Brief description of memory points
1 nacos需要下载安装,手动启动
2 nacos通过配置文件中spring-name实现服务的注册
3 以下代码发现服务集群,通过服务实例ServiceInstance获取服务ip和端口
List<ServiceInstance> instances = discoveryClient.getInstances("微服务名称");
4 这个步骤引入了一个自定义的负载均衡
Service management nacos installation and use
Install nacos
- Download and unzip the installation package in zip format
下载地址:https://github.com/alibaba/nacos/releases
- Start nacos in default standalone mode: startup.cmd -m standalone
- Visit nacos: http://localhost:8848/nacos
Use nacos service registration function
<!--nacos服务注册发现-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
spring:
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
- 3 Add annotation to the main class @EnableDiscoveryClient
- Verification: Check whether the registration is successful in the service list of the nacos console
- Introduce the DiscoveryClient object in class 4 to achieve remote service information in the method
// 根据微服务名称获取集群信息
List<ServiceInstance> instances = discoveryClient.getInstances("service-product");
// 随机数实现负载均衡,随机访问集群中某一个服务
int random = new Random().nextInt(instances.size());
ServiceInstance serviceInstance = instances.get(random);
String host = serviceInstance.getHost();
int port = serviceInstance.getPort();
// 拼接远程调用的服务地址
String url = "http://" + host + ":" + port + "/product/" + pid;
// 通过restTemplate远程调用对应服务
Product product = restTemplate.getForObject(url, Product.class);
= restTemplate.getForObject(url, Product.class);