feat: traceparent header sharness test

test/sharness/t0310-tracing.sh

@@ -13,6 +13,7 @@ test_init_ipfs
 export OTEL_TRACES_EXPORTER=otlp
 export OTEL_EXPORTER_OTLP_PROTOCOL=grpc
 export OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4317
+export OTEL_TRACES_SAMPLER=always_on
 
 cat <<EOF > collector-config.yaml
 receivers:

test/sharness/t0311-tracing-traceid.sh

@@ -0,0 +1,88 @@
+#!/usr/bin/env bash
+
+test_description="Test HTTP Gateway trace context propagation"
+
+. lib/test-lib.sh
+
+test_init_ipfs
+
+export OTEL_TRACES_EXPORTER=otlp
+export OTEL_EXPORTER_OTLP_PROTOCOL=grpc
+export OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4317
+export OTEL_TRACES_SAMPLER=always_on
+
+cat <<EOF > collector-config.yaml
+receivers:
+  otlp:
+    protocols:
+      grpc:
+processors:
+  batch:
+exporters:
+  file:
+    path: /traces/traces.json
+service:
+  pipelines:
+    traces:
+      receivers: [otlp]
+      processors: [batch]
+      exporters: [file]
+EOF
+
+# touch traces.json and give it 777 perms, in case docker runs as a different user
+rm -rf traces.json && touch traces.json && chmod 777 traces.json
+
+test_expect_success "run opentelemetry collector" '
+  docker run --rm -d -v "$PWD/collector-config.yaml":/config.yaml -v "$PWD":/traces --net=host --name=ipfs-test-otel-collector-t0311 otel/opentelemetry-collector-contrib:0.52.0 --config /config.yaml
+'
+
+test_launch_ipfs_daemon
+
+test_expect_success "Make a file to test with" '
+  echo "Hello Worlds!" >expected &&
+  HASH=$(ipfs add -q expected) ||
+  test_fsh cat daemon_err
+'
+
+# HTTP GET Request
+test_expect_success "GET to Gateway succeeds" '
+  curl -svX GET "http://127.0.0.1:$GWAY_PORT/ipfs/$HASH" >/dev/null 2>curl_output &&
+  cat curl_output
+'
+
+# GET Response from Gateway should contain no trace context headers
+test_expect_success "GET response for request without traceparent contains no trace context headers" '
+  grep "< traceparent: \*" curl_output && false || true
+'
+
+test_expect_success "Trace collector is writing traces" '
+  until cat traces.json | grep "\"traceId\"" >/dev/null; do sleep 0.1; done
+'
+
+version="00"
+trace_id="4bf92f3577b34da6a3ce929d0e0e4736"
+parent_id="00f067aa0ba902b7"
+flags="00"
+
+
+# HTTP GET Request with traceparent
+test_expect_success "GET to Gateway with traceparent header succeeds" '
+  curl -H "traceparent: $version-$trace_id-$parent_id-$flags" -svX GET "http://127.0.0.1:$GWAY_PORT/ipfs/$HASH" >/dev/null 2>curl_output &&
+  cat curl_output
+'
+
+test_expect_success "GET response for request with traceparent preserves trace id" '
+  grep "< Traceparent: $version-$trace_id-" curl_output
+'
+
+test_expect_success "Trace id is used in traces" '
+  until cat traces.json | grep "\"traceId\":\"$trace_id\"" >/dev/null; do sleep 0.1; done
+'
+
+test_kill_ipfs_daemon
+
+test_expect_success "kill docker container" '
+  docker kill ipfs-test-otel-collector-t0311
+'
+
+test_done