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Nacos configuration center tutorial

2022-07-01 02:28:00 【kjshuan】

nacos Configuration center project

yml Configuration switching url Address

# First step ： Create a configuration 4 individual yml

 first application.yml
spring:
  application:
    name: myconf01
  profiles:
    active: test
server:
  port: 9001
 
 the second application-dev.yml
  url:
    http://localhost:9999/dev
 Third application-prov.yml
  url:
    http://localhost:9997/prov
 The fourth one application-test.yml 
  url:
    http://localhost:9998/test
  
## among   profiles:
    active: test
activc Specify which one to use below url Address

The second step is configuration service

@Service
public class MyService {
    @Value("${url}")
    private String url;

    public void displayUrl(){
        System.out.println(url);
    }
}

Step 3 test class test

@SpringBootTest
class NcaosspringbootApplicationTests {
    @Resource
    private MyService myService;
    @Test
    void contextLoads() {
        myService.displayUrl();
    }
}

Click on the run ！！！

Nacos Configuration center use

# First step ： To configure pom Import dependence

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

# The second step ： To configure yml

# establish application.yml 
# Be careful name: nacosconf  Want to be with nacos The names configured in the browser are consistent 
spring:
  application:
    name: nacosconf
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.64.200:8848
        username: nacos
        password: nacos
        namespace: public
  profiles:
    active: dev
server:
  port: 12003



# establish bootstrap.yml
spring:
  cloud:
    nacos:
      config:
        server-addr: 192.168.64.200:8848
        username: nacos
        password: nacos
        namespace: public

# The third step ： Configure service class

package com.kgc.mynacos.myconfig.services;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.stereotype.Service;

@Service
// Sync refresh   modify nacos In the configuration of the   It can be automatically updated here 
@RefreshScope
public class ReadConfService {
    @Value("${user.name}")
    private String name;
    @Value("${user.age}")
    private String age;

    public String getInfo(){
        return name+"======="+age;
    }
}

# Step four ： Writing test classes

package com.kgc.mynacos.myconfig;

import com.kgc.mynacos.myconfig.services.ReadConfService;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

import javax.annotation.Resource;

@SpringBootTest
public class MyTest {
    @Resource
    private ReadConfService rcs;

    @Test
    public void test01(){
        while(true){
            System.out.println(rcs.getInfo());

            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }

    }
}

# Be careful ：Test Guide package has 2 individual   choose api This 
#@springBootTest Don't misspell the following words 
# Test class use   Do not use private！！！！！ Otherwise an error no tests were found

Be careful

#bootstrap.yml To configure 
spring:
  cloud:
    nacos:
      config:
        server-addr: 192.168.64.200:8848
        username: nacos
        password: nacos
        namespace: public
        file-extension: yaml
        # Customize  file-extension: yaml
        # Cooperate with browser nacos Modified yaml
        group: yf01
        # Group name in browser   group: yf01

nacos Configure open permissions

vim /opt/soft/nacos8848/conf/application.properties

jps

shutdown.sh

kill -9 (jps The numbers come out )

startup.sh

Custom extension

The first step is to configure yml

#application.yml
spring:
  application:
    name: nacosconf
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.64.200:8848
        username: test
        password: test
        namespace: 66f8bc4c-bb18-41c7-8b6f-e5a84dde11b9
server:
  port: 12003


#bootstrap.yml
spring:
  cloud:
    nacos:
      config:
        server-addr: 192.168.64.200:8848
        username: test
        password: test
        namespace: 66f8bc4c-bb18-41c7-8b6f-e5a84dde11b9
        shared-configs:
          - data-id: myconf.properties
            group: yf01
            refresh: true
          - data-id: myconf1.peoperties
            group: yf01
            refresh: true
          - data-id: myconf3.properties
            group: yf01
            refresh: true
  #extensionConfigs  and sharedConfigs  Function the same 
  # Extended by custom  Data Id  To configure , It can solve the problem of configuration sharing among multiple applications , It can also support multiple configuration files for one application .

The second step nacos Create the role Add permissions