此係列文章將會描述Java框架Spring Boot、服務治理框架Dubbo、應用容器引擎Docker,及使用Spring Boot集成Dubbo、Mybatis等開源框架,其中穿插着Spring Boot中日誌切面等技術的實現,然後通過gitlab-CI以持續集成爲Docker鏡像。
本文爲Prometheus 監控埋點
本系列文章中所使用的框架版本爲Spring Boot 2.0.3-RELEASE,Spring 5.0.7-RELEASE,Dubbo 2.6.2。
Prometheus + Grafana
SpringBoot2.x上已引入第三方實現的metrics Facade
,默認與micrometer
集成,而micrometer
具有Prometheus
的MeterRegistry
規範的實現。
Prometheus
通過Micrometer
拉取及處理SpringBoot
應用中的監控數據,最後通過Grafana
提供的UI界面進行數據的實時展示。
快速集成
Parent POM
版本1.1.2+
後支持
<parent>
<groupId>com.linghit</groupId>
<artifactId>dubbo.common.pom</artifactId>
<version>1.1.2</version>
</parent>
Maven依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-undertow</artifactId>
<version>${springboot.version}</version>
</dependency>
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-registry-prometheus</artifactId>
<version>${micrometer.version}</version>
</dependency>
application配置
需開啓
server.port
及management.port
;若未定義management.port
則會默認使用server.port
# dubbo endpoints
management.endpoint.dubbo.enabled = true
management.endpoint.dubbo-configs.enabled = true
management.endpoint.dubbo-properties.enabled = true
management.health.dubbo.status.defaults = memory
management.health.dubbo.status.extras = load,threadpool
# metrics
management.metrics.export.prometheus.enabled = true
management.metrics.export.prometheus.step = 1m
management.metrics.export.prometheus.descriptions = true
management.web.server.auto-time-requests = true
management.endpoints.web.exposure.include = env,health,info,metrics,threaddump,prometheus,dubbo,dubbo-configs,dubbo-properties
Web埋點
Spring boot支持Web及JMX(Java管理拓展)的健康指標監控,JMX的方式不適合於可視化監控。現有使用Prometheus拉取監控數據,並以Grafana進行數據可視化展示的方案更優
此處Spring Boot Actuator
通過REST API
提供對應用系統的自省和監控的集成功能
依賴
spring boot
及dubbo
的actuator
起步依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-undertow</artifactId>
<version>${springboot.version}</version>
</dependency>
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-registry-prometheus</artifactId>
<version>${micrometer.version}</version>
</dependency>
application配置
management.metrics.export.prometheus.enabled=true
management.metrics.export.prometheus.step=1m
management.metrics.export.prometheus.descriptions=true
management.web.server.auto-time-requests=true
management.endpoints.web.exposure.include=health,info,env,prometheus,metrics,httptrace,threaddump,heapdump
web容器
undertow的servlet容器
@SpringBootApplication
@EnableAspectJAutoProxy(proxyTargetClass = true)
@ComponentScan("com.linghit")
public class Starter {
public static void main(String[] args) {
new SpringApplicationBuilder(Starter.class)
.web(WebApplicationType.SERVLET).run(args);
}
}
Log4j2 Metrics
Spring Boot 2.1.0.RELEASE
纔開始支持Log4j2 metrics
的自動裝配,低版本只支持Logback metrics
,欲使用需升級版本或自實現
Dubbo埋點
dubbo-spring-boot-actuator
提供生產就緒(Production-Ready
)特性 (比如健康檢查,OPS端點,及外部化配置)
依賴
<dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-actuator</artifactId>
<version>${dubbo.springboot.version}</version>
</dependency>
application配置
# dubbo endpoints
management.endpoint.dubbo.enabled = true
management.endpoint.dubbo-configs.enabled = true
management.endpoint.dubbo-properties.enabled = true
management.health.dubbo.status.defaults = memory
management.health.dubbo.status.extras = load,threadpool
注:需在
management.endpoints.web.exposure.include
添加對應的endpoints
,如:dubbo,dubbo-configs,dubbo-properties
Docker埋點
要將Docker守護程序配置爲Prometheus目標,您需要指定 metrics-address
。最好的方法是通過daemon.json
,默認情況下位於以下位置之一。(如果該文件不存在,請創建它)
- Linux:/etc/docker/daemon.json
- Windows Server:C:\ProgramData\docker\config\daemon.json
- Docker Desktop for Mac / Docker Desktop for Windows:單擊工具欄中的Docker->Preferences->Daemon->高級
如果文件當前爲空,請粘貼以下內容:
{
"metrics-addr" : "127.0.0.1:9323",
"experimental" : true
}