Spring cloud Alibaba series (1) Detailed use of nacos configuration center

table of Contents

table of Contents

Introduction

1. Nacos server construction

1.2 Use nacos server in Linux environment

1.3 Build nacos server under windows

2. Construction of nacos client

2.1 Add dependency

2.2 Add comment: @EnableDiscoveryClient

2.3 Configuration file: application.yml

3. Nacos domain model division and detailed concept

4. Steps to access the configuration center for microservices

4.1 Add dependency package spring-cloud-alibaba-nacos-config

4.2 To write a configuration file, you need to write a bootstrap.yml configuration file

5 Nacos cluster construction

5.1 Download the compressed package after compilation

5.2 Configure the cluster configuration file

5.3 Determine the data source

5.4 Start nacos

5. 5 Visit

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Serial number	name	link address
1	Spring cloud Alibaba series (1) Detailed use of nacos configuration center	https://blog.csdn.net/qq_38130094/article/details/104722653

Introduction

Spring cloud Alibaba is a sub-project of spring cloud. I have heard of a complete set of enterprise-level solutions for microservice development; including the necessary components for microservice development is Ali's microservice solution

About nacos: Nacos is committed to helping you discover, configure, and manage microservices. Nacos provides a set of simple and easy-to-use feature sets to help you quickly realize dynamic service discovery, service configuration, service metadata and traffic management.

1. Nacos server construction

Nacos download address: https://github.com/alibaba/Nacos/releases

1.2 Use nacos server in Linux environment

1: After entering the installation directory, upload the Nacos package and decompress it: tar -zxvf nacos-server-1.2.0.tar.gz

2: Enter the decompressed directory: cd nacos

3: Go to the bin directory to start nacos on a single machine: sh startup.sh -m standalone

4: View process or port status: ps -ef|grep java netstat -tunlp|grep 8848

5: Stop nocas Execute sh shutdown.sh in the nocas/bin directory

5: Visit the server of nocas http://IP:8848/nacos/index.html The   default username and password is nocas/nocas; my one is now directly entered without a password

1.3 Build nacos server under windows

1: After decompressing the nacos directory, enter the bin directory:

2. Construction of nacos client

2.1 Add dependency

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring‐cloud‐alibaba‐nacos‐discovery</artifactId>
</dependency>

2.2 Add comment: @EnableDiscoveryClient

@SpringBootApplication
@EnableDiscoveryClient
@MapperScan("com.ssy")
public class App {

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

}

2.3 Configuration file: application.yml

server:
  port: 8081
  
spring:
  datasource:
      druid:
        username: root
        password: 123456
        jdbcUrl: jdbc:mysql://localhost:3306/alibaba?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
        driverClassName: com.mysql.jdbc.Driver
        initialSize: 5
        minIdle: 5
        maxActive: 20
        maxWait: 60000
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: SELECT 1 FROM DUAL
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        filters: stat,wall #\u914D\u7F6E\u8FC7\u6EE4\u5668
        maxPoolPreparedStatementPerConnectionSize: 20
        useGlobalDataSourceStat: true
        connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
  application:
    name: product-center
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848  #nacos配置地址
        #metadata:
          #version: v1
        #namespace: 
        #group: pay
        #cluster-name: 
        #namespace:

effect:

3. Nacos domain model division and detailed concept

To be studied

4. Steps to access the configuration center for microservices

4.1 Add dependency package spring-cloud-alibaba-nacos-config

<dependency>
	<groupId>com.alibaba.cloud</groupId>
	<artifactId>spring‐cloud‐alibaba‐nacos‐config</artifactId>
</dependency>

4.2 To write a configuration file, you need to write a bootstrap.yml configuration file

spring:
  cloud:
    nacos:
      config:
        server-addr: localhost:8848
        file-extension: yml
        shared-dataids: common.yml,common2.yml
        refreshable-dataids: common.yml,common2.yml
        ext-config:
          - data-id: common3.yml
            group: DEFAULT_GROUP
            refresh: true
          - data-id: common4.yml
            group: DEFAULT_GROUP
            refresh: true
  application:
    name: product-center
  profiles:
    active: dev

1. server-addr: localhost:8848 indicates how my microservice can find my configuration center
2. spring.application.name=order-center means that the current microservice needs to ask the configuration center for order-center configuration
3. spring.profiles.active=prod means that I need to ask the configuration center for the configuration of the order-center production environment
4. The format of the requested file is ${application.name}- ${spring.profiles.active}.${file-extension}
5. With the above files, the configuration file obtained from the nacos configuration center is product-center-prod.yml

5 Nacos cluster construction

5.1 Download the compressed package after compilation

wget https://github.com/alibaba/nacos/releases/download/1.3.0/nacos-server-1.3.0.tar.gz

5.2 Configure the cluster configuration file

In the conf directory of the decompression directory nacos/ of nacos, there is a configuration file cluster.conf, please configure each line as ip:port. (Please configure 3 or more nodes)

# ip:port
172.17.24.185:8848
172.17.24.186:8848
172.17.24.187:8848

5.3 Determine the data source

 mysql data source
try to use highly available mysql data source
nacos-mysql.sql in the installation package to initialize the database
### The built-in data source does
not require any configuration **but the startup command needs to be modified**

sh startup.sh -p embedded

5.4 Start nacos

#单机：
sh startup.sh -m standalone

使用内置数据源:
sh startup.sh -p embedded

#使用外置数据源
sh startup.sh

5. 5 Visit

url: ip:port/nacos
username password: nacos/nacos