要会用,首先要了解。图懒得画,借鉴网上大牛的图吧,springcloud组建架构如图:
微服务架构的应用场景:
1、系统拆分,多个子系统
2、每个子系统可部署多个应用,应用之间负载均衡实现
3、需要一个服务注册中心,所有的服务都在注册中心注册,负载均衡也是通过在注册中心注册的服务来使用一定策略来实现。
4、所有的客户端都通过同一个网关地址访问后台的服务,通过路由配置,网关来判断一个URL请求由哪个服务处理。请求转发到服务上的时候也使用负载均衡。
5、服务之间有时候也需要相互访问。例如有一个用户模块,其他服务在处理一些业务的时候,要获取用户服务的用户数据。
6、需要一个断路器,及时处理服务调用时的超时和错误,防止由于其中一个服务的问题而导致整体系统的瘫痪。
7、还需要一个监控功能,监控每个服务调用花费的时间等。
Spring Cloud的优势
- 产出于spring大家族,spring在企业级开发框架中无人能敌,来头很大,可以保证后续的更新、完善。比如dubbo现在就差不多死了
- 有spring Boot 这个独立干将可以省很多事,大大小小的活spring boot都搞的挺不错。
- 作为一个微服务治理的大家伙,考虑的很全面,几乎服务治理的方方面面都考虑到了,方便开发开箱即用。
- Spring Cloud 活跃度很高,教程很丰富,遇到问题很容易找到解决方案
- 轻轻松松几行代码就完成了熔断、均衡负责、服务中心的各种平台功能
项目架构:
一、discovery服务注册发现
①、pom.xml
- <?xml version="1.0"?>
- <project
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
- xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <modelVersion>4.0.0</modelVersion>
- <parent>
- <groupId>com.gt</groupId>
- <artifactId>popuserver</artifactId>
- <version>0.0.1-SNAPSHOT</version>
- </parent>
- <artifactId>discovery</artifactId>
- <name>discovery</name>
- <url>http://www.popumusic</url>
- <properties>
- <start-class>com.wisely.discovery.DiscoveryApplication</start-class>
- </properties>
- <dependencies>
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-starter-eureka-server</artifactId>
- </dependency>
- </dependencies>
- <build>
- <plugins>
- <plugin>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-maven-plugin</artifactId>
- </plugin>
- </plugins>
- </build>
- </project>
②、DiscoveryApplication
- package com.wisely.discovery;
- import org.springframework.boot.SpringApplication;
- import org.springframework.boot.autoconfigure.SpringBootApplication;
- import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
- @SpringBootApplication
- @EnableEurekaServer //1
- public class DiscoveryApplication {
- public static void main(String[] args) {
- SpringApplication.run(DiscoveryApplication.class, args);
- }
- }
③、application.yml
- server:
- port: 8761
- endpoints:
- shutdown:
- enabled: true
- sensitive: false
- eureka:
- instance:
- prefer-ip-address: true #启用IP方式
- ip-address: 127.0.0.1
- client:
- register-with-eureka: false #指向其他注册中心地址
- fetch-registry: false
- service-url:
- defualtZone: http://127.0.0.1:8762/eureka/
二、monitor监控服务
①、pom.xml
- <?xml version="1.0"?>
- <project
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
- xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <modelVersion>4.0.0</modelVersion>
- <parent>
- <groupId>com.gt</groupId>
- <artifactId>popuserver</artifactId>
- <version>0.0.1-SNAPSHOT</version>
- </parent>
- <groupId>com.poputar</groupId>
- <artifactId>popumonitor</artifactId>
- <version>0.0.1-SNAPSHOT</version>
- <name>popumonitor</name>
- <url>http://maven.apache.org</url>
- <properties>
- <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
- </properties>
- <dependencies>
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-starter</artifactId>
- <version>1.1.7.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
- <version>1.2.2.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-starter-turbine</artifactId>
- <version>1.1.7.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>junit</groupId>
- <artifactId>junit</artifactId>
- <version>3.8.1</version>
- <scope>test</scope>
- </dependency>
- </dependencies>
- <build>
- <plugins>
- <plugin>
- <groupId>com.spotify</groupId>
- <artifactId>docker-maven-plugin</artifactId>
- <configuration>
- <imageName>${project.name}:${project.version}</imageName>
- <dockerDirectory>${project.basedir}/src/main/docker</dockerDirectory>
- <skipDockerBuild>false</skipDockerBuild>
- <resources>
- <resource>
- <directory>${project.build.directory}</directory>
- <include>${project.build.finalName}.jar</include>
- </resource>
- </resources>
- </configuration>
- </plugin>
- </plugins>
- </build>
- </project>
②、PopumonitorApplication
- package com.poputar;
- import org.springframework.boot.SpringApplication;
- import org.springframework.boot.autoconfigure.SpringBootApplication;
- import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
