Marton Greber has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/24269 )

Change subject: KUDU-3690: Add filtering to /metrics_prometheus
......................................................................


Patch Set 6:

(2 comments)

http://gerrit.cloudera.org:8080/#/c/24269/6/src/kudu/server/default_path_handlers.cc
File src/kudu/server/default_path_handlers.cc:

http://gerrit.cloudera.org:8080/#/c/24269/6/src/kudu/server/default_path_handlers.cc@499
PS6, Line 499:    resp->status_code = HttpStatusCode::BadRequest;
             :     resp->output << "The 'attributes' parameter must be provided 
as key-value pairs "
             :                     "(i.e. an even number of values)";
> nit: Does it make sense to set Content-Type as well for clients as a standa
Content-Type is actually defined on the handler registration level already.
for json metrics:
webserver->RegisterJsonPathHandler("/metrics", "JSON Metrics", callback, 
is_on_nav_bar);
for prometheus metrics:
  webserver->RegisterPrerenderedPathHandler("/metrics_prometheus", "Prometheus 
Metrics", callback,
                                            StyleMode::UNSTYLED, is_on_nav_bar);

then handled in:
void Webserver::SendResponse(struct sq_connection* connection,
                             PrerenderedWebResponse* resp,
                             const WebRequest* req,
                             StyleMode mode) {

according to enum class StyleMode.

/metrics -> application/json
/metrics_prometheus -> text/plain


http://gerrit.cloudera.org:8080/#/c/24269/6/src/kudu/tserver/tablet_server-test.cc
File src/kudu/tserver/tablet_server-test.cc:

http://gerrit.cloudera.org:8080/#/c/24269/6/src/kudu/tserver/tablet_server-test.cc@4511
PS6, Line 4511: str
> Here and below: Would it make sense to have a sanity check (CheckPrometheus
Done



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I5c0b23ae5c184bf9e33e453736cef5e7ce8ee2e1
Gerrit-Change-Number: 24269
Gerrit-PatchSet: 6
Gerrit-Owner: Marton Greber <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Ashwani Raina <[email protected]>
Gerrit-Reviewer: Gabriella Lotz <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <[email protected]>
Gerrit-Reviewer: Yan-Daojiang <[email protected]>
Gerrit-Reviewer: Zoltan Chovan <[email protected]>
Gerrit-Reviewer: Zoltan Martonka <[email protected]>
Gerrit-Comment-Date: Tue, 12 May 2026 11:29:38 +0000
Gerrit-HasComments: Yes

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