microservicecloud-eureka-7001
application.yml
server:
port: 7001
eureka:
server:
# enable-self-preservation: false #取消自我我保护机制
instance:
hostname: eureka7001.com #eureka服务端的实例名称
client:
register-with-eureka: false #false表示不向注册中心注册自己。
fetch-registry: false #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
service-url:
# defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/ # 单机 设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址（单机）。
defaultZone: http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
主启动类:
@SpringBootApplication
//表明是EurekaServer 接受其他服务注册
@EnableEurekaServer
public class EurekaServer7001_App {
public static void main(String[] args) {
SpringApplication.run(EurekaServer7001_App.class,args);
}
}依赖:
<!--eureka-server服务端 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka-server</artifactId>
</dependency>microservicecloud-eureka-7002
application.yml
server:
port: 7002
eureka:
server:
# enable-self-preservation: false #取消自我我保护机制
instance:
hostname: eureka7002.com #eureka服务端的实例名称
client:
register-with-eureka: false #false表示不向注册中心注册自己。
fetch-registry: false #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
service-url:
# defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/ # 单机 设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址（单机）。
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7003.com:7003/eureka/主启动类:
@SpringBootApplication
//表明是EurekaServer 接受其他服务注册
@EnableEurekaServer
public class EurekaServer7002_App {
public static void main(String[] args) {
SpringApplication.run(EurekaServer7002_App.class,args);
}
}依赖同上
microservicecloud-eureka-7003
application.yml
server:
port: 7003
eureka:
server:
# enable-self-preservation: false #取消自我我保护机制
instance:
hostname: eureka7003.com #eureka服务端的实例名称
client:
register-with-eureka: false #false表示不向注册中心注册自己。
fetch-registry: false #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
service-url:
# defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/ # 单机 设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址（单机）。
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/主启动类:
@SpringBootApplication
//表明是EurekaServer 接受其他服务注册
@EnableEurekaServer
public class EurekaServer7003_App {
public static void main(String[] args) {
SpringApplication.run(EurekaServer7003_App.class,args);
}
}依赖同上
启动项目:microservicecloud-eureka-7001,microservicecloud-eureka-7002,microservicecloud-eureka-7003
访问任意eureka的host:端口号都能看到eureka面板
Eureka客户端是要注册到Eureka上的服务
microservicecloud-provider-dept-8001
application.yml
server:
port: 8001
mybatis:
config-location: classpath:mybatis/mybatis.cfg.xml # mybatis配置文件所在路径
type-aliases-package: com.atguigu.springcloud.entities # 所有Entity别名类所在包
mapper-locations:
- classpath:mybatis/mapper/**/*.xml # mapper映射文件
spring:
application:
name: microservicecloud-dept
datasource:
type: com.alibaba.druid.pool.DruidDataSource # 当前数据源操作类型
driver-class-name: org.gjt.mm.mysql.Driver # mysql驱动包
url: jdbc:mysql://localhost:3306/cloudDB01 # 数据库名称
username: root
password: 123456
dbcp2:
min-idle: 5 # 数据库连接池的最小维持连接数
initial-size: 5 # 初始化连接数
max-total: 5 # 最大连接数
# max-wait-millis: 200 # 等待连接获取的最大超时时间
# spring-cloud部分
eureka:
client: #客户端注册进eureka服务列表内
service-url:
# defaultZone: http://localhost:7001/eureka
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
#自定义instance信息
instance:
instance-id: microservicecloud-dept8001
prefer-ip-address: true #访问路径可以显示IP地址
# /info监控信息
info:
app.name: atguigu-microservicecloud
company.name: www.atguigu.com
build.artifactId: $project.artifactId$
build.version: $project.version$
主启动类:
@SpringBootApplication
//开启EurekaClient功能 自动注册到EurekaServer
@EnableEurekaClient
//开启服务发现功能
@EnableDiscoveryClient
public class DeptProvider8001_App {
public static void main(String[] args) {
SpringApplication.run(DeptProvider8001_App.class,args);
}
