SpringCloud initializes parent-child projects and integrates Consul service discovery

The preparatory work

  • IDEA2020.1
  • JDK1.8
  • Spring Cloud version: Hoxton.sr5
  • Spring Boot version: 2.3.0.release

Install the Consul

  • Windows installation: www.yuque.com/ekko/app/go…
  • Mac installation: www.yuque.com/ekko/app/nz…

start

Profile: Consul’s features

  • Service discovery
  • The Key/Value store
  • Health check

Today we are going to practice service discovery by starting with start.spring. IO/initializing a parent project

</build> 

<repositories>
        <! -- Ali Cloud repository, which represents Maven Central and JCenter repository -->
        <repository>
            <id>aliyun</id>
            <name>aliyun</name>
            <url>https://maven.aliyun.com/repository/public</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <! -- Ali Cloud agent Spring official warehouse -->
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://maven.aliyun.com/repository/spring</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
Copy the code

Save, then open with IDEA, and wait for Maven to finish loading

New subproject

Right-click the project name, New -> Module

Finish

Associated parent project

Add it above the

tag in the parent Module’s POM.xml

	<modules>
		<module>pro-service</module>
	</modules>
Copy the code

Such as graphic

pro-service
The < modelVersion > 4.0.0 < / modelVersion > 

    <parent>
        <groupId>com.github.springtools</groupId>
        <artifactId>SpringCloudPro</artifactId>
        <version>0.0.1</version>
    </parent>
Copy the code

Maven can’t find some Spring Boot dependencies to add the definition of the version number of the management dependencies in the parent project

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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.github.springtools</groupId>
    <artifactId>SpringCloudPro</artifactId>
    <version>0.0.1</version>
    <name>SpringCloudPro</name>
    <description>The parent project</description>
    <packaging>pom</packaging>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR5</spring-cloud.version>
        <spring-boot.version>2.3.0. RELEASE</spring-boot.version>
    </properties>

    <modules>
        <module>pro-service</module>
    </modules>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
        <! - monitoring - >
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <! -- Support Spring Boot 2.3.X-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.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>

    <repositories>
        <! -- Ali Cloud repository, which represents Maven Central and JCenter repository -->
        <repository>
            <id>aliyun</id>
            <name>aliyun</name>
            <url>https://maven.aliyun.com/repository/public</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <! -- Ali Cloud agent Spring official warehouse -->
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://maven.aliyun.com/repository/spring</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>
Copy the code

Subprojects 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.github.springtools</groupId>
        <artifactId>SpringCloudPro</artifactId>
        <version>0.0.1</version>
    </parent>

    <artifactId>pro-service</artifactId>
    <version>0.0.1</version>
    <name>pro-service</name>
    <description>Business module</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>
Copy the code

Project structure drawing

Integration service finds Consul

The parent project adds the following dependencies, which were added in the final parent project pom.xml above, as outlined here

pro-service
resources
application.properties
bootstrap.yml

Since the config will be used later, bootstrap has a higher loading priority than application.properties

Complete subprogram and register with Consul

bootstrap.yml

spring:
  application:
    name: pro-service
  cloud:
    consul:
      discovery:
        health-check-path: /actuator/health  Check instance health
        health-check-interval: 10s   Check every 10 seconds
        hostname: localhost    Configure the instance address
        register: true  # Automatic registration
        service-name: ${spring.application.name} # instance name
      host: localhost
      port: 8500
Copy the code

Ps: the spring here. The application. The name and spring. Cloud. Consul. Discovery. The service – name must add, or it will throw an exception

Caused by: java.lang.IllegalArgumentException: Consul service ids must not be empty, must start with a letter, end with a letter or digit, And have the as interior characters only letters, who - reference: https://www.jianshu.com/p/83d3a8105620Copy the code

Define start class ProServiceApplication. Java

package com.github.springtools.proservice;

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;

@RestController
@EnableDiscoveryClient
@SpringBootApplication
public class ProServiceApplication {

    @GetMapping("/")
    public String hello(a) {
        return "Hello world";
    }

    public static void main(String[] args) { SpringApplication.run(ProServiceApplication.class, args); }}Copy the code

Start the

http://localhost:8500

Source code address

Github.com/Gleans/Spri…

It’s one o ‘clock in the morning, my hair is gone, every day goes by so fast, fuck