1875776 - PoC: OpenTelemetry Rust based solution for exact tracing of failures

Status: RESOLVED WONTFIX

(Core :: MFBT, task, P3)

Comment 1

[Michael van Straten [:michael]]

Attachment: WIP: Bug 1875776 - New FFI crate for OTel based trace solution r=janv,jari

Comment 2

[Michael van Straten [:michael]]

Attachment: WIP: Bug 1875776 - Add simple gtests for OTel based trace solution r=janv,jari

Depends on D199216

Comment 3

[Jan Varga [:janv]]

This looks promising ;)

Comment 4

[Michael van Straten [:michael]]

One problem with the current tests is that the stdout lock gets ignored over FFI boundaries, which results in interleaved printing.

Comment 5

[Michael van Straten [:michael]]

Attachment: WIP: Bug 1875776 - Add span exporter demo using jaeger r=janv,jari

Depends on D199217

Comment 6

[Andrew Sutherland [:asuth] (he/him)]

An intriguing thing to demonstrate would be converting the traces to Firefox profiler profiles using markers. A recent demonstration of functionality like this is https://phabricator.services.mozilla.com/D187076 from bug 1850647 generating a firefox profile where there are markers and resource utilization information for the build process. For example, this working firefox profiler link comes from the "open in firefox profiler" button from this m-c build job.

This would probably make a lot of sense given that we're consolidating most tooling in spaces like this into the Firefox profiler and the jaeger trace UI (embedded) seems like it doesn't seem to have capabilities exceeding the profiler's there. (Note that obviously the issue of the data aggregation and searching/filtering/etc. is a separate issue. But for an individual user trace or synthesized aggregate trace, the Firefox profiler seems like a good UI that has an active developer base inside Mozilla, etc.)

Extra docs around the profiler format:

• https://github.com/firefox-devtools/profiler/blob/main/docs-developer/custom-importer.md
• https://github.com/firefox-devtools/profiler/blob/main/docs-developer/gecko-profile-format.md

Comment 7

[Michael van Straten [:michael]]

Attachment: WIP: Bug 1875776 - Vendor cargo dependencies for OTel based trace solution r=janv,jari

Comment 8

[Michael van Straten [:michael]]

Attachment: WIP: Bug 1875776 - Add glue for utilization of new FFI OTel trace crate r=janv,jari

Depends on D199216

Comment 9

[Michael van Straten [:michael]]

Attachment: WIP: Bug 1875776 - Vendor cargo dependencies for jaeger demo r=janv,jari

Depends on D199217

Comment 10

[Michael van Straten [:michael]]

Attachment: WIP: Bug 1875776 - Add cross thread propagation support to OTel based trace solution r=janv,jari

Depends on D199217