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* Two new states will be added to the tcpstat collector called rx_queued_bytes and tx_queued_bytes.

For UDP datagrams an additional collector 'udp_queues' can be used to expose the total lengths of the tx_queue and rx_queue.
@SuperQ and @discordianfish this changes gives us the option to check for overloaded UDP + TCP processing.
The names of the new TCP states and the UDP metric can be discussed.
The current reasons are just:

I don't want to add another collector for the same exposed file, so I just added the new states to the tcpstat collector.
I chose the name 'udp_queue' instead of 'udpstat' as UDP has no state.
Signed-off-by: Peter Bueschel <peter.bueschel@logmein.com>

Signed-off-by: Ben Kochie <superq@gmail.com>

Signed-off-by: paulfantom <pawel@krupa.net.pl>

Fix sign error in `NodeClockSkewDetected`

Signed-off-by: beorn7 <beorn@grafana.com>

docs/node-mixin: alert on desynchronised clock

Signed-off-by: paulfantom <pawel@krupa.net.pl>

[node-mixin] Add missing coma in alerts

* Metrics for IO errors and retries on Mac.
Signed-off-by: Tom Wilkie <tom@grafana.com>

Signed-off-by: Neraud <neraud.login@gmail.com>

Signed-off-by: Povilas Versockas <p.versockas@gmail.com>

The `node_cpu_info` metric contains some information like the `model`
(which is an integer), but not the human readable model name. Also the
stepping of the processor might be interesting, since different stepping
of a processor might behave differently.
Signed-off-by: Benjamin Drung <benjamin.drung@cloud.ionos.com>

Bump procfs to latest release.

Fixes: https://github.com/prometheus/node_exporter/issues/1625
Fixes: https://github.com/prometheus/node_exporter/issues/1634Signed-off-by: Ben Kochie <superq@gmail.com>

Suppres error log noise if schedstat file doesn't exist.
Signed-off-by: Ben Kochie <superq@gmail.com>

* Make FS space alerts thresholds configurable (#1)

This makes it possible to tweak the thresholds for
the NodeFilesystemSpaceFillingUp alerts. Which
might be necessary in systems like Kubernetes,
where the image garbage collector runs at 85%,
so it's not a problem that the disk reaches that usage %.
Signed-off-by: iuri aranda <iuri@skyscrapers.eu>

* Enable golint in golangci-lint tests.
* Fix up minor linting issues.
Signed-off-by: Ben Kochie <superq@gmail.com>

Update CHANGELOG/VERSION for 1.0.0-rc.0 release.
* Add a note about new https settings to top-level README.
* Mark --web.config flag as experimental.
Signed-off-by: Ben Kochie <superq@gmail.com>

* Use `strconv.Itoa()` instead of `fmt.Sprintf()` for simple conversion.
* Eliminate copy-paste in collector setup.
Signed-off-by: Ben Kochie <superq@gmail.com>

* add a map of profilers to CPUids

`runtime.NumCPU()` returns the number of CPUs that the process can run
on. This number does not necessarily correlate to CPU ids if the
affinity mask of the process is set.

This change maintains the current behavior as default, but also allows
the user to specify a range of CPUids to use instead.

The CPU id is stored as the value of a map keyed on the profiler
object's address.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Signed-off-by: Daniel Hodges <hodges.daniel.scott@gmail.com>
Signed-off-by: Daniel Hodges <hodges@uber.com>
Co-authored-by: jdamato-fsly <55214354+jdamato-fsly@users.noreply.github.com>

* new flag to disable all default collectors
Signed-off-by: Paul Gier <pgier@redhat.com>
Co-authored-by: Ben Kochie <superq@gmail.com>

Many collectors depend on underlying features to be enabled. This causes
confusion about what "success" means. This changes the behavior of the
`node_scrape_collector_success` metric.

* When a collector is unable to find data don't return success.
* Catch the no data error and send to Debug log level to avoid log spam.
* Update collectors to support this new functionality.
* Fix copy-pasta mistake in infiband debug message.

Closes: https://github.com/prometheus/node_exporter/issues/1323Signed-off-by: Ben Kochie <superq@gmail.com>

* Add a changelog entry.
* Remove redundant swap free metric.
Signed-off-by: Ben Kochie <superq@gmail.com>

Signed-off-by: jonas <jonas.lindmark@denacode.se>

* Add procfs/btrfs to vendor folder
* Add Btrfs collector

Resolves #1100
Signed-off-by: Silke Hofstra <silke@slxh.eu>

Let the node exporter collect the non-numeric data from
/sys/class/infiniband: board ID, firmware version, and HCA type.
Signed-off-by: Benjamin Drung <benjamin.drung@cloud.ionos.com>
Co-authored-by: Ben Kochie <superq@gmail.com>

* Adds metrics for UDP receive and send buffer errors
Signed-off-by: Phil Porada <philporada@gmail.com>

Signed-off-by: Julian Kornberger <jk+github@digineo.de>

Reuse the Go-only implementation already in place for FreeBSD (#385) on
Darwin, DragonflyBSD, NetBSD and OpenBSD.

Tested on all affected platforms.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

Update all vendoring to current releases.
Signed-off-by: Ben Kochie <superq@gmail.com>

Bump to v0.0.10 procfs library.
Signed-off-by: Ben Kochie <superq@gmail.com>

This requires root, so it shouldn't be used.

This closes #1246
Signed-off-by: Johannes 'fish' Ziemke <github@freigeist.org>

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

Handle non-existent infiniband results silent.

Fixes: https://github.com/prometheus/node_exporter/issues/1511Signed-off-by: Ben Kochie <superq@gmail.com>

This exposes RAPL statistics from /sys/class/powercap.
Co-Authored-By: Ben Kochie <superq@gmail.com>
Signed-off-by: Ukri Niemimuukko <ukri.niemimuukko@intel.com>

* Add unix socket support for supervisord collector

For example:
  --collector.supervisord.url=unix:///var/run/supervisor.sock

Fixes prometheus/node_exporter#262
Signed-off-by: Paul Cameron <cameronpm@gmail.com>

Signed-off-by: Vitthal Bagal <vitthalb@us.ibm.com>

Signed-off-by: Peter Tribble <peter.tribble@gmail.com>
Co-authored-by: Ben Kochie <superq@gmail.com>