Commit Graph

51 Commits

Author SHA1 Message Date
beorn7 98eb6cbf7c promhttp: Correctly detect invalid metric and label names
Without this fix, the `InstrumentHandler...` middlewares get locked in
an endless loop in case of an invalid Collector, eating all the memory.

Signed-off-by: beorn7 <beorn@grafana.com>
2020-12-09 17:58:53 +01:00
beorn7 34ca120377 Be more explicit about the multi-line properties of MultiError
Signed-off-by: beorn7 <beorn@grafana.com>
2020-12-02 19:53:38 +01:00
Michael Vetter cf6dc82780 Correct spelling: possibilites -> possibilities
Signed-off-by: Michael Vetter <jubalh@iodoru.org>
2020-12-01 21:20:26 +01:00
RainbowMango af6ade7230 Fix unit test failing with Go1.14+
Signed-off-by: RainbowMango <renhongcai@huawei.com>
2020-04-23 15:14:34 +08:00
beorn7 586178b4ab Fix promhttp error handling
Essentially, just don't try to set a status code and send any error
message in the body once metrics gathering has succeeded. At that
point, the most likely reason for errors is anyway that the client has
disconnected, in which sending an error is moot. The other possible
reason for an error is a problem during metrics encoding. This is
unlikely to happen (it's a coding error here in client_golang in any
case), and if it is happening, the odds are we have already sent
something to the ResponseWriter, which means we cannot set a status
code anymore. The doc comment for HTTPErrorOnError now describes these
circumstances explicitly and recommends to set a logger to report that
kind of error.

This should fix the reason for the infamous `superfluous
response.WriteHeader call` message.

Signed-off-by: beorn7 <beorn@grafana.com>
2020-03-13 00:10:32 +01:00
beorn7 57d41259e1 Add exemplars to counter and histogram
Signed-off-by: beorn7 <beorn@grafana.com>
2020-01-24 17:12:08 +01:00
beorn7 ad58180fde Add WriteHeader call to Flush
Flush is another of the methods that will call WriteHeader if it
hasn't happened yet. Since we want to call observeWriteHeader (if
set), we need to do the WriteHeader call already here, similar to what
we have done in Write and ReadFrom.

This commit also adds comments explaining the above to not tempt
developers to remove the WriteHeader call.

Signed-off-by: beorn7 <beorn@grafana.com>
2019-08-19 18:19:23 +02:00
beorn7 4d8144c11a Add test for the new promhttp_metric_handler_errors_total metric
Signed-off-by: beorn7 <beorn@grafana.com>
2019-06-06 16:56:58 +02:00
beorn7 3fa9fca2cb Add an error counter for internal errors in the HTTP handler
The doc comments explain the rationale in a quite detailed way.

Fixes #543 and #542

Signed-off-by: beorn7 <beorn@grafana.com>
2019-06-05 20:07:49 +02:00
beorn7 bc54582c5e Make use of pre-existing context in InstrumentRoundTripperTrace
Fixes #580

Signed-off-by: beorn7 <bjoern@rabenste.in>
2019-05-16 17:52:19 +02:00
beorn7 6c520f6aca Add test to expose #580
Tests are heavily inspired by @shturec, see #584.

Signed-off-by: beorn7 <bjoern@rabenste.in>
2019-05-16 17:52:19 +02:00
Camilo Viecco facfcc21f8 fix regression issue 574
Signed-off-by: Camilo Viecco <camilo_viecco1@symantec.com>
2019-05-14 11:44:55 -07:00
Bjoern Rabenstein 57f7bd35fd Remove remaining traces of pre-go-1.8 handling
Signed-off-by: Bjoern Rabenstein <bjoern@rabenste.in>
2019-05-03 21:30:30 +02:00
Bjoern Rabenstein 1173d73405 Increase minimum required Go version to 1.9
This allows us to simplify a bunch of code while still supporting the
last four Go minor versions.

We have also run into minor annoyances a couple of times by now to
keep supporting 1.7 and 1.8.

It's time to pull the plug!

