Add sampling info to Tracestate headers#858

Merged

mikker merged 11 commits intoelastic:masterfrom mikker:tracestate-sampling

Sep 1, 2020

+255-48

Commits on Sep 1, 2020

Update tracestate to accomodate es field
Mikkel Malmberg
committed
Set or propagate sample rate in tracestate
Mikkel Malmberg
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Add sample_rate to spans
Mikkel Malmberg
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Add sample_rate to traceparent init for convenience
Mikkel Malmberg
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Round es=s: to three decimals
Mikkel Malmberg
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Set sample_rate = 0 when unsampled
Mikkel Malmberg
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Don't put es= in empty tracestate header
Mikkel Malmberg
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Refactor and handle bad values
Mikkel Malmberg
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..
Mikkel Malmberg
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Update lib/elastic_apm/trace_context/tracestate.rb
Mikkel Malmberg
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Update changelog
Mikkel Malmberg
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