- import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
- import org.springframework.cloud.netflix.turbine.EnableTurbine;
- /**
- * 监控服务
- *
- */
- @SpringBootApplication
- @EnableEurekaClient
- @EnableHystrixDashboard
- @EnableTurbine
- public class PopumonitorApplication
- {
- public static void main( String[] args )
- {
- SpringApplication.run(PopumonitorApplication.class, args);
- }
- }
③、application.yml
- server:
- port: 8989
④、bootstrap.yml
- spring:
- application:
- name: monitor
- eureka:
- instance:
- nonSecurePort: ${server.port:8989}
- client:
- serviceUrl:
- defaultZone: http://${eureka.host:localhost}:${eureka.port:8761}/eureka/
①、pom.xml
- <?xml version="1.0"?>
- <project
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
- xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <modelVersion>4.0.0</modelVersion>
- <parent>
- <groupId>com.gt</groupId>
- <artifactId>popuserver</artifactId>
- <version>0.0.1-SNAPSHOT</version>
- </parent>
- <groupId>com.poputar</groupId>
- <artifactId>popuconfig</artifactId>
- <version>0.0.1-SNAPSHOT</version>
- <name>popuconfig</name>
- <url>http://maven.apache.org</url>
- <properties>
- <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
- </properties>
- <dependencies>
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-starter</artifactId>
- <version>1.1.7.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-config-server</artifactId>
- <version>1.2.2.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-starter-eureka</artifactId>
- <version>1.1.7.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>junit</groupId>
- <artifactId>junit</artifactId>
- <version>3.8.1</version>
- <scope>test</scope>
- </dependency>
- </dependencies>
- <build>
- <plugins>
- <plugin>
- <groupId>com.spotify</groupId>
- <artifactId>docker-maven-plugin</artifactId>
- <configuration>
- <imageName>${project.name}:${project.version}</imageName>
- <dockerDirectory>${project.basedir}/src/main/docker</dockerDirectory>
- <skipDockerBuild>false</skipDockerBuild>
- <resources>
- <resource>
- <directory>${project.build.directory}</directory>
- <include>${project.build.finalName}.jar</include>
- </resource>
- </resources>
- </configuration>
- </plugin>
- </plugins>
- </build>
- </project>
②、PopuconfigApplication
- package org.popuconfig;
- import org.springframework.boot.SpringApplication;
- import org.springframework.boot.autoconfigure.SpringBootApplication;
- import org.springframework.cloud.config.server.EnableConfigServer;
- import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
- /**
- * 配置服务
- *
- */
- @SpringBootApplication
- @EnableConfigServer
- @EnableEurekaClient
- public class PopuconfigApplication
- {
- public static void main( String[] args )
- {
- SpringApplication.run(PopuconfigApplication.class, args);
- }
- }
③、application.yml 配置文件放本地,读者可以自己研究下放在git服务上
- spring:
- cloud:
- config:
- server:
- native:
- search-locations: classpath:/config
- server:
- port: 8762
④、bootstrap.yml
- spring:
- application:
- name: config #1
- profiles:
- active: native #2
- eureka:
- instance:
- non-secure-port: ${server.port:8762} #3
- metadata-map:
- instanceId: ${spring.application.name}
- client:
- service-url:
- defaultZone: http://${eureka.host:localhost}:${eureka.port:8761}/eureka/ #5
⑤、src/main/resources/config下放应用所需的配置文件,命名方式跟appname相同,切记此处的命名是有规范的
四、用户服务
①、pom.xml 需要引入外部jar包时,我已做注释,如下:
- <?xml version="1.0"?>
- <project
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
- xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <modelVersion>4.0.0</modelVersion>
- <parent>
- <groupId>com.gt</groupId>
- <artifactId>popuserver</artifactId>
- <version>0.0.1-SNAPSHOT</version>
- </parent>
- <artifactId>popuman</artifactId>
- <name>popuman</name>
- <url>http://www.popumusic</url>
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-data-redis</artifactId>
- </dependency>
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-starter-eureka</artifactId>
- </dependency>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-data-jpa</artifactId>
