@kth/appinsights

A wrapper to send telemetry to Azure Application Insights, based on the @azure/monitor-opentelemetry package.

This is intended for a standard use-case only. If your app needs more options, please use the core package instead.

Usage

This package works by injecting code that captures telemetry from the application. To get full tracking, this package should be initialized as soon as possible in the code.

import { KthAppinsights } from '@kth/appinsights'

KthAppinsights.init({ name: 'app-name' })

Options

type appinsightOptions = {
  name?: string // Optional. Name of the application
  samplingPercentage?: number // Optional. Reduce the amount of telemetry collected
  trackMongoDb?: boolean // Optional. Set to false to disable MongoDB tracking. Default true
  trackRedis?: boolean // Optional. Set to false to disable Redis tracking. Default true
}

Features

Name and Instance name.

The if name is passed in the options, it will be used to set "Cloud role name" and "Cloud role instance".

User agent on requests

If a request has the user-agent header set, it will be saved in the custom property user_agent.

Bunyan and Winston logs

Log records from Bunyan (used by @kth/log) and Winston are automatically collected as OpenTelemetry logs.

Telemetry Sampling

Used to reduce the amount of telemetry collected, primary used to reduce cost. Enable with option samplingPercentage. Default is 100% = everything is collected.

MongoDB and Redis tracking

MongoDB and Redis dependency calls are tracked by default. Disable either with trackMongoDb: false or trackRedis: false.

Custom dependencies

Track a call to something not already auto-collected (HTTP, MongoDB, Redis, ...), which shows up in Application Insights' Dependencies view.

KthAppinsights.trackDependency({
  name: 'findData',
  dependencyTypeName: 'External Service', // Shows as "Type"
  data: 'id: 1234', // Shows as "Command"
  success: true,
  duration: 5, // milliseconds
  resultCode: 200, // Maps to a custom field
})

Custom events

Send a custom event, which shows up in Application Insights' customEvents table.

KthAppinsights.trackEvent({
  name: 'search',
  properties: { searchOrigin: 'header', queryIn: 'test query' },
})

Custom metrics

Record a custom metric value, which shows up in Application Insights' customMetrics table.

KthAppinsights.trackMetric({
  name: 'api_lookup',
  value: 21,
})

Shutdown

Force-send any buffered telemetry when app is shut down.

process.on('SIGTERM', async () => {
  await KthAppinsights.shutdown()
  process.exit(0)
})

Track operations for Agenda jobs

This is not intended to be used on all agenda jobs. Only use ut when there is an actuall need.
A helper that groups all events in a agenda-jobb in a tracable operation.

Example:

const { AppinsightsUtils } = require('@kth/appinsights')

agenda.define('operation_name', AppinsightsUtils.agendaRequestWrapper('operation_name', jobFunction))