spring java 动态获取consul K/V

spring java 动态获取consul K/V

1.springConsul配置kv路径

spring:
    cloud:
	    consul:
	      enabled: ${CONSUL_ENABLED:true}
	      host: ${CONSUL_HOST:localhost}
	      port: ${CONSUL_PORT:8500}
	      config:
	        prefix: ${CONSUL_CONFIG_PREFIX:config} #consul kv前缀
	        fail-fast: ${CONFIG_FAIL_FAST:false} #两个fail-fast结合实现启动服务时当consul不存在时服务能正常启动
	        format: YAML    # 表示consul上面文件的格式 有四种 YAML PROPERTIES KEY-VALUE FILES
	        data-key: ${CONSUL_DATA_KEY:data}    #表示consul上面的KEY值(或者说文件的名字) 默认是data
	        # watch选项为配置监视功能，主要监视配置的改变
	        watch:
	          enabled: true
	          delay: ${WATCH_DELAY:${consul.watch.delay:2000}}
	          wait-time: ${WATCH_WAIT-TIME:20}
	        default-context: ${CONSUL_DEFAULT_CONTEXT:baseconfig}
	        prefixes:
	          - config
	      discovery:
	        fail-fast: ${DISCOVERY_FAIL_FAST:false}
	        catalogServicesWatchDelay: ${CONSUL_DISCOVERY_CATALOG_SERVICES_WAtCH_DELAY:2000} #目录监听延迟
	        heartbeat:
	          enabled: ${HEARTBEAT_ENABLE:true} #两个fail-fast结合实现启动服务时当consul不存在时服务能正常启动
	          reregister-service-on-failure: ${HEARTBEAT_REREGISTER:true} #当ttl重试时,若服务不存在是否重新注册服务
	          ttl: ${HEARTBEAT_TTL_VALUE:20}s
	        enabled: true # 启用服务发现
	        prefer-ip-address: true # 表示注册时使用IP而不是hostname
	        hostname: localhost
	        health-check-path: ${CONSUL_HEALTH_CHECK_PATH:${management.endpoints.web.base-path:/actuator}/health}  #consul默认健康检查地址,可以通过management进行修改
	        health-check-critical-timeout: ${HEALTH_CHECK_CRITICAL_TIMEOUT:60s}  # 健康检查失败多长时间后，取消注册
	        service-name: ${spring.application.name}
	        instance-id: ${spring.application.name}-${spring.cloud.client.ip-address}-${server.port}  # 服务id
	        tags:
	          - ${TAGNAME_GRAYSCALE:graycaletag}=${GRAYSCALE_TAG:${spring.application.name}-${SERVER_SEQUENCE:1}}
	          - ${TAGNAME_SERVICEEXT:serviceext}=${SERVICE_EXT:default}
	        query-passing: true #仅发现健康状态的服务

重点:
spring.cloud.consul.config.prefix consulKV前缀,低版本仅能设置一个
spring.cloud.consul.config.data-key consulKV 最后一级
spring.cloud.consul.config.default-context consulKV中间层级
通过该配置,服务会从consul的KV路径config/baseconfig/data 下的data信息

2.自动注入consulKV到服务中

consul KV 配置为

当服务启动时,服务会从consul的KV对应路径下获取配信息到服务中,再服务中通过注解ConfigurationProperties来获取

@Getter
@Setter
@Component
@ConfigurationProperties("myconsul.kv.test")
public class MyConsulKvTest {
	private String name;
	private String id;
}

当修改consulKV后服务中 MyConsulKvTest 这个bean也会自动更新