}@EnableDiscoveryClient是非必须的,但是添加了@EnableDiscoveryClient注解可以使用客户端的服务发现功能,容器中会实例化一个DiscoveryClient的实现类,在客户端注入后可以通过此类完成服务发现操作
依赖:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>启动项目
microservicecloud-eureka-7001,microservicecloud-eureka-7002,microservicecloud-eureka-7003，microservicecloud-provider-dept-8001
后会在Eureka面板上看见有一个新的实例,实例名是spring.application.name全转成大写，服务名一致代表同一种服务,显示在同一行
Ribbon是一个客户端负载均衡工具,是一个Eureka客户端
microservicecloud-consumer-dept-80
application.yml
server:
port: 80
eureka:
client: #客户端注册进eureka服务列表内
service-url:
# defaultZone: http://localhost:7001/eureka
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
register-with-eureka: false主启动类:
@SpringBootApplication
@EnableEurekaClient
//在启动该微服务的时候就能去加载我们的自定义Ribbon配置类，从而使配置生效
@RibbonClient(name="MICROSERVICECLOUD-DEPT",configuration= MySelfRule.class)
public class DeptConsumer80_App
{
public static void main(String[] args)
{
SpringApplication.run(DeptConsumer80_App.class, args);
}
}依赖:
<!-- Ribbon相关 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-ribbon</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>配置类:
@Configuration
public class ConfigBean //boot -->spring applicationContext.xml --- @Configuration配置 ConfigBean = applicationContext.xml
{
@Bean
@LoadBalanced//开启Ribbon负载均衡
public RestTemplate getRestTemplate()
{
return new RestTemplate();
}
/**
* 选择负载均衡算法
* @return
*/
@Bean
public IRule myRule()
{
//return new RoundRobinRule();
return new RandomRule();//达到的目的，用我们重新选择的随机算法替代默认的轮询。
// return new RetryRule();
}
}这里配置类主要配置了一个RestTemplate,可以利用它通过服务名调用注册到Eureka的服务
调用方式如下:
DeptController_Consumer.java
@RestController
public class DeptController_Consumer
{
// private static final String REST_URL_PREFIX = "http://localhost:8001";//直接调用
private static final String REST_URL_PREFIX = "http://MICROSERVICECLOUD-DEPT";//通过Eureka调用
/**
* 使用 使用restTemplate访问restful接口非常的简单粗暴无脑。 (url, requestMap,
* ResponseBean.class)这三个参数分别代表 REST请求地址、请求参数、HTTP响应转换被转换成的对象类型。
*/
@Autowired
private RestTemplate restTemplate;
@RequestMapping(value = "/consumer/dept/add")
public boolean add(Dept dept)
{
return restTemplate.postForObject(REST_URL_PREFIX + "/dept/add", dept, Boolean.class);
}
@RequestMapping(value = "/consumer/dept/get/{id}")
public Dept get(@PathVariable("id") Long id)
{
return restTemplate.getForObject(REST_URL_PREFIX + "/dept/get/" + id, Dept.class);
}
@SuppressWarnings("unchecked")
@RequestMapping(value = "/consumer/dept/list")
public List<Dept> list()
{
return restTemplate.getForObject(REST_URL_PREFIX + "/dept/list", List.class);
}
// 测试@EnableDiscoveryClient,消费端可以调用服务发现
@RequestMapping(value = "/consumer/dept/discovery")
public Object discovery()
{
return restTemplate.getForObject(REST_URL_PREFIX + "/dept/discovery", Object.class);
}
}主启动类中@RibbonClient注解属性configuration= MySelfRule.class表明使用自己的负载均衡算法配置类
MySelfRule.java不要和主启动类同包或在其子包下,否则会被识别为全局负载均衡算法配置
MySelfRule.java:
@Configuration
public class MySelfRule{
@Bean
public IRule myRule(){
// return new RoundRobinRule();
return new RoundRobinRule_ZDY();//自定义算法
}
}RoundRobinRule_ZDY.java
/**
* 轮询 每个被轮询到的访问五次 接着向下轮询
*/
public class RoundRobinRule_ZDY extends AbstractLoadBalancerRule
{
// total = 0 // 当total==5以后，我们指针才能往下走，
// index = 0 // 当前对外提供服务的服务器地址，
// total需要重新置为零，但是已经达到过一个5次，我们的index = 1
// 分析：我们5次，但是微服务只有8001 8002 8003 三台，OK？
//
private int total = 0; // 总共被调用的次数，目前要求每台被调用5次
private int currentIndex = 0; // 当前提供服务的机器号
public Server choose(ILoadBalancer lb, Object key)
{
if (lb == null) {
return null;
}
Server server = null;
while (server == null) {
if (Thread.interrupted()) {
return null;
}
List<Server> upList = lb.getReachableServers();
List<Server> allList = lb.getAllServers();
int serverCount = allList.size();
if (serverCount == 0) {
/*
* No servers. End regardless of pass, because subsequent passes only get more
* restrictive.
