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38 commits

Author SHA1 Message Date
Aliaksandr Valialkin
0224071ebe lib/promscrape/discovery/gce: allow empty project and zone for gce_sd_config 2020-04-27 11:45:02 +03:00
Aliaksandr Valialkin
6954d0edb7 lib/promscrape/discovery/gce: allow empty zone arg in gce_sd_config - in this case zones for the given project are automatically discovered 2020-04-26 14:34:11 +03:00
Aliaksandr Valialkin
7b8008e0bd lib/promscrape/discovery/gce: make golint happy by ignoring resp.Body.Close() result 2020-04-24 18:13:09 +03:00
Aliaksandr Valialkin
9ef5935552 lib/promscrape: initial implementation for gce_sd_configs aga Prometheus-compatible service discovery for Google Compute Engine 2020-04-24 17:51:22 +03:00
Aliaksandr Valialkin
24461153bf lib/promscrape: query /api/v1/namespaces/* for the configured namespaces in kubernetes_sd_config 
This should fix authroization issues described at https://github.com/VictoriaMetrics/VictoriaMetrics/issues/432
 2020-04-24 14:33:50 +03:00
Aliaksandr Valialkin
00e897119f lib/promscrape: add -promscrape.configCheckInterval command-line flag for automating config checking 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/431
 2020-04-23 23:41:08 +03:00
Aliaksandr Valialkin
a9a7a7175e lib/promscrape: access Config entries by reference, so they can be compared by addresses 2020-04-23 14:38:20 +03:00
Aliaksandr Valialkin
1c5d14a2eb lib/promscrape: move KubernetesSDConfig to lib/promscrape/discovery/kubernetes 2020-04-23 11:34:22 +03:00
Aliaksandr Valialkin
a714568374 lib/promscrape/discovery/kubernetes: hide role switch logic behind GetLabels function 2020-04-22 22:16:11 +03:00
Aliaksandr Valialkin
5454b518a6 lib/promscrape/discovery/kubernetes: reuse a client for empty api_server inside different jobs 2020-04-20 17:07:11 +03:00
Aliaksandr Valialkin
43375df923 lib/promscrape/discovery/kubernetes: update stale comments 2020-04-17 14:06:20 +03:00
Aliaksandr Valialkin
5d1537a395 lib/promscrape: suppress scrape errors if -promscrape.suppressScrapeErrors flag is set 2020-04-16 23:41:30 +03:00
Aliaksandr Valialkin
600490131f lib/promscrape: print all the labels for the target on error message for failed scrape 
This should improve debuggability.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/420
 2020-04-16 23:35:05 +03:00
Aliaksandr Valialkin
bd4c6d21dd lib/promscrape: retry target scraping when the target closes previously established keep-alive connection to it 
This should fix the following error:

the server closed connection before returning the first response byte. Make sure the server returns 'Connection: close' response header before closing the connection
 2020-04-16 23:25:29 +03:00
Aliaksandr Valialkin
426a0567c4 lib/promscrape: code cleanup in runScraper func 2020-04-15 11:36:24 +03:00
Aliaksandr Valialkin
067c7afebc lib/promscrape: show information on improperly configured scrape targets at the bottom of /targets page 
This is a common error whith improperly configured target autodiscovery and/or relabeling.
This error leads to duplicate scraping of the same targets with the same set of labels, which leads
to duplicate samples in time series.
 2020-04-14 14:55:05 +03:00
Aliaksandr Valialkin
ac35635b71 lib/promscrape/discovery/kubernetes: remove only unused client for API server during cleaning 2020-04-14 14:19:21 +03:00
Aliaksandr Valialkin
78863d7066 lib/promscrape: add promrelabel.GetLabelValueByName helper function 2020-04-14 14:12:01 +03:00
Aliaksandr Valialkin
c64f003cfb lib/promscrape: mention job name in error messages when target cannot be scraped 
This should improve debuggability
 2020-04-14 13:33:13 +03:00
Aliaksandr Valialkin
4718a5d951 lib/promscrape: reset ScrapeWork.ID in tests 2020-04-14 13:31:31 +03:00
Aliaksandr Valialkin
257521a634 lib/promscrape: properly expose statuses for targets with duplicate scrape urls at /targets page 
Previously targets with duplicate scrape urls were merged into a single line on the page.
Now each target with duplicate scrape url is displayed on a separate line.
 2020-04-14 13:10:01 +03:00
Aliaksandr Valialkin
6a75c95194 lib/promscrape: remove labels starting with __meta_ after applying relabel_configs as Prometheus does 
This should reduce CPU load during scraping when target discovery generates
big number of `__meta_*` labels (for instance, k8s discovery).

