Prometheus+Grafana监控nodejs（docker版）

介绍

Prometheus + Grafana 架构图

Prometheus

Prometheus 是什么？

Prometheus 是一个开源系统监控和警报工具包，最初由 SoundCloud 构建。 自 2012 年启动以来，许多公司和组织都采用了 Prometheus，该项目拥有非常活跃的开发者和用户社区。 它现在是一个独立的开源项目，独立于任何公司进行维护。 为了强调这一点，并明确项目的治理结构，Prometheus 于 2016 年作为继 Kubernetes 之后的第二个托管项目加入了云原生计算基金会。

Prometheus 将其指标收集并存储为时间序列数据，即指标信息与记录时的时间戳以及称为标签的可选键值对一起存储。

Prometheus 特征

具有由指标名称和键/值对标识的时间序列数据的多维数据模型

PromQL，一种灵活的查询语言来利用这个维度

不依赖分布式存储； 单个服务器节点是自治的

时间序列收集通过 HTTP 上的拉模型进行

通过中间网关支持推送时间序列

通过服务发现或静态配置发现目标

多种图形和仪表板支持模式

点击了解更多

Grafana

Grafana(官网) 是一个可视化大型测量数据的开源程序。可认为是一个图表库，可自定义图表布局，也可从网上下载布局模板。下载模板操作步骤如下：

• 点搜索
• 输入 nodejs，搜索出现很多面板
• 随便点击一个，里面有个模板 ID，后面会用到

监控场景

• 本文，演示 Prometheus + Grafana 监听某个服务（node-server）的资源使用情况；
• 在上文的架构图中，我们不需要 Pushgateway、Alertmanager；
• 只需要 Prometheus-server、Grafana、某个被监听的服务（node-server）。

准备环境

1. windows11；
2. wsl2(安装教程)，可能需要科学上网；
3. docker，用的是 decker-desktop(下载)；
4. 被监听的服务，本文使用：一个 local-server 和 一个预发布-docker。

在终端打开 Ubuntu 命令行（我装的是 Ubuntu）

下载镜像包

• 在终端中安装

docker pull prom/node-exporter
docker pull prom/prometheus
docker pull grafana/grafana

（prom/exporter 选装，为了演示数据，先装上）

• 或者，在 docker-desktop 中下载镜像。搜索镜像，pull，此方式下载后先不要运行 Prometheus 和 Grafana，这俩需要先做一些配置，如下图：

启动 node-exporter（选装）

• 终端启动：

docker run -d -p 9100:9100 \
  -v "/proc:/host/proc:ro" \
  -v "/sys:/host/sys:ro" \
  -v "/:/rootfs:ro" \
  prom/node-exporter

• 访问 url：http://localhost:9100/metrics 看到如下图所示，说明该服务启动成功：

• 说明，Grafana 是用 Go 语言开发的，node-exporter 的指标（metrics）大多以 go_ 开头。这并不适合本文演示的 nodejs，所以标为“选装”

启动 Prometheus

• 终端新建目录 prometheus，编辑配置文件 prometheus.yml：

mkdir /opt/prometheus
cd /opt/prometheus/
vim prometheus.yml

• prometheus.yml 内容示例如下：

global:
  scrape_interval:     5s #采集间隔
  evaluation_interval: 5s

scrape_configs:
  - job_name: 'prometheus'
    static_configs:
      - targets: ['localhost:9090']

scrape_configs:
  - job_name: 'node-exporter'
    static_configs:
      - targets: ['192.168.1.10:9100'] #注意，此处写宿主机的本地 ip

  - job_name: 'file-service-local' #加入监听
    static_configs:
      - targets: ['192.168.1.10:8102'] #注意，此处写宿主机的本地 ip

  - job_name: 'file-service-3.203' #加入监听
    static_configs:
      - targets: ['192.168.3.203:32730'] #注意，此处写宿主机的本地 ip

• 注意：

  • 监听其他服务，格式不变，一个 job_name 对应一个 targets，targets 是个数组，可以添加多个 target
  • 修改配置文件（prometheus.yml）后，需要停止和删除容器：prom/prometheus（在 docker-desktop 中操作），再启动 Prometheus

• 终端启动：

docker run  -d \
  -p 9090:9090 \
  -v /opt/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml  \
  prom/prometheus

