Elastic Application Performance Management(APM) 是基于 Elastic Stack 构建的应用性能监控系统

背景

目前我们日志系统已经投入生产使用, 对于日常开发有了一个方便排查问题的途径
但是, 有些难题不是浮于表面的, 下一步需要做的, 便是找出这些埋于底层的性能及效率的问题.
这便是Application Performance Management(APM)出现的目的

目标

  • 收集有关请求的响应时间,数据库查询
  • 外部 HTTP 请求等的详细性能信息
  • 对应用程序的请求期间发生的其他缓慢操作的跟踪
  • 自动收集未处理的错误和异常，错误主要基于堆栈跟踪进行分组，因此可以识别出现的新错误，并密切关注特定错误发生的次数。

价值

依靠apm, 过滤出不合格的接口, 根据具体情况加以改进, 最终实现一个可以满足三高的理想状态
我们可以对接口的所有信息进行追溯, 现在我们已经有了trace-id, 可以反向拿"不合格的接口"的trace-id去找日志里找原因

APM server

APM Server 是用 Go 编写的开源应用程序，通常运行在专用服务器上，默认监听端口 8200 ，并通过 JSON HTTP API 从 agent 接收数据，然后根据该数据创建文档并将其存储在 Elasticsearch 中。

APM server的安装

  • docker-compose
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version: '3'
services:
  apm-server:
    image: docker.elastic.co/apm/apm-server:7.14.0
    container_name: apm-server
    depends_on:
      - elasticsearch
      - kibana
    ports:
      - 8200:8200
    volumes:
      - /opt/elk/ssl/certs/apm:/usr/share/apm-server/certs
      - /etc/apm-server/data:/usr/share/apm-server/data
      - /var/log/apm-server:/usr/share/apm-server/logs
      - /etc/apm-server/apm-server.yml:/usr/share/apm-server/apm-server.yml
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apm-server.host: "0.0.0.0:8200"
apm-server.rum.enabled: true
output.elasticsearch.hosts: ["10.0.2.15:9200"]
output.elasticsearch.username: "elastic"
output.elasticsearch.password: "xiaowu"
output.elasticsearch.protocol: https
output.elasticsearch.ssl.key: "/usr/share/apm-server/certs/es-node1.key"
output.elasticsearch.ssl.certificate: "/usr/share/apm-server/certs/es-node1.crt"
output.elasticsearch.ssl.certificate_authorities: "/usr/share/apm-server/certs/ca.crt"
apm-server.kibana.enabled: true
apm-server.kibana.host: "10.0.2.15:5601"
apm-server.kibana.username: "elastic"
apm-server.kibana.password: "xiaowu"
apm-server.kibana.protocol: https
apm-server.kibana.ssl.enabled: true
apm-server.kibana.ssl.certificate_authorities: ["/usr/share/apm-server/certs/ca.crt"]

APM agent

APM agent 是使用与服务相同的语言编写的开源库，可以像安装其他库一样将它们安装到服务中，agent 将检测服务的代码并在运行时收集性能数据和错误，这些数据缓冲一小段时间并发送到 APM server。

Nodejs代码样例

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# 更多配置参数详解参考 https://www.elastic.co/guide/en/apm/agent/nodejs/current/configuration.html
const elastic = require('elastic-apm-node');

module.exports = class Apm {
    constructor(opts) {
        this.opts = opts
    }
    start(){
        const self = this
        elastic.start({
            active: process.env.NODE_ENV !== 'local',
            environment: process.env.NODE_ENV || 'development',
            // 开发环境调试留用
            logLevel: self.opts.logLevel || "off",
            usePathAsTransactionName: true,
            serviceName: self.opts.appName,
            // 开发环境调试留用
            serverUrl: self.opts.serverUrl || 'http://xxx:8200',
        })
    }
}


