what-kamon

什么是Kamon

一个jvm 监控工具, 通过简单的注解可以非常容易的将需要监控的信息，进行上报

比如通过将Kamon 信息上传到StatsD, 然后StatsD 周期性的将信息上传到grafana 面板

主要注解

@EnableKamon

@Segment

@Trace

配置文件

默认读取application.conf 文件

application.conf 内容类似如下

## ---------------------------------------------------------------------------
## Licensed to the Apache Software Foundation (ASF) under one or more
## contributor license agreements.  See the NOTICE file distributed with
## this work for additional information regarding copyright ownership.
## The ASF licenses this file to You under the Apache License, Version 2.0
## (the "License"); you may not use this file except in compliance with
## the License.  You may obtain a copy of the License at
##
##      http://www.apache.org/licenses/LICENSE-2.0
##
## Unless required by applicable law or agreed to in writing, software
## distributed under the License is distributed on an "AS IS" BASIS,
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
## See the License for the specific language governing permissions and
## limitations under the License.
## ---------------------------------------------------------------------------

## To fix the issue that Spring Boot 2.1 disable the bean definition override by default
spring.main.allow-bean-definition-overriding=true

###############################
# Kamon related configuration #
###############################

kamon {

  metric {
    filters {
      trace.includes = ["**"]
      trace-segment.includes = ["**"]
      trace-segment.excludes = []
      akka-actor.includes = []
      akka-actor.excludes = ["**"]
      akka-dispatcher.includes = []
      akka-dispatcher.excludes = ["**"]
    }
  }

  show-aspectj-missing-warning = no

  modules {
    kamon-annotation {
      auto-start = no
      requires-aspectj = yes
    }

    kamon-log-reporter {
      auto-start = no
      requires-aspectj = no
    }

    kamon-statsd {
      auto-start = no
      requires-aspectj = no
    }
  }

  statsd {
    # Hostname and port in which your StatsD is running. Remember that StatsD packets are sent using UDP and
    # setting unreachable hosts and/or not open ports wont be warned by the Kamon, your data wont go anywhere.
    hostname = "localhost"
    port = 8125

    # Interval between metrics data flushes to StatsD. It's value must be equal or greater than the
    # kamon.metrics.tick-interval setting.
    flush-interval = 10 second

    # Subscription patterns used to select which metrics will be pushed to StatsD. Note that first, metrics
    # collection for your desired entities must be activated under the kamon.metrics.filters settings.
    includes {
      actor = []
      trace = ["*"]
      trace-segment = ["*"]
      dispatcher = []
    }

    subscriptions {
      histogram = ["**"]
      min-max-counter = ["**"]
      gauge = ["**"]
      counter = ["**"]
      trace = ["**"]
      trace-segment = ["**"]
      akka-actor = []
      akka-dispatcher = []
      akka-router = []
      system-metric = ["**"]
      http-server = []
    }
  }
}

后通过javaagent 加载aspectjweaver 将监控信息写入StatsD

待续

目前还没有成功

在fastjar 情况下，不能找到aspectj 的一个类，导致没有办法kamon start

– cmonkey 2019年3月28日16:58:12