• Grafana + Prometheus 监控PostgreSQL


     效果图

    部署环境

    服务器名称 IP地址 监控指标 部署agent 备注
    sht-sgmhadoopcm-01 172.16.101.54

    OS

    node_exporter 监控服务器、被监控服务器
    sht-sgmhadoopnn-01 172.16.101.55

    OS

    node_exporter  被监控服务器
    sht-sgmhadoopnn-02 172.16.101.56 OS node_exporter  被监控服务器
    sht-sgmhadoopdn-01 172.16.101.58 OS node_exporter  被监控服务器
    sht-sgmhadoopdn-02 172.16.101.59 OS node_exporter  被监控服务器
    sht-sgmhadoopdn-03 172.16.101.60

    OS

    PostgreSQL

    node_exporter

    postgres_exporter

     被监控服务器
    sht-sgmhadoopdn-04 172.16.101.66

    OS

    PostgreSQL

    node_exporter

    postgres_exporter

     被监控服务器

    安装目录

    grafana   /usr/local/grafana

    prometheus /usr/local/prometheus

    node_exporter /usr/local/prometheus/plugin

    postgres_exporter /usr/local/prometheus/plugin/postgres_exporter

    软件准备

    • grafana

              https://dl.grafana.com/oss/release/grafana-6.0.1.linux-amd64.tar.gz 

    • Prometheus

              https://github.com/prometheus/prometheus/releases/download/v2.8.0/prometheus-2.8.0.linux-amd64.tar.gz

    • Prometheus agent

      node_exporter

              https://github.com/prometheus/node_exporter/releases/download/v0.17.0/node_exporter-0.17.0.linux-amd64.tar.gz

              postgres_exporter

              https://github.com/wrouesnel/postgres_exporter

              https://github.com/wrouesnel/postgres_exporter/releases

    一 安装步骤

    1.监控服务器安装Grafana

    # tar -zxf grafana-6.0.1.linux-amd64.tar.gz
    # mv grafana-6.0.1/* .
    # rm -rf grafana-6.0.1*

     修改conf/defaults.ini文件部分参数如下

    data = /usr/local/grafana/data
    logs = /usr/local/grafana/data/log
    plugins = /usr/local/grafana/data/plugins
    provisioning = /usr/local/grafana/conf/provisioning

    启动grafana

    # bin/grafana-server &

     登录查看

    默认账号密码admin/admin

    2.监控服务器安装prometheus

    --web.enable-lifecycle
    作用:后期修改参数文件时不需要重启服务,可以通过api重新读取参数文件。
    # tar -zxf prometheus-2.8.0.linux-amd64.tar.gz
    # mv prometheus-2.8.0.linux-amd64/* .
    # rm -rf prometheus-2.8.0.linux-amd64*
    # ./prometheus --web.enable-lifecycle --web.enable-admin-api &

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    3. 各节点安装agent

       node_exporter

    # tar -zxf node_exporter-0.17.0.linux-amd64.tar.gz
    # mv node_exporter-0.17.0.linux-amd64 node_exporter
    # rm -rf node_exporter-0.17.0.linux-amd64.tar.gz
    # node_exporter/node_exporter &

    postgres_exporter

    该插件还未集成prometheus官网,需要从github下载.,分别下载源码文件,注意postgres_exporter二进制执行文件并不在该源码包里,需要单独下载。

    源码 https://github.com/wrouesnel/postgres_exporter

    二进制执行文件https://github.com/wrouesnel/postgres_exporter/releases

    加入我自己定义的部分sql到custom.yaml文件

    # cp queries.yaml custom.yaml
    pg_stat_connetion:
      query: "select state,count(*) from pg_stat_activity group by state"
      metrics:
        - state:
            usage: "LABEL"
            description: "type of session state"
        - num:
            usage: "GAUGE"
            description: "type of session state"
    
    pg_stat_long:
       query: "SELECT pid, runtime from (select usename, pid, EXTRACT(EPOCH FROM (now() - query_start))::INT as runtime FROM pg_stat_activity) as ss where runtime > 180 order by runtime desc limit 5"
       metrics:
         - pid:
             usage: "LABEL"
             description: "Pid of the client"
         - runtime:
             usage: "GAUGE"
             description: "current transactrion start time"

