gist to send traceparent open telemetry from bash script headers

sendTracePost.sh

#!/usr/bin/env bash
# set -eox
# see spec: https://www.w3.org/TR/trace-context
# version-format = trace-id "-" parent-id "-" trace-flags
# trace-id = 32HEXDIGLC ; 16 bytes array identifier. All zeroes forbidden
# parent-id = 16HEXDIGLC ; 8 bytes array identifier. All zeroes forbidden
# trace-flags = 2HEXDIGLC ; 8 bit flags. Currently, only one bit is used. See below for detail
VERSION="00" # fixed in spec at 00
TRACE_ID="$(cat /dev/urandom | tr -dc 'a-f0-9' | fold -w 32 | head -n 1)"
PARENT_ID="00$(cat /dev/urandom | tr -dc 'a-f0-9' | fold -w 14 | head -n 1)"
TRACE_FLAG="01" # sampled
TRACE_PARENT="$VERSION-$TRACE_ID-$PARENT_ID-$TRACE_FLAG"
TRACE_STATE="mystate"
MESSAGE="Lorem ipsum $(cat /dev/urandom | tr -dc 'a-zA-Z' | fold -w 20 | head -n 1)"
URL="http://localhost:8080/messages"
echo "sending to host $URL"
echo "sending a trace-parent of: $TRACE_PARENT"

curl --location --request POST "${URL}" \
--header "traceparent: $TRACE_PARENT" \
--header "Content-Type: application/json" \
--data-raw "{\"message\":\"$MESSAGE\",\"traceparent\":\"$TRACE_PARENT\" }"%