如何为停靠的Akka应用程序配置Kamon？

Question

我用Akka创建了一个示例服务，用于测试Kamon + DataDog监控。

下面是我添加的依赖项：

"io.kamon" %% "kamon-core" % "1.1.0",
"io.kamon" %% "kamon-datadog" % "1.0.0",
"io.kamon" %% "kamon-akka-2.5" % "1.0.1"

以下是在build.sbt中启用的插件

.enablePlugins(AshScriptPlugin, DockerPlugin, SbtAspectJRunner)

然后是application.conf

kamon {
  datadog {
    time-units = "ms"
    memory-units = "b"
  }
  util {
    filters {
      "akka.tracked-actor" {
        includes = [ "testSystem/user/**" ]
        excludes = [ "testSystem/system/**" ]
      }

      "s3-worker-actors" {
        includes = [ "testSystem/user/s3Router/*" ]
      }

      "fb-worker-actors" {
        includes = [ "testSystem/user/fbRouter/*" ]
      }

      "akka.tracked-router" {
        includes = [ "testSystem/user/s3Router", "testSystem/user/fbRouter" ]
      }

      "akka.tracked-dispatcher" {
        includes = [ "**" ]
      }

      "akka.traced-actor" {
        includes = [ "**" ]
      }
    }
  }
  akka.actor-groups = [ "s3-worker-actors", "fb-worker-actors" ]
}

最后，在我调用的Main类中：

Kamon.addReporter(new DatadogAgentReporter())

在EC2上，我为docker安装了datadog-agent。

当我在EC2实例上运行服务容器，然后查看DataDog接口时，我没有看到任何与akka相关的指标，只看到了一系列标准指标，比如：datadog.process.agent、docker.cpu.usage、system.io.await等

当一个akka应用打包到docker中并部署到EC2上时，如何开启akka相关指标？

Answer 1

当你开始你的Akka应用程序时，有必要使用add AspectJ weaver as Java Agent：-javaagent:aspectjweaver.jar

您可以在项目SBT配置中添加以下设置：

.settings(
  retrieveManaged := true,
  libraryDependencies += "org.aspectj" % "aspectjweaver" % aspectJWeaverV)

因此，AspectJ weaver JAR将被复制到项目根目录下的./lib_managed/jars/org.aspectj/aspectjweaver/aspectjweaver-[aspectJWeaverV].jar中。

然后你可以在你的Dockerfile中引用这个JAR：

COPY ./lib_managed/jars/org.aspectj/aspectjweaver/aspectjweaver-*.jar /app- 
workdir/aspectjweaver.jar
WORKDIR /app-workdir
CMD ["java", "-javaagent:aspectjweaver.jar", "-jar", "app.jar"]