Consul 多数据中心下的服务注册发现与配置共享

超、凢脫俗 2023-10-06 10:29 26阅读 0赞

##### 1. Consul简介 #####

Consul是HashiCorp公司推出的开源软件，它提供了一套分布式高可用可横向扩展的解决方案，能为微服务提供服务治理、健康检查、配置共享等能力。  
  Eurake2.x停止更新后，Spirng Cloud官网也推荐使用Consul实现服务注册与发现。并且可以代替Sping Cloud Config实现配置中心。  
  官网：[https://www.consul.io/][https_www.consul.io]

##### 2. 功能特点 #####

*  **服务发现**  
      提供服务注册和服务发现的功能，通过DNS和Http获取服务信息。
 *  **健康检查**  
      通过健康检查可以避免请求被路由到不健康的服务，并且主动断开使其不再具备服务能力。
 *  **键值存储**  
      提供动态配置功能，通过长轮询实现配置变更的即时通知。
 *  **多数据中心**  
      通过简单配置即可实现多数据中心，并且可以获得其他数据中心的服务。
 *  **UI界面**  
      通过界面即可获取服务信息、配置信息等其他信息。

##### 3. CAP原则 #####

CAP原则指的是在分布式系统中Consistency(一致性)、Availability(可用性)、Partition Tolerance(分区容错性)总是不能同时成立。  
  **一致性**：它要求在任一时刻点分布式系统中的所有数据都处于同一状态。  
  **可用性**：在系统集群的一部分节点宕机后，系统依然能够响应用户的请求。  
  **分区容错性**：在网络区间通信出现异常系统能容错处理。  
  一般来说，网络总是存在不稳定性，分区容错也总是存在的，所以默认CAP中的P总是成立的。  
  一致性要求在任一时刻数据状态一致，必然需要加锁，因此不能保证可用性，反之同理。因此一致性和可用性总是互斥的。

##### 4. 常见服务发现与注册方案对比 #####

<table> 
 <thead> 
  <tr> 
   <th>功能</th> 
   <th>Eureka</th> 
   <th>Consul</th> 
   <th>Zookeeper</th> 
   <th>Nacos</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>CAP</td> 
   <td>AP</td> 
   <td>CP</td> 
   <td>CP</td> 
   <td>CP+AP</td> 
  </tr> 
  <tr> 
   <td>一致性算法</td> 
   <td>无</td> 
   <td>Raft</td> 
   <td>Paxos</td> 
   <td>Raft</td> 
  </tr> 
  <tr> 
   <td>访问协议</td> 
   <td>Http</td> 
   <td>Http/DNS</td> 
   <td>TCP</td> 
   <td>Http/DNS</td> 
  </tr> 
  <tr> 
   <td>健康检查</td> 
   <td>可配支持</td> 
   <td>支持</td> 
   <td>支持</td> 
   <td>支持</td> 
  </tr> 
  <tr> 
   <td>多数据中心</td> 
   <td>x</td> 
   <td>支持</td> 
   <td>x</td> 
   <td>支持</td> 
  </tr> 
  <tr> 
   <td>键值存储</td> 
   <td>支持</td> 
   <td>支持</td> 
   <td>支持</td> 
   <td>支持</td> 
  </tr> 
  <tr> 
   <td>雪崩保护</td> 
   <td>支持</td> 
   <td>x</td> 
   <td>x</td> 
   <td>支持</td> 
  </tr> 
  <tr> 
   <td>自动注销实例</td> 
   <td>支持</td> 
   <td>x</td> 
   <td>支持</td> 
   <td>支持</td> 
  </tr> 
  <tr> 
   <td>监听支持</td> 
   <td>支持</td> 
   <td>支持</td> 
   <td>支持</td> 
   <td>支持</td> 
  </tr> 
  <tr> 
   <td>安全性</td> 
   <td>x</td> 
   <td>ACL/Https</td> 
   <td>ACL</td> 
   <td>ACL/Https</td> 
  </tr> 
  <tr> 
   <td>SpringCloud集成</td> 
   <td>支持</td> 
   <td>支持</td> 
   <td>支持</td> 
   <td>支持</td> 
  </tr> 
  <tr> 
   <td>Dubbo集成</td> 
   <td>x</td> 
   <td>x</td> 
   <td>支持</td> 
   <td>支持</td> 
  </tr> 
  <tr> 
   <td>K8S集成</td> 
   <td>x</td> 
   <td>支持</td> 
   <td>x</td> 
   <td>支持</td> 
  </tr> 
 </tbody> 
</table>

