Nacos 配置
快速开始
- 启动 standalone代表单机模式运行，非集群
sh startup.sh -m standalone
- 服务注册
curl -X POST 'http://127.0.0.1:8848/nacos/v1/ns/instance?serviceName=nacos.naming.serviceName&ip=20.18.7.10&port=8080'
- 服务发现
curl -X GET 'http://127.0.0.1:8848/nacos/v1/ns/instance/list?serviceName=nacos.naming.serviceName'
- 发布配置
curl -X POST "http://127.0.0.1:8848/nacos/v1/cs/configs?dataId=nacos.cfg.dataId&group=test&content=HelloWorld"
- 获取配置
curl -X GET "http://127.0.0.1:8848/nacos/v1/cs/configs?dataId=nacos.cfg.dataId&group=test"
- 关闭服务
sh shutdown.sh
- nacos 管理页面
账号密码默认 nacos
http://localhost:8848/nacos/#/login
springboot nacos
本文介绍
- 父pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.tz</groupId> <artifactId>basenote</artifactId> <version>1.0-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Finchley.SR1</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId> <version>0.2.2.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> </project>
笔记说明
- 版本说明
alibabba cloud 版本说明 - dataId
prefix默认为spring.application.name的值，也可以通过配置项spring.cloud.nacos.config.prefix来配置。spring.profiles.active即为当前环境对应的 profile，详情可以参考 Spring Boot文档。 注意：当spring.profiles.active为空时，对应的连接符-也将不存在，dataId 的拼接格式变成${prefix}.${file-extension}file-exetension为配置内容的数据格式，可以通过配置项spring.cloud.nacos.config.file-extension来配置。目前只支持properties和yaml类型。
- Config server 需要把application.properties 改为bootstrap.properties
Alibaba-Config-Server
- pom.xml
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId> </dependency>
- 更新配置文件名Config server 需要把application.properties 改为bootstrap.properties，内容如下
server.port=9000 spring.cloud.nacos.config.server-addr=127.0.0.1:8848 spring.cloud.nacos.config.group=app1 # dataId ${prefix}-${spring.profiles.active}.${file-extension} spring.application.name=alibaba-nacos-config
- 创建测试动态更新配置的类
@RestController @RefreshScope @RequestMapping("/config") public class ConfigController { @Value("${useLocalCache:false}") private boolean useLocalCache; @GetMapping("/get") public boolean get(){ return useLocalCache; } }
- 到这配置服务就完成，下面我们使用发布配置的方法查看一下配置是否可以动态更新
- 发布新配置，注意发布配置的所属组，默认DEFAULT_GROUP,我们上面指定了group 为app1，所以此时发布配置也要往app1里面发
此时的dataId可以参考上面dataId部分的介绍，所以我们此处就要使用我们设置的spring.application.name加上.properties
curl -X POST "http://127.0.0.1:8848/nacos/v1/cs/configs?dataId=alibaba-nacos-config.properties&group=app1&content=useLocalCache=true"
- 获取配置
// 执行完上面发布配置后此时获取返回true http://127.0.0.1:9000/config/get // 再次执行，唯一的不同就是最后useLocalCache的值 curl -X POST "http://127.0.0.1:8848/nacos/v1/cs/configs?dataId=alibaba-nacos-config.properties&group=app1&content=useLocalCache=false" // 再次获取返回false
Alibaba-Provider-Server
- pom.xml
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> </dependency>
- 启动类添加服务发现注解
@EnableDiscoveryClient @SpringBootApplication public class ServerProviderApplication { public static void main(String[] args) { SpringApplication.run(ServerProviderApplication.class, args); } @Slf4j @RestController static class TestController { @GetMapping("/hello/{str}") public String hello(@PathVariable String str) { log.info("invoked name = " + str); return "hello " + str; } } }
- application.properties
server.port=8001 spring.application.name=alibaba-nacos-discovery-server spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
Alibaba-Consumer-Server
- pom.xml
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> </dependency>
- 启动类添加
@EnableDiscoveryClient @SpringBootApplication public class ServerConsumerApplication { public static void main(String[] args) { SpringApplication.run(ServerConsumerApplication.class, args); } @Slf4j @RestController static class TestController { @Autowired LoadBalancerClient loadBalancerClient; @GetMapping("/test/{str}") public String test(@PathVariable String str) { // 通过spring cloud common中的负载均衡接口选取服务提供节点实现接口调用 ServiceInstance serviceInstance = loadBalancerClient.choose("alibaba-nacos-discovery-server"); String url = serviceInstance.getUri() + "/hello/" + str; RestTemplate restTemplate = new RestTemplate(); String result = restTemplate.getForObject(url, String.class); return "Invoke : " + url + ", return : " + result; } } @RestController public class HelloController { private final RestTemplate restTemplate; @Autowired public HelloController(RestTemplate restTemplate) {this.restTemplate = restTemplate;} @RequestMapping(value = "/echo/{str}", method = RequestMethod.GET) public String echo(@PathVariable String str) { return restTemplate.getForObject("http://alibaba-nacos-discovery-server/hello/" + str, String.class); } } }
- application.properties
server.port=9001 spring.application.name=alibaba-nacos-discovery-client-common spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
- ServerConfig
@Configuration public class ServerConfig { @LoadBalanced @Bean public RestTemplate restTemplate() { return new RestTemplate(); } }
效果演示
- 访问 http://127.0.0.1:8001/hello/test 返回 hello test
- 访问 http://127.0.0.1:9001/test/tz 返回本地的ip
Invoke : http://192.168.31.38:8001/hello/tz, return : hello tz
- 访问 http://127.0.0.1:9001/echo/tz 返回 hello tz
