The l5d-reqid header is used to provide applications with a
token that can be used in logging to correlate requests. We use
the _root_ span id so that this key can be used to correlate all
related requests (i.e. in log messages) across services and
linkerd instances.
The
l5d-reqid
header is used to provide applications with atoken that can be used in logging to correlate requests. We use the _root_ span id so that this key can be used to correlate all related requests (i.e. in log messages) across services and linkerd instances.