Kiu/VictoriaMetrics
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42 Commits

Author SHA1 Message Date
Aliaksandr Valialkin
e9f08b1e6a
lib/promscrape/discovery/kubernetes: do not pre-allocate memory for ScrapeWork objects 
There is high chance that ScrapeWork objects won't be generated because of relabeling
 2022-04-20 16:42:41 +03:00
Aliaksandr Valialkin
909a3ee0e4
lib/promscrape: follow-up after 91e290a8ff 2022-04-20 16:12:26 +03:00
Nikolay
429848a67d
lib/promscrape: reduce latency for k8s GetLabels (#2454) 
replaces internStringMap with sync.Map - it greatly reduces lock contention
concurently reload scrape work for api watcher - each object labels added by dedicated CPU

changes can be tested with following script https://gist.github.com/f41gh7/6f8f8d8719786aff1f18a85c23aebf70
 2022-04-20 16:12:25 +03:00
Aliaksandr Valialkin
d0bac8e224
all: typo fix: Kuberntes -> Kubernetes 2022-04-20 10:51:41 +03:00
Aliaksandr Valialkin
bc18368c15
lib/promscrape/discovery/kubernetes: add the ability to limit service discovery to the current namespace 
See https://github.com/prometheus/prometheus/issues/9782 and https://github.com/prometheus/prometheus/pull/9881
 2022-01-13 22:44:59 +02:00
Aliaksandr Valialkin
146c14d879 lib/promscrape/discovery/kubernetes: return back support role: endpointslices, since it is used by VictoriaMetrics operator 
This is a follow up commit after 31b42b30b6
 2021-08-29 12:37:36 +03:00
Aliaksandr Valialkin
ca61d7c82b lib/promscrape/discovery/kubernetes: rename role: endpointslices to role: endpointslice to be consistent with Prometheus 
See 2ec6c7dbb8/discovery/kubernetes/kubernetes.go (L99)
 2021-08-29 11:23:59 +03:00
Aliaksandr Valialkin
327034b54f lib/promscrape/discovery/kubernetes: use v1 API instead of v1beta1 API for role: ingress and role: endpointslices 
This should fix service discovery for these roles in Kubernetes v1.22 and newer versions.
See https://kubernetes.io/docs/reference/using-api/deprecation-guide/#ingress-v122

The corresponding change in Prometheus - https://github.com/prometheus/prometheus/pull/9205
 2021-08-29 11:23:58 +03:00
Aliaksandr Valialkin
110a888e39 lib/promscrape/discovery/kubernetes: make golangci-lint happy by removing empty branches 2021-05-20 12:00:17 +03:00
Aliaksandr Valialkin
9d97f44772 lib/promscrape/discovery/kubernetes: reload objects on object parse error 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240
 2021-05-18 23:27:24 +03:00
Aliaksandr Valialkin
c507faec0b lib/promscrape/discovery/kubernetes: simplify the reload logic for urlWatcher.objectsByKey 2021-05-18 15:41:51 +03:00
Aliaksandr Valialkin
0f54c0121b lib/promscrape/discovery/kubernetes: properly update vm_promscrape_discovery_kubernetes_scrape_works metric 
Previously it wasn't descreased during config update.
 2021-05-18 15:41:51 +03:00
Aliaksandr Valialkin
9f62d348db lib/promscrape/discovery/kubernetes: log errors and stop service discovery when unexpected updates are received from Kubernetes API server 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240
 2021-05-18 15:41:51 +03:00
Aliaksandr Valialkin
8764b0ae21 lib/promscrape/discovery/kubernetes: key ScrapeWork objects by urlWatcher instead of namespace 
This makes the code less fragile if urlWatcher would depend on additional to namepsace properties.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1170
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240
 2021-05-17 23:49:48 +03:00
Aliaksandr Valialkin
e08287f017 lib/promscrape: reload auth tokens from files every second 
Previously auth tokens were loaded at startup and couldn't be updated without vmagent restart.
Now there is no need in vmagent restart.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1297
 2021-05-14 20:03:35 +03:00
Aliaksandr Valialkin
a6cb4f10a7 app/{vmalert,vmauth}: explicitly set MaxIdleConnsPerHost in net/http.Client.Transport 
By default MaxIdleConnsPerHost is set to 2. This limits the possibility to re-use http keep-alive connections.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1300
 2021-05-14 18:13:34 +03:00
Aliaksandr Valialkin
027607db3e lib/promscrape/discovery/kubernetes: refresh endpoints and endpointslices scrape targets every 5 seconds, since they may depend on changed service and pod objects 
This should make endpoints and endpointslices scrape targets eventually consistent with the maximum delay of 5 seconds after the related service or pod object changes.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240
 2021-05-12 14:12:43 +03:00
Aliaksandr Valialkin
e6c19cb09d lib/promscrape/discovery/kubernetes: start watchers for pods and services before starting watchers for endpoints 
This should eliminate possible race when an update on endpoints depends on pods and/or services, which are missing in the cache yet.
This could result in missing targets based on endpoints or endpointslices.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240
 2021-05-05 12:23:16 +03:00
Aliaksandr Valialkin
421a92983a lib/promscrape/discovery/kubernetes: remove a mutex at urlWatcher - use groupWatcher mutex for accessing all the urlWatcher children 
This simplifies the code a bit and reduces the probability of improper mutex handling and deadlocks.
 2021-04-29 10:17:45 +03:00
Aliaksandr Valialkin
b3da457629 lib/promscrape/discovery/kubernetes: fix a deadlock introduced in eddba29664 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240