     启动postgres_exporter

    # export DATA_SOURCE_NAME="postgresql://dbadmin:1qax2wse@172.16.101.54:5432/postgres?sslmode=disable"
    # export PG_EXPORTER_EXTEND_QUERY_PATH="/usr/local/prometheus/plugin/postgres_exporter/custom.yaml"
    # ./postgres_exporter &

     查看postgre_exporter

     4. prometheus添加agent节点

    prometheus.yml

    # my global config
    global:
      scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
      evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
      # scrape_timeout is set to the global default (10s).
    
    # Alertmanager configuration
    alerting:
      alertmanagers:
      - static_configs:
        - targets:
          # - alertmanager:9093
    
    # Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
    rule_files:
      # - "first_rules.yml"
      # - "second_rules.yml"
    
    # A scrape configuration containing exactly one endpoint to scrape:
    # Here it's Prometheus itself.
    scrape_configs:
      # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
     
    
    - job_name: 'promethus'
      static_configs:
         - targets: ['172.16.101.54:9090']
           labels:
            instance: 'sht-sgmhadoopcm-01'
            platform: 'sh'
    
    - job_name: 'system'
      static_configs:
         - targets: ['172.16.101.54:9100']
           labels:
            instance: 'sht-sgmhadoopcm-01'
            platform: 'ec2'
         - targets: ['172.16.101.55:9100']
           labels:
            instance: 'sht-sgmhadoopnn-01'
            platform: 'ec2'
         - targets: ['172.16.101.56:9100']
           labels:
            instance: 'sht-sgmhadoopnn-02'
            platform: 'ec2'
         - targets: ['172.16.101.58:9100']
           labels:
            instance: 'sht-sgmhadoopdn-01'
            platform: 'ec2'
         - targets: ['172.16.101.59:9100']
           labels:
            instance: 'sht-sgmhadoopdn-02'
            platform: 'ec2'
         - targets: ['172.16.101.60:9100']
           labels:
            instance: 'sht-sgmhadoopdn-03'
            platform: 'ec2'
         - targets: ['172.16.101.66:9100']
           labels:
            instance: 'sht-sgmhadoopdn-04'
            platform: 'ec2'
    
    - job_name: 'postgres'
      static_configs:
         - targets: ['172.16.101.66:9187']
           labels:
            instance: 'sht-sgmhadoopdn-04'
            platform: 'ec2'
         - targets: ['172.16.101.60:9187']
           labels:
            instance: 'sht-sgmhadoopdn-03'
            platform: 'ec2'
    View Code

     重新载入配置文件

    # curl -X POST http://172.16.101.54:9090/-/reload
    level=info ts=2019-03-16T15:18:16.149076153Z caller=main.go:724 msg="Loading configuration file" filename=prometheus.yml
    level=info ts=2019-03-16T15:18:16.152481657Z caller=main.go:751 msg="Completed loading of configuration file" filename=prometheus.yml

    登录prometheus验证

    二. 部署grafana

    1. 添加prometheus数据源

    2.建立dashboard

     dashbord名称

     

    添加变量,把改dashborad作为模板使用

    变量instance,获得server的node_exporter

    变量database,获得server的postgres_exporter

     3.添加查询

    系统监控

    添加row

    1)system start time

    2)CPU Cores

    3)Memory Size 

    4) CPU Usage (5m)

    5) CPU IO Wait (5m)

     

    6) Memory Used

     

    7) Memory Cached

     

    8)System Average Load (1,5,15) 

    9) DIsk Usage

    10) Disk Read/Write IOPS (1m)

     数据库监控

    添加row

     

