my docker images are able to ping eureka-server using curl in docker terminal but not getting registered

[GIRISHARAN]

I am using spring boot, spring cloud netfix eureka-server, config-server and docker to run microservices.

Everything is fine in non-dockerized environments, but once I dockerized the eureka server and the microservice, for example user-service, I found that the user-service could not registered to eureka server but able to ping using "curl http://netflix-eureka-service-registry:8761".

My config-server is able to get details from my git repo where I am bale to see using /actuator/default

2024-05-21 18:39:25 2024-05-21T21:39:25.139Z INFO 1 --- [cloud-config-server] [freshExecutor-0] c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8761/eureka/}, exception=I/O error on GET request for "http://localhost:8761/eureka/apps/": Connect to http://localhost:8761 [localhost/127.0.0.1] failed: Connection refused stacktrace=org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://localhost:8761/eureka/apps/": Connect to http://localhost:8761 [localhost/127.0.0.1] failed: Connection refused
2024-05-21 18:39:25 at org.springframework.web.client.RestTemplate.createResourceAccessException(RestTemplate.java:915)
2024-05-21 18:39:25 at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:895)
2024-05-21 18:39:25 at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:790)
2024-05-21 18:39:25 at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:672)
2024-05-21 18:39:25 at org.springframework.cloud.netflix.eureka.http.RestTemplateEurekaHttpClient.getApplicationsInternal(RestTemplateEurekaHttpClient.java:145)
2024-05-21 18:39:25 at org.springframework.cloud.netflix.eureka.http.RestTemplateEurekaHttpClient.getApplications(RestTemplateEurekaHttpClient.java:135)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:121)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:80)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)
2024-05-21 18:39:25 at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134)
2024-05-21 18:39:25 at com.netflix.discovery.DiscoveryClient.getAndStoreFullRegistry(DiscoveryClient.java:1045)
2024-05-21 18:39:25 at com.netflix.discovery.DiscoveryClient.fetchRegistry(DiscoveryClient.java:958)
2024-05-21 18:39:25 at com.netflix.discovery.DiscoveryClient.refreshRegistry(DiscoveryClient.java:1475)
2024-05-21 18:39:25 at com.netflix.discovery.DiscoveryClient$CacheRefreshThread.run(DiscoveryClient.java:1442)
2024-05-21 18:39:25 at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
2024-05-21 18:39:25 at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
2024-05-21 18:39:25 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
2024-05-21 18:39:25 at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
2024-05-21 18:39:25 at java.base/java.lang.Thread.run(Thread.java:833)
2024-05-21 18:39:25 Caused by: org.apache.hc.client5.http.HttpHostConnectException: Connect to http://localhost:8761 [localhost/127.0.0.1] failed: Connection refused

Getting this error for all my microservices (api-gateway, user-service, department-service, config-server)

In my git I have this-
eureka.client.register-with-eureka=true
eureka.client.fetch-registry=true
eureka.client.service-url.defaultZone=http://netflix-eureka-service-registry:8761/eureka/
#eureka.instance.hostname=netflix-eureka-service-registry

I tried all posible waus but did not find the issue. I kindly request anyone who can help me. I am learning spring microservices.