0.9.0.RELEASE版本的spring cloud alibaba nacos实例

2022-05-27 20:30:02

　　简而言之，nacos与eureka的不同之处有三：后台老板、部署方式、功能。nacos是阿里的，eureka是奈飞的；nacos有自己的安装包，需要独立部署，eureka仅作为一个服务组件，引入jar包即可；nacos=eureka+config，它既是注册中心，也是配置中心。

　　如何使用nacos？先下载安装包（下载地址https://github.com/alibaba/nacos/releases），打开下载页 -> 点击目前最新版本1.1.3跳到下载页 -> 点击压缩包 -> 下载到本地（E盘download目录）后解压 -> 通过命令行启动nacos：

C:\Users\wulf>e:

E:\>cd download\nacos\bin

E:\download\nacos\bin>startup.cmd -m standalone

         ,--.

       ,--.'|

   ,--,:  : |                                           Nacos 1.1.

,`--.'`|  ' :                       ,---.               Running in stand alone mode, All function modules

|   :  :  | |                      '   ,'\   .--.--.    Port:

:   |   \ | :  ,--.--.     ,---.  /   /   | /  /    '   Pid: 32916

|   : '  '; | /       \   /     \.   ; ,. :|  :  /`./   Console: http://10.10.100.110:8848/nacos/index.html

'   ' ;.    ;.--.  .-. | /    / ''   | |: :|  :  ;_

|   | | \   | \__\/: . ..    ' / '   | .; : \  \    `.      https://nacos.io

'   : |  ; .' ," .--.; |'   ; :__|   :    |  `----.   \

|   | '`--'  /  /  ,.  |'   | '.'|\   \  /  /  /`--'  /

'   : |     ;  :   .'   \   :    : `----'  '--'.     /

;   |.'     |  ,     .-./\   \  /            `--'---'

'---'        `--`---'     `----'

-- ::, INFO Bean 'org.springframework.security.config.annotation.configuration.ObjectPostProcessorConfiguration' of type [org.springframework.security.config.annotation.configuration.ObjectPostProcessorConfiguration$$EnhancerBySpringCGLIB$$209b3f7a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

-- ::, INFO Bean 'objectPostProcessor' of type [org.springframework.security.config.annotation.configuration.AutowireBeanFactoryObjectPostProcessor] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

-- ::, INFO Bean 'org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler@6e9175d8' of type [org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

-- ::, INFO Bean 'org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration' of type [org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration$$EnhancerBySpringCGLIB$$456fe22c] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

-- ::, INFO Bean 'methodSecurityMetadataSource' of type [org.springframework.security.access.method.DelegatingMethodSecurityMetadataSource] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

-- ::, INFO Tomcat initialized with port(s):  (http)

-- ::, INFO Root WebApplicationContext: initialization completed in  ms

-- ::, INFO Initializing ExecutorService 'applicationTaskExecutor'

-- ::, INFO Adding welcome page: class path resource [static/index.html]

-- ::, INFO Creating filter chain: Ant [pattern='/'], []

-- ::, INFO Creating filter chain: Ant [pattern='/**/*.css'], []

-- ::, INFO Creating filter chain: Ant [pattern='/**/*.js'], []

-- ::, INFO Creating filter chain: Ant [pattern='/**/*.html'], []

-- ::, INFO Creating filter chain: Ant [pattern='/**/*.map'], []

-- ::, INFO Creating filter chain: Ant [pattern='/**/*.svg'], []

-- ::, INFO Creating filter chain: Ant [pattern='/**/*.png'], []

-- ::, INFO Creating filter chain: Ant [pattern='/**/*.ico'], []

-- ::, INFO Creating filter chain: Ant [pattern='/console-fe/public/**'], []

-- ::, INFO Creating filter chain: Ant [pattern='/v1/auth/login'], []

-- ::, INFO Creating filter chain: Ant [pattern='/v1/console/health/**'], []

-- ::, INFO Creating filter chain: Ant [pattern='/v1/cs/**'], []

