Peer service computation

[jbertran]

What does this PR do?

Add peer service API for all spans of outgoing types, i.e. all client and producer spans.

Motivation

Introducing tags to provide the data necessary for a better service map with less fake services.

• peer.service: the new source of truth for the service map, computed from precursor tags
• _dd.peer.service.source: the name of the tag use to get the value of peer service

These tags are added:

• in service naming version v0 if the environment variable DD_TRACE_SPAN_PEER_SERVICE is set to a truthy value
• in all other service naming versions by default

Computing these uses the existing plugin hierarchy, with an optional peerServicePrecursors getter on classes which have more precursors than the default OTel/DDog out.host/net.peer.host tag.

This PR enables the computation of peer service for all ClientPlugin children, but not all of them have tests for peer service. This is because they (mostly databases) do not all have the correct precursors yet, or precursor sources need to be added - currently, only common tags are present, although the mechanism to add more tags is available.

Plugin Checklist

• Unit tests.

Additional Notes

[github-actions]

Overall package size

Self size: 4.36 MB
Deduped: 60.72 MB
No deduping: 60.76 MB

Dependency sizes

name	version	self size	total size
@datadog/pprof	2.2.1	14.24 MB	15.12 MB
@datadog/native-iast-taint-tracking	1.5.0	14.86 MB	14.86 MB
@datadog/native-appsec	3.2.0	13.38 MB	13.39 MB
protobufjs	7.1.2	2.76 MB	6.55 MB
@datadog/native-iast-rewriter	2.0.1	2.09 MB	2.1 MB
@opentelemetry/core	1.3.1	784.66 kB	1.37 MB
@datadog/native-metrics	2.0.0	898.77 kB	1.3 MB
@opentelemetry/api	1.4.1	780.32 kB	780.32 kB
opentracing	0.14.7	194.81 kB	194.81 kB
semver	7.3.8	88.2 kB	118.6 kB
@datadog/sketches-js	2.1.0	109.9 kB	109.9 kB
lodash.sortby	4.7.0	75.76 kB	75.76 kB
lru-cache	7.14.0	74.95 kB	74.95 kB
ipaddr.js	2.0.1	59.52 kB	59.52 kB
ignore	5.2.0	48.87 kB	48.87 kB
import-in-the-middle	1.3.5	34.34 kB	38.81 kB
istanbul-lib-coverage	3.2.0	29.34 kB	29.34 kB
retry	0.10.1	27.44 kB	27.44 kB
lodash.uniq	4.5.0	25.01 kB	25.01 kB
limiter	1.1.5	23.17 kB	23.17 kB
lodash.kebabcase	4.1.1	17.75 kB	17.75 kB
lodash.pick	4.4.0	16.33 kB	16.33 kB
node-abort-controller	3.0.1	14.33 kB	14.33 kB
crypto-randomuuid	1.0.0	11.18 kB	11.18 kB
diagnostics_channel	1.1.0	7.07 kB	7.07 kB
path-to-regexp	0.1.7	6.78 kB	6.78 kB
koalas	1.0.2	6.47 kB	6.47 kB
methods	1.1.2	5.29 kB	5.29 kB
module-details-from-path	1.0.3	4.47 kB	4.47 kB

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

[codecov]

Codecov Report

Merging #3177 (e901fdb) into master (d2b6d48) will decrease coverage by 0.09%.
The diff coverage is 57.14%.

@@            Coverage Diff             @@
##           master    #3177      +/-   ##
==========================================
- Coverage   86.02%   85.94%   -0.09%     
==========================================
  Files         194      194              
  Lines        7514     7534      +20     
  Branches       33       33              
==========================================
+ Hits         6464     6475      +11     
- Misses       1050     1059       +9     

Impacted Files	Coverage Δ
packages/dd-trace/src/constants.js	100.00% <ø> (ø)
packages/dd-trace/src/plugins/outbound.js	48.14% <50.00%> (-1.86%)	⬇️
packages/dd-trace/src/config.js	99.04% <100.00%> (+<0.01%)	⬆️
packages/dd-trace/src/opentracing/tracer.js	98.50% <100.00%> (+0.02%)	⬆️

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[pr-commenter]

Benchmarks

Comparing candidate commit e901fdb in PR branch jbertran/peer-service with baseline commit d2b6d48 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 389 metrics, 23 unstable metrics.