Consul采用Raft算法来保证数据的强一致性，虽然优势明显，但是也牺牲了一些特性：  
  (1) 服务注册比Eureka慢。因为Consul要求必须节点数过半才认为注册成功；  
  (2) Leader挂掉后，在重新选举期间，Consul将不可用，为了一致性牺牲可用性。

##### 5. Consul架构 #####

![format_png][]  
  图中有两个数据中心：DATACENTER1、DATACENTER2，每个数据中心都有3个Server节点，该数量使得在故障转移和性能之间达到平衡。

##### 6. Consul端口说明 #####

<table> 
 <thead> 
  <tr> 
   <th>端口</th> 
   <th>说明</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>TCP/8300</td> 
   <td>用于服务器节点。客户端通过该端口 RPC 协议调用服务端节点。</td> 
  </tr> 
  <tr> 
   <td>TCP/UDP/8301</td> 
   <td>用于单个数据中心所有节点之间的互相通信，即对 LAN 池信息的同步。它使得整个数据中心能够自动发现服务器地址，分布式检测节点故障，事件广播（如Leader选举事件）。</td> 
  </tr> 
  <tr> 
   <td>TCP/UDP/8302</td> 
   <td>用于单个或多个数据中心之间的服务器节点的信息同步，即对 WAN 池信息的同步。它针对互联网的网络高延迟进行了优化，能够实现跨数据中心请求。</td> 
  </tr> 
  <tr> 
   <td>8500</td> 
   <td>基于 HTTP 协议，用于 API 接口或 WEB UI 访问。</td> 
  </tr> 
  <tr> 
   <td>8600</td> 
   <td>作为 DNS 服务器，通过节点名查询节点信息。</td> 
  </tr> 
 </tbody> 
</table>

##### 7. Spring Cloud Consul实现服务注册发现 #####

**创建生产者1：**

*  创建Maven项目  
    ![format_png 1][]
 *  修改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>
    	<artifactId>spring-cloud-consul-producer1</artifactId>
    	<name>spring-cloud-consul-producer1</name>
    
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>2.2.1.RELEASE</version>
    	</parent>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    		<java.version>1.8</java.version>
    		<spring-cloud.version>Hoxton.SR5</spring-cloud.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-actuator</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.cloud</groupId>
    			<artifactId>spring-cloud-starter-consul-discovery</artifactId>
    		</dependency>
    		<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>
    	</dependencies>
    
    	<dependencyManagement>
    		<dependencies>
    			<dependency>
    				<groupId>org.springframework.cloud</groupId>
    				<artifactId>spring-cloud-dependencies</artifactId>
    				<version>${spring-cloud.version}</version>
    				<type>pom</type>
    				<scope>import</scope>
    			</dependency>
    		</dependencies>
    	</dependencyManagement>
    
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    
    </project>

*  创建Controller

import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * 业务Controller
     * 
     * @author CL
     *
     */
    @RestController
    public class BookController {
    
    	/**
    	 * 业务接口
    	 * 
    	 * @return
    	 */
    	@RequestMapping(value = "/get")
    	public String get() {
    		return "Consul-1";
    	}
    
    }

*  创建启动类

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    /**
     * 启动类
     * 
     * @author CL
     *
     */
    @SpringBootApplication
    @EnableDiscoveryClient
    public class ConsulProducerApplication {
    
    	public static void main(String[] args) {
    		SpringApplication.run(ConsulProducerApplication.class, args);
    	}
    
    }

*  创建application.yml

server:
      port: 9001
    
    spring:
      application:
        name: spring-cloud-consul-producer
      cloud:
        consul:
          discovery:
            serviceName: consul-producer
          host: 127.0.0.1
          port: 8500

