linkerd

Value Members

1. object DelayedRelease

   

2. object Headers

   

   The finagle http stack manages a set of context headers that are read from server requests and written to client requests.

   The finagle http stack manages a set of context headers that are read from server requests and written to client requests. The Headers module replaces these headers with linkerd-specific headers (prefixed by l5d-).

   Context headers, read and written by each linkerd instance, include:

   • l5d-ctx-deadline
   • l5d-ctx-dtab
   • l5d-ctx-trace

   Additionally, linkerd honors the following headers on incoming requests:

   • l5d-dtab: a client-specified delegation override
   • l5d-sample: a client-specified trace sample rate override

   In addition to the context headers, linkerd may emit the following headers on outgoing requests:

   • l5d-dst-logical: the logical name of the request as identified by linkerd
   • l5d-dst-concrete: the concrete client name after delegation
   • l5d-dst-residual: an optional residual path remaining after delegation
   • l5d-reqid: a token that may be used to correlate requests in a callgraph across services and linkerd instances

   And in addition to the context headers, lay may emit the following headers on outgoing responses:

   • l5d-err: indicates a linkerd-generated error. Error responses that do not have this header are application errors.

3. object HttpTraceInitializer

   

   Uses Headers.Ctx.Trace and Headers.Sample headers to propagate/control tracing.