Recently in learning a spring cloud, according to the online tutorials, hello - service service has been set up but invoked by service consumers showed No instances available for hello - service

But the service registration has been successful

Why is this? I direct call service IP address can get return values

The service provider's controller classes and entry is as follows:

 @ RestController 
Public class HelloController {
Private final Logger Logger=Logger. GetLogger (getClass ()); 
The @autowired 
Private DiscoveryClient client; 

@ RequestMapping (value="https://bbs.csdn.net/hello", method=RequestMethod. GET) 
Public String index () {
List The instances=client. GetInstances (" hello - service "); 
for (int i=0; I & lt; The instances. The size (); I++) {
Logger. The info ("/hello, host: "+ instances. The get (I). The getHost () +", service_id: "+ instances. The get (I). GetServiceId ()); 
} 
Return "Hello World". 
} 
} 

 @ EnableDiscoveryClient 
@ SpringBootApplication 
Public class ProviderApplication {

Public static void main (String [] args) {
SpringApplication. Run (ProviderApplication. Class, args); 
} 
} 

The service consumer controller classes and entry:

 @ RestController 
Public class ConsumerController {
The @autowired 
RestTemplate RestTemplate; 
@ RequestMapping (value="https://bbs.csdn.net/ribbon-consumer", method=RequestMethod. GET) 
Public String helloController () {
Return restTemplate. GetForEntity (" http://HELLO-SERVICE/hello ", String class). The getBody (); 
} 
} 

 @ SpringBootApplication 
@ EnableDiscoveryClient 
Public class RibbonConsumerApplication {

Public static void main (String [] args) {
SpringApplication. Run (RibbonConsumerApplication. Class, args); 
} 
@ LoadBalanced 
@ Bean 
RestTemplate RestTemplate () {
Return new RestTemplate (); 
} 
} 

CodePudding user response:

The consumer end
Eureka configuration is correct?

CodePudding user response:

Because the value of your @ RequestMapping hello

CodePudding user response:

I also met before, is the same as mine? https://blog.csdn.net/a729913162/article/details/81123078#comments

CodePudding user response:

Eureka. The instance. The hostname configuration is there, any deleted try again

CodePudding user response:

I also met, just to solve in the consumer end write spring. When accessing a service application. The name of the name of external exposure

CodePudding user response:

 
Eureka: 
Client: 
Service - url: 
DefaultZone: http://localhost:7001/eureka 
# defaultZone: http://eureka7001.com:7001/eureka/, http://eureka7002.com:7002/eureka/, http://eureka7003.com:7003/eureka/
Instance: 
The instance - id: jih - manage 
-- - IP address: true 
Server: 
Enable - self - preservation: false 

this is the publisher of eureka configuration, the source code at https://github.com/qpdyg/jih

CodePudding user response:

There is something wrong with the RestTemplate injection
The needs of the new injection:
@ Bean
@ LoadBalanced
RestOperations restTemplate (RestTemplateBuilder builder) {
Return builder. The build ();
}

The @autowired
RestOperations restTemplate;

CodePudding user response:

12th floor is a positive solution, for many days

CodePudding user response:

Excuse me, can you solve it, you and I appeared the same problem, 13 said 12 floor is a positive solution, can you try it, I don't know public RestOperations restTemplate (RestTemplateBuilder builder) {
Return builder. The build ();
}
What is RestTemplateBuilder this parameter

CodePudding user response:

Why not feign brother

CodePudding user response:

The

refer to 12 floor bin brother reply:

RestTemplate injection has a problem
The needs of the new injection:
@ Bean
@ LoadBalanced
RestOperations restTemplate (RestTemplateBuilder builder) {
Return builder. The build ();
}

The @autowired
RestOperations restTemplate;

Bosses, what is your version? I have used this way, you still have a problem, I wonder could it be version of the problem?

CodePudding user response:

https://blog.csdn.net/o_darling/article/details/82147350

CodePudding user response:

reference 16 floor changerzhuo response:

Quote: refer to 12 floor bin brother reply:

There is something wrong with the RestTemplate injection
The needs of the new injection:
@ Bean
@ LoadBalanced
RestOperations restTemplate (RestTemplateBuilder builder) {
Return builder. The build ();
}

The @autowired
RestOperations restTemplate;

Bosses, what is your version? I have used this way, you still have a problem, I wonder could it be version of the problem?

SpringBoot 2.0.4 version. RELEASE
SpringCloud version Finchley. SR1
The injection method can also be abbreviated:

@ Bean
@ LoadBalanced
Public RestTemplate RestTemplate (RestTemplateBuilder builder) {
Return builder. The build ();
}

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