多环境运行配置命令
java -jar server3.jar --spring.profiles.active=eureka2
springcloud的注册中心Eureka开发：
一： Server端：
1. build.gradle文件配置:
buildscript {
ext {
springBootVersion = '2.1.2.RELEASE'
}
repositories {
// mavenCentral()
maven {url "http://maven.aliyun.com/nexus/content/groups/public/" }
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
}
}
apply plugin: 'idea'
apply plugin: 'java'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
group = 'springcloud.eureka'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'
repositories {
//mavenCentral()
maven {url "http://maven.aliyun.com/nexus/content/groups/public/" }
}
dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:Finchley.SR2"
}
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
// https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-config
compile group: 'org.springframework.cloud', name: 'spring-cloud-starter-config', version: '2.0.2.RELEASE'
// https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-eureka
compile group: 'org.springframework.cloud', name: 'spring-cloud-starter-eureka-server', version: '1.4.6.RELEASE'
}
2. （Eureka服务器配置为两个节点的集群模式）
application-eureka1.yml配置内容：
spring:
application:
name: Eureka-Server-1
eureka:
instance:
hostname: eureka1
client:
service-url:
defaultZone: http://eureka2:8012/eureka/
# register-with-eureka: false
# fetch-registry: false
server:
port: 8012
application-eureka1.yml配置内容：
spring:
application:
name: Eureka-Server-2
eureka:
instance:
hostname: eureka2
client:
service-url:
defaultZone: http://eureka1:8012/eureka/
# register-with-eureka: false
# fetch-registry: false
server:
port: 8012
3. 需要加入logbak.xml配置文件！！！
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>
<logger name="com.base22" level="TRACE"/>
<root level="debug">
<appender-ref ref="STDOUT" />
</root>
</configuration>
4. 服务入口类：
@EnableEurekaServer
@SpringBootApplication
public class ServerApplication {
public static void main(String[] args) {
SpringApplication.run(ServerApplication.class, args);
}
}
5.将项目打成jar包，传到充当服务器的主机，执行
java -jar server3.jar --spring.profiles.active=eureka2
6. 在客户端主机用游览器访问Eureka.
二 编写部署生产者端
1. build.gradle配置内容如server端，不同处：
// https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-eureka
compile group: 'org.springframework.cloud', name: 'spring-cloud-starter-eureka', version: '1.4.6.RELEASE'
2. application.yml配置内容
spring:
application:
name: Eureka-Provider
eureka:
client:
service-url:
defaultZone: http://localhost:8014/eureka/,http://localhost:8013/eureka/
# register-with-eureka: false
# fetch-registry: false
server:
port: 9090
3. 启动类：
@EnableEurekaClient
@SpringBootApplication
public class ServerApplication {
public static void main(String[] args) {
SpringApplication.run(ServerApplication.class, args);
}
}
4. 提供的服务内容：
@RestController
public class ShowUserController {
@RequestMapping("/user")
public List<User> listUser(){
List<User> users=new ArrayList<User>();
users.add(new User("wanger","110",21));
users.add(new User("zhangsan","120",23));
users.add(new User("lisi","130",26));
return users;
}
}
5. 游览器验证运行状态，server查看加入否。
三. 消费者端配置和部署
1. build.gradle配置内容如server端，不同处：
// https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-eureka
compile group: 'org.springframework.cloud', name: 'spring-cloud-starter-eureka', version: '1.4.6.RELEASE'
2. application.yml配置内容
spring:
application:
name: Eureka-Consumer
eureka:
client:
service-url:
defaultZone: http://localhost:8014/eureka/,http://localhost:8013/eureka/
# register-with-eureka: false
# fetch-registry: false
server:
port: 8888
3. 启动类：
@EnableEurekaClient
@SpringBootApplication
public class ServerApplication {
public static void main(String[] args) {
SpringApplication.run(ServerApplication.class, args);
}
}
4. 与生产者提供的服务对接并使用：
@Service
public class UserService {
@Autowired
private LoadBalancerClient loadBalancerClient;
public List<User> listUser(){
ServiceInstance si=this.loadBalancerClient.choose("Eureka-Provider");
StringBuffer path=new StringBuffer();
path.append("http://").append(si.getHost()).append(":").append(si.getPort()).append("/user");
System.out.println("^^^^^^^^^^^^^^^^^^^^^^^^ ServiceInstance get URI : "+si.getUri());
RestTemplate rt=new RestTemplate();
ParameterizedTypeReference<List<User>> type=new ParameterizedTypeReference<List<User>>(){};
ResponseEntity<List<User>> responseEntity=rt.exchange(path.toString(), HttpMethod.GET,null,type );
List<User> user=responseEntity.getBody();
return user;
}
}
5. 运行，验证。
三. 额外的配置
1. 开启/关闭Eureka的自保护
默认开启自保护
关闭自保护
修改Eureka Server配置文件
eureka:
server:
enableSelfPreservation=false
eviction
interval-time-in-ms: 6000
#单位为毫秒
2.优雅停服
发送关闭(shutdown)命令
配置文件：
#启用shutdown
endpoints.shutdown.enabled=true
#禁用密码验证
endpoints.shutdown.sensitive=fales
必须用post方式发送
http://eureka-abc:9090/shutdown
3.加强Eureka注册中心的安全认证
在Eureka Server中添加security包
spring-boot-starter-security
修改Eureka Server配置文件
#开启http basic的安全认证
security.basic.enabled=true
security.user.name=user
security.user.password=123456
#指向另外的Server要用下面这样带用户名 密码的格式
eureka.client.service-Url.defaultZone=http://user:123456@eureka:8761/eureka/