• 访问 url: http://localhost:9090/ ，可输入某个指标，点Execute，看到如下图：

• 点击下拉框，Targets，可以看到你配置文件中的服务是否正常启动：

启动 Grafana

• 用终端新建目录 grafana-storage，用于 grafana 存储数据

mkdir /opt/grafana-storage

• 设置权限

chmod 777 -R /opt/grafana-storage

• 终端启动：

docker run -d \
  -p 3000:3000 \
  --name=grafana \
  -v /opt/grafana-storage:/var/lib/grafana \
  grafana/grafana

• 访问 url：http://localhost:3000/ ，登录，用户和密码都是 admin。登录后要求你重置密码，当然你也可以设置同一个密码

• 进入主页，设置数据源，如图：

• 创建仪表盘。导入 json 文件，或输入 ID 下载（见上文），我用的是模板 ID 为：11159，如下图：

• 仪表盘中的每个图表板块都可以配置，编辑或移除，多尝试探索下设置：

• 我的 dashboard-json 有需要可以看看

展开查看

{
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": {
          "type": "datasource",
          "uid": "grafana"
        },
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "target": {
          "limit": 100,
          "matchAny": false,
          "tags": [],
          "type": "dashboard"
        },
        "type": "dashboard"
      }
    ]
  },
  "description": "node.js prometheus client basic metrics",
  "editable": true,
  "fiscalYearStartMonth": 0,
  "gnetId": 11159,
  "graphTooltip": 0,
  "id": 1,
  "links": [],
  "liveNow": false,
  "panels": [
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": {
        "type": "prometheus",
        "uid": "hpQAqjxVz"
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 7,
        "w": 19,
        "x": 0,
        "y": 0
      },
      "hiddenSeries": false,
      "id": 7,
      "interval": "5",
      "legend": {
        "alignAsTable": true,
        "avg": true,
        "current": true,
        "max": true,
        "min": true,
        "rightSide": true,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "paceLength": 10,
      "percentage": false,
      "pluginVersion": "9.4.3",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "process_resident_memory_bytes{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Process Memory - {{instance}}",
          "refId": "A"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "nodejs_heap_size_total_bytes{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Heap Total - {{instance}}",
          "refId": "B"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "nodejs_heap_size_used_bytes{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Heap Used - {{instance}}",
          "refId": "C"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "nodejs_external_memory_bytes{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "External Memory - {{instance}}",
          "refId": "D"
        }
      ],
      "thresholds": [],
      "timeRegions": [],
      "title": "Process Memory Usage",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "mode": "time",
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "bytes",
          "logBase": 1,
          "show": true
        },
        {
          "format": "short",
          "logBase": 1,
          "show": true
        }
      ],
      "yaxis": {
        "align": false
      }
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "hpQAqjxVz"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [
            {
              "options": {
                "match": "null",
                "result": {
                  "text": "N/A"
                }
              },
              "type": "special"
            }
          ],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "none"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 3,
        "w": 5,
        "x": 19,
        "y": 0
      },
      "id": 2,
      "interval": "",
      "links": [],
      "maxDataPoints": 100,
      "options": {
        "colorMode": "none",
        "graphMode": "none",
        "justifyMode": "auto",
        "orientation": "horizontal",
        "reduceOptions": {
          "calcs": [
            "mean"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "name"
      },
      "pluginVersion": "9.4.3",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "editorMode": "code",
          "expr": "nodejs_version_info{}",
          "format": "time_series",
          "instant": false,
          "interval": "",
          "intervalFactor": 1,
          "legendFormat": "{{version}}",
          "refId": "A"
        }
      ],
      "title": "Node.js Version",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "hpQAqjxVz"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "fixedColor": "#F2495C",
            "mode": "fixed"
          },
          "mappings": [
            {
              "options": {
                "match": "null",
                "result": {
                  "text": "N/A"
                }
              },
              "type": "special"
            }
          ],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "none"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 4,
        "w": 5,
        "x": 19,
        "y": 3
      },
      "id": 4,
      "links": [],
      "maxDataPoints": 100,
      "options": {
        "colorMode": "none",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "horizontal",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "9.4.3",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "sum(changes(process_start_time_seconds{instance=~\"$instance\"}[1m]))",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "{{instance}}",
          "refId": "A"
        }
      ],
      "title": "Process Restart Times",
      "type": "stat"
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": {
        "type": "prometheus",
        "uid": "hpQAqjxVz"
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 7,
        "w": 10,
        "x": 0,
        "y": 7
      },
      "hiddenSeries": false,
      "id": 6,
      "legend": {
        "alignAsTable": true,
        "avg": true,
        "current": true,
        "max": true,
        "min": true,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "paceLength": 10,
      "percentage": false,
      "pluginVersion": "9.4.3",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "irate(process_cpu_user_seconds_total{instance=~\"$instance\"}[2m]) * 100",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "User CPU - {{instance}}",
          "refId": "A"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "irate(process_cpu_system_seconds_total{instance=~\"$instance\"}[2m]) * 100",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Sys CPU - {{instance}}",
          "refId": "B"
        }
      ],
      "thresholds": [],
      "timeRegions": [],
      "title": "Process CPU Usage",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "mode": "time",
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "percent",
          "logBase": 1,
          "show": true
        },
        {
          "format": "short",
          "logBase": 1,
          "show": true
        }
      ],
      "yaxis": {
        "align": false
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": {
        "type": "prometheus",
        "uid": "hpQAqjxVz"
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 7,
        "w": 6,
        "x": 10,
        "y": 7
      },
      "hiddenSeries": false,
      "id": 9,
      "legend": {
        "alignAsTable": true,
        "avg": true,
        "current": true,
        "max": true,