*/
return null;
}
// int index = rand.nextInt(serverCount);// java.util.Random().nextInt(3);
// server = upList.get(index);
// private int total = 0; // 总共被调用的次数，目前要求每台被调用5次
// private int currentIndex = 0; // 当前提供服务的机器号
if(total < 5)
{
server = upList.get(currentIndex);
total++;
}else {
total = 0;
currentIndex++;
if(currentIndex >= upList.size())
{
currentIndex = 0;
}
}
if (server == null) {
/*
* The only time this should happen is if the server list were somehow trimmed.
* This is a transient condition. Retry after yielding.
*/
Thread.yield();
continue;
}
if (server.isAlive()) {
return (server);
}
// Shouldn't actually happen.. but must be transient or a bug.
server = null;
Thread.yield();
}
return server;
}
@Override
public Server choose(Object key)
{
return choose(getLoadBalancer(), key);
}
@Override
public void initWithNiwsConfig(IClientConfig clientConfig)
{
// TODO Auto-generated method stub
}
}再启动一个microservicecloud-provider-dept-8002多次访问即可看见负载均衡起作用
microservicecloud-consumer-dept-feign
feign支持以接口的方式调用服务
接口:
@FeignClient(value = "MICROSERVICECLOUD-DEPT")
public interface DeptClientService
{
@RequestMapping(value = "/dept/get/{id}", method = RequestMethod.GET)
public Dept get(@PathVariable("id") long id);
@RequestMapping(value = "/dept/list", method = RequestMethod.GET)
public List<Dept> list();
@RequestMapping(value = "/dept/add", method = RequestMethod.POST)
public boolean add(Dept dept);
}application.yml
server:
port: 80
eureka:
client: #客户端注册进eureka服务列表内
service-url:
# defaultZone: http://localhost:7001/eureka
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
register-with-eureka: false
feign:
hystrix:
enabled: true主启动类
@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
public class DeptConsumer80_Feign_App
{
public static void main(String[] args)
{
SpringApplication.run(DeptConsumer80_Feign_App.class, args);
}
}配置类:
@Configuration
public class ConfigBean //boot -->spring applicationContext.xml --- @Configuration配置 ConfigBean = applicationContext.xml
{
@Bean
@LoadBalanced//开启Ribbon负载均衡
public RestTemplate getRestTemplate()
{
return new RestTemplate();
}
/**
* 自定义负载均衡算法
* @return
*/
@Bean
public IRule myRule()
{
//return new RoundRobinRule();
return new RandomRule();//达到的目的，用我们重新选择的随机算法替代默认的轮询。
// return new RetryRule();
}
}通过接口调用:
@RestController
@ResponseBody
public class DeptController_Consumer
{
@Autowired
private DeptClientService service;
@RequestMapping(value = "/consumer/dept/get/{id}")
public Dept get(@PathVariable("id") Long id)
{
return this.service.get(id);
}
@RequestMapping(value = "/consumer/dept/list")
public List<Dept> list()
{
return this.service.list();
}
@RequestMapping(value = "/consumer/dept/add")
public Object add(Dept dept)
{
return this.service.add(dept);
}
}依赖:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<!-- feign-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
</dependency>启动项目
microservicecloud-eureka-7001,microservicecloud-eureka-7002,microservicecloud-eureka-7003，microservicecloud-provider-dept-8001,microservicecloud-consumer-dept-feign
进行测试
熔断 是应对雪崩效应的一种微服务链路保护机制 服务发生异常时向调用方返回一个符合预期的,可备选响应(fallback),而不是长时间没有响应或者抛出调用方无法处理的异常
application.yml
server:
port: 8001
mybatis:
config-location: classpath:mybatis/mybatis.cfg.xml # mybatis配置文件所在路径
type-aliases-package: com.atguigu.springcloud.entities # 所有Entity别名类所在包
mapper-locations:
- classpath:mybatis/mapper/**/*.xml # mapper映射文件
spring:
application:
name: microservicecloud-dept
datasource:
type: com.alibaba.druid.pool.DruidDataSource # 当前数据源操作类型
driver-class-name: org.gjt.mm.mysql.Driver # mysql驱动包
url: jdbc:mysql://localhost:3306/cloudDB01 # 数据库名称
username: root
password: 123456
dbcp2:
min-idle: 5 # 数据库连接池的最小维持连接数
