Thanks Reza and Guillaume. I didn't realize there was a way to set up callbacks on the VSM. I think either of the approaches will work for me.
On Mon, May 8, 2017 at 12:13 PM, Guillaume Quintard <[email protected]> wrote: > > That's the way to do it in a vmod, indeed. > > However Ryan, I don't get why you are reluctant to use the logs. By using > the c api, you can just define callbacks and get called everything a > request/transaction ends, so you don't need to read regularly. > -- > Guillaume Quintard > > > On May 8, 2017 17:45, "Reza Naghibi" <[email protected]> wrote: > > You can do this in a VMOD via PRIV_TASK: > > > -- > Reza Naghibi > Varnish Software > > On Fri, May 5, 2017 at 10:15 PM, Ryan Burn <[email protected]> wrote: >> >> Hello, >> From VCL, is it possible to execute code that runs after a request has >> been processed? >> >> I'm looking into writing a module that enables Varnish for distributed >> tracing using the OpenTracing project [opentracing.io]. This requires >> invoking code at the beginning of a request to start a span and insert >> tracing context into the request's headers and invoking code after a >> request's been processed to finish the span and measure how long it >> took to process. >> >> I recently did a similar project for nginx >> [github.com/rnburn/nginx-opentracing]. Nginx provides an >> NGX_HTTP_LOG_PHASE [www.nginxguts.com/2011/01/phases/] that allows you >> to set up handlers run after requests are serviced. Can anything >> equivalent be done using VCL? >> >> I image you could accomplish this by subscribing and regularly reading >> from Varnish's shared memory log, but I'd much rather do it directly >> if possible. >> >> Thanks, Ryan >> >> _______________________________________________ >> varnish-misc mailing list >> [email protected] >> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc > > > > _______________________________________________ > varnish-misc mailing list > [email protected] > https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc > > _______________________________________________ varnish-misc mailing list [email protected] https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