        "min": true,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "paceLength": 10,
      "percentage": false,
      "pluginVersion": "9.4.3",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "nodejs_active_handles_total{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Active Handler - {{instance}}",
          "refId": "A"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "nodejs_active_requests_total{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Active Request - {{instance}}",
          "refId": "B"
        }
      ],
      "thresholds": [],
      "timeRegions": [],
      "title": "Active Handlers/Requests Total",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "mode": "time",
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "short",
          "logBase": 1,
          "show": true
        },
        {
          "format": "short",
          "logBase": 1,
          "show": true
        }
      ],
      "yaxis": {
        "align": false
      }
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "hpQAqjxVz"
      },
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "palette-classic"
          },
          "custom": {
            "axisCenteredZero": false,
            "axisColorMode": "text",
            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
            "fillOpacity": 10,
            "gradientMode": "none",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "lineInterpolation": "linear",
            "lineWidth": 1,
            "pointSize": 5,
            "scaleDistribution": {
              "type": "linear"
            },
            "showPoints": "never",
            "spanNulls": false,
            "stacking": {
              "group": "A",
              "mode": "none"
            },
            "thresholdsStyle": {
              "mode": "off"
            }
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 7,
        "w": 8,
        "x": 16,
        "y": 7
      },
      "id": 14,
      "options": {
        "legend": {
          "calcs": [],
          "displayMode": "list",
          "placement": "bottom",
          "showLegend": true
        },
        "tooltip": {
          "mode": "single",
          "sort": "none"
        }
      },
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "editorMode": "code",
          "expr": "nodejs_eventloop_lag_seconds{}",
          "legendFormat": "__auto__",
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Event Loop Lag",
      "type": "timeseries"
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": {
        "type": "prometheus",
        "uid": "hpQAqjxVz"
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 8,
        "w": 8,
        "x": 0,
        "y": 14
      },
      "hiddenSeries": false,
      "id": 10,
      "legend": {
        "alignAsTable": true,
        "avg": true,
        "current": true,
        "max": true,
        "min": true,
        "rightSide": false,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "paceLength": 10,
      "percentage": false,
      "pluginVersion": "9.4.3",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "nodejs_heap_space_size_total_bytes{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Heap Total - {{instance}} - {{space}}",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeRegions": [],
      "title": "Heap Total Detail",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "mode": "time",
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "bytes",
          "logBase": 1,
          "show": true
        },
        {
          "format": "short",
          "logBase": 1,
          "show": true
        }
      ],
      "yaxis": {
        "align": false
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": {
        "type": "prometheus",
        "uid": "hpQAqjxVz"
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 8,
        "w": 8,
        "x": 8,
        "y": 14
      },
      "hiddenSeries": false,
      "id": 11,
      "legend": {
        "alignAsTable": true,
        "avg": true,
        "current": true,
        "max": true,
        "min": true,
        "rightSide": false,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "paceLength": 10,
      "percentage": false,
      "pluginVersion": "9.4.3",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "nodejs_heap_space_size_used_bytes{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Heap Used - {{instance}} - {{space}}",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeRegions": [],
      "title": "Heap Used Detail",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "mode": "time",
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "bytes",
          "logBase": 1,
          "show": true
        },
        {
          "format": "short",
          "logBase": 1,
          "show": true
        }
      ],
      "yaxis": {
        "align": false
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": {
        "type": "prometheus",
        "uid": "hpQAqjxVz"
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 8,
        "w": 8,
        "x": 16,
        "y": 14
      },
      "hiddenSeries": false,
      "id": 12,
      "legend": {
        "alignAsTable": true,
        "avg": true,
        "current": true,
        "max": true,
        "min": true,
        "rightSide": false,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "paceLength": 10,
      "percentage": false,
      "pluginVersion": "9.4.3",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "hpQAqjxVz"
          },
          "expr": "nodejs_heap_space_size_available_bytes{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Heap Used - {{instance}} - {{space}}",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeRegions": [],
      "title": "Heap Available Detail",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "mode": "time",
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "bytes",
          "logBase": 1,
          "show": true
        },
        {
          "format": "short",
          "logBase": 1,
          "show": true
        }
      ],
      "yaxis": {
        "align": false
      }
    }
  ],
  "refresh": "5s",
  "revision": 1,
  "schemaVersion": 38,
  "style": "dark",
  "tags": [
    "nodejs"
  ],
  "templating": {
    "list": [
      {
        "allValue": "",
        "current": {
          "selected": true,
          "text": [
            "192.168.1.10:8102"
          ],
          "value": [
            "192.168.1.10:8102"
          ]
        },
        "datasource": {
          "type": "prometheus",
          "uid": "hpQAqjxVz"
        },
        "definition": "label_values(nodejs_version_info, instance)",
        "hide": 0,
        "includeAll": false,
        "label": "instance",
        "multi": true,
        "name": "instance",
        "options": [],
        "query": {
          "query": "label_values(nodejs_version_info, instance)",
          "refId": "StandardVariableQuery"
        },
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 1,
        "tagValuesQuery": "",
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-1h",
    "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": "NodeJS Application Dashboard",
  "uid": "PTSqcpJWk",
  "version": 27,
  "weekStart": ""
}