Signed-off-by: Bjoern Rabenstein <bjoern@rabenste.in>
2019-04-28 23:28:57 +02:00
Simon Pasquier 6894bb3c7c Add .golangci.yml
Signed-off-by: Simon Pasquier <spasquie@redhat.com>
2019-04-25 10:38:07 +02:00
Sergiusz Urbaniak 60728f445d prometheus/promhttp: actually observe values in trace in example
This is similar to
https://github.com/prometheus/client_golang/pull/535 fixing ExampleInstrumentRoundTripperDuration.

Signed-off-by: Sergiusz Urbaniak <sergiusz.urbaniak@gmail.com>
2019-03-06 13:59:53 +01:00
kklipsch a11607d7ae fix client trace examples to actually capture metrics
Signed-off-by: kklipsch <kklipsch@example.com>
2019-02-04 20:30:19 +00:00
beorn7 8785922956 Revert "Fix tests to adhere to the recent change in prometheus/common"
This reverts commit 2c9811f88e.

This is necessary because the changes in prometheus/common got reverted.

Signed-off-by: beorn7 <beorn@soundcloud.com>
2019-01-27 23:18:44 +01:00
beorn7 a006a7550a Remove unused constants and fields
Signed-off-by: beorn7 <beorn@soundcloud.com>
2018-12-24 11:22:57 +01:00
beorn7 2c9811f88e Fix tests to adhere to the recent change in prometheus/common
Signed-off-by: beorn7 <beorn@soundcloud.com>
2018-12-18 17:20:25 +01:00
beorn7 62361fc0fb Use streaming encoding of metrics
Signed-off-by: beorn7 <beorn@soundcloud.com>
2018-10-22 01:04:52 +02:00
glefloch c2c6fd2ab4 Fix PR comments
Signed-off-by: glefloch <glfloch@gmail.com>
2018-10-19 13:51:45 +02:00
glefloch fdf4cbc87b Use sync.Pool for gzipWriter
Signed-off-by: glefloch <glfloch@gmail.com>
2018-10-17 13:17:33 +02:00
Eric Daniels 2d0312e3dd
forgot some &s
Signed-off-by: Eric Daniels <eric@erdaniels.com>
2018-07-13 09:28:19 -04:00
Eric Daniels c02aadb406
remove references to delegators
Signed-off-by: Eric Daniels <eric@erdaniels.com>
2018-07-12 17:56:44 -04:00
Eric Daniels b3076e068e
Make delegators wrapping responseWriterDelegator have value receivers
Signed-off-by: Eric Daniels <eric@erdaniels.com>
2018-07-12 11:37:51 -04:00
Karsten Weiss d7590aab3c Fix three shadow variable warnings (govet -shadow)
Fixes:
http.go:118: declaration of "part" shadows declaration at http.go:117
http_test.go:50: declaration of "respBody" shadows declaration at http_test.go:25
promhttp/http.go:305: declaration of "part" shadows declaration at promhttp/http.go:304

Signed-off-by: Karsten Weiss <knweiss@gmail.com>
2018-04-13 23:25:14 +02:00
Karsten Weiss 958ea82988 Fix typos
Signed-off-by: Karsten Weiss <knweiss@gmail.com>
2018-04-13 23:23:52 +02:00
Luke Hanley f504d69aff promhttp: fix DNSDone should call Done, not Start (#395)
When tracing, it appears DNSDone is instead calling the supplied DNSStart function
2018-03-28 15:04:30 +02:00
Brian Brazil 02aee00fdb
Fix a typo 2018-02-14 11:10:46 +00:00
beorn7 c551c3c661 promhttp: Introduce limit for connections in flight and timeout 2018-02-09 17:05:10 +01:00
beorn7 8fd47d2e8f Provide an InstrumentedHandler
See https://github.com/prometheus/client_golang/issues/316 for details.
2018-02-08 16:27:51 +01:00
beorn7 e87046a87e Fix more interface upgrade bugs 2018-02-02 15:53:28 +01:00
beorn7 d892fd2b51 Add test to expose interface upgrade bug
In principle, we needed to iterate through all permutations, mirroring
the same that is happening in the code. For lack of time, I only
picked one of the cases currently buggy.

As said, this really needs code generation, should we ever find
ourselves touching this again.
2018-02-02 15:50:46 +01:00
Torin Sandall 44a8a1218c Fix delegator return value for single hijacker
Previously, the pickDelegator function was not returning a
*hijackerDelegator so the return value did not implement the Hijacker
interface. As a result, code that attempts to hijack the connection
would fail when using a type assertion.

