Push timeseries to Prometheus via remote_write

Using remote_write facility (see https://prometheus.io/docs/prometheus/latest/configuration/configuration/#remote_write) to send metrics to remote Prometheus from NodeJS app.

Pretty much anything from https://prometheus.io/docs/operating/integrations/#remote-endpoints-and-storage should be supported, but tested only with grafana.com:

• AppOptics
• AWS Timestream
• Azure Data Explorer
• Azure Event Hubs
• Chronix
• Cortex
• CrateDB
• Elasticsearch
• Gnocchi
• Google BigQuery
• Google Cloud Spanner
• Graphite
• InfluxDB
• Instana
• IRONdb
• Kafka
• M3DB
• New Relic
• OpenTSDB
• PostgreSQL/TimescaleDB
• QuasarDB
• SignalFx
• Splunk
• Sysdig Monitor
• TiKV
• Thanos
• VictoriaMetrics
• Wavefront

(List copied from https://github.com/prometheus/docs/blob/main/content/docs/operating/integrations.md)

Usage:

import { pushTimeseries, pushMetrics } from "prometheus-remote-write";

// Just push some metrics metrics
await pushMetrics(
  {
    queue_depth_total: 100,
  },
  {
    url: process.env.GRAFANA_PUSH_URL || "http://localhost:9201",
    labels: { service: "queue-worker" },
  }
);

// Follows remote_write payload format (see https://github.com/prometheus/prometheus/blob/main/prompb/types.proto)
await pushTimeseries(
  {
    labels: {
      // Name should conform to https://prometheus.io/docs/practices/naming/
      __name__: "queue_depth_total",
      instance: "dev.example.com",
      service: "SQS",
    },
    samples: [
      {
        value: 150,
        timestamp: Date.now(),
      },
    ],
  },
  config
);


// Full config - only url is required
const config = {
  // Remote url
  url: "http://localhost:9201",
  // Auth settings
  auth: {
    username: "...",
    password: "...",
  },
  // Optional prometheus protocol descripton .proto/.json
  proto: undefined,
  // Override default console.name(...log) used
  console: undefined,
  // Be verbose
  verbose: false,
  timing: false,
  // Override used node-fetch
  fetch: undefined,
  // Additional labels to apply to each timeseries, i.e. [{ service: "SQS" }]
  labels: undefined
};

Links

• https://prometheus.io/docs/prometheus/latest/configuration/configuration/#remote_write
• https://grafana.com/docs/grafana-cloud/metrics-prometheus/
• https://docs.newrelic.com/docs/infrastructure/prometheus-integrations/install-configure-remote-write/set-your-prometheus-remote-write-integration/
• https://prometheus.io/docs/operating/integrations/#remote-endpoints-and-storage