openeuler/spring-cloud repository overview

⁠Quick reference

• The official Spring Cloud docker image.

• Maintained by: openEuler CloudNative SIG⁠.

• Where to get help: openEuler CloudNative SIG⁠, openEuler⁠.

⁠Spring Cloud | openEuler

Current Spring Cloud docker images are built on the openEuler⁠. This repository is free to use and exempted from per-user rate limits.

Spring Cloud provides tools for developers to quickly build some of the common patterns in distributed systems (e.g. configuration management, service discovery, circuit breakers, intelligent routing, micro-proxy, control bus, short lived microservices and contract testing). Coordination of distributed systems leads to boiler plate patterns, and using Spring Cloud developers can quickly stand up services and applications that implement those patterns. They will work well in any distributed environment, including the developer’s own laptop, bare metal data centres, and managed platforms such as Cloud Foundry.

Learn more on Spring Cloud Website⁠⁠.

⁠Supported tags and respective Dockerfile links

The tag of each spring-cloud docker image is consist of the version of spring-cloud and the version of basic image. The details are as follows

⁠Usage

In this usage, users can select the corresponding {Tag} based on their requirements.

• Pull the openeuler/spring-cloud image from docker

  docker pull openeuler/spring-cloud:{Tag}
  

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• Spring Cloud Netflix Eureka Client Starter Example

  When you use:

  <dependency>
      <groupId>org.springframework.cloud</groupId>
      <atifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
  </dependency>
  

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  this starter pulls in:

  • spring-cloud-commons
  • spring-cloud-netflix-eureka-client

  The Netflix Eureka Client implements interfaces defined in spring-cloud-commons:

  Abstraction (spring-cloud-commons)	Eureka Implementation (spring-cloud-netflix-eureka-client)
  DiscoveryClient	EurekaDiscoveryClient
  ServiceInstance	EurekaServiceInstance
  ServiceRegistry	EurekaServiceRegistry
  AutoServiceRegistration	EurekaAutoServiceRegistration
  HealthIndicator	EurekaHealthIndicator

• Example code

  @SpringBootApplication
  @EnableDiscoveryClient  // enables DiscoveryClient from spring-cloud-commons
  public class MyApp {
    public static void main(String[] args) {
      SpringApplication.run(MyApp.class, args);
    }
  }
  
  @RestController
  public class HelloController {
  
    @Autowired
    private DiscoveryClient discoveryClient; // spring-cloud-commons
  
    @Autowired
    private RestTemplate restTemplate;
  
    @Bean
    @LoadBalanced // spring-cloud-commons
    public RestTemplate restTemplate() {
      return new RestTemplate();
    }
  
    @GetMapping("/call")
    public String callUserService() {
      // Uses EurekaDiscoveryClient under the hood
      List<ServiceInstance> instances = discoveryClient.getInstances("user-service");
      // Uses load balancer + Eureka for client-side discovery
      return restTemplate.getForObject("http://user-service/hello", String.class);
    }
  }
  

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⁠Question and answering

If you have any questions or want to use some special features, please submit an issue or a pull request on openeuler-docker-images⁠.