     1) PostgreSQL Start Time

    2) PostgreSQL Version

     

    3) PostgreSQL Shared_buffers

     

    4) PostgreSQL Effective_cache_size

     

    5) PostgreSQL Work Memory

     

    6) PostgreSQL Max Connections

     

    7) Logging Collector

    8) PostgreSQL Fsync

     

    9) PostgreSQL Database Size

     

    10) PostgreSQL Current Sessions

     

    11) PostgreSQL Table Locks

     

    12) PostgreSQL Deadlocks

     

    13) PostgreSQL Longest Transactions

     

    14) Tuple Updated

    15) Tuple Deleted

     

    16) Tuple Inserted

     

    17) Cache Hit Rate

    18) Checkpoint Stats

     

    {
      "__inputs": [
        {
          "name": "DS_DEV_PROMETHEUS",
          "label": "DEV_Prometheus",
          "description": "",
          "type": "datasource",
          "pluginId": "prometheus",
          "pluginName": "Prometheus"
        }
      ],
      "__requires": [
        {
          "type": "panel",
          "id": "gauge",
          "name": "Gauge",
          "version": ""
        },
        {
          "type": "grafana",
          "id": "grafana",
          "name": "Grafana",
          "version": "6.0.1"
        },
        {
          "type": "panel",
          "id": "graph",
          "name": "Graph",
          "version": "5.0.0"
        },
        {
          "type": "datasource",
          "id": "prometheus",
          "name": "Prometheus",
          "version": "5.0.0"
        },
        {
          "type": "panel",
          "id": "singlestat",
          "name": "Singlestat",
          "version": "5.0.0"
        },
        {
          "type": "panel",
          "id": "table",
          "name": "Table",
          "version": "5.0.0"
        }
      ],
      "annotations": {
        "list": [
          {
            "builtIn": 1,
            "datasource": "-- Grafana --",
            "enable": true,
            "hide": true,
            "iconColor": "rgba(0, 211, 255, 1)",
            "name": "Annotations & Alerts",
            "type": "dashboard"
          }
        ]
      },
      "editable": true,
      "gnetId": null,
      "graphTooltip": 0,
      "id": null,
      "iteration": 1552826976555,
      "links": [],
      "panels": [
        {
          "collapsed": false,
          "gridPos": {
            "h": 1,
            "w": 24,
            "x": 0,
            "y": 0
          },
          "id": 21,
          "panels": [],
          "title": "==============================System Summary==============================",
          "type": "row"
        },
        {
          "cacheTimeout": null,
          "colorBackground": false,
          "colorValue": false,
          "colors": [
            "#299c46",
            "rgba(237, 129, 40, 0.89)",
            "#d44a3a"
          ],
          "datasource": "${DS_DEV_PROMETHEUS}",
          "format": "dateTimeAsIso",
          "gauge": {
            "maxValue": 100,
            "minValue": 0,
            "show": false,
            "thresholdLabels": false,
            "thresholdMarkers": true
          },
          "gridPos": {
            "h": 6,
            "w": 3,
            "x": 0,
            "y": 1
          },
          "id": 2,
          "interval": null,
          "links": [],
          "mappingType": 1,
          "mappingTypes": [
            {
              "name": "value to text",
              "value": 1
            },
            {
              "name": "range to text",
              "value": 2
            }
          ],
          "maxDataPoints": 100,
          "nullPointMode": "connected",
          "nullText": null,
          "postfix": "",
          "postfixFontSize": "50%",
          "prefix": "",
          "prefixFontSize": "50%",
          "rangeMaps": [
            {
              "from": "null",
              "text": "N/A",
              "to": "null"
            }
          ],
          "sparkline": {
            "fillColor": "rgba(31, 118, 189, 0.18)",
            "full": false,
            "lineColor": "rgb(31, 120, 193)",
            "show": false
          },
          "tableColumn": "",
          "targets": [
            {
              "expr": "node_boot_time_seconds{instance="$server"} * 1000",
              "format": "time_series",
              "intervalFactor": 1,
              "legendFormat": "System Uptime(days)",
              "refId": "A"
            }
          ],
          "thresholds": "",
          "timeFrom": null,
          "timeShift": null,
          "title": "System Start Time",
          "type": "singlestat",
