This is the 18th day of my participation in Gwen Challenge

Accumulate over a long period, constant dripping wears away a stone 😄

In my last article, I explained how to install Nacos, and this one will be the focus.

Set up the SpringBoot project

Join the rely on

<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>
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The nacos-config dependency is equivalent to SpringCloud Config, and the nacos-Discovery dependency is equivalent to Eureka.

Configuration center

Create the bootstrap.yml file in the project and add the following configuration:

spring:
  application:
  # service name
    name: naocs-service
  profiles:
    active: dev
  cloud:
    nacos:
      config:
      # config file environment
        group: ${spring.profiles.active}
      Format of the configuration file
        file-extension: yaml
       Configure the address of the center
        server-addr: 47.105198.54.: 8848
      # configure file prefix
        prefix: ${spring.application.name}
     # namespaces
        namespace: mall
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Then log in to NacOS and select Configuration Management on the NacOS page to create a configuration file

There are three main things to configure: DataID, Group, and what to configure.

${prefix}-${spring.profile.active}.${file-extension}.

• ${prefix}The default value isspring.application.nameIs also available through the configuration itemspring.cloud.nacos.config.prefixTo configure.
• ${spring.profile.active} : indicates the current environmentprofile, note: whenspring.profiles.activeWhen null, the corresponding concatenation – will also not exist, and the DataID concatenation format will become${prefix}.${file-extension}.
• ${file-extension}Indicates the extension of the configuration file, which can be passed through the configuration itemspring.cloud.nacos.config.file-extensionTo configure. Currently only supportedproperties 和 yamlType.

A Group is a Group. In this article, it is divided according to the environment. For example, dev, test, uAT.Author configuration:

• Data Id: naocs – service – dev. Yaml

• Group ：dev

• Creating a Namespace

Provide the Controller for the test

@RestController
@RefreshScope   // Dynamic refresh
public class HelloController {

    @Value("${name}")
    private String name;
    @GetMapping
    public String hell(a){
        returnname; }}Copy the code

Then call interface: http://localhost:8080/hello

The registry

Unshackle nacos-Discovery dependency annotations. Then add the following configuration under the nacOS node of the bootstrap.yml file:

      discovery:
        server-addr: 47.105198.54.: 8848
        group: ${spring.profiles.active}
        namespace: mall
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Start the project and log in to NACOS. You can seeService Management – Service listContains information about registered services.

Load multiple configuration files

In real development, it would be impossible to put all the configurations in the same configuration file at the same time; it would be too many and messy.

product-dev.yaml

Create a new product-dev.yaml file, which you can also use.

spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    # MySQL configuration
    driverClassName: com.mysql.cj.jdbc.Driver
    url: JDBC: mysql: / / 47.105.198.54:3306 / test? useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=Asia/Shanghai
    username: root
    password: xxxx
  jackson:
    date-format: yyyy-MM-dd HH:mm:ss If a string representation is used, format it with this line
    timezone: GMT+8
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
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Yaml = datasource-dev. Yaml = mybatis-plus-dev.

datasource-dev.yaml

spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    # MySQL configuration
    driverClassName: com.mysql.cj.jdbc.Driver
    url: JDBC: mysql: / / 47.105.198.54:3306 / test? useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=Asia/Shanghai
    username: root
    password: xxxx
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mybatis-plus-dev.yaml

mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
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Then add the configuration under the config node in the bootstrap.yml application:

spring:
  profiles:
    active: ${DEPLOY_ENV}
  application:
    name: product
  cloud:
    nacos:
      config:
        group: ${spring.profiles.active}
        file-extension: yaml
        server-addr: ${NACOS}
        prefix: ${spring.application.name}
        namespace: ${nacos.client.namespace}
        extension-configs:
          - dataId: datasource-${spring.profiles.active}.yaml
            group: ${spring.profiles.active}
            # Whether to refresh automatically
            refresh: true
          - dataId: mybatis-plus-${spring.profiles.active}.yaml
            group: ${spring.profiles.active}
            refresh: true
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Note that ${DEPLOY_ENV} and ${NACOS} are startup configurations that correspond to the loading environment such as dev and NACOS address such as 47.105.198.54:8848.