flink指标对接prometheus和grafana

先上一个架构图

Flink App ： 通过report 将数据发出去

Pushgateway : Prometheus 生态中一个重要工具

Prometheus : 一套开源的系统监控报警框架 （Prometheus 入门与实践）

Grafana： 一个跨平台的开源的度量分析和可视化工具，可以通过将采集的数据查询然后可视化的展示，并及时通知（可视化工具Grafana：简介及安装）

Node_exporter : 跟Pushgateway一样是Prometheus 的组件，采集到主机的运行指标如CPU, 内存，磁盘等信息

prometheus搭建

参考 prometheus安装教程

grafana搭建

参考 grafana安装教程

Pushgateway 安装

pushgateway-deployment.yaml

apiVersion: apps/v1beta2
kind: Deployment
metadata:
  namespace: prometheus
  name:  pushgateway-ttt
  labels:
    app:  pushgateway-ttt
  annotations:
    prometheus.io/scrape: "true"
    prometheus.io/port: "8080"
spec:
  replicas: 1
  revisionHistoryLimit: 0
  selector:
    matchLabels:
      app:  pushgateway-ttt
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: "25%"
      maxUnavailable: "25%"
  template:
    metadata:
      name:  pushgateway-ttt
      labels:
        app:  pushgateway-ttt
    spec:
      containers:
        - name:  pushgateway-ttt
          image: prom/pushgateway:v0.7.0
          imagePullPolicy: IfNotPresent
          livenessProbe:
            initialDelaySeconds: 600
            periodSeconds: 10
            successThreshold: 1
            failureThreshold: 10
            httpGet:
              path: /
              port: 9091
          ports:
            - name: "app-port"
              containerPort: 9091

pushgateway-svc.yaml

apiVersion: v1
kind: Service
metadata:
  name: pushgateway-ttt
  namespace: prometheus
  labels:
    app: pushgateway-ttt
spec:
  selector:
    app: pushgateway-ttt
  type: NodePort
  ports:
    - name: pushgateway-ttt
      port: 9091
      targetPort: 9091
      nodePort: 30002

通过任意机器IP：30002 可以访问ui

配置Flink report ：

在Flink 配置文件 flink-conf.yml 中添加如下内容：

metrics.reporter.promgateway.class: org.apache.flink.metrics.prometheus.PrometheusPushGatewayReporter
metrics.reporter.promgateway.host: pushgateway配置的ip或者域名
metrics.reporter.promgateway.port: 9091
metrics.reporter.promgateway.jobName: myJob
metrics.reporter.promgateway.randomJobNameSuffix: true
metrics.reporter.promgateway.deleteOnShutdown: false

jobName配置成对应的名称，不然会被覆盖

Grafana 中配置Flink监控

由于上面一句配置好Flink report、 pushgateway、prometheus，并且在Grafana中已经添加了prometheus 数据源，所以Grafana中会自动获取到 flink job的metrics 。

Grafana 首页，点击New dashboard，创建一个新的dashboard

选中之后，即会出现对应的监控指标

至此，Flink 的metrics 的指标展示在Grafana 中了

flink 指标对应的指标名比较长，可以在Legend 中配置显示内容，在 将key换成对应需要展示的字段即可，如： ,

对应显示如下：

优化

仪表盘的配置

仪表盘的配置可以到官网找别人配好的现成的

Dashboards
下载json文件然后导入即可。

原生指标太多

当TM太多的时候，仪表盘会太多信息。

例如TaskManagers Garbage Collection Time 的统计，只需要TOP10就好

原先语句

delta(flink_taskmanager_Status_JVM_GarbageCollector_G1_Young_Generation_Time[30s])

改为

topk(10,delta(flink_taskmanager_Status_JVM_GarbageCollector_G1_Young_Generation_Time[30s]))

统计每个算子每个TM的吞吐，这种维度太细，其实只要知道每种算子的吞吐即可

sum (flink_taskmanager_job_task_operator_numRecordsInPerSecond{job_name=~"$job_name"})  by (operator_name)

关于配置，学习一下PromQL

https://www.jianshu.com/p/f77047fd8dca

关于Pushgateway单点瓶颈

在架构部分我们简单介绍过，通过Pushgateway组件，我们可以通过Pushgatway作为中间代理，实现跨网络环境的数据采集，通过一些周期性的任务定时向Pushgateway上报数据，Prometheus依然通过Pull模式定时获取数据。

