consul做配置中心

news2024/11/8 18:42:58

1. 分布式配置中心

consul不仅可做注册中心，还可做配置中心
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applicaiton.yml与bootstrap.yml:

applicaiton.yml是用户级的资源配置项
bootstrap.yml是系统级的，优先级更加高

Spring Cloud会创建一个“Bootstrap Context”，作为Spring应用的Application Context的父上下文。初始化的时候，Bootstrap Context负责从外部源加载配置属性并解析配置。这两个上下文共享一个从外部获取的Environment。

2. 添加依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-consul-config</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>

3. 新增bootstrap.yml

spring:
  application:
    name: cloud-payment-service
    ####Spring Cloud Consul for Service Discovery
  cloud:
    consul:
      host: localhost
      port: 8500
      discovery:
        service-name: ${spring.application.name}
      config:
        profile-separator: '-' # default value is ","，we update '-'
        format: YAML

# config/cloud-payment-service/data
#       /cloud-payment-service-dev/data
#       /cloud-payment-service-prod/data

修改application.yml

server:
  port: 8001

# ==========applicationName + druid-mysql8 driver===================
spring:
#  application:
#    name: cloud-payment-service

  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db2024?characterEncoding=utf8&useSSL=false&serverTimezone=GMT%2B8&rewriteBatchedStatements=true&allowPublicKeyRetrieval=true
    username: root
    password: root

  profiles:
    active: dev  # 多环境配置加载内容dev/prod,不写就是默认default配置

  ####Spring Cloud Consul for Service Discovery
#  cloud:
#    consul:
#      host: localhost
#      port: 8500
#      discovery:
#        service-name: ${spring.application.name}

# ========================mybatis===================
mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.hong.entity
  configuration:
    map-underscore-to-camel-case: true

4. consul服务器k/v配置填写

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配置文件首层目录名必须为config,目录后面带/.官网默认分割方式为**,本文改为-**
最底层文件名必须为data,不带/

5. 测试获取consul中的配置

PayController中添加如下代码

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

    @GetMapping(value = "/pay/getConfigInfoByConsul")
    @Operation(summary = "测试查询consul配置信息",description = "测试查询consul配置信息")
    public String getConfigInfoByConsul(@Value("${payment8001.info}") String consulInfo){
        return "consulInfo: " + consulInfo +"\t"+ " port: " + port;
    }