• 注意，此 nodejs-dashboard 不会显示 node-exporter 节点的数据。不同的监听节点有不同的 dashboard，上 Grafana 自行搜索。

代码怎么写

node-server 项目中，安装依赖：

prom-client
prometheus-api-metrics

Github | prometheus-api-metrics

代码很简单，在入口文件（如，app.ts）增加两行代码即可，插件会自动添加路由（/metrics），如下：

// express
import apiMetrics from 'prometheus-api-metrics'
app.use(apiMetrics({ defaultMetricsInterval: 5000 }))

// koa
const { koaMiddleware } = require('prometheus-api-metrics')
app.use(koaMiddleware())

启动 node 服务，Prometheus 就可以采集到数据了

ts-node app.ts

启动服务后，打开对应的端口号和路由路径，如果能看到下图，说明服务成功：

示例

nodejs 主要监听服务过程中是否存在【内存泄漏】和【资源使用情况】（比如，某个操作导致消耗的内存增加，但结束后并没释放，则可能存在内存泄漏）。贴两张我的面板图

本地：

预发布 docker

疑问：本地的 Prometheus 怎么访问到 预发布环境的 docker？答：只要服务暴露外部访问端口，ping 通就能访问！

不足之处

文中的监控服务 Prometheus + Grafana，仅在本地测试。

服务只能监控资源使用情况，但不能打快照，快照分析可具体定位到哪个文件和函数。可能是我懒惰了浅尝辄止学习能力的问题，根据自己的项目情况够用就行！

Easy-Monitor3.0 可以抓取快照，有兴趣的去看看 Easy-Monitor 3.0 使用指南

参考链接

有什么好点子和建议，欢迎评论留言~