- </dependency>
- <dependency>
- <groupId>mysql</groupId>
- <artifactId>mysql-connector-java</artifactId>
- </dependency>
- <dependency>
- <groupId>org.springframework.cloud</groupId>
- <artifactId>spring-cloud-starter-config</artifactId>
- </dependency>
- <dependency>
- <groupId>aliyun-java-sdk-dysmsapit</groupId>
- <artifactId>aliyun-java-sdk-dysmsapi</artifactId>
- <version>1.0.0</version>
- <scope>system</scope>
- <systemPath>${project.basedir}/lib/aliyun-java-sdk-dysmsapi-1.0.0.jar</systemPath>
- </dependency>
- <dependency>
- <groupId>aliyun-java-sdk-core</groupId>
- <artifactId>aliyun-java-sdk-core</artifactId>
- <version>3.3.1</version>
- <scope>system</scope>
- <systemPath>${project.basedir}/lib/aliyun-java-sdk-core-3.3.1.jar</systemPath>
- </dependency>
- </dependencies>
- <build>
- <plugins>
- <plugin>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-maven-plugin</artifactId>
- </plugin>
- </plugins>
- <!-- 将外部包打入jar docker部署时需要打开,否则报错,找不到jar -->
- <!-- <resources>
- <resource>
- <directory>lib</directory>
- <targetPath>BOOT-INF/lib/</targetPath>
- <includes>
- <include>**/*.jar</include>
- </includes>
- </resource>
- <resource>
- <directory>src/main/resources</directory>
- <targetPath>BOOT-INF/classes/</targetPath>
- </resource>
- </resources> -->
- </build>
- </project>
②、PopumanApplication 增加了国际化配置
- package com.gt;
- import javax.validation.Validator;
- import org.springframework.boot.SpringApplication;
- import org.springframework.boot.autoconfigure.SpringBootApplication;
- import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
- import org.springframework.context.annotation.Bean;
- import org.springframework.context.support.ResourceBundleMessageSource;
- import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
- @SpringBootApplication
- @EnableEurekaClient
- public class PopumanApplication {
- public static void main(String[] args) {
- SpringApplication.run(PopumanApplication.class, args);
- }
- public ResourceBundleMessageSource getMessageSource() throws Exception {
- ResourceBundleMessageSource rbms = new ResourceBundleMessageSource();
- rbms.setDefaultEncoding("UTF-8");
- rbms.setBasenames("i18n/ValidationMessages");
- return rbms;
- }
- @Bean
- public Validator getValidator() throws Exception {
- LocalValidatorFactoryBean validator = new LocalValidatorFactoryBean();
- validator.setValidationMessageSource(getMessageSource());
- return validator;
- }
- }
③、LocaleConfig 拦截器
- package com.gt;
- import java.util.Locale;
- import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
- import org.springframework.context.annotation.Bean;
- import org.springframework.context.annotation.ComponentScan;
- import org.springframework.context.annotation.Configuration;
- import org.springframework.web.servlet.LocaleResolver;
- import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
- import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
- import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
- import org.springframework.web.servlet.i18n.SessionLocaleResolver;
- @Configuration
- @EnableAutoConfiguration
- @ComponentScan
- public class LocaleConfig extends WebMvcConfigurerAdapter {
- @Bean
- public LocaleResolver localeResolver() {
- SessionLocaleResolver slr = new SessionLocaleResolver();
- // 默认语言
- slr.setDefaultLocale(Locale.US);
- return slr;
- }
- @Bean
- public LocaleChangeInterceptor localeChangeInterceptor() {
- LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
- // 参数名
- lci.setParamName("lang");
- return lci;
- }
- @Override
- public void addInterceptors(InterceptorRegistry registry) {
- registry.addInterceptor(localeChangeInterceptor());
- }
- }
④、MessageManager 读取国际化文件内容
- package com.gt;
- import java.util.Locale;
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.context.MessageSource;
- import org.springframework.context.i18n.LocaleContextHolder;
- import org.springframework.stereotype.Component;
- @Component
- public class MessageManager {
