【consul】使用学习

转载：https://www.cnblogs.com/yangchongxing/p/10653791.html

1、下载 consul

https://www.consul.io

2、Window系统使用

开发模式启动，启动后以前配置会丢失

consul agent -dev

导出配置

consul kv export > kv.json

导入配置

consul kv import @kv.json

3、将 Spring Boot 为服务注册到服务代理

bootstrap.yml 文件

server:
port: 0
spring:
application:
name: consul-client
cloud:
consul:
host: dev.consul.ycx
port: 8500
config:
format: yaml
discovery:
prefer-ip-address: true
health-check-interval: 3s
health-check-path: /actuator/health
instance-id: ${spring.application.name}:${vcap.application.instance_id:${spring.application.instance_id:${random.value}}}

consul Key / Value < config < application

如果在 config 目录下有应用名目录 consul-client 也就是 spring.application.name=consul-client 指定的目录下data中有相同的配置，就会覆盖 application 下的配置

pom 依赖

http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
org.springframework.boot spring-boot-starter-parent 2.1.4.RELEASE
com.example
consulclient
0.0.1-SNAPSHOT
consulclient
Demo project for Spring Boot

<properties>  
    <java.version>1.8</java.version>  
    <spring-cloud.version>Greenwich.SR1</spring-cloud.version>  
</properties>

<dependencies>  
    <dependency>  
        <groupId>org.springframework.boot</groupId>  
        <artifactId>spring-boot-starter-web</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework.cloud</groupId>  
        <artifactId>spring-cloud-starter</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework.cloud</groupId>  
        <artifactId>spring-cloud-starter-consul-config</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework.cloud</groupId>  
        <artifactId>spring-cloud-starter-consul-discovery</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework.boot</groupId>  
        <artifactId>spring-boot-starter-actuator</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework.boot</groupId>  
        <artifactId>spring-boot-starter-test</artifactId>  
        <scope>test</scope>  
    </dependency>  
</dependencies>

<dependencyManagement>  
    <dependencies>  
        <dependency>  
            <groupId>org.springframework.cloud</groupId>  
            <artifactId>spring-cloud-dependencies</artifactId>  
            <version>${spring-cloud.version}</version>  
            <type>pom</type>  
            <scope>import</scope>  
        </dependency>  
    </dependencies>  
</dependencyManagement>

<build>  
    <plugins>  
        <plugin>  
            <groupId>org.springframework.boot</groupId>  
            <artifactId>spring-boot-maven-plugin</artifactId>  
        </plugin>  
    </plugins>  
</build>

@EnableDiscoveryClient 在Edgware版本是可选的。

package com.example.consulclient;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
// @EnableDiscoveryClient 在Edgware版本是可选的
public class ConsulclientApplication {

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

@Value("${ycx.info}")  
private String info;

@RequestMapping("/consul")  
public Object index() {  
    return info;  
}  

}

bootstrap.yml  参考配置

spring:
application:
name: ${project.name}
profiles:
active: dev
cloud:
consul:
host: dev.consul.ycx
port:
config:
# enabled为true表示启用配置管理功能
enabled: true
# watch选项为配置监视功能，主要监视配置的改变
watch:
enabled: true
delay:
wait-time:
# 表示如果没有发现配置，是否抛出异常，true为是，false为否，当为false时，consul会打印warn级别的日志信息
fail-fast: false
# 表示使用的配置格式
format: yaml
# 服务发现配置
discovery:
# 启用服务发现
enabled: true
# 启用服务注册
register: true
# 服务停止时取消注册
deregister: true
# 表示注册时使用IP而不是hostname
prefer-ip-address: true
# 执行监控检查的频率
health-check-interval: 15s
# 设置健康检查失败多长时间后，取消注册
health-check-critical-timeout: 15s
# 健康检查的路径
health-check-path: /actuator/health
# 服务注册标识，格式为：应用名称+服务器IP+端口
instance-id: ${spring.application.name}:${vcap.application.instance_id:${spring.application.instance_id:${random.value}}}

Key / Values < config < application 参考配置

server:
port:
logging:
level:
root: INFO
spring:
jackson:
date-format: yyyy-MM-dd HH:mm:ss
time-zone: GMT+
default-property-inclusion: non_null
mybatis-plus:
mapper-locations: classpath*:mapper/*.xml
configuration:
auto-mapping-behavior: partial
auto-mapping-unknown-column-behavior: warning
global-config:
db-config:
logic-delete-value: -1 # 逻辑已删除值(默认为 1)
logic-not-delete-value: 1 # 逻辑未删除值(默认为 0)
feign:
client:
config:
default:
connect-timeout: 20000
read-timeout: 20000