The module is intended to support distributed tracing in a pluggable way. The key/values of the headers added are generated from the module. They're used to support cross process tracing (http://opentracing.io/documentation/pages/api/cross-process-tracing.html) so that the performance information recorded by this module can be linked to the performance information reported by any other code that processes the request.
Since the specific headers values used to propagate the tracing context across processes vary by tracing system (for example zipkin uses B3 headers https://github.com/openzipkin/b3-propagation), jaeger uses headers like (uber-trace-id, uberctx-*, etc), I'd rather not have any of those details be exposed to the nginx configuration. Is there any way any way an arbitrary number of headers can be added without requiring the configuration writer to know anything about them? On Thu, Mar 29, 2018 at 2:34 PM, Robert Paprocki <rpapro...@fearnothingproductions.net> wrote: > Hello, > > On Thu, Mar 29, 2018 at 11:06 AM, Ryan Burn <rnickb...@gmail.com> wrote: >> >> >> This module injects multiple headers and the number, keys, etc aren't >> meant to be exposed to the user. >> >> (This module is mean to support tracing and the injected headers btw >> correspond to a SpanContext: >> http://opentracing.io/documentation/pages/api/cross-process-tracing.html >> which varies by the trace used). >> >> Is there way to accomplish this without having the configuration >> author do anything? > > > > What's the source of these header names/values? If it's passed from the > downstream client, it will automatically be proxied to the upstream server > (with some exceptions, see the proxy module documentation). > > If it's generated on the Nginx node itself, you should be able to use the > proxy_set_header Maxim defined above, in combination with variables which > could be generated via your custom module or some other approach. > > _______________________________________________ > nginx-devel mailing list > nginx-devel@nginx.org > http://mailman.nginx.org/mailman/listinfo/nginx-devel _______________________________________________ nginx-devel mailing list nginx-devel@nginx.org http://mailman.nginx.org/mailman/listinfo/nginx-devel