在官方文档中介绍了三种使用Pushgateway的问题：

• 当采用Pushgateway获取监控数据时，Pushway即会成为单点以及潜在的性能瓶颈
• 丧失了Prometheus的实例健康检查功能
• 除非手动删除Pushgateway的数据，否则Pushgateway会一直保留所有采集到的数据并且提供给Prometheus。

目前我这边想到的方法是pushgateway是部署在kubernetes上，直接通过扩展副本数量来增加实例数，通过kubernetes的service来做负载均衡。

缺点就是pushgateway的ui就没办法指定查看某个节点的UI。

可以通过在master上curl特定节点来获取整个html查看。

kubectl get pods -n prometheus -o wide

prometheus-6bb658bb79-wpsd5       1/1     Running   0          24h   10.44.0.3         node1   <none>           <none>
pushgateway-ttt-6b6755dd8-2vtnz   1/1     Running   0          83m   10.44.0.5         node1   <none>           <none>
pushgateway-ttt-6b6755dd8-fd6mq   1/1     Running   0          19h   10.44.0.4         node1   <none>           <none>

curl -k '10.44.0.4:9091'

样例

grafana

{
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": "-- Grafana --",
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "description": "flink with prometheus",
  "editable": true,
  "gnetId": 11049,
  "graphTooltip": 0,
  "id": 2,
  "iteration": 1587904582481,
  "links": [],
  "panels": [
    {
      "collapsed": false,
      "datasource": null,
      "gridPos": {
        "h": 1,
        "w": 24,
        "x": 0,
        "y": 0
      },
      "id": 16,
      "panels": [],
      "title": "Slots",
      "type": "row"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(255, 255, 255, 0.89)",
        "rgba(50, 172, 45, 0.97)"
      ],
      "datasource": "$datasource",
      "format": "none",
      "gauge": {
        "maxValue": null,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 6,
        "w": 4,
        "x": 0,
        "y": 1
      },
      "hideTimeOverride": false,
      "id": 7,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "options": {},
      "pluginVersion": "6.5.3",
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
        {
          "from": "null",
          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
        "fillColor": "rgba(251, 129, 76, 0.18)",
        "full": false,
        "lineColor": "rgb(193, 31, 31)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "sum(flink_jobmanager_numRegisteredTaskManagers)",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 2,
          "legendFormat": "{{instance}}",
          "metric": "flink_jobmanager_numRegisteredTaskManagers",
          "refId": "A",
          "step": 20
        }
      ],
      "thresholds": "",
      "timeFrom": null,
      "timeShift": null,
      "title": "# of TaskManagers",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
        }
      ],
      "valueName": "current"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(255, 255, 255, 0.89)",
        "rgba(50, 172, 45, 0.97)"
      ],
      "datasource": "$datasource",
      "format": "none",
      "gauge": {
        "maxValue": null,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 6,
        "w": 4,
        "x": 4,
        "y": 1
      },
      "hideTimeOverride": false,
      "id": 3,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "options": {},
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
        {
          "from": "null",
          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
        "fillColor": "rgba(31, 118, 189, 0.18)",
        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "sum(flink_jobmanager_taskSlotsAvailable)",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 2,
          "legendFormat": "",
          "metric": "flink_jobmanager_taskSlotsAvailable",
          "refId": "A",
          "step": 20
        }
      ],
      "thresholds": "",
      "title": "Taskslots available",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
        }
      ],
      "valueName": "current"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(255, 255, 255, 0.89)",
        "rgba(50, 172, 45, 0.97)"
      ],
      "datasource": "$datasource",
      "format": "none",
      "gauge": {
        "maxValue": null,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 6,
        "w": 4,
        "x": 8,
        "y": 1
      },
      "hideTimeOverride": false,
      "id": 4,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "options": {},
      "pluginVersion": "6.5.3",
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
        {
          "from": "null",
          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
        "fillColor": "rgba(31, 118, 189, 0.18)",
        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "sum(flink_jobmanager_taskSlotsTotal)",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 2,
          "legendFormat": "",
          "metric": "flink_jobmanager_taskSlotsTotal",
          "refId": "A",
          "step": 20
        }
      ],
      "thresholds": "",
      "timeFrom": null,
      "timeShift": null,
      "title": "Taskslots total",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
        }
      ],
      "valueName": "current"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(255, 255, 255, 0.89)",
        "rgba(50, 172, 45, 0.97)"
      ],
      "datasource": "$datasource",
      "format": "none",
      "gauge": {
        "maxValue": null,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 6,
        "w": 4,
        "x": 12,
        "y": 1
      },
      "hideTimeOverride": false,
      "id": 8,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "options": {},
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
        {
          "from": "null",