See https://www.robustperception.io/life-of-a-label for details.
 2020-04-14 12:23:22 +03:00
Aliaksandr Valialkin
01d7d799dc lib/promscrape: rename 'scrape_config->scrape_limit' to 'scrape_config->sample_limit' 
`scrape_config` block from Prometheus config contains `sample_limit` field,
while in `vmagent` this field was mistakenly named as `scrape_limit`.
 2020-04-14 11:59:57 +03:00
Aliaksandr Valialkin
2e4e202c2b lib/promscrape: add initial support for kubernetes_sd_config 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/334
 2020-04-13 21:03:28 +03:00
Aliaksandr Valialkin
2814b1490f lib/promscrape: add -promscrape.config.strictParse flag for detecting errors in -promscrape.config file 2020-04-13 13:15:44 +03:00
Aliaksandr Valialkin
90b4a6dd12 lib/promscrape: extract common auth code to lib/promauth 2020-04-13 12:59:10 +03:00
Aliaksandr Valialkin
3e55c7e069 lib/promscrape: reduce timestamp jitter when scraping targets 
This should improve compression for timestamps
 2020-04-01 16:11:35 +03:00
Aliaksandr Valialkin
499594f421 lib/promscrape: allow overriding external_labels as Prometheus does 
Prometheus docs at https://prometheus.io/docs/prometheus/latest/configuration/configuration/#scrape_config say:

> In communication with external systems, they are always applied only
> when a time series does not have a given label yet and are ignored otherwise.

Though this may result in consistency chaos when scrape targets override `external_labels`,
let's stick with Prometheus behavior for the sake of backwards compatibility.

There is last resort in vmagent with `-remoteWrite.label`, which consistently
sets the configured labels to all the metrics before sending them to remote storage.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/366
 2020-03-12 20:24:42 +02:00
Aliaksandr Valialkin
d4beb17ebe lib/promscrape: remove possible races when registering and de-registering scrape workers for /targets page 2020-03-11 16:30:21 +02:00
Aliaksandr Valialkin
cdf70b7944 lib/promscrape: consistently update /targets page after SIGHUP 2020-03-11 03:20:03 +02:00
Aliaksandr Valialkin
49d7cb1a3f all: fix golangci-lint issues 2020-03-10 19:41:46 +02:00
Aliaksandr Valialkin
7c432da788 lib/promscrape: do not retry idempotent requests when scraping targets 
This should prevent from the following unexpected side-effects of idempotent request retries:
- increased actual timeout when scraping the target comparing to the configured scrape_timeout
- increased load on the target

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/357
 2020-03-09 13:31:52 +02:00
Aliaksandr Valialkin
986dba5ab3 app/vmagent: do not allow non-supported fields in -remoteWrite.relabelConfig and file_sd_configs 
This should reduce possible confusion like in the https://github.com/VictoriaMetrics/VictoriaMetrics/issues/363
 2020-03-06 20:19:13 +02:00
Aliaksandr Valialkin
9a944fd169 lib/promscrape: consistency renaming: stopCh -> globalStopCh 2020-03-03 20:08:08 +02:00
Aliaksandr Valialkin
b63e4464f4 lib/promscrape: properly reload new configs on SIGHUP 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/335
 2020-02-26 13:54:00 +02:00
Aliaksandr Valialkin
6739c2749d lib/promscrape: go fmt 2020-02-25 20:56:44 +02:00
Aliaksandr Valialkin
7a33da8fea lib/promscrape: do not add missing port to __address__ label in order to be consistent with Prometheus behavior 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/331
 2020-02-25 20:49:50 +02:00
Aliaksandr Valialkin
04762344c6 app/vmagent: initial implementation for vmagent 2020-02-23 13:36:03 +02:00