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Validating environment variables

The configuration for Azure Application Insights relies on certain environment variables and it is usually a good practice to validate the presence of those environment variables.

Open env.ts file, copy and paste the following below.

  AZURE_APPLICATION_INSIGHTS_KEY: Env.schema.string(),
  AZURE_APPLICATION_INSIGHTS_ENDPOINT_URL: Env.schema.string.optional({format: 'url'}),
  AZURE_APPLICATION_INSIGHTS_QUICK_PULSE_HOST: Env.schema.string.optional({format: 'url'}),
  AZURE_APPLICATION_INSIGHTS_PROXY_HTTP_URL: Env.schema.string.optional({format: 'url'}),
  AZURE_APPLICATION_INSIGHTS_PROXY_HTTPS_URL: Env.schema.string.optional({format: 'url'}),
  AZURE_APPLICATION_INSIGHTS_AUTO_DEPENDENCY_CORRELATION: Env.schema.boolean.optional(),
  AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_REQUESTS: Env.schema.boolean.optional(),
  AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_PERFORMANCE: Env.schema.boolean.optional(),
  AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_PERFORMANCE_EXTENDED: Env.schema.boolean.optional(),
  AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_EXCEPTIONS: Env.schema.boolean.optional(),
  AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_DEPENDENCIES: Env.schema.boolean.optional(),
  AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_CONSOLE: Env.schema.boolean.optional(),
  AZURE_APPLICATION_INSIGHTS_USE_DISK_RETRY_CACHING: Env.schema.boolean.optional(),
  AZURE_APPLICATION_INSIGHTS_SEND_LIVE_METRICS: Env.schema.boolean.optional(),
  AZURE_APPLICATION_INSIGHTS_SAMPLING_PERCENTAGE: Env.schema.number.optional(),
  AZURE_APPLICATION_INSIGHTS_MAX_BATCH_SIZE: Env.schema.number.optional(),
  AZURE_APPLICATION_INSIGHTS_MAX_BATCH_INTERVAL_MS: Env.schema.number.optional(),
  AZURE_APPLICATION_INSIGHTS_CORRELATION_ID_RETRY_INTERVAL_MS: Env.schema.number.optional(),
  AZURE_APPLICATION_INSIGHTS_CORRELATION_HEADER_EXCLUDED_DOMAINS: (key, value: string): string[] | null => {
    if (value) {
      let excludedDomains = value.split(',')
      if (Array.isArray(excludedDomains)) {
        return excludedDomains
      }
    }
    return null
  },

Requirements 📦

npm install adonis-logger-azure-application-insights --save

node ace configure adonis-logger-azure-application-insights

Define config 💾

Create environment variables to configure the package

Key Type Default Required
AZURE_APPLICATION_INSIGHTS_KEY String Yes
AZURE_APPLICATION_INSIGHTS_ENDPOINT_URL String No
AZURE_APPLICATION_INSIGHTS_QUICK_PULSE_HOST String No
AZURE_APPLICATION_INSIGHTS_PROXY_HTTP_URL String No
AZURE_APPLICATION_INSIGHTS_PROXY_HTTPS_URL String No
AZURE_APPLICATION_INSIGHTS_AUTO_DEPENDENCY_CORRELATION Boolean True No
AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_REQUESTS Boolean True No
AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_PERFORMANCE Boolean True No
AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_PERFORMANCE_EXTENDED Boolean True No
AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_EXCEPTIONS Boolean True No
AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_DEPENDENCIES Boolean True No
AZURE_APPLICATION_INSIGHTS_AUTO_COLLECT_CONSOLE Boolean True No
AZURE_APPLICATION_INSIGHTS_USE_DISK_RETRY_CACHING Boolean True No
AZURE_APPLICATION_INSIGHTS_SEND_LIVE_METRICS Boolean False No
AZURE_APPLICATION_INSIGHTS_SAMPLING_PERCENTAGE Number 100 No
AZURE_APPLICATION_INSIGHTS_MAX_BATCH_SIZE Number 250 No
AZURE_APPLICATION_INSIGHTS_MAX_BATCH_INTERVAL_MS Number 15000 No
AZURE_APPLICATION_INSIGHTS_CORRELATION_ID_RETRY_INTERVAL_MS Number 30000 No
AZURE_APPLICATION_INSIGHTS_CORRELATION_HEADER_EXCLUDED_DOMAINS Comma seperated String of Domains No

Usage

Error handler

import Logger from '@ioc:Adonis/Core/Logger'
import HttpExceptionHandler from '@ioc:Adonis/Core/HttpExceptionHandler'
import { HttpContextContract } from '@ioc:Adonis/Core/HttpContext'
import AzureApplicationInsights from '@ioc:Adonis/Addons/AzureApplicationInsights'

export default class ExceptionHandler extends HttpExceptionHandler {
  protected statusPages = {
    '403': 'errors/unauthorized',
    '404': 'errors/not-found',
    '500..599': 'errors/server-error',
  }

  constructor () {
    super(Logger)
  }

  public async handle (error: any, ctx: HttpContextContract) {
    AzureApplicationInsights.defaultClient.trackException({
      exception: error,
    })

    return super.handle(error, ctx)
  }
}

Log every request

Create middleware file

node ace make:middleware ApplicationInsights

Update start/kernel.ts with

import { HttpContextContract } from '@ioc:Adonis/Core/HttpContext'
import AzureApplicationInsights from '@ioc:Adonis/Addons/AzureApplicationInsights'

export default class Insight {
  public async handle ({ request, response }: HttpContextContract, next: () => Promise<void>) {
    AzureApplicationInsights.defaultClient.trackNodeHttpRequest({
      request: request.request,
      response: response.response,
    })

    await next()
  }
}

Log events

Make a new preload file

node ace make:prldfile events

Define an event listener that listens to all events inside start/events.ts.

import Event from '@ioc:Adonis/Core/Event'
import AzureApplicationInsights from '@ioc:Adonis/Addons/AzureApplicationInsights'

Event.onAny((eventName, eventData) => {
  AzureApplicationInsights.defaultClient.trackEvent({
    name: eventName,
    properties: eventData,
  })
})