          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
        "fillColor": "rgba(251, 129, 76, 0.18)",
        "full": false,
        "lineColor": "rgb(193, 31, 31)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "sum(flink_jobmanager_numRunningJobs)",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 2,
          "legendFormat": "{{instance}} jobmanager运行的job数量",
          "metric": "flink_jobmanager_numRunningJobs",
          "refId": "A",
          "step": 20
        }
      ],
      "thresholds": "",
      "title": "# of Running Jobs",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
        }
      ],
      "valueName": "current"
    },
    {
      "aliasColors": {},
      "bars": false,
      "cacheTimeout": null,
      "dashLength": 10,
      "dashes": false,
      "datasource": "$datasource",
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 6,
        "w": 8,
        "x": 16,
        "y": 1
      },
      "hiddenSeries": false,
      "id": 65,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "options": {
        "dataLinks": []
      },
      "percentage": false,
      "pluginVersion": "6.5.3",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "flink_jobmanager_job_fullRestarts{reportName=~\"$reportName\"}\r",
          "intervalFactor": 2,
          "legendFormat": "{{job_name}}",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "job restart count ",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "collapsed": false,
      "datasource": null,
      "gridPos": {
        "h": 1,
        "w": 24,
        "x": 0,
        "y": 7
      },
      "id": 58,
      "panels": [],
      "title": "BackPressure",
      "type": "row"
    },
    {
      "aliasColors": {},
      "bars": false,
      "cacheTimeout": null,
      "dashLength": 10,
      "dashes": false,
      "datasource": "$datasource",
      "description": "numRecordsOutPerSecond",
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 9,
        "w": 24,
        "x": 0,
        "y": 8
      },
      "hiddenSeries": false,
      "id": 59,
      "legend": {
        "alignAsTable": true,
        "avg": false,
        "current": true,
        "hideEmpty": false,
        "hideZero": false,
        "max": true,
        "min": false,
        "rightSide": true,
        "show": true,
        "sideWidth": null,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "connected",
      "options": {
        "dataLinks": []
      },
      "percentage": false,
      "pluginVersion": "6.2.4",
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "sum (flink_taskmanager_job_task_operator_numRecordsOutPerSecond{reportName=~\"$reportName\"})  by (operator_name) ",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 2,
          "legendFormat": "{{operator_name}}",
          "metric": "flink_jobmanager_Status_JVM_Memory_Direct_MemoryUsed",
          "refId": "B",
          "step": 20
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "Task Out TPS",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "cumulative"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "cps",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "decbytes",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "cacheTimeout": null,
      "dashLength": 10,
      "dashes": false,
      "datasource": "$datasource",
      "description": "numRecordsInPerSecond",
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 8,
        "w": 24,
        "x": 0,
        "y": 17
      },
      "hiddenSeries": false,
      "id": 61,
      "legend": {
        "alignAsTable": true,
        "avg": false,
        "current": true,
        "max": true,
        "min": false,
        "rightSide": true,
        "show": true,
        "sideWidth": null,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "connected",
      "options": {
        "dataLinks": []
      },
      "percentage": false,
      "pluginVersion": "6.2.4",
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "sum (flink_taskmanager_job_task_operator_numRecordsInPerSecond{reportName=~\"$reportName\"})  by (operator_name) ",
          "format": "time_series",
          "hide": false,
          "instant": false,
          "intervalFactor": 2,
          "legendFormat": "{{operator_name}}",
          "metric": "flink_jobmanager_Status_JVM_Memory_Direct_MemoryUsed",
          "refId": "B",
          "step": 20
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "Task In TPS",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "cumulative"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "cps",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "bytes",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": false
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "$datasource",
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 7,
        "w": 24,
        "x": 0,
        "y": 25
      },
      "hiddenSeries": false,
      "id": 69,
      "legend": {
        "alignAsTable": true,
        "avg": false,
        "current": true,
        "max": true,
        "min": false,
        "rightSide": true,
        "show": true,
        "sideWidth": null,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "nullPointMode": "null",
      "options": {
        "dataLinks": []
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Reference

https://www.cnblogs.com/Springmoon-venn/p/11445023.html

https://segmentfault.com/a/1190000017833186?utm_source=tag-newest