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2 Commits

Author SHA1 Message Date
Kazuyoshi Kato
cc59ae4d98 tracing: return (ctx, span) from StartSpan 
OpenTelemetry's Tracer#Start() returns (ctx, span). We have no reasons
to swap them.

Signed-off-by: Kazuyoshi Kato <katokazu@amazon.com>
 2022-01-29 00:41:21 +00:00
Kazuyoshi Kato
e751f1f44f tracing: support OTLP/HTTP in addition to gRPC 
This change adds OTLP/HTTP, specifically http/protobuf support.

http/protobuf is recommended in
https://github.com/open-telemetry/opentelemetry-specification/blob/v1.8.0/specification/protocol/exporter.md.

However kube-apiserver and CRI-O use gRPC, kubelet may support
gRPC in future. So we should support gRPC as well.

Signed-off-by: Kazuyoshi Kato <katokazu@amazon.com>
 2022-01-29 00:41:18 +00:00