**创建生产者2：**

*  创建Maven项目  
    ![format_png 2][]
 *  修改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>
    	<artifactId>spring-cloud-consul-producer2</artifactId>
    	<name>spring-cloud-consul-producer2</name>
    
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>2.2.1.RELEASE</version>
    	</parent>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    		<java.version>1.8</java.version>
    		<spring-cloud.version>Hoxton.SR5</spring-cloud.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-actuator</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.cloud</groupId>
    			<artifactId>spring-cloud-starter-consul-discovery</artifactId>
    		</dependency>
    		<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>
    	</dependencies>
    
    	<dependencyManagement>
    		<dependencies>
    			<dependency>
    				<groupId>org.springframework.cloud</groupId>
    				<artifactId>spring-cloud-dependencies</artifactId>
    				<version>${spring-cloud.version}</version>
    				<type>pom</type>
    				<scope>import</scope>
    			</dependency>
    		</dependencies>
    	</dependencyManagement>
    
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    </project>

*  创建Controller

*  创建启动类

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.SpringCloudApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    /**
     * 启动类
     * 
     * @author CL
     *
     */
    @SpringBootApplication
    @EnableDiscoveryClient
    public class ConsulProducerApplication {
    
    	public static void main(String[] args) {
    		SpringApplication.run(ConsulProducerApplication.class, args);
    	}
    
    }

*  创建application.yml

server:
      port: 9002
    
    spring:
      application:
        name: spring-cloud-consul-producer
      cloud:
        consul:
          discovery:
            serviceName: consul-producer
          host: 127.0.0.1
          port: 8500

**创建消费者：**

*  创建Maven项目  
    ![format_png 3][]
 *  修改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>
    	<artifactId>spring-cloud-consul-consumer</artifactId>
    	<name>spring-cloud-consul-consumer</name>
    
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>2.2.1.RELEASE</version>
    	</parent>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    		<java.version>1.8</java.version>
    		<spring-cloud.version>Hoxton.SR5</spring-cloud.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-actuator</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.cloud</groupId>
    			<artifactId>spring-cloud-starter-consul-discovery</artifactId>
    		</dependency>
    		<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>
    	</dependencies>
    
    	<dependencyManagement>
    		<dependencies>
    			<dependency>
    				<groupId>org.springframework.cloud</groupId>
    				<artifactId>spring-cloud-dependencies</artifactId>
    				<version>${spring-cloud.version}</version>
    				<type>pom</type>
    				<scope>import</scope>
    			</dependency>
    		</dependencies>
    	</dependencyManagement>
    
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    
    </project>

*  创建Controller

import java.util.List;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.cloud.client.ServiceInstance;
    import org.springframework.cloud.client.discovery.DiscoveryClient;
    import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    /**
     * 服务Controller
     * 
     * @author CL
     *
     */
    @RestController
    public class ServicesController {
    
    	@Autowired
    	private DiscoveryClient discoveryClient;
    
    	@Autowired
    	private LoadBalancerClient loadBalancerClient;
    
    	/**
    	 * 获得所以服务列表
    	 * 
    	 * @return
    	 */
    	@RequestMapping(value = "/getAllServices")
    	public List<ServiceInstance> getAllServices() {
    		return discoveryClient.getInstances("consul-producer");
    	}
    
    	/**
    	 * 获取服务Uri
    	 * 
    	 * @return
    	 */
    	@RequestMapping("/getServiceUri")
    	public String getServiceUri() {
    		return loadBalancerClient.choose("consul-producer").getUri().toString();
    	}
    
    	/**
    	 * 负载均衡调用提供者接口
    	 * 
    	 * @return
    	 */
    	@RequestMapping("/loadBalancer")
    	public String call() {
    		ServiceInstance serviceInstance = loadBalancerClient.choose("consul-producer");
    		return new RestTemplate().getForObject(serviceInstance.getUri().toString() + "/get", String.class);
    	}
    }

*  创建启动类

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /**
     * 启动类
     * 
     * @author CL
     *
     */
    @SpringBootApplication
    public class ConsulConsumerApplication {
    
    	public static void main(String[] args) {
    		SpringApplication.run(ConsulConsumerApplication.class, args);
    	}
    
