Infer types in Prometheus remote_write #19944

ChrsMark · 2020-07-15T13:59:39Z

This PR add types for Prometheus metrics that are collected via remote_write metricset.
These metrics are in raw format when received so a heuristic approach is applied to extract types from metrics' name patterns.

Closes #17675.

TODOs

Implementation
Tests
Update docs

How to test this PR

Env setup

Use https://github.com/ChrsMark/docker-prometheus-playground for a ready to use prometheus env.
For remote write this config is needed: https://github.com/ChrsMark/docker-prometheus-playground/blob/master/prometheus/prometheus.yml#L10
If using a darwin machine the following should be enough:

remote_write:
- url: "http://host.docker.internal:9201/write"

On linux machines in order to access host from within the Prometheus container one can set network_mode: host in the docker-compose.yml and then host can be reach using 0.0.0.0.

Testing

Use oss version and test collector and remote_write (without types) metricsets for regressions.
Use basic version and test collector (with types) for regressions.
Use basic version and test that remote_write metricset:
a. uses types as expected.
b. can identify types based on input patterns: https://github.com/elastic/beats/pull/19944/files?file-filters%5B%5D=.asciidoc#diff-b69e84fad87eb2ae563115f43675a547R118

Signed-off-by: chrismark <chrismarkou92@gmail.com>

elasticmachine · 2020-07-17T14:22:09Z

Pinging @elastic/integrations-platforms (Team:Platforms)

ChrsMark · 2020-07-17T14:24:47Z

This one is ready for a first round of review. Implementation is complete along with unit tests to cover all the metrics processing chain from the heuristic approach of extracting types to grouping metrics with same labesets together.

Signed-off-by: chrismark <chrismarkou92@gmail.com>

x-pack/metricbeat/module/prometheus/remote_write/_meta/fields.yml

Signed-off-by: chrismark <chrismarkou92@gmail.com>

…e_write

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ChrsMark · 2020-07-22T12:20:31Z

jenkins run the tests please

…e_write

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ChrsMark · 2020-07-27T12:18:16Z

@exekias I did some cleanups and it looks like this is ready for a final review so feel free to hit it once you get the chance.

exekias

I like how things are looking, I left a few minor comments!

metricbeat/helper/prometheus/prometheus.go

x-pack/metricbeat/module/prometheus/remote_write/data.go

Signed-off-by: chrismark <chrismarkou92@gmail.com>

exekias

LGTM although lint errors are legit, please review

Signed-off-by: chrismark <chrismarkou92@gmail.com>

jsoriano

Nice feature and well documented 👍 I have added some small suggestions, nothing serious.

metricbeat/helper/prometheus/prometheus.go

metricbeat/module/prometheus/remote_write/_meta/docs.asciidoc

x-pack/metricbeat/module/prometheus/remote_write/data.go

jsoriano · 2020-07-28T16:48:10Z

metricbeat/module/prometheus/remote_write/_meta/docs.asciidoc

+. `_count` suffix: the metric is of Counter type
+. `_bucket` suffix and `le` in labels: the metric is of Histogram type
+
+Everything else is handled as a Gauge.


Just curious, is there a reason to default to gauge and not to counter?

Hmm, we check if a metric is a counter or a histogram and if not then we conclude that is a gauge. This is the "heuristic". If we fall-back to counters then we will not have a way to identify gauges.

Yeah, I meant if there was a reason to add a heuristic to detect counters and handle everything else as gauges and not the other way around. Maybe it is more difficult to find a heuristic to detect gauges 🤔

metricbeat/module/prometheus/remote_write/_meta/docs.asciidoc

x-pack/metricbeat/module/prometheus/remote_write/data.go

Signed-off-by: chrismark <chrismarkou92@gmail.com>

jsoriano

Thanks for addressing the comments!

jsoriano · 2020-07-29T09:15:50Z

metricbeat/module/prometheus/remote_write/_meta/docs.asciidoc

+. `_count` suffix: the metric is of Counter type
+. `_bucket` suffix and `le` in labels: the metric is of Histogram type
+
+Everything else is handled as a Gauge.


Yeah, I meant if there was a reason to add a heuristic to detect counters and handle everything else as gauges and not the other way around. Maybe it is more difficult to find a heuristic to detect gauges 🤔

jsoriano · 2020-07-29T09:19:18Z

x-pack/metricbeat/module/prometheus/remote_write/data.go

+const (
+	counterType   = "counter_type"
+	histogramType = "histgram_type"
+	otherType     = "other_type"


Oh ok, it is not only about gauges 👍 Should we mention in some place that summaries are handled as gauges?

Signed-off-by: chrismark <chrismarkou92@gmail.com>

ChrsMark · 2020-07-29T10:41:41Z

Thanks for the review @jsoriano!

Regarding #19944 (comment), it is easier to identify counters and histograms, gauge does not follow a specific pattern. This approach was also defined at #19944 (comment).

I also added a note in the docs about Summary handling 🍻 .

(cherry picked from commit b797a7e)

…ne-2.0 * upstream/master: (29 commits) Add an explicit system test for processes on unix systems (elastic#20320) [Autodiscovery] Ignore ErrInputNotFinished errors in autodiscover config checks (elastic#20305) [CI] Update README.md with CI references (elastic#20316) Add ECK doc links to Heartbeat docs (elastic#20284) [Filebeat] Add export tests to x-pack/filebeat (elastic#20156) feat(ci): support building docker images for PRs (elastic#20323) Update system tests dependency (elastic#20287) [Libbeat] Log debug message if the Kibana dashboard can not be imported from the archive (elastic#12211) (elastic#20150) [Filebeat][Gsuite] Transform all dates to timestamp with processor (elastic#20308) Infer types in Prometheus remote_write (elastic#19944) Remove unnecessary restarts of metricsets while using Node autodiscover (elastic#19974) docs: update changelog on master branch (elastic#20259) feat(ci): support storing artifacts for PRs in separate dirs (elastic#20282) [CI] Change upstream reference (elastic#20296) [Filebeat] Updates to Suricata module (elastic#20220) [docs] Fix Windows download link for agent (elastic#20258) [docs] Rename release highlights to what's new (elastic#20255) fix: update the display name of the multibranch job (elastic#20265) [Elastic Agent] Add basic protocol to control Elastic Agent. (elastic#20146) Cisco ASA: Fix message 106100 (elastic#20245) ...

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Infer types in remote_write

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Add unit tests for counter, gauge, summary metric types

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ChrsMark requested review from exekias and jsoriano July 17, 2020 14:21

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Add note about summary in the docs

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ChrsMark merged commit b797a7e into elastic:master Jul 29, 2020

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Infer types in Prometheus remote_write (elastic#19944)

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(cherry picked from commit b797a7e)

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Cherry-pick #19944 to 7.x: Infer types in Prometheus remote_write #20314

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Infer types in Prometheus remote_write (#19944) (#20314)

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ChrsMark mentioned this pull request Aug 11, 2020

Update Prometheus package to leverage types in remote write elastic/integrations#243

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Infer types in Prometheus remote_write (elastic#19944)

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Infer types in Prometheus remote_write #19944

Infer types in Prometheus remote_write #19944

ChrsMark commented Jul 15, 2020 •

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Infer types in Prometheus remote_write #19944

Infer types in Prometheus remote_write #19944

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ChrsMark commented Jul 15, 2020 • edited Loading

TODOs

How to test this PR

Env setup

Testing

elasticmachine commented Jul 17, 2020

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