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feat(node): Implement Sentry-specific http instrumentation #13763
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mydea
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Sep 24, 2024
dev-packages/e2e-tests/test-applications/node-otel-without-tracing/src/instrument.ts
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) Found this while working on #13763. Oops, the node-otel-without-tracing E2E test was not running on CI, we forgot to add it there - and it was actually failing since we switched to the new undici instrumentation :O This PR ensures to add it to CI, and also fixes it. The main change for this is to ensure we do not emit any spans when tracing is disabled, while still ensuring that trace propagation works as expected for this case. I also pulled some general changes into this, which ensure that we patch both `http.get` and `http.request` properly.
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This reverts commit f5ab591.
Do not preload our custom sentry stuff
v1.11.1 of |
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NOTE: This is currently blocked by nodejs/import-in-the-middle#98
This PR is a pretty big change, but it should help us to make custom OTEL support way better/easier to understand in the future.
The fundamental problem this PR is trying to change is the restriction that we rely on our instance of
HttpInstrumentation
for Sentry-specific (read: not span-related) things. This made it tricky/annoying for users with a custom OTEL setup that may includeHttpInstrumentation
to get things working, because they may inadvertedly overwrite our instance of the instrumentation (because there can only be a single monkey-patch per module in the regular instrumentations), leading to hard-to-debug and often subtle problems.This PR fixes this by splitting out the non-span related http instrumentation code into a new, dedicated
SentryHttpInstrumentation
, which can be run side-by-side with the OTEL instrumentation (which emits spans, ...).We make this work by basically implementing our own custom, minimal
wrap
method instead of using shimmer. This way, OTEL instrumentation cannot identify the wrapped module as wrapped, and allow to wrap it again. While this is slightly hacky and also means you cannot unwrap the http module, we do not generally support this for the Sentry SDK anyhow.This new Instrumentation does two things:
With this change, in errors only mode you really do not need our instance of the default
HttpInstrumentation
anymore at all, you can/should just provide your own if you want to capture http spans in a non-Sentry environment. However, this is sadly a bit tricky, because up to now we forced users in this scenario to still use our Http instance and avoid adding their own (instead we allowed users to pass their Http instrumentation config to our Http integration). This means that if we'd simply stop adding our http instrumentation instance when tracing is disabled, these users would stop getting otel spans as well :/ so we sadly can't change this without a major.Instead, I re-introduced the
spans: false
forhttpIntegration({ spans: false })
. When this is set (which for now is opt-in, but probably should be opt-out in v9) we will only register SentryHttpInstrumentation, not HttpInstrumentation, thus not emitting any spans. Users can add their own instance of HttpInstrumentation if they care.One semi-related thing that I noticed while looking into this is that we incorrectly emitted node-fetch spans in errors-only mode. This apparently sneaked in when we migrated to the new undici instrumentation. I extracted this out into a dedicated PR too, but the changes are in this too because tests were a bit fucked up otherwise.
On top of #13765
WIP, making sure everything works etc...