第 05章 开发前的准备（5.6）

创建api统一网关zuul
：一定要在最后一个启动
pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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>

    <parent>
        <groupId>com.funtl</groupId>
        <artifactId>cbj-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../cbj-dependencies/pom.xml</relativePath>
    </parent>

    <artifactId>cbj-zuul</artifactId>
    <packaging>jar</packaging>


    <dependencies>
        <!-- Spring Boot Begin -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</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>
        <!-- Spring Boot End -->

        <!-- Spring Cloud Begin -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</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-netflix-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
        <!-- Spring Cloud End -->

        <!-- Spring Boot Admin Begin -->
        <dependency>
            <groupId>org.jolokia</groupId>
            <artifactId>jolokia-core</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
        </dependency>
        <!-- Spring Boot Admin End -->
    </dependencies>
    <repositories>
        <repository>
            <id>nexus</id>
            <name>Nexus Repository</name>
            <url>http://192.168.0.15:8081/repository/maven-public/</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
            <releases>
                <enabled>true</enabled>
            </releases>
        </repository>

    </repositories>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.funtl.cbj.zuul.ZuulApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

.gitlab-ci.yml

#步骤
stages:
  - build
  - push
  - run
  - clean

#构建
build:
  stage: build
  script:
    - /usr/local/maven/apache-maven-3.5.3/bin/mvn clean package
    - cp target/cbj-zuul-1.0.0-SNAPSHOT.jar docker
    - cd docker
    - docker build -t 192.168.0.39:5000/cbj-zuul .


#推送
push:
  stage: push
  script:
    - docker push  192.168.0.39:5000/cbj-zuul

#启动服务
run:
  stage: run
  script:
    - cd docker
    - docker-compose up -d

#删除多余镜像
clean :
   stage: clean
   script:
     - docker rmi $(docker images -q -f dangling=true)

新建docker目录
新建docker-compose.yml

version: "3.1"
services:
  cbj-zuul:
      restart: always
      image: 192.168.0.39:5000/cbj-zuul
      container_name: cbj-zuul
      ports:
        - 8769:8769

新建Dockerfile

FROM openjdk:8-jre

MAINTAINER yuyingliang <1079226090@qq.com>

RUN mkdir /app

COPY cbj-zuul-1.0.0-SNAPSHOT.jar /app/app.jar

ENTRYPOINT [ "java", "-Djava.security.egd=file:/dev/./urandom", "-jar", "/app/app.jar","--spring.profiles.active=test"]


EXPOSE 8769

新建src/main/java
新建com.funtl.cbj.zuul包
新建ZuulApplication启动类

package com.funtl.cbj.zuul;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;

@SpringBootApplication
@EnableEurekaClient
@EnableZuulProxy
public class ZuulApplication {
    public static void main(String[] args) {
        SpringApplication.run(ZuulApplication.class, args);
    }

}

创建com.funtl.cbj.zuul.provider包
创建回调类WebAdminFeignFallbackProvider

package com.funtl.cbj.zuul.provider;


import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpResponse;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

public class WebAdminFeignFallbackProvider implements FallbackProvider {

    @Override
    public String getRoute() {
        // ServiceId，如果需要所有调用都支持回退，则 return "*" 或 return null
        return "";
    }

    /**
     * 如果请求服务失败，则返回指定的信息给调用者
     *
     * @param route
     * @param cause
     * @return
     */
    @Override
    public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
        return new ClientHttpResponse() {
            /**
             * 网关向 api 服务请求失败了，但是消费者客户端向网关发起的请求是成功的，
             * 不应该把 api 的 404,500 等问题抛给客户端
             * 网关和 api 服务集群对于客户端来说是黑盒
             * @return
             * @throws IOException
             */
            @Override
            public HttpStatus getStatusCode() throws IOException {
                return HttpStatus.OK;
            }

            @Override
            public int getRawStatusCode() throws IOException {
                return HttpStatus.OK.value();
            }

            @Override
            public String getStatusText() throws IOException {
                return HttpStatus.OK.getReasonPhrase();
            }

            @Override
            public void close() {

            }

            @Override
            public InputStream getBody() throws IOException {
                ObjectMapper objectMapper = new ObjectMapper();
                Map<String, Object> map = new HashMap<>();
                map.put("status", 200);
                map.put("message", "无法连接，请检查您的网络");
                return new ByteArrayInputStream(objectMapper.writeValueAsString(map).getBytes("UTF-8"));
            }

            @Override
            public HttpHeaders getHeaders() {
                HttpHeaders headers = new HttpHeaders();
                // 和 getBody 中的内容编码一致
                headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
                return headers;
            }
        };

    }

}

创建resources
bootstrap.yml

spring:
  cloud:
    config:
      uri: http://localhost:8888
      name: cbj-zuul
      label: master
      profile: dev

bootstrap-test.yml

spring:
  cloud:
    config:
      uri: http://192.168.0.27:8888
      name: cbj-zuul
      label: master
      profile: test

bootstrap-prod.yml

spring:
  cloud:
    config:
      uri: http://192.168.0.27:8888
      name: cbj-zuul
      label: master
      profile: prod