    }

*  创建application.yml

server:
      port: 9003
    
    spring:
      application:
        name: spring-cloud-consul-consumer
      cloud:
        consul:
          discovery:
            register: false
          host: 127.0.0.1
          port: 8500

**部署Consul：**  
  [Consul安装部署（Windows单机、Docker集群）][Consul_Windows_Docker]  
**启动项目：**  
  启动顺序：生产者1 -> 生产者2 -> 消费者  
  访问Consul WEB UI：[http://127.0.0.1:8500][http_127.0.0.1_8500]  
![format_png 4][]  
![format_png 5][]  
**测试：**

*  获取全部服务信息

curl http://localhost:9003/getAllServices
    
    #返回：
    
    [
        {
            "instanceId": "spring-cloud-consul-producer-9001",
            "serviceId": "consul-producer",
            "host": "192.168.0.100",
            "port": 9001,
            "secure": false,
            "metadata": {
                "secure": "false"
            },
            "uri": "http://192.168.0.100:9001",
            "scheme": null
        },
        {
            "instanceId": "spring-cloud-consul-producer-9002",
            "serviceId": "consul-producer",
            "host": "192.168.0.100",
            "port": 9002,
            "secure": false,
            "metadata": {
                "secure": "false"
            },
            "uri": "http://192.168.0.100:9002",
            "scheme": null
        }
    ]

*  获取服务Uri（负载均衡）

#第一次调用：
    curl http://localhost:9003/getServiceUri
    
    #返回：
    
    http://192.168.0.100:9001
    
    #第二次调用：
    curl http://localhost:9003/getServiceUri
    
    #返回：
    
    http://192.168.0.100:9002

*  调用提供者接口（负载均衡）

#第一次调用：
    curl http://localhost:9003/loadBalancer
    
    #返回：
    
    Consul-1
    
    #第二次调用：
    curl http://localhost:9003/loadBalancer
    
    #返回：
    
    Consul-2

##### 8. Spring Cloud Consul实配置中心 #####

*  创建Maven项目  
    ![format_png 6][]
 *  修改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>
    	<artifactId>spring-cloud-consul-config</artifactId>
    	<name>spring-cloud-consul-config</name>
    
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>2.2.1.RELEASE</version>
    	</parent>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    		<java.version>1.8</java.version>
    		<spring-cloud.version>Hoxton.SR5</spring-cloud.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-actuator</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.cloud</groupId>
    			<artifactId>spring-cloud-starter-consul-discovery</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.cloud</groupId>
    			<artifactId>spring-cloud-starter-consul-config</artifactId>
    		</dependency>
    		<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>
    	</dependencies>
    
    	<dependencyManagement>
    		<dependencies>
    			<dependency>
    				<groupId>org.springframework.cloud</groupId>
    				<artifactId>spring-cloud-dependencies</artifactId>
    				<version>${spring-cloud.version}</version>
    				<type>pom</type>
    				<scope>import</scope>
    			</dependency>
    		</dependencies>
    	</dependencyManagement>
    
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    
    </project>

*  创建application.yml

server:
      port: 9004

*  创建bootstrap.yml  
      作为配置中心的相关配置必须写到bootstrap.yml

spring:
      application:
        name: spring-cloud-consul-config
      cloud:
        consul:
          discovery:
            service-name: consul-config
          host: 127.0.0.1
          port: 8500
          config:
            # 是否启用配置中心功能
            enabled: true
            # 设置配置所在目录
            prefix: config
            # 设置应用程序使用的文件夹名称，默认application
            defaultContext: application
            # 配置key的名字，由于Consul是K/V存储，配置存储在对应K的V中，配置文件路径为：/config/application/key
            data-key: data
            # 设置配置值的格式，四种配置：YAML PROPERTIES KEY-VALUE FILES
            format: YAML
            # 设置配置的分隔符
            profile-separator: ','

*  创建Controller

import org.springframework.beans.factory.annotation.Value;
    import org.springframework.cloud.context.config.annotation.RefreshScope;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * 配置Controller
     * 
     * @author CL
     *
     */
    @RestController
    @RefreshScope
    public class ConfigController {
    