          "valueFontSize": "80%",
          "valueMaps": [
            {
              "op": "=",
              "text": "N/A",
              "value": "null"
            }
          ],
          "valueName": "current"
        },
        {
          "cacheTimeout": null,
          "colorBackground": false,
          "colorValue": false,
          "colors": [
            "#299c46",
            "rgba(237, 129, 40, 0.89)",
            "#d44a3a"
          ],
          "datasource": "${DS_DEV_PROMETHEUS}",
          "format": "none",
          "gauge": {
            "maxValue": 100,
            "minValue": 0,
            "show": false,
            "thresholdLabels": false,
            "thresholdMarkers": true
          },
          "gridPos": {
            "h": 3,
            "w": 2,
            "x": 3,
            "y": 1
          },
          "id": 4,
          "interval": null,
          "links": [],
          "mappingType": 1,
          "mappingTypes": [
            {
              "name": "value to text",
              "value": 1
            },
            {
              "name": "range to text",
              "value": 2
            }
          ],
          "maxDataPoints": 100,
          "nullPointMode": "connected",
          "nullText": null,
          "postfix": "",
          "postfixFontSize": "50%",
          "prefix": "",
          "prefixFontSize": "50%",
          "rangeMaps": [
            {
              "from": "null",
              "text": "N/A",
              "to": "null"
            }
          ],
          "sparkline": {
            "fillColor": "rgba(31, 118, 189, 0.18)",
            "full": false,
            "lineColor": "rgb(31, 120, 193)",
            "show": false
          },
          "tableColumn": "",
          "targets": [
            {
              "expr": "count(count(node_cpu_seconds_total{instance="$server", mode='system'}) by (cpu))",
              "format": "time_series",
              "intervalFactor": 1,
              "refId": "A"
            }
          ],
          "thresholds": "",
          "timeFrom": null,
          "timeShift": null,
          "title": "CPU Cores",
          "type": "singlestat",
          "valueFontSize": "120%",
          "valueMaps": [
            {
              "op": "=",
              "text": "N/A",
              "value": "null"
            }
          ],
          "valueName": "current"
        },
        {
          "datasource": "${DS_DEV_PROMETHEUS}",
          "gridPos": {
            "h": 6,
            "w": 3,
            "x": 5,
            "y": 1
          },
          "id": 8,
          "links": [],
          "options": {
            "maxValue": 100,
            "minValue": 0,
            "showThresholdLabels": true,
            "showThresholdMarkers": true,
            "thresholds": [
              {
                "color": "#7EB26D",
                "index": 0,
                "value": null
              },
              {
                "color": "#FA6400",
                "index": 1,
                "value": 30
              },
              {
                "color": "#C4162A",
                "index": 2,
                "value": 70
              }
            ],
            "valueMappings": [],
            "valueOptions": {
              "decimals": 2,
              "prefix": "",
              "stat": "current",
              "suffix": "",
              "unit": "percent"
            }
          },
          "targets": [
            {
              "expr": "100 - (avg(irate(node_cpu_seconds_total{instance="$server",mode="idle"}[5m])) * 100)",
              "format": "time_series",
              "intervalFactor": 1,
              "refId": "A"
            }
          ],
          "timeFrom": null,
          "timeShift": null,
          "title": "CPU Usage (5m)",
          "type": "gauge"
        },
        {
          "datasource": "${DS_DEV_PROMETHEUS}",
          "gridPos": {
            "h": 6,
            "w": 3,
            "x": 8,
            "y": 1
          },
          "id": 10,
          "links": [],
          "options": {
            "maxValue": 100,
            "minValue": 0,
            "showThresholdLabels": true,
            "showThresholdMarkers": true,
            "thresholds": [
              {
                "color": "#7EB26D",
                "index": 0,
                "value": null
              },
              {
                "color": "#FA6400",
                "index": 1,
                "value": 30
              },
              {
                "color": "#C4162A",
