配置中心服務器
- 配置中心服務器,以版本的管理方式對分佈式系統提供外部配置支持;
- SpringCloud中採用Spring Cloud Config 進行集成,而想要進行實施更新則需要採用spring cloud bus的方式, 如 Rabbit、Kafka 等。
- 版本管理採用 Git
- 這裏採用Kafka,因爲本地有開發測試環境
- 服務註冊與發現參考
- /bus/refresh 爲消息總線帶來的刷新方式,可以手動調用
- destination參數:用於刷新指定的應用服務
- e.g. /bus/refresh?destination=feignserver:8084
配置中心服務
創建配置中心服務module
在build.gradle引入:cloud:spring-cloud-config-server、spring-boot-autoconfigure; 因爲我們還想可以自動更新所以引入 spring-cloud-starter-bus-kafka,引入spring-boot-starter-actuator、spring-cloud-config-monitor用於監聽
build.gradle
apply plugin: 'org.springframework.boot'
dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:"+ springCloudVersion
mavenBom "org.springframework.boot:spring-boot-dependencies:"+ springBootVersion
mavenBom "org.springframework.boot:spring-boot-starter:"+ springBootVersion
}
}
dependencies {
compile('org.springframework.cloud:spring-cloud-config-server')
compile('org.springframework.cloud:spring-cloud-starter-eureka')
compile('org.springframework.boot:spring-boot-autoconfigure')
compile('org.springframework.cloud:spring-cloud-starter-bus-kafka')
compile('org.springframework.boot:spring-boot-starter-log4j2')
compile('org.springframework.boot:spring-boot-starter-actuator')
compile('org.springframework.cloud:spring-cloud-config-monitor')
compile('org.apache.logging.log4j:log4j-1.2-api:'+ log4jAPIVersion)
compile('org.xerial.snappy:snappy-java:' + snappyVersion)
testCompile('org.springframework.boot:spring-boot-starter-test')
testCompile group: 'junit', name: 'junit', version: '4.11'
}
configurations {
all*.exclude module: 'spring-boot-starter-logging'
all*.exclude module: 'logback-classic'
all*.exclude module: 'log4j-over-slf4j'
all*.exclude module: 'snappy-java'
}
sourceSets {
main {
resources.srcDirs = ['src/main/resources', 'src/main/java']
resources.includes = ['**/*.xml', '**/*.yml']
}
}
jar {
baseName = 'configserver-bootcwenao'
}
因爲引入了spring-cloud-starter-bus-kafka需要排除掉這個組件自帶 logback,然後又需要兼容本身的log,所以還需要引入org.apache.logging.log4j:log4j-1.2-api
排除logging
configurations {
all*.exclude module: 'spring-boot-starter-logging'
all*.exclude module: 'logback-classic'
all*.exclude module: 'log4j-over-slf4j'
all*.exclude module: 'snappy-java'
}
在application.yml中配置Git
spring:
cloud:
config:
server:
git:
uri: https://git.oschina.net/youraccount/project/
search-paths: dir
username: xxxxxxxx@xx.com
password: xxxxxx
default-label: master
在application.yml中配置Kafka
spring:
cloud:
stream:
kafka:
binder:
brokers: localhost:9092
zk-nodes: localhost:2181
通過 @EnableConfigServer 啓用配置服務
/**
* @author cwenao
* @version $Id ConfigserverBootcwenaoApplication.java, v 0.1 2017-01-12 14:21 cwenao Exp $$
*/
@EnableDiscoveryClient
@SpringBootApplication
@EnableAutoConfiguration
@EnableConfigServer
public class ConfigserverBootcwenaoApplication {
public static void main(String[] args) {
new SpringApplicationBuilder(ConfigserverBootcwenaoApplication.class).web(true).run(args);
}
}
創建Config-Client服務
在build.gradle引入:cloud:spring-cloud-starter-config,同時引入 spring-cloud-starter-bus-kafka
apply plugin: 'org.springframework.boot'
dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:"+ springCloudVersion
mavenBom "org.springframework.boot:spring-boot-dependencies:"+ springBootVersion
mavenBom "org.springframework.boot:spring-boot-starter:"+ springBootVersion
}
}
dependencies {
compile('org.springframework.cloud:spring-cloud-starter-config')
compile('org.springframework.cloud:spring-cloud-starter-eureka')
compile('org.springframework.cloud:spring-cloud-netflix-sidecar')
compile('org.springframework.cloud:spring-cloud-starter-bus-kafka')
compile('org.springframework.cloud:spring-cloud-stream')
compile('org.xerial.snappy:snappy-java:' + snappyVersion)
compile ('org.springframework.boot:spring-boot-starter-web')
compile('org.springframework.boot:spring-boot-starter-log4j2')
compile('org.apache.logging.log4j:log4j-1.2-api:'+ log4jAPIVersion)
testCompile('org.springframework.boot:spring-boot-starter-test')
testCompile group: 'junit', name: 'junit', version: '4.11'
}
configurations {
all*.exclude module: 'spring-boot-starter-logging'
all*.exclude module: 'logback-classic'
all*.exclude module: 'log4j-over-slf4j'
all*.exclude module: 'snappy-java'
}
sourceSets {
main {
resources.srcDirs = ['src/main/resources', 'src/main/java']
resources.includes = ['**/*.xml', '**/*.yml']
}
}
jar {
baseName = 'apigateway-bootcwenao'
}
配置 bootstarp.yml 中 discovery開啓訪問配置服務中心
server:
port: 10002
sidecar:
port: 20001
#configServer
spring:
application:
name: apigateway
profiles:
active: dev
cloud:
config:
uri: http://localhost:8888/
discovery:
enabled: true
stream:
kafka:
binder:
brokers: localhost:9092
zk-nodes: localhost:2181
註解 @EnableDiscoveryClient
@SpringCloudApplication
@EnableDiscoveryClient
@EnableSidecar
public class ApiGatewayBootcwenaoApplication {
public static void main(String[] args) {
SpringApplication.run(ApiGatewayBootcwenaoApplication.class, args);
}
}
Git 中文件名字 apigateway-dev.yml
內容爲原先在本地的配置
啓動順序
服務註冊中心 –> 配置中心 –> 其他服務
可以看到配置中心服務於想依賴的服務都已經啓動註冊成功
手動調用刷新
- 修改任意的配置文件
- 在postman中調用 /bus/refresh ,post方式調用
自動更新配置/webhook
webhook配置
- 在application.yml中加入encrypt.key
- 此key與github上的Secret,gitoschina上的密碼對應
- webhook url: http://cwenao.eicp.net/configserver/bus/refresh
application.yml
encrypt:
key: cwenao
git倉庫 webhook配置
可能的錯誤
- zookeeper沒有讀取到
- kafka沒啓動
- log4j2與其他衝突
- git uri地址錯誤,需要最後加“/”
代碼
代碼請移步 Github參考地址
如有疑問請加公衆號(K171),如果覺得對您有幫助請 github start