new Apm({
  appName: sysCfg.name,
  serverUrl: "http://192.168.56.103:8200"
}).start()
  • 可以统计接口的详细信息
  • 抓取的全部指标数据
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{
	  "agent" : {
		"name" : "nodejs",
		"version" : "3.20.0"
	  },
	  "process" : {
		"args" : [
		  """D:\Program Files\nodejs\node.exe""",
		  """D:\project\node-project\test\bin\run"""
		],
		"pid" : 3776,
		"title" : "npm",
		"ppid" : 9500
	  },
	  "source" : {
		"ip" : "127.0.0.1"
	  },
	  "processor" : {
		"name" : "transaction",
		"event" : "transaction"
	  },
	  "url" : {
		"path" : "/xiaowu/400",
		"original" : "/xiaowu/400",
		"scheme" : "http",
		"port" : 23000,
		"domain" : "localhost",
		"full" : "http://localhost:23000/xiaowu/400"
	  },
	  "observer" : {
		"hostname" : "6f216d8db8c6",
		"id" : "2c6a2ceb-ee23-4622-b8b7-8df5c44d0075",
		"type" : "apm-server",
		"ephemeral_id" : "a9e8ecc2-802e-48b3-98dd-3854ed6b18c9",
		"version" : "7.14.0",
		"version_major" : 7
	  },
	  "trace" : {
		"id" : "b37ea440f81892107c8a665d1681f874"
	  },
	  "@timestamp" : "2021-08-27T09:13:04.762Z",
	  "ecs" : {
		"version" : "1.10.0"
	  },
	  "service" : {
		"node" : {
		  "name" : "DESKTOP-6RD9D8B"
		},
		"environment" : "development",
		"name" : "sapi_carmodel",
		"runtime" : {
		  "name" : "node",
		  "version" : "12.22.1"
		},
		"language" : {
		  "name" : "javascript"
		},
		"version" : "0.2.0"
	  },
	  "host" : {
		"hostname" : "DESKTOP-6RD9D8B",
		"os" : {
		  "platform" : "win32"
		},
		"ip" : "192.168.56.1",
		"name" : "DESKTOP-6RD9D8B",
		"architecture" : "x64"
	  },
	  "http" : {
		"request" : {
		  "headers" : {
			"Connection" : [
			  "keep-alive"
			],
			"User-Agent" : [
			  "Apache-HttpClient/4.5.10 (Java/11)"
			],
			"Host" : [
			  "localhost:23000"
			]
		  },
		  "method" : "GET",
		  "socket" : {
			"encrypted" : false,
			"remote_address" : "127.0.0.1"
		  }
		},
		"response" : {
		  "headers" : {
			"Keep-Alive" : [
			  "timeout=5"
			],
			"Trace-Id" : [
			  "-"
			],
			"Connection" : [
			  "keep-alive"
			],
			"Content-Length" : [
			  "9"
			],
			"Date" : [
			  "Fri, 27 Aug 2021 09:13:04 GMT"
			],
			"Content-Type" : [
			  "text/plain; charset=utf-8"
			]
		  },
		  "status_code" : 404
		},
		"version" : "1.1"
	  },
	  "client" : {
		"ip" : "127.0.0.1"
	  },
	  "event" : {
		"ingested" : "2021-08-27T09:13:06.567410455Z",
		"outcome" : "success"
	  },
	  "transaction" : {
		"duration" : {
		  "us" : 3448
		},
		"result" : "HTTP 4xx",
		"name" : "GET /xiaowu/400",
		"span_count" : {
		  "started" : 0
		},
		"id" : "84271adf07e76a62",
		"type" : "request",
		"sampled" : true
	  },
	  "user_agent" : {
		"original" : "Apache-HttpClient/4.5.10 (Java/11)",
		"name" : "Apache-HttpClient",
		"device" : {
		  "name" : "Other"
		},
		"version" : "4.5.10"
	  },
	  "timestamp" : {
		"us" : 1630055584762002
	  }
	}