METRICS: P0: Ensure tracing telemetry being logged in Application Insights Trace

[daveta]

Title: METRICS: P0: Ensure tracing telemetry being logged in Application Insights Trace

Application Insights has ability to intercept ILogger events (in C#), find out equivalent in NodeJS - make sure this is turned on for all samples. Add to documentation.

[benbrown]

Theoretically this means intercepting messages sent to console.*

[daveta]

@benbrown: Haven't tested, but I think the way to enable the console hook is
.setAutoCollectConsole(true).

Here's the blurb:
https://github.com/Microsoft/ApplicationInsights-node.js/#configuration

If you agree, we can probably close this.
I think this matches reasonably close what we're doing on C#:

appInsights.setup(appInsightsSettings.instrumentationKey)
    .setAutoDependencyCorrelation(true)
    .setAutoCollectRequests(true)
    .setAutoCollectPerformance(true)
    .setAutoCollectExceptions(true)
    .setAutoCollectDependencies(true)
    .setAutoCollectConsole(true)
    .start();

[benbrown]

Looks like we need it to be .setAutoCollectConsole(true, true) to get the actual console.logs, which I believe is what we're trying to do.

To be clear, this would capture ALL debug/trace output that would normally go to the terminal.

[benbrown]

OK I can confirm that calling .setAutoCollectConsole(true, true) will capture all console.logs and send them to Applicaiton Insights as TRACE events.