All the other cases returned the hijackerDelegator correctly.
2018-02-01 10:57:42 -08:00
beorn7 f02bfc3484 Minor doc comment fix
This was forgotten to be included in the previous commit.
2018-01-11 16:59:30 +01:00
beorn7 9ac0bad606 Take into account curried labels in promhttp 2017-12-24 14:39:06 +01:00
beorn7 dd20712622 Allow currying of metric vec's
The idea behind it is described in detail in
https://github.com/prometheus/client_golang/issues/320 .

This commit also updates the example given in
promhttp/instrument_server_test.go , which nicely illustrates the
benefit of this change.

So far, currying could be emulated by creating different metric vec's
with different values in their ConstLabels. This was quite difficult
to grasp - which is essentially what was done in the example mentioned
above. Now that this use case can be solved without ConstLabels, we
can safely declare ConstLabels as rarely used. (Perhaps we can
deprecate them entirely one day, but I'll take a raincheck on that
when the changes of v0.10 have materialized.) This commit thus also
updates the ConstLabel doc comments in the various Opts. (It contained
fairly outdated stuff anyway.)
2017-12-22 15:56:11 +01:00
beorn7 2cb8df16e3 Fix error reporting bug
That's the same bug fixed in #342 (which is the deprecated code only
replicated in the `prometheus` package until v0.10 is out).
2017-08-31 15:10:58 +02:00
beorn7 e04de4bfe3 Document the use of Go1.9+ for monotonic time where applicable 2017-06-29 16:07:12 +02:00
beorn7 14730c70c0 promhttp: Bite the bullet and implement all 32 possible interface combos
As it turned out, it's not that esay to guess "common" combination of
interface upgrades. So I decided to just implement all 32 possible
combination of interface upgrades. (Only 16 with Go 1.7 and earlier.)

Clearly, this calls for code generation. But right now, we still need
to find out what's the best form of the code. For later additions,
implementing code generation might be useful.

Note that newDelegator is called for each HTTP request. Thus, this
commit aims to make the upgrade selection quick. (After the type
checks, it's just directly accessing an element in a slice.)
2017-06-02 19:03:08 +02:00
stuart nelson 2b3ab50dcd Add time to write header handler middleware (#304) 2017-05-29 11:42:43 +02:00
beorn7 023c31fd59 Fix handling of ConstLabels in checkLabels 2017-05-10 20:39:36 +02:00
beorn7 753a259e20 Improve promhttp tests
- Use local registry to avoid conflicts between tests.
- Expose https://github.com/prometheus/client_golang/issues/299 by
  using ConstLabels in a test.
- Improve example: Buckets and help string must be consistent, even
  if the former is not enforced as of now, but see
  https://github.com/prometheus/client_golang/issues/222
2017-05-10 19:49:36 +02:00
stuart nelson d300d5cf21 Instrument RoundTripper via middleware (#295)
Instrument RoundTripper via middleware
2017-05-09 18:46:09 +02:00
stuart nelson d01fd62222 new handler instrumentation (#285)
Add new HTTP handler instrumentation
2017-04-24 15:13:19 -04:00
beorn7 390e874a3f Fix doc comment typo 2016-08-15 15:54:18 +02:00
beorn7 a6321dd0b1 Create a "merge gatherer"
This allows to finally get rid of the infamous injection hook in the
interface. The old SetMetricFamilyInjectionHook still exist as a
deprecated function but is now implemented with the new plumbing under
the hood.

Now that we have multiple Gatherer implementation, I renamed
push.Registry to push.FromGatherer.

This commit also improves the consistency checks, which happened as a
byproduct of the refactoring to allow checking in both the "merge
gatherer" Gatherers as well as in the normal Registry.
2016-08-12 21:34:17 +02:00
beorn7 1dc03a72f6 Replace hashicorp/go-multierror by own implementation
The own implementation is much easier as it only has to serve our one
use case.
2016-08-04 16:03:06 +02:00
beorn7 f0c45acc50 Rename Deliver into Gather 2016-08-04 15:26:27 +02:00