When using varnishlog (4.0.1) on CentOS I notice its not grouping identical
ReqURL tags together. As far as I can tell this is related to the ReqURL tag of
ESI requests being (incorrectly?) associated with the top level request.
For instance here is a request to a page containing one ESI tag (varnish was
restarted to start with a clean cache)
$ varnishlog -g request -i "Begin,End,ReqURL,BereqURL,Link"
* << Request >> 2
- Begin req 1 rxreq
- ReqURL /?foo=3
- Link bereq 3 fetch
- Link req 4 esi
- ReqURL /esi/csstheme/
- ReqURL /esi/csstheme/
- End
** << BeReq >> 3
-- Begin bereq 2 fetch
-- BereqURL /?foo=3
-- End
** << Request >> 4
-- Begin req 2 esi
-- Link bereq 5 fetch
-- End
*** << BeReq >> 5
--- Begin bereq 4 fetch
--- BereqURL /esi/csstheme/
--- End
Notice the ESI request (Request 4) has no ReqURL tag. Instead 2 tags seems
(erroneously?) associated with top level request (Request 2). Here is what
varnishtop looks like after hitting the same URL a few times:
$ varnishtop -i ReqURL
10.01 ReqURL /esi/csstheme/
9.39 ReqURL /?foo=3
8.75 ReqURL /esi/csstheme/
Not sure why its not grouping /esi/csstheme/.
Here is my (very simple) VCL:
sub vcl_recv {
set req.backend_hint = cluster.backend();
set req.http.Surrogate-Capability = "varnish=ESI/1.0";
}
sub vcl_deliver {
}
sub vcl_backend_response {
if (beresp.http.Surrogate-Control ~ "ESI/1.0") {
unset beresp.http.Surrogate-Control;
set beresp.do_esi = true;
}
}
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