEnvironmentContributors.withProcessedImports(ConfigDataEnvironmentContributors.java:116)
at org.springframework.boot.context.config.ConfigDataEnvironment.processWithProfiles(ConfigDataEnvironment.java:311)
at org.springframework.boot.context.config.ConfigDataEnvironment.processAndApply(ConfigDataEnvironment.java:232)
at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:102)
at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:94)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEnvironmentPreparedEvent(EnvironmentPostProcessorApplicationListener.java:102)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEvent(EnvironmentPostProcessorApplicationListener.java:87)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85)
at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:344)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:302)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295)
at com.microservice.orderservice.OrderServiceApplication.main(OrderServiceApplication.java:15)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:65)
Caused by: org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://config-server-svc:9296/ORDER-SERVICE/default": connect timed out; nested exception is java.net.SocketTimeoutException: connect timed out
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:785)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:711)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:602)
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.getRemoteEnvironment(ConfigServerConfigDataLoader.java:303)
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.doLoad(ConfigServerConfigDataLoader.java:118)
... 35 common frames omitted
Caused by: java.net.SocketTimeoutException: connect timed out
at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412)
at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255)
at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237)
at java.base/java.net.Socket.connect(Socket.java:609)
at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:177)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:508)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:603)
at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:276)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:375)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:396)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1253)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1187)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1081)
at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1015)
at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:76)
at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:66)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:776)
... 39 common frames omitted
这是我的 deployment.yaml 文件,如下所示。
apiVersion: apps/v1
kind: Deployment
metadata:
name: auth-service-app
spec:
selector:
matchLabels:
app: auth-service-app
template:
metadata:
labels:
app: auth-service-app
spec:
containers:
- name: auth-service-app
image: noyandocker/authservice
imagePullPolicy: IfNotPresent
ports:
- containerPort: 7777
env:
- name: CONFIG_SERVER_URL
valueFrom:
configMapKeyRef:
name: config-cm
key: config_url
- name: EUREKA_SERVER_ADDRESS
valueFrom:
configMapKeyRef:
name: eureka-cm
key: eureka_service_address
- name: DB_HOST
valueFrom:
configMapKeyRef:
name: mysql-cm
key: hostname
---
apiVersion: v1
kind: Service
metadata:
name: auth-service-svc
spec:
selector:
app: auth-service-app
ports:
- port: 80
targetPort: 7777
这是配置 map yaml 文件
apiVersion: v1
kind: ConfigMap
metadata:
name: config-cm
data:
config_url: "config-server-svc"
---
apiVersion: v1
kind: ConfigMap
metadata:
name: eureka-cm
data:
eureka_service_address: "http://eureka-0.eureka:8761/eureka"
---
apiVersion: v1
kind: ConfigMap
metadata:
name: mysql-cm
data:
hostname: "mysql-0.mysql"
这是 config-server-deployment.yaml 文件
apiVersion: apps/v1
kind: Deployment
metadata:
name: config-server-app
spec:
selector:
matchLabels:
app: config-server-app
template:
metadata:
labels:
app: config-server-app
spec:
containers:
- name: config-server-app
image: noyandocker/configserver
imagePullPolicy: IfNotPresent
ports:
- containerPort: 9296
readinessProbe:
httpGet:
path: /actuator/health
port: 9296
initialDelaySeconds: 20
timeoutSeconds: 10
periodSeconds: 3
failureThreshold: 2
livenessProbe:
httpGet:
path: /actuator/health
port: 9296
initialDelaySeconds: 30
timeoutSeconds: 2
periodSeconds: 8
failureThreshold: 1
env:
- name: EUREKA_SERVER_ADDRESS
valueFrom:
configMapKeyRef:
name: eureka-cm
key: eureka_service_address
---
apiVersion: v1
kind: Service
metadata:
name: config-server-svc
spec:
selector:
app: config-server-app
ports:
- port: 80
targetPort: 9296
我以为所有的服务都会同时启动。 Config Server 是所有其他服务(如 auth 服务)的依赖服务,在 Config Server 服务启动并运行之前,此 Auth 服务不应启动。
我怎样才能做到这一点?
这是我的回购:链接
这是我的 docker 中心:链接
这是 git 后端系统:链接
在微服务架构中工作时,您不能依赖服务之间的依赖关系。 如果由于硬件问题导致单个服务关闭怎么办? 所有平台都无法使用?
事实上,每个微服务都必须为不可用的服务做好准备。 您可以使用断路器来做到这一点。 据我所知,Kube.netes 不支持这种依赖。
不过,我发现了一些可以在这里使用的技巧:https://www.alibabacloud.com/blog/kube.netes-demystified-solving-service-dependencies_594110
在您的情况下,使用启动其他服务时不可用的服务配置服务器,您可以为服务添加一些重试机制。 这样,他们将在 5 或 5 次尝试后尝试访问服务配置服务器。 看这里, https://cloud.spring.io/spring-cloud-static/spring-cloud-config/2.1.4.RELEASE/multi/multi__spring_cloud_config_client.html#config-client-retry
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.