單點搭建
注意:藍色虛線代表註冊;綠色虛線代表調用、紅色虛線代表心跳
1. 添加依賴
創建項目tcloud-gateway-zuulserver , pom.xml內容如下
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId> com.svw.tbox.tcloud.gateway</groupId>
<artifactId>tcloud-gateway-zuulserver</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>tcloud-gateway-zuulserver</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.3.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zuul</artifactId>
</dependency>
</dependencies>
<!-- 引入spring cloud的依賴 -->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Camden.SR4</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
</project>
2. 啓動類開啓zuul
package com.svw.tbox.tcloud.gateway.zuul;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
@SpringBootApplication
@EnableZuulProxy
publicclass ZuulApplication {
publicstaticvoid main(String[] args) {
SpringApplication.run(ZuulApplication.class, args);
}
}
3. application.yml配置端口和註冊到eurekaserver
server:
port: 8200
spring:
application:
name: tcloud-gateway-zuulserver
eureka:
client:
service-url:
defaultZone: http://localhost:8100/eureka/
instance:
prefer-ip-address:true
4. 效果
啓動tcloud-user-eurekaserver 2個實例進程
啓動tcloud-user-provider 2個實例進程
啓動tcloud-user-consumer 1個實例進程
啓動tcloud-gateway-zuulserver
訪問http://localhost:8200/tcloud-user-consumer/user/hrf ,
請求會被Zuul轉發到http://localhost:9000/user/hrf
訪問http://localhost:8200/tcloud-user-provider/getUser ,
請求會被Zuul轉發到http://localhost:8000/getUser
ü 小結
前提條件:
Eureka Server註冊的微服務的serviceId 在此處簡稱ms_id ;
Eureka Server註冊的微服務的IP 在此處簡稱 ms_ip ;
Eureka Server註冊的微服務的端口號 在此處簡稱 ms_port 。
Zuul轉發規則是:
http://網關IP地址:網關端口號/ms_id/**
會被轉發到 =》
http:// ms_ip: ms_port/**
1. 高可用
原理:
Zuul 作爲 Eureka Client ,創建多個ZuulEureka Client註冊到Eureka Server集羣
=>將多個Zuul節點註冊到eureka sever
操作:
1.tcloud-gateway-zuulserver修改依賴pom.xml改成:
server:
port: 8200
spring:
application:
name: tcloud-gateway-zuulserver
eureka:
client:
service-url:
defaultZone: http://localhost:8100/eureka/,http://localhost:8101/eureka/
instance:
prefer-ip-address:true
複製tcloud-gateway-zuulserver 項目 ,命名tcloud-gateway-zuulserver2修改 pom.xml
server:
port: 8201
spring:
application:
name: tcloud-gateway-zuulserver
eureka:
client:
service-url:
defaultZone: http://localhost:8100/eureka/,http://localhost:8101/eureka/
instance:
prefer-ip-address:true
啓動兩個zuul server
=》重啓provider和consumer微服務 ,運行效果和單節點一樣
2. 容錯:Zuul回退
如果微服務下線了,針對每個微服務,都需要回復一箇中文提示,而不是報異常1. 修改zuul server
1. 針對微服務tcloud-user-consumer添加回退類
package com.svw.tbox.tcloud.gateway.zuul.fallback;
import org.springframework.cloud.netflix.zuul.filters.route.ZuulFallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.stereotype.Component;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
@Component
public class ConsumerFallbackProvider implements ZuulFallbackProvider {
@Override
public String getRoute() {
// 表明是爲哪個微服務提供回退
return "tcloud-user-consumer";
}
@Override
public ClientHttpResponse fallbackResponse() {
return new ClientHttpResponse() {
@Override
public HttpStatus getStatusCode() throws IOException {
// fallback時的狀態碼
return HttpStatus.OK;
}
@Override
public int getRawStatusCode() throws IOException {
// 數字類型的狀態碼,本例返回的其實就是200,詳見HttpStatus
return this.getStatusCode().value();
}
@Override
public String getStatusText() throws IOException {
// 狀態文本,本例返回的其實就是OK,詳見HttpStatus
return this.getStatusCode().getReasonPhrase();
}
@Override
public void close() {
}
@Override
public InputStream getBody() throws IOException {
// 響應體
return new ByteArrayInputStream("tcloud-user-consumer微服務不可用,請稍後再試。".getBytes());
}
@Override
public HttpHeaders getHeaders() {
// headers設定
HttpHeaders headers = new HttpHeaders();
MediaType mt = new MediaType("application","json", Charset.forName("UTF-8"));
headers.setContentType(mt);
return headers;
}
};
}
}
2. 效果
按照如下順序啓動:
=> tcloud-base-eurekaserver
=>tcloud-commons-configserver
=>tcloud-gateway-zuulserver
=>tcloud-user-provider
=>tcloud-user-consumer
關閉:tcloud-user-consumer
訪問http://localhost:8200/tcloud-user-consumer/log-instance 出現如下效果:
1. 動態路由
參考3.9.4配置文件動態更新,將網關作爲一個config client,註冊到Eureka、config server ,連接到kafka。
1. Pom.xml添加依賴
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bus-kafka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
2. 添加配置參數
eureka:
client:
service-url:
defaultZone: http://localhost:8100/eureka/
instance:
prefer-ip-address:true
server:
port: 8200
spring:
application:
name: tcloud-gateway
cloud:
stream:
default-binder: kafka
kafka:
binder:
zk-nodes: localhost:2181
brokers: localhost:9092
config:
failFast:true
profile: local
label: develop
discovery:
enabled:true
serviceId: tcloud-commons-config-server
3. 啓動類中註冊自動配置bean @RefreshScope
@SpringBootApplication
@EnableZuulProxy
@EnableFeignClients
@EnableHystrix
publicclass GatewayApplication {
publicstaticvoid main(String[] args) {
SpringApplication.run(GatewayApplication.class, args);
}
@RefreshScope
@ConfigurationProperties("zuul")
public ZuulProperties zuulProperties() {
returnnew ZuulProperties();
}
}
4. 配置路由參數
zuul:
add-host-header:true
routes:
tcloud-security-auth: /auth/**
tcloud-commons-config-server: /config/**
tcloud-gateway: /gateway/**
management:
security:
enabled:false
5. 效果
1. 開啓基礎服務
開啓zookeeper、kafka
2. 寫一個微服務測試controller
tcloud-security-auth ,訪問地址是:http://localhost:8200/auth/mqtt/profile
@RefreshScope
@RestController
@RequestMapping("/mqtt")
publicclass MqttController {
@Value("${profile}")
private String profile;
@RequestMapping(value = "/profile", method = RequestMethod.GET)
public String profile() {
returnprofile;
}
……
3. 修改路由地址
zuul:
add-host-header:true
routes:
tcloud-security-auth: /check/**
tcloud-commons-config-server: /config/**
tcloud-gateway: /gateway/**
management:
security:
enabled:false
4. 請求自動刷新參數
訪問: http://localhost:8300/bus/refresh
5. 再次請求
訪問:http://localhost:8200/check/mqtt/profile
---------------------
作者:行一米
來源:CSDN
原文:https://blog.csdn.net/baidu_36415076/article/details/79533572
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