initial-size: 5 # 初始化连接数
max-total: 5 # 最大连接数
max-wait-millis: 200 # 等待连接获取的最大超时时间
# spring-cloud部分
eureka:
client: #客户端注册进eureka服务列表内
service-url:
# defaultZone: http://localhost:7001/eureka
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
#自定义instance信息
instance:
instance-id: microservicecloud-dept8001-hystrix
prefer-ip-address: true #访问路径可以显示IP地址
# /info监控信息
info:
app.name: atguigu-microservicecloud
company.name: www.atguigu.com
build.artifactId: $project.artifactId$
build.version: $project.version$
主启动类
@SpringBootApplication
//开启EurekaClient功能 自动注册到EurekaServer
@EnableEurekaClient
//开启服务发现功能
@EnableDiscoveryClient
//开启Hystrix熔断机制
@EnableCircuitBreaker
public class DeptProvider8001_Hystrix_App {
public static void main(String[] args) {
SpringApplication.run(DeptProvider8001_Hystrix_App.class,args);
}
}添加熔断配置
@RestController
public class DeptController
{
@Autowired
private DeptService service;
@RequestMapping(value = "/dept/get/{id}", method = RequestMethod.GET)
@HystrixCommand(fallbackMethod = "processHystrix_Get")
public Dept get(@PathVariable("id") Long id)
{
Dept dept = service.get(id);
if(dept==null){
throw new RuntimeException("没有id为"+id+"的dept记录");
}
return dept;
}
public Dept processHystrix_Get(@PathVariable("id") Long id)
{
return new Dept().setDeptno(id).setDname("该ID：" + id + "没有没有对应的信息,null--@HystrixCommand")
.setDb_source("no this database in MySQL");
}
}依赖:
<!-- hystrix -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
</dependency>
<!-- 将微服务provider侧注册进eureka -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>请求为id不存在的dept会返回自定义的响应
启动项目
microservicecloud-eureka-7001,microservicecloud-eureka-7002,microservicecloud-eureka-7003，microservicecloud-provider-dept-hystrix-8001,microservicecloud-consumer-dept-80
进行测试
通过fign来做熔断
接口
@FeignClient(value = "MICROSERVICECLOUD-DEPT",fallbackFactory=DeptClientServiceFallbackFactory.class)
public interface DeptClientService
{
@RequestMapping(value = "/dept/get/{id}", method = RequestMethod.GET)
public Dept get(@PathVariable("id") long id);
@RequestMapping(value = "/dept/list", method = RequestMethod.GET)
public List<Dept> list();
@RequestMapping(value = "/dept/add", method = RequestMethod.POST)
public boolean add(Dept dept);
}熔断处理类
@Component
public class DeptClientServiceFallbackFactory implements FallbackFactory<DeptClientService> {
@Override
public DeptClientService create(Throwable throwable) {
return new DeptClientService(){
@Override
public Dept get(long id) {
return new Dept().setDeptno(id).setDname("该ID：" + id + "没有没有对应的信息,null--@HystrixCommand")
.setDb_source("no this database in MySQL");
}
@Override
public List<Dept> list() {
return null;
}
@Override
public boolean add(Dept dept) {
return false;
}
};
}
}(重新install microservicecloud-api模块)配合Feign消费端即可生效
启动项目
microservicecloud-eureka-7001,microservicecloud-eureka-7002,microservicecloud-eureka-7003，microservicecloud-config-dept-client-8001,microservicecloud-consumer-dept-feign
进行测试
HystrixDashboard提供了对配置类Hystrix微服务的监控面板,被监控端要添加监控信息依赖
<!-- actuator监控信息完善 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>application.yml
server:
port: 9001主启动类
@SpringBootApplication
@EnableHystrixDashboard
public class DeptConsumer_DashBoard_App {
public static void main(String[] args) {
SpringApplication.run(DeptConsumer_DashBoard_App.class,args);
}
}依赖:
<!-- hystrix dashboard-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
</dependency>访问http://localhost:9001/hystrix按照提示填入要监控的hystrix服务 即可看到监控信息
一般微服务都不直接对外提供访问,外部通过访问同一的网关,由网关代为访问内部的具体服务
application.yml
server:
port: 9527
spring:
application:
name: microservicecloud-zuul-gateway
eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka,http://eureka7003.com:7003/eureka
