首先安裝consul環境，參照之前的文章：http://m.ythuaji.com.cn/article/142903.html
項目規劃，2個服務端，1個客戶端
首先來看服務端，
一：服務端1：
項目依賴
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<dependencymanagement> <dependencies> <dependency> <groupid>org.springframework.cloud</groupid> <artifactid>spring-cloud-consul-dependencies</artifactid> <version>1.0.1.release</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencymanagement> <dependencies> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-actuator</artifactid> <version>1.3.5.release</version> </dependency> <dependency> <groupid>org.springframework.cloud</groupid> <artifactid>spring-cloud-starter-consul-discovery</artifactid> </dependency> </dependencies> |
注意，增加spring-boot-actuator是為了項目可以訪問/health 路徑來判斷服務是否健康
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package com.pp.consul1; import org.springframework.boot.springapplication; import org.springframework.boot.autoconfigure.springbootapplication; import org.springframework.cloud.client.discovery.enablediscoveryclient; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.restcontroller; @springbootapplication@enablediscoveryclient@restcontrollerpublic class consulapp { @requestmapping("/home") public object home() { system.out.println("1111111111111"); return "ok11"; } public static void main( string[] args ) { springapplication.run(consulapp.class, args); } } |
application.properties 配置內容
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server.port=9955spring.application.name=consul-server-1spring.cloud.consul.host=192.168.1.100spring.cloud.consul.port=8500spring.cloud.consul.enabled=truespring.cloud.consul.discovery.enabled=truespring.cloud.consul.discovery.instanceid=tomcat1 spring.cloud.consul.discovery.servicename=tomcat spring.cloud.consul.discovery.hostname=192.168.2.95spring.cloud.consul.discovery.port=${server.port} spring.cloud.consul.discovery.healthcheckurl=http://192.168.2.95:9955/health spring.cloud.consul.discovery.healthcheckinterval=10s spring.cloud.consul.discovery.tags=dev |
看過我之前文章的，應該對這些配置很清楚了。這樣，一個服務端就配置寫好了。
由于我們增加了@enablediscoveryclient注解，所以，系統啟動的時候，就會向consul注冊一個服務，服務的名字為tomcat, id為tomcat1
訪問consul的http api /v1/catalog/service/tomcat 輸出如下：
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{ "node":"192.168.1.100", "address":"192.168.1.100", "serviceid":"tomcat1", "servicename":"tomcat", "servicetags":["dev"], "serviceaddress":"192.168.2.95", "serviceport":9955, "serviceenabletagoverride":false, "createindex":993, "modifyindex":1057} |
二：服務端2
項目依賴和上面一樣
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package com.pp.consul2; import org.springframework.boot.springapplication; import org.springframework.boot.autoconfigure.springbootapplication; import org.springframework.cloud.client.discovery.enablediscoveryclient; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.restcontroller; @springbootapplication@enablediscoveryclient@restcontrollerpublic class consulapp { @requestmapping("/home") public object home() { system.out.println("2222222222222222"); return "ok22"; } public static void main( string[] args ) { springapplication.run(consulapp.class, args); } } |
application.properties 配置內容：
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server.port=9966 spring.application.name=consul-server-2spring.cloud.consul.host=192.168.1.100spring.cloud.consul.port=8500spring.cloud.consul.enabled=truespring.cloud.consul.discovery.enabled=truespring.cloud.consul.discovery.instanceid=tomcat2 spring.cloud.consul.discovery.servicename=tomcat spring.cloud.consul.discovery.hostname=192.168.2.95spring.cloud.consul.discovery.port=${server.port} spring.cloud.consul.discovery.healthcheckurl=http://192.168.2.95:9966/health spring.cloud.consul.discovery.healthcheckinterval=10s spring.cloud.consul.discovery.tags=test |
三：客戶端
項目依賴，只需要spring-cloud-starter-consul-discovery
application.properties 配置內容：
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server.port=9977 spring.application.name=consul-client spring.cloud.consul.host=192.168.1.100spring.cloud.consul.port=8500spring.cloud.consul.discovery.register=false |
注意，這里的spring.cloud.consul.discovery.register需要配置成false，否則系統啟動的時候，會向consul注冊一個服務
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package com.pp.client; import org.springframework.beans.factory.annotation.autowired; import org.springframework.boot.springapplication; import org.springframework.boot.autoconfigure.springbootapplication; import org.springframework.cloud.client.discovery.discoveryclient; import org.springframework.cloud.client.discovery.enablediscoveryclient; import org.springframework.cloud.client.loadbalancer.loadbalancerclient; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.restcontroller; @springbootapplication@enablediscoveryclient@restcontrollerpublic class consulclient { @autowired private loadbalancerclient loadbalancer; @autowired private discoveryclient discoveryclient; /** * 從所有服務中選擇一個服務（輪詢） */ @requestmapping("/discover") public object discover() { return loadbalancer.choose("tomcat").geturi().tostring(); } /** * 獲取所有服務 */ @requestmapping("/services") public object services() { return discoveryclient.getinstances("tomcat"); } public static void main( string[] args ) { springapplication.run(consulclient.class, args); } } |
啟動之后，就可以訪問/discover，/services 查看效果了。
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/mn960mn/article/details/51775212