                "index": 2,
                "value": 50
              }
            ],
            "valueMappings": [],
            "valueOptions": {
              "decimals": 2,
              "prefix": "",
              "stat": "current",
              "suffix": "",
              "unit": "percent"
            }
          },
          "targets": [
            {
              "expr": "avg(irate(node_cpu_seconds_total{instance="$server",mode="iowait"}[5m])) * 100",
              "format": "time_series",
              "intervalFactor": 1,
              "refId": "A"
            }
          ],
          "timeFrom": null,
          "timeShift": null,
          "title": "CPU IO Wait (5m)",
          "type": "gauge"
        },
        {
          "datasource": "${DS_DEV_PROMETHEUS}",
          "gridPos": {
            "h": 6,
            "w": 3,
            "x": 11,
            "y": 1
          },
          "id": 12,
          "links": [],
          "options": {
            "maxValue": 100,
            "minValue": 0,
            "showThresholdLabels": false,
            "showThresholdMarkers": true,
            "thresholds": [
              {
                "color": "#7EB26D",
                "index": 0,
                "value": null
              },
              {
                "color": "#FA6400",
                "index": 1,
                "value": 80
              },
              {
                "color": "#C4162A",
                "index": 2,
                "value": 90
              }
            ],
            "valueMappings": [],
            "valueOptions": {
              "decimals": null,
              "prefix": "",
              "stat": "current",
              "suffix": "",
              "unit": "percent"
            }
          },
          "targets": [
            {
              "expr": "(node_memory_MemTotal_bytes{instance="$server"} - (node_memory_MemFree_bytes{instance="$server"} + node_memory_Buffers_bytes{instance="$server"} + node_memory_Cached_bytes{instance="$server"})) / node_memory_MemTotal_bytes{instance="$server"} * 100",
              "format": "time_series",
              "intervalFactor": 1,
              "refId": "A"
            }
          ],
          "timeFrom": null,
          "timeShift": null,
          "title": "Memory Used",
          "type": "gauge"
        },
        {
          "datasource": "${DS_DEV_PROMETHEUS}",
          "gridPos": {
            "h": 6,
            "w": 3,
            "x": 14,
            "y": 1
          },
          "id": 13,
          "links": [],
          "options": {
            "maxValue": 100,
            "minValue": 0,
            "showThresholdLabels": false,
            "showThresholdMarkers": true,
            "thresholds": [
              {
                "color": "#C4162A",
                "index": 0,
                "value": null
              },
              {
                "color": "#FA6400",
                "index": 1,
                "value": 20
              },
              {
                "color": "#37872D",
                "index": 2,
                "value": 50
              }
            ],
            "valueMappings": [],
            "valueOptions": {
              "decimals": 2,
              "prefix": "",
              "stat": "current",
              "suffix": "",
              "unit": "percent"
            }
          },
          "targets": [
            {
              "expr": "(node_memory_Cached_bytes{instance="$server"} * 100) / node_memory_MemTotal_bytes{instance="$server"}",
              "format": "time_series",
              "intervalFactor": 1,
              "refId": "A"
            }
          ],
          "timeFrom": null,
          "timeShift": null,
          "title": "Memory Cached",
          "type": "gauge"
        },
        {
          "aliasColors": {},
          "bars": false,
          "dashLength": 10,
          "dashes": false,
          "datasource": "${DS_DEV_PROMETHEUS}",
          "fill": 1,
          "gridPos": {
            "h": 6,
            "w": 7,
            "x": 17,
            "y": 1
          },
          "id": 15,
          "legend": {
            "alignAsTable": true,
            "avg": false,
            "current": true,
            "max": true,
            "min": false,
            "rightSide": true,
            "show": true,
            "total": false,
            "values": true
          },
          "lines": true,
          "linewidth": 1,
          "links": [],
          "nullPointMode": "null",
          "paceLength": 10,
