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feat(http): add monitorIncomingHTTPRequests config #1298

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merged 5 commits into from
Sep 20, 2019

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Qard
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@Qard Qard commented Aug 21, 2019

PR for splitting disabling of outgoing http requests from incoming http requests.

Closes #434

Checklist

  • Implement code
  • Add tests
  • Update documentation

@Qard Qard requested a review from watson August 21, 2019 17:00
@Qard Qard self-assigned this Aug 21, 2019
@Qard Qard force-pushed the split-http branch 2 times, most recently from 76aaef6 to 8aa4344 Compare August 21, 2019 23:55
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watson commented Aug 22, 2019

Tip: You can use the new Draft PR feature of GitHub for WIP PR's 😃

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Looks good so far...

I do think it might be easy to misunderstand what disableInstrumentations: ['http'] does with the introduction of monitorIncomingHTTPRequests. A user could easily think that disableInstrumentations: ['http'] would disable both incoming and outgoing, while only monitorIncomingHTTPRequests: false would disable only incoming. But I guess this is just a matter of proper documentation.

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@watson watson added this to the v3.0.0 milestone Aug 23, 2019
@Qard Qard force-pushed the split-http branch 2 times, most recently from 8ce0462 to d6d7177 Compare August 27, 2019 22:34
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It all looks good 💯

I think all we're missing now is:

  • Docs
  • Update TypeScript typings for the config options object (AgentConfigOptions)
  • And I'm just wondering if it would be worth it to add a test to see what happens if you set this new config option to false. For example where you then start an HTTP server which, when it gets an incoming HTTP request starts a manual transaction and make an outgoing HTTP request. The make a request to this HTTP server and check that it didn't try to create a transaction automatically but still created the manual transaction and a span for the outgoing request.

@Qard Qard force-pushed the split-http branch 3 times, most recently from f673118 to 866836c Compare August 29, 2019 23:48
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Qard commented Sep 5, 2019

I've narrowed the 12.0 failure to http.request(...) losing context before emitting the 'response' event, which calls the response handler function, if given. I'm not sure yet exactly where that context loss occurs between the the call and the handler. Possibly some internals in net? 🤔

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Qard commented Sep 9, 2019

The failure is due to the issue fixed by nodejs/node#27477, which didn't land until 12.2.0. As a result, all 12.x releases before 12.2.0 will actually have a context loss in the response handler of all outgoing requests. Apparently our existing tests just happened to not cover that particular case. 🤔

@Qard Qard force-pushed the split-http branch 3 times, most recently from e993455 to feae7bd Compare September 11, 2019 21:20
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watson commented Sep 13, 2019

The PR description still says WIP, but I assume it's ready now?

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watson previously approved these changes Sep 13, 2019
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Qard commented Sep 13, 2019

Yep, just forgot to update the description. 👍

@watson watson merged commit 130ef6f into elastic:master Sep 20, 2019
watson added a commit to watson/apm-agent-nodejs that referenced this pull request Sep 20, 2019
The PR elastic#1298 introduced a bug in the tests as it expected the span.type
for outgoing http requests to start with `ext.*`. This was changed to
`external.*` in the PR elastic#1291, but elastic#1298 was just never updated to be up
to date with master before it was merged.
watson added a commit that referenced this pull request Sep 20, 2019
The PR #1298 introduced a bug in the tests as it expected the span.type
for outgoing http requests to start with `ext.*`. This was changed to
`external.*` in the PR #1291, but #1298 was just never updated to be up
to date with master before it was merged.
@Qard Qard deleted the split-http branch September 20, 2019 22:36
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Allow more fine grained disabling of http module features
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