overleaf/libraries/metrics
Jakob Ackermann 8789296f5a Merge pull request #6481 from overleaf/jpa-node-14-18-3
[misc] upgrade node version from 14.18.1 to 14.18.3

GitOrigin-RevId: 976542fcc0271e323695c59a987dcf1614ee633e
2022-01-28 09:03:53 +00:00
..
.circleci Fix startup crash 2020-09-17 10:30:25 -04:00
test Merge pull request #6120 from overleaf/jpa-same-linting-packages 2021-12-17 09:03:06 +00:00
.dockerignore Merge pull request #5724 from overleaf/jpa-lean-docker-build 2021-11-09 09:04:02 +00:00
.gitignore [misc] prepare for monorepo 2021-07-27 16:33:33 +01:00
.npmignore Add .npmignore to avoid publishing config files 2020-09-17 10:44:24 -04:00
.nvmrc Merge pull request #6481 from overleaf/jpa-node-14-18-3 2022-01-28 09:03:53 +00:00
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LICENSE Create LICENSE 2014-09-08 09:19:39 +01:00
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uv_threadpool_size.js Merge pull request #6120 from overleaf/jpa-same-linting-packages 2021-12-17 09:03:06 +00:00

overleaf/metrics-module

Wrappers the prom-client npm module to provide Prometheus metrics at /metrics.

Use:

const metrics = require('@overleaf/metrics')
metrics.initialize('myapp')

const express = require('express')
const app = express()
metrics.injectMetricsRoute(app)

Request logging can be enabled:

const logger = require('@overleaf/logger')
...
app.use(metrics.http.monitor(logger))

The metrics module can be configured through the following environment variables:

  • DEBUG_METRICS - enables display of debugging messages to the console.
  • ENABLE_TRACE_AGENT - enables @google-cloud/trace-agent on Google Cloud
  • ENABLE_DEBUG_AGENT - enables @google-cloud/debug-agent on Google Cloud
  • ENABLE_PROFILE_AGENT - enables @google-cloud/profiler on Google Cloud
  • METRICS_COMPRESSION_LEVEL - sets the compression level for /metrics
  • STACKDRIVER_LOGGING - toggles the request logging format
  • UV_THREADPOOL_SIZE - sets the libuv thread pool size