          "percentage": false,
          "pointradius": 2,
          "points": false,
          "renderer": "flot",
          "seriesOverrides": [],
          "stack": false,
          "steppedLine": false,
          "targets": [
            {
              "expr": "node_load1{instance="$server"}",
              "format": "time_series",
              "intervalFactor": 1,
              "legendFormat": "1m",
              "refId": "A"
            },
            {
              "expr": "node_load5{instance="$server"}",
              "format": "time_series",
              "intervalFactor": 1,
              "legendFormat": "5m",
              "refId": "B"
            },
            {
              "expr": "node_load15{instance="$server"}",
              "format": "time_series",
              "intervalFactor": 1,
              "legendFormat": "15m",
              "refId": "C"
            }
          ],
          "thresholds": [],
          "timeFrom": null,
          "timeRegions": [],
          "timeShift": null,
          "title": "System Average Load (1,5,15) ",
          "tooltip": {
            "shared": true,
            "sort": 0,
            "value_type": "individual"
          },
          "type": "graph",
          "xaxis": {
            "buckets": null,
            "mode": "time",
            "name": null,
            "show": true,
            "values": []
          },
          "yaxes": [
            {
              "format": "short",
              "label": null,
              "logBase": 1,
              "max": null,
              "min": null,
              "show": true
            },
            {
              "format": "short",
              "label": null,
              "logBase": 1,
              "max": null,
              "min": null,
              "show": true
            }
          ],
          "yaxis": {
            "align": false,
            "alignLevel": null
          }
        },
        {
          "cacheTimeout": null,
          "colorBackground": false,
          "colorValue": false,
          "colors": [
            "#299c46",
            "rgba(237, 129, 40, 0.89)",
            "#d44a3a"
          ],
          "datasource": "${DS_DEV_PROMETHEUS}",
          "format": "bytes",
          "gauge": {
            "maxValue": 100,
            "minValue": 0,
            "show": false,
            "thresholdLabels": false,
            "thresholdMarkers": true
          },
          "gridPos": {
            "h": 3,
            "w": 2,
            "x": 3,
            "y": 4
          },
          "id": 6,
          "interval": null,
          "links": [],
          "mappingType": 1,
          "mappingTypes": [
            {
              "name": "value to text",
              "value": 1
            },
            {
              "name": "range to text",
              "value": 2
            }
          ],
          "maxDataPoints": 100,
          "nullPointMode": "connected",
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            "tagsQuery": "",
            "type": "query",
            "useTags": false
          },
          {
            "allValue": null,
            "current": {},
            "datasource": "${DS_DEV_PROMETHEUS}",
            "definition": "pg_static",
            "hide": 0,
            "includeAll": false,
            "label": "Database",
            "multi": false,
            "name": "database",
            "options": [],
            "query": "pg_static",
            "refresh": 1,
            "regex": "/.*instance="([^"]*).*/",
            "skipUrlSync": false,
            "sort": 0,
            "tagValuesQuery": "",
            "tags": [],
            "tagsQuery": "",
            "type": "query",
            "useTags": false
          }
        ]
      },
      "time": {
        "from": "now-6h",
        "to": "now"
      },
      "timepicker": {
        "refresh_intervals": [
          "5s",
          "10s",
          "30s",
          "1m",
          "5m",
          "15m",
          "30m",
          "1h",
          "2h",
          "1d"
        ],
        "time_options": [
          "5m",
          "15m",
          "1h",
          "6h",
          "12h",
          "24h",
          "2d",
          "7d",
          "30d"
        ]
      },
      "timezone": "",
      "title": "PostgreSQL Database",
      "uid": "XfxdINqiz",
      "version": 56
    }
    View Code
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  • 原文地址:https://www.cnblogs.com/ilifeilong/p/10543876.html
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