instance:
instance-id: gateway-9527.com
prefer-ip-address: true
zuul:
#ignored-services: microservicecloud-dept # 忽略真实服务名microservicecloud-dept
prefix: /atguigu #设置公共前缀
ignored-services: "*"
routes:
mydept.serviceId: microservicecloud-dept
mydept.path: /mydept/**
info:
app.name: atguigu-microcloud
company.name: www.atguigu.com
build.artifactId: $project.artifactId$
build.version: $project.version$主启动类
@SpringBootApplication
@EnableZuulProxy
public class Zuul_9527_App {
public static void main(String[] args) {
SpringApplication.run(Zuul_9527_App.class,args);
}
}依赖
<!-- zuul路由网关 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zuul</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>Zuul通过Eureka上的服务名和自己配置文件中对应的路由来转发相应的请求
启动
microservicecloud-config-dept-client-8001,microservicecloud-zuul-gateway-9527
Eureka集群
访问http://localhost:9527/atguigu/mydept/dept/get/1
进行测试
通过SpringCloudConfig配置中心的功能,可以把配置文件统一放在Git仓库中管理
application.yml
server:
port: 3344
spring:
application:
name: microservicecloud-config
cloud:
config:
server:
git:
skipSslValidation: true
uri: [email protected]:Yanshaoshuai/microservicecloud-config.git #GitHub上面的git仓库名字主启动类
@SpringBootApplication
@EnableConfigServer
public class Config_3344_StartSpringCloudApp
{
public static void main(String[] args)
{
SpringApplication.run(Config_3344_StartSpringCloudApp.class, args);
}
}依赖
<!-- springCloud Config -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
<!-- 避免Config的Git插件报错：org/eclipse/jgit/api/TransportConfigCallback -->
<dependency>
<groupId>org.eclipse.jgit</groupId>
<artifactId>org.eclipse.jgit</artifactId>
<version>4.10.0.201712302008-r</version>
</dependency>git仓库地址: [email protected]:Yanshaoshuai/microservicecloud-config.git
文件内容如下:
microservicecloud-config-client.yml
spring:
profiles:
active:
- dev
---
server:
port: 8201
spring:
profiles: dev
application:
name: microservicecloud-config-client
eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka/
---
server:
port: 8202
spring:
profiles: test
application:
name: microservicecloud-config-client
# spring-cloud部分
eureka:
client: #客户端注册进eureka服务列表内
service-url:
defaultZone: http://eureka7001.com:7001/eureka/检查服务端是否可以正确获取配置文件:
访问http://config-3344.com:3344/master/microservicecloud-config-client-dev.yml会返回dev配置内容
其他从SpringCloudConfig上获取配置文件的服务都是SpringCloudConfig客户端
application.yml(非必须)
spring:
application:
name: microservicecloud-config-clientbootstrap.yml
spring:
cloud:
config:
name: microservicecloud-config-client #需要从github上读取的资源名称，注意没有yml后缀名
profile: dev #本次访问的配置项
label: master
uri: http://config-3344.com:3344 #本微服务启动后先去找3344号服务，通过SpringCloudConfig获取GitHub的服务地址客户端查看配置是否正确获取:
@RestController
public class ConfigClientRest
{
@Value("${spring.application.name}")
private String applicationName;
@Value("${eureka.client.service-url.defaultZone}")
private String eurekaServers;
@Value("${server.port}")
private String port;
@RequestMapping("/config")
public String getConfig()
{
String str = "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
System.out.println("******str: " + str);
return "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
}
}启动客户端访问localhost:8201/config可以看到相关配置信息
可能报错及解决:
在练习SpringCloudConfig配置中心时，访问git上的配置文件，会出现报错 JSchException: Auth fail，
无论使用本地的ssh配置，还是在application.yml中配置private-key都会报错，
经过各种尝试最终发现使用这种方式生成的rsa-key，并配置到github上后问题解决
ssh-keygen -m PEM -t rsa -b 4096 -C "[email protected]"
之前用下面方式生成的rsa-key，在git bash中操作没问题，但在SpringCloudConfig中不好使
ssh-keygen -t rsa -C "[email protected]"
原因可能是
第一种方式生成的私钥是以BEGIN RSA PRIVATE KEY开头，END RSA PRIVATE KEY结尾，
第二种方式生成的私钥是以BEGIN OPENSSH PRIVATE KEY开头，END OPENSSH PRIVATE KEY结尾，
SpringCloudConfig访问git的组件不支持openssh这种格式的秘钥。