SpringBoot集成Nacos2.0.3

本篇记录了关于Nacos-server2.0.3的搭建过程（VMware和CentOS7），以及SpringBoot整合Nacos，已搭建的可以跳过第一节看第三节的整合过程。

记录和分享也是一种学习的方式，希望大家多多探讨相关技术问题。

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官方搭建文档

cd /opt

wget https://github.com/alibaba/nacos/releases/download/2.0.3/nacos-server-2.0.3.tar.gz

tar -xvf nacos-server-2.0.3.tar.gz

cd nacos/bin

# Linux/Unix/Mac
# 启动命令(standalone代表着单机模式运行，非集群模式):

sh startup.sh -m standalone

# 如果您使用的是ubuntu系统，或者运行脚本报错提示[[符号找不到，可尝试如下运行：

bash startup.sh -m standalone

# Windows
# 启动命令(standalone代表着单机模式运行，非集群模式):

startup.cmd -m standalone

[root@localhost bin]# sh startup.sh  -m standalone
/usr/java/jdk1.8/bin/java -Djava.ext.dirs=/usr/java/jdk1.8/jre/lib/ext:/usr/java/jdk1.8/lib/ext  -Xms512m -Xmx512m -Xmn256m -Dnacos.standalone=true -Dnacos.member.list= -Xloggc:/opt/nacos2.0.3/nacos/logs/nacos_gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M -Dloader.path=/opt/nacos2.0.3/nacos/plugins/health,/opt/nacos2.0.3/nacos/plugins/cmdb -Dnacos.home=/opt/nacos2.0.3/nacos -jar /opt/nacos2.0.3/nacos/target/nacos-server.jar  --spring.config.additional-location=file:/opt/nacos2.0.3/nacos/conf/ --logging.config=/opt/nacos2.0.3/nacos/conf/nacos-logback.xml --server.max-http-header-size=524288
nacos is starting with standalone
nacos is starting，you can check the /opt/nacos2.0.3/nacos/logs/start.out

# Linux/Unix/Mac
sh shutdown.sh

# Windows
shutdown.cmd

# 或者双击shutdown.cmd运行文件
# 或者kill -15 进程id

[root@localhost bin]# curl -v  http://127.0.0.1:8848/nacos
* about to connect() to 127.0.0.1 port 8848 (#0)
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port 8848 (#0)
> GET /nacos HTTP/1.1
> User-Agent: curl/7.29.0
> Host: 127.0.0.1:8848
> Accept: *
    @GetMapping("/info/{id}")
    public Object getStudentInfo(@PathVariable("id")Integer id){
        Map info = new HashMap<>();
        info.put("id",id);
        info.put("info",queryStudentInfo(id));

        return info;
    }

    private JSONObject queryStudentInfo(Integer id) {
        try {
            if (namingService != null) {
                // 选择user_service服务的一个健康的实例（可配置负载均衡策略）
                Instance instance = namingService.selectOneHealthyInstance("nacos-producer-service");
                // 拼接请求接口url并请求选取的实例
                String url = "http://" + instance.getIp() + ":" + instance.getPort() + "/demo/student/detail/"+id;
                ResponseEntity entity = restTemplate.getForEntity(url, JSONObject.class);
                return entity.getBody();
            }
        } catch (Exception e) {
            log.error("查询学生数据失败", e);
        }
        return null;
    }

}

在nacos-config-discovery-producer中创建一个Controller，作为服务生产者

@Slf4j
@RestController
@RequestMapping("/student")
public class StudentController {

    
    @GetMapping("/detail/{id}")
    public Object getStudentInfo(@PathVariable("id")Integer id){
        Map info = new HashMap<>();
        info.put("id",id);
        info.put("userName","test");
        info.put("nickName","小明");
        return info;
    }


}

调用接口

[root@localhost bin]# curl -X GET http://192.168.1.212:8082/demo/student/info/1
{"id":1,"info":{"nickName":"小明","id":1,"userName":"test"}}