    	@Value("${project-name}")
    	private String projectName;
    
    	@RequestMapping(value = "/getInfo")
    	public String getInfo() {
    		return projectName;
    	}
    
    }

*  创建启动类

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    /**
     * 启动类
     * 
     * @author CL
     *
     */
    @SpringBootApplication
    @EnableDiscoveryClient
    public class ConsulConfigApplication {
    
    	public static void main(String[] args) {
    		SpringApplication.run(ConsulConfigApplication.class, args);
    	}
    
    }

*  创建配置  
      在Consul WEB UI的Key/Value下创建配置：  
    ![format_png 7][]
 *  启动项目
 *  查看Consul WEB UI  
    ![format_png 8][]
 *  测试

curl http://localhost:9004/getInfo
    
    #返回：
    
    spring-cloud-consul-demo

##### 9. 项目地址 #####

[spring-cloud-consul-demo][]

[https_www.consul.io]: https://www.consul.io/
[format_png]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWcyMDIwLmNuYmxvZ3MuY29tL2Jsb2cvMTExOTA5Ny8yMDIwMDYvMTExOTA5Ny0yMDIwMDYwNTEwMDg1OTA0My0xMjE1NzA0NzM0LmpwZw?x-oss-process=image/format,png
[format_png 1]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWcyMDIwLmNuYmxvZ3MuY29tL2Jsb2cvMTExOTA5Ny8yMDIwMDYvMTExOTA5Ny0yMDIwMDYwNTEwMDkxMDQwMi0yMTM1MDE4Mjk4LnBuZw?x-oss-process=image/format,png
[format_png 2]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWcyMDIwLmNuYmxvZ3MuY29tL2Jsb2cvMTExOTA5Ny8yMDIwMDYvMTExOTA5Ny0yMDIwMDYwNTEwMDkyNDY2OS0xOTU5MzcyNjgucG5n?x-oss-process=image/format,png
[format_png 3]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWcyMDIwLmNuYmxvZ3MuY29tL2Jsb2cvMTExOTA5Ny8yMDIwMDYvMTExOTA5Ny0yMDIwMDYwNTEwMDkzODMwMy0yMDIzNDk3MTM4LnBuZw?x-oss-process=image/format,png
[Consul_Windows_Docker]: https://www.cnblogs.com/cao-lei/p/13042750.html
[http_127.0.0.1_8500]: http://127.0.0.1:8500
[format_png 4]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWcyMDIwLmNuYmxvZ3MuY29tL2Jsb2cvMTExOTA5Ny8yMDIwMDYvMTExOTA5Ny0yMDIwMDYwNTEwMTAxNTM0OC04NTI2NjIzNjQucG5n?x-oss-process=image/format,png
[format_png 5]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWcyMDIwLmNuYmxvZ3MuY29tL2Jsb2cvMTExOTA5Ny8yMDIwMDYvMTExOTA5Ny0yMDIwMDYwNTEwMTAyMTUwOS0xNDE2NzAxMDMwLnBuZw?x-oss-process=image/format,png
[format_png 6]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWcyMDIwLmNuYmxvZ3MuY29tL2Jsb2cvMTExOTA5Ny8yMDIwMDYvMTExOTA5Ny0yMDIwMDYwNTEwMTAzNjc2Ny0yNjI2ODQ3NjQucG5n?x-oss-process=image/format,png
[format_png 7]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWcyMDIwLmNuYmxvZ3MuY29tL2Jsb2cvMTExOTA5Ny8yMDIwMDYvMTExOTA5Ny0yMDIwMDYwNTEwMTA1MzQ0Ni05MjUzODY4MjAucG5n?x-oss-process=image/format,png
[format_png 8]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWcyMDIwLmNuYmxvZ3MuY29tL2Jsb2cvMTExOTA5Ny8yMDIwMDYvMTExOTA5Ny0yMDIwMDYwNTEwMTEwNjg0OS0xMTcwNTY4OTI5LnBuZw?x-oss-process=image/format,png
[spring-cloud-consul-demo]: https://github.com/C3Stones/blog