增加 Consul 入门

cattlesheep · Jun 11, 2020 · 1ed2283 · 1ed2283
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diff --git a/labx-27/labx-27-sc-consul-discovery-demo01-consumer/pom.xml b/labx-27/labx-27-sc-consul-discovery-demo01-consumer/pom.xml
@@ -0,0 +1,62 @@
+<?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">
+    <parent>
+        <artifactId>labx-27</artifactId>
+        <groupId>cn.iocoder.springboot.labs</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>labx-27-sc-consul-discovery-demo01-consumer</artifactId>
+
+    <properties>
+        <spring.boot.version>2.2.4.RELEASE</spring.boot.version>
+        <spring.cloud.version>Hoxton.SR1</spring.cloud.version>
+    </properties>
+
+    <!--
+        引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
+        在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
+     -->
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-starter-parent</artifactId>
+                <version>${spring.boot.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-dependencies</artifactId>
+                <version>${spring.cloud.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <!-- 引入 Spring Cloud Consul Discovery 相关依赖，将 Consul 作为注册中心，并实现对其的自动配置 -->
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
+        </dependency>
+
+        <!-- 引入 Spring Boot Actuator 组件，因为需要通过它提供健康检查的接口给 Consul -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/.../main/java/cn/iocoder/springcloud/labx27/consuldemo/consumer/DemoConsumerApplication.java b/.../main/java/cn/iocoder/springcloud/labx27/consuldemo/consumer/DemoConsumerApplication.java
@@ -0,0 +1,69 @@
+package cn.iocoder.springcloud.labx27.consuldemo.consumer;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.ServiceInstance;
+import org.springframework.cloud.client.discovery.DiscoveryClient;
+import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.List;
+
+@SpringBootApplication
+// @EnableDiscoveryClient
+public class DemoConsumerApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DemoConsumerApplication.class, args);
+    }
+
+    @Configuration
+    public class RestTemplateConfiguration {
+
+        @Bean
+        public RestTemplate restTemplate() {
+            return new RestTemplate();
+        }
+
+    }
+
+    @RestController
+    static class TestController {
+
+        @Autowired
+        private DiscoveryClient discoveryClient;
+        @Autowired
+        private RestTemplate restTemplate;
+        @Autowired
+        private LoadBalancerClient loadBalancerClient;
+
+        @GetMapping("/hello")
+        public String hello(String name) {
+            // 获得服务 `demo-provider` 的一个实例
+            ServiceInstance instance;
+            if (true) {
+                // 获取服务 `demo-provider` 对应的实例列表
+                List<ServiceInstance> instances = discoveryClient.getInstances("demo-provider");
+                // 选择第一个
+                instance = instances.size() > 0 ? instances.get(0) : null;
+            } else {
+                instance = loadBalancerClient.choose("demo-provider");
+            }
+            // 发起调用
+            if (instance == null) {
+                throw new IllegalStateException("获取不到实例");
+            }
+            String targetUrl = instance.getUri() + "/echo?name=" + name;
+            String response = restTemplate.getForObject(targetUrl, String.class);
+            // 返回结果
+            return "consumer:" + response;
+        }
+
+    }
+
+}
diff --git a/labx-27/labx-27-sc-consul-discovery-demo01-consumer/src/main/resources/application.yaml b/labx-27/labx-27-sc-consul-discovery-demo01-consumer/src/main/resources/application.yaml
@@ -0,0 +1,12 @@
+spring:
+  application:
+    name: demo-consumer # Spring 应用名
+  cloud:
+    zookeeper:
+      connect-string: 127.0.0.1:2181
+      # Zookeeper 作为注册中心的配置项，对应 ZookeeperDiscoveryProperties 配置类
+      discovery:
+        root: /services # Zookeeper 数据存储的根节点，默认为 /services
+
+server:
+  port: 28080 # 服务器端口。默认为 8080
diff --git a/labx-27/labx-27-sc-consul-discovery-demo01-provider/pom.xml b/labx-27/labx-27-sc-consul-discovery-demo01-provider/pom.xml
@@ -0,0 +1,62 @@
+<?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">
+    <parent>
+        <artifactId>labx-27</artifactId>
+        <groupId>cn.iocoder.springboot.labs</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>labx-27-sc-consul-discovery-demo01-provider</artifactId>
+
+    <properties>
+        <spring.boot.version>2.2.4.RELEASE</spring.boot.version>
+        <spring.cloud.version>Hoxton.SR1</spring.cloud.version>
+    </properties>
+
+    <!--
+        引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
+        在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
+     -->
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-starter-parent</artifactId>
+                <version>${spring.boot.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-dependencies</artifactId>
+                <version>${spring.cloud.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <!-- 引入 Spring Cloud Consul Discovery 相关依赖，将 Consul 作为注册中心，并实现对其的自动配置 -->
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
+        </dependency>
+
+        <!-- 引入 Spring Boot Actuator 组件，因为需要通过它提供健康检查的接口给 Consul -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/.../main/java/cn/iocoder/springcloud/labx27/consuldemo/provider/DemoProviderApplication.java b/.../main/java/cn/iocoder/springcloud/labx27/consuldemo/provider/DemoProviderApplication.java
@@ -0,0 +1,27 @@
+package cn.iocoder.springcloud.labx27.consuldemo.provider;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@SpringBootApplication
+@EnableDiscoveryClient
+public class DemoProviderApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DemoProviderApplication.class, args);
+    }
+
+    @RestController
+    static class TestController {
+
+        @GetMapping("/echo")
+        public String echo(String name) {
+            return "provider:" + name;
+        }
+
+    }
+
+}
diff --git a/labx-27/labx-27-sc-consul-discovery-demo01-provider/src/main/resources/application.yaml b/labx-27/labx-27-sc-consul-discovery-demo01-provider/src/main/resources/application.yaml
@@ -0,0 +1,14 @@
+spring:
+  application:
+    name: demo-provider # Spring 应用名
+  cloud:
+    # Spring Cloud Consul 通用配置项，对应 ConsulProperties 类
+    consul:
+      host: 127.0.0.1 # Consul 主机
+      port: 8500 # Consul 端口
+      # Spring Cloud Consul Discovery 配置项，对应 ConsulDiscoveryProperties 类
+      discovery:
+        service-name: ${spring.application.name} # 注册到 Consul 的服务名，默认为 `spring.application.name` 配置项
+
+server:
+  port: 18080 # 服务器端口。默认为 8080
diff --git a/labx-27/pom.xml b/labx-27/pom.xml
@@ -0,0 +1,19 @@
+<?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">
+    <parent>
+        <artifactId>labs-parent</artifactId>
+        <groupId>cn.iocoder.springboot.labs</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>labx-27</artifactId>
+
+    <modules>
+        <module>labx-27-sc-consul-discovery-demo01-provider</module>
+        <module>labx-27-sc-consul-discovery-demo01-consumer</module>
+    </modules>
+
+</project>
diff --git a/pom.xml b/pom.xml
@@ -103,6 +103,7 @@
 <!--        <module>labx-25</module>-->
 <!--        <module>labx-26</module>-->
 
+        <module>labx-27</module>
     </modules>
 
 </project>