-- ::, INFO Creating filter chain: Ant [pattern='/v1/ns/**'], []

-- ::, INFO Creating filter chain: Ant [pattern='/v1/cmdb/**'], []

-- ::, INFO Creating filter chain: Ant [pattern='/actuator/**'], []

-- ::, INFO Creating filter chain: Ant [pattern='/v1/console/server/**'], []

-- ::, INFO Creating filter chain: any request, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@6c8bca63, org.springframework.security.web.context.SecurityContextPersistenceFilter@6d24ffa1, org.springframework.security.web.header.HeaderWriterFilter@74cadd41, org.springframework.security.web.authentication.logout.LogoutFilter@42a9e5d1, com.alibaba.nacos.console.filter.JwtAuthenticationTokenFilter@2364305a, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@773f7880, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@4c51bb7, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@470a696f, org.springframework.security.web.session.SessionManagementFilter@55e8ec2f, org.springframework.security.web.access.ExceptionTranslationFilter@62fad19, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@5536379e]

-- ::, INFO Exposing  endpoint(s) beneath base path '/actuator'

-- ::, INFO Initializing ExecutorService 'taskScheduler'

-- ::, INFO Tomcat started on port(s):  (http) with context path '/nacos'

-- ::, INFO Nacos Log files: E:\download\nacos/logs/

-- ::, INFO Nacos Conf files: E:\download\nacos/conf/

-- ::, INFO Nacos Data files: E:\download\nacos/data/

-- ::, INFO Nacos started successfully in stand alone mode.

-- ::, INFO Initializing Servlet 'dispatcherServlet'

-- ::, INFO Completed initialization in  ms

　　我们通过localhost:8848/nacos可以访问到它，默认用户名密码都是nacos：

　　我们创建个项目来注册到这个nacos，三板斧再来：

　　1、pom引入spring boot、spring cloud、spring cloud alibaba和nacos依赖：

<?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.wlf</groupId>

    <artifactId>spring-cloud-alibaba-provider</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>jar</packaging>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.1.7.RELEASE</version>

    </parent>

    <dependencyManagement>

        <dependencies>

            <dependency>

                <groupId>org.springframework.cloud</groupId>

                <artifactId>spring-cloud-dependencies</artifactId>

                <version>Greenwich.SR2</version>

                <type>pom</type>

                <scope>import</scope>

            </dependency>

            <dependency>

                <groupId>org.springframework.cloud</groupId>

                <artifactId>spring-cloud-alibaba-dependencies</artifactId>

                <version>0.9.0.RELEASE</version>

                <type>pom</type>

                <scope>import</scope>

            </dependency>

        </dependencies>

    </dependencyManagement>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>

        </dependency>

        <dependency>

            <groupId>org.projectlombok</groupId>

            <artifactId>lombok</artifactId>

            <optional>true</optional>

        </dependency>

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>

　　2、application配置nacos地址：

#端口

server.port=

#应用名

spring.application.name=lxytrans-provider

#注册中心

spring.cloud.nacos.discovery.server-addr=localhost:

　　3、启动类加注解@EnableDiscoveryClient：

import lombok.extern.slf4j.Slf4j;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

import org.springframework.context.annotation.Bean;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.RestController;

@EnableDiscoveryClient

@SpringBootApplication

public class TransProviderApplication {

    public static void main(String[] args) {

        SpringApplication.run(TransProviderApplication.class, args);

    }

    @Slf4j

    @RestController

    static class TestController {

        @GetMapping("/hello")

        public String hello() {

            return "hello";

        }

        @GetMapping("/hey")

        public String hey() throws InterruptedException {

            Thread.sleep(2000);

            return "hey";

        }

    }

}

　　跑起来后我们看下nacos控制台实例：

　　以上是服务提供方注册到nacos，消费方的注册跟服务方没啥不同，这里就不再列出。nacos更多介绍参见https://nacos.io/zh-cn/docs/what-is-nacos.html。至于消费方如何通过nacos调用提供方服务，参见0.9.0.RELEASE版本的spring cloud alibaba nacos+feign实例。

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