Other service registration and discovery

One 、Zookeeper Service registration and discovery

1.1 Zookeeper install

Go directly to the official website to download ：
Zookeeper-3.7.0

Then decompress ：

// decompression 
tar -zxvf zookeeper-3.7.0-bin.tar.gz 
// Move to app directory 
sudo mv apache-zookeeper-3.7.0-bin /usr/local/ 
//  Change the default profile name 
cd /usr/local/apache-zookeeper-3.7.0-bin/conf
mv zoo_sample.cfg zoo.cfg 

start-up Zookeeper Server：

cd /usr/local/apache-zookeeper-3.7.0-bin/bin
./zkServer.sh start

Connect to the client ：

./zkCli.sh

stop it Server：

./zkServer stop

1.2 Registry Center Zookeeper

Zookeeper It's a distributed coordination tool , It can realize the function of registration center . After installation Zookeeper after , perform ./zkServer start, Start registry .

1.3 Build service provider cloud-provider-payment8004

1.3.1 newly build cloud-provider-payment8004 Sub module

1.3.2 modify 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.atguigu.springcloud</groupId>
        <artifactId>cloud2020</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>cloud-provider-payment8004</artifactId>
    <dependencies>
        <!-- SpringBoot  Integrate  Web  Components  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <!--  Introduce your own definition of  api  General package , have access to  Payment  payment  Entity -->
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>  <!-- SpringBoot  Integrate  zookeeper  client  -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

1.3.3 To configure application.yml

# 8004  Sign up to  Zookeeper  The port number of the server's payment service provider 
server:
  port: 8004

#  Service alias ——Zookeeper The name of the registry 
spring:
  application:
    name: cloud-provider-payment
  cloud:
    zookeeper:
      connect-string: localhost:2181

1.3.4 Start the main class configuration

@SpringBootApplication
@EnableDiscoveryClient
public class
PaymentMain8004 {
    

    public static void main(String[] args) {
    
        SpringApplication.run(PaymentMain8004.class, args);
    }

}

@EnableDiscoveryClient： Use Consul perhaps Zookeeper As a registry , You can use this annotation to register services with the registry

1.3.5 controller

@RestController
public class PaymentController {
    

    @Value("${server.port}")
    private String serverPort;

    @RequestMapping("/payment/zk")
    public String payment(){
    
        return "springcloud with zookeeper: " + serverPort + "\t" + UUID.randomUUID().toString();
    }
}

1.3.6 test

If installed Zookeeper Version is too low , The following errors may occur during startup ：

This is because Zookeeper Of jar Package version conflict , as follows ：

Solution ：
modify pom.xml file , Will bring your own zookeeper3.5.3 exclude , Reintroduce your own installation Zookeeper Version of jar

 <!-- SpringBoot  Integrate  zookeeper  client  -->
<dependency> 
     <groupId>org.springframework.cloud</groupId> 
     <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId> 
     <!--  Exclude the self-contained  zookeeper3.5.3-->
     <exclusions> 
         <exclusion> 
             <groupId>org.apache.zookeeper</groupId> 
             <artifactId>zookeeper</artifactId> 
         </exclusion> 
     </exclusions> 
 </dependency> 
 <!--  add to  zookeeper3.4.9  edition  -->
 <dependency> 
     <groupId> org.apache.zookeeper </groupId> 
     <artifactId>zookeeper</artifactId> 
     <version>3.4.9</version> 
 </dependency> 

I installed it myself Zookeeper Version is 3.7.0, I didn't encounter this problem , It is recommended to use a higher version .

After starting , Access in a browser http://localhost:8004/payment/zk

Sign in Zookeeper client , Execute the following command ：

You can finally get a string of Json character string ：

{
    
  "name": "cloud-provider-payment",
  "id": "bba4b3ac-4175-4b49-b47c-c1c8e989be3c",
  "address": "IP Address ",
  "port": 8004,
  "sslPort": null,
  "payload": {
    
    "@class": "org.springframework.cloud.zookeeper.discovery.ZookeeperInstance",
    "id": "application-1",
    "name": "cloud-provider-payment",
    "metadata": {
    
      
    }
  },
  "registrationTimeUTC": 1656235221350,
  "serviceType": "DYNAMIC",
  "uriSpec": {
    
    "parts": [
      {
    
        "value": "scheme",
        "variable": true
      },
      {
    
        "value": "://",
        "variable": false
      },
      {
    
        "value": "address",
        "variable": true
      },
      {
    
        "value": ":",
        "variable": false
      },
      {
    
        "value": "port",
        "variable": true
      }
    ]
  }
}

reflection ： Zookeeper Is the node in a temporary node or a persistent node ？
Temporary node . take 8004 After the service is shut down , You can see Zookeeper The created node will be deleted .

1.4 Serving consumers cloud-consumerzk-order80

1.4.1 establish cloud-consumerzk-order80 Sub module

1.4.2 modify 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>

  <parent>
    <groupId>com.atguigu.springcloud</groupId>
    <artifactId>cloud2020</artifactId>
    <version>1.0-SNAPSHOT</version>
  </parent>

  <artifactId>cloud-consumerzk-order80</artifactId>
  <dependencies>
    <!-- SpringBoot  Integrate  Web  Components  -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <!--  Introduce your own definition of  api  General package , have access to  Payment  payment  Entity -->
      <groupId>com.atguigu.springcloud</groupId>
      <artifactId>cloud-api-commons</artifactId>
      <version>${project.version}</version>
    </dependency>  <!-- SpringBoot  Integrate  zookeeper  client  -->
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <scope>runtime</scope>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

1.4.3 To configure application.yml

server:
  port: 80

spring:
  application:
    name: cloud-consumer-order
  cloud:
    #  Sign up to  Zookeeper  The address of 
    zookeeper:
      connect-string: localhost:2181

1.4.4 Start the main class configuration

@SpringBootApplication
@EnableDiscoveryClient
public class OrderZKMain80 {
    
    public static void main(String[] args) {
    
        SpringApplication.run(OrderZKMain80.class, args);
    }
}

1.4.5 establish ApplicationContextConfig, To configure RestTemplate

@Configuration
public class ApplicationContextConfig {
    

    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
    
        return new RestTemplate();
    }
}

1.4.6 controller

@RestController
@Slf4j
public class OrderZKController {
    
    public static final String INVOKE_URL = "http://cloud-provider-payment";

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/consumer/payment/zk")
    public String paymentInfo(){
    
        return restTemplate.getForObject(INVOKE_URL + "/payment/zk", String.class);
    }
}

1.4.7 test

Start... First 8004 Service providers , Restart 80 Serving consumers , Then enter Zookeeper client , View node creation ：

Browser access http://localhost/consumer/payment/zk, give the result as follows ：