- private static MessageSource messageSource;
- public static String getMsg(String key) {
- Locale locale = LocaleContextHolder.getLocale();
- return messageSource.getMessage(key, null, locale);
- }
- public static String getMsg(String key, String... arg) {
- Locale locale = LocaleContextHolder.getLocale();
- Object[] args = new Object[arg.length];
- for (int i = 0; i < arg.length; i++) {
- args[i] = arg[i];
- }
- return messageSource.getMessage(key, args, locale);
- }
- @Autowired(required = true)
- public void setMessageSource(MessageSource messageSource) {
- MessageManager.messageSource = messageSource;
- }
- }
⑤、application.yml
- debug: true
- server:
- port: 8781
⑥、bootstrap.yml docker环境下部署时需要指定ip,否则找不到配置服务,读取不了配置中心的相关配置
- spring:
- application:
- name: popuman
- cloud:
- config:
- enabled: true
- discovery: #配置服务发现,获取配置信息 配置文件命名要按照springcloud config配置文件命名规则命名
- enabled: true
- service-id: config
- eureka:
- instance:
- appname: popuman
- client:
- service-url:
- defaultZone: http://${eureka.host:localhost}:${eureka.port:8761}/eureka/
- #docker环境下需指定ip才能访问
- #eureka:
- # instance:
- # appname: popuman
- # prefer-ip-address: true #启用IP方式
- # ip-address: 192.168.*.**
- # client:
- # service-url:
- # defaultZone: http://192.168.*.**:8761/eureka/
⑦、logback.xml 日志分级别输出到文件,dubug,error级别日志输出到各自的日志文件
- <configuration>
- <!-- %m输出的信息,%p日志级别,%t线程名,%d日期,%c类的全名,,,, -->
- <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
- <encoder>
- <pattern>%d %p (%file:%line\)- %m%n</pattern>
- <charset>UTF-8</charset>
- </encoder>
- </appender>
- <appender name="popuman"
- class="ch.qos.logback.core.rolling.RollingFileAppender">
- <File>/Users/david/Documents/Poputar/logs/popuman.log</File>
- <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
- <fileNamePattern>/Users/david/Documents/Poputar/logs/popuman.%d.%i</fileNamePattern>
- <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
- <!-- or whenever the file size reaches 64 MB -->
- <maxFileSize>64 MB</maxFileSize>
- </timeBasedFileNamingAndTriggeringPolicy>
- </rollingPolicy>
- <encoder>
- <pattern>
- %d %p (%file:%line\)- %m%n
- </pattern>
- <charset>UTF-8</charset> <!-- 此处设置字符集 -->
- </encoder>
- <filter class="ch.qos.logback.classic.filter.LevelFilter"> <!-- 过滤错误日志 -->
- <level>ERROR</level>
- <onMatch>DENY</onMatch>
- <onMismatch>ACCEPT</onMismatch>
- </filter>
- </appender>
- <appender name="popuman_err"
- class="ch.qos.logback.core.rolling.RollingFileAppender">
- <File>/Users/david/Documents/Poputar/logs/popuman_err.log</File>
- <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
- <fileNamePattern>/Users/david/Documents/Poputar/logs/popuman_err.%d.%i</fileNamePattern>
- <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
- <!-- or whenever the file size reaches 64 MB -->
- <maxFileSize>64 MB</maxFileSize>
- </timeBasedFileNamingAndTriggeringPolicy>
- </rollingPolicy>
- <encoder>
- <pattern>
- %d %p (%file:%line\)- %m%n
- </pattern>
- <charset>UTF-8</charset> <!-- 此处设置字符集 -->
- </encoder>
- <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印错误日志 -->
- <level>ERROR</level>
- <onMatch>ACCEPT</onMatch>
- <onMismatch>DENY</onMismatch>
- </filter>
- </appender>
- <root level="info">
- <appender-ref ref="STDOUT" />
- </root>
- <!-- 输出日志 -->
- <logger name="com.gt" level="DEBUG">
- <appender-ref ref="popuman" />
- <appender-ref ref="popuman_err" />
- </logger>
- </configuration>
五、popumusic项目代码就不贴了,同popuman项目类似。
部署到docker时,切记端口映射好,否则调不通。
六、应用之间服务的调用是通过springcloud的FeignClient调用,这种调用方式同样也是基于http协议,好处是不用我们再去封装httpclient手写post,get请求,通过调用方法的方式就可以调用其他服务接口
本架构采用springboot推荐的JPA方式来处理数据层,缓存采用redis,如果您要问,redis挂掉怎么办?那就要考虑redis的分布式,主从等,这里不做赘述。
spriingcloud是近两年新兴的微服务技术,目前我也是在学习中,如有觉得我写的有不对的地方,还请批评指正,共同交流,学习一门新技术是枯燥的,难免走很多弯路,但是当你突破难关时,那样的轻松是何等畅快!在这里也感谢CSDN上大牛的技术文章分享,有分享才会有进步。希望本文对学习springcloud的同学有所帮助。
推荐几篇springcloud总结比较全的博客,也是本文项目搭建过程借鉴的技术文章
方志鹏大牛博客地址:http://blog.csdn.net/forezp/article/category/6830968/1
司青博客:http://blog.csdn.net/neosmith/article/details/52449921
http://blog.csdn.net/f1576813783/article/details/76805195