Thanks to @f41gh7 for providing the initial idea for deadlock fix at https://github.com/VictoriaMetrics/VictoriaMetrics/pull/1248
 2021-04-27 14:59:56 +03:00
Aliaksandr Valialkin
34321e5f8d lib/promscrape/discovery/kubernetes: refresh role: endpoints targets on service object removal as Prometheus does 
This is a follow-up for ae37cfd528

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240
 2021-04-23 20:27:29 +03:00
Aliaksandr Valialkin
db27dbab5e lib/promscrape/discovery/kubernetes: refresh endpoints and endpointslices targets on service object update like Prometheus does 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240
 2021-04-23 20:12:22 +03:00
Aliaksandr Valialkin
02b83e0957 lib/promscrape/discovery: remove superflouos check in registerPendingAPIWatchers 
The check `_, ok := uw.aws[aw]; !ok` isn't needed, since aw cannot exist in uw.aws
because of the check inside subscribeAPIWatcher
 2021-04-07 13:10:04 +03:00
Aliaksandr Valialkin
db56ee0e28 lib/promscrape/discovery/kubernetes: register pending apiWatchers in uw.aws 2021-04-06 11:11:53 +03:00
Lu Jiajing
4ee6def68b fix access to nil *url.URL (#1180) 
* fix access to nil *url.URL

Signed-off-by: Megrez Lu <lujiajing1126@gmail.com>

* Update lib/promscrape/discovery/kubernetes/api_watcher.go

Co-authored-by: Aliaksandr Valialkin <valyala@gmail.com>
 2021-04-05 22:26:43 +03:00
Aliaksandr Valialkin
7eca60694e lib/promscrape/discovery/kubernetes: reduce CPU time spent on registering big number of Kubernetes objects shared among big number of scrape jobs 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1182
 2021-04-05 22:05:02 +03:00
Aliaksandr Valialkin
9da2ef3d8f lib/promscrape/discovery/kubernetes: load objects missing in local cache from api seriver in getObjectByRole() 
This should fix possible race for `role: endpoints` and `role: endpointslices` service discovery,
when the referred `pod` and `service` objects aren't propagated to urlWatcher cache yet.

See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1182#issuecomment-813353359 for details.
 2021-04-05 20:31:22 +03:00
Aliaksandr Valialkin
fe084fdd33 lib/promscrape/discovery/kubernetes: synchronously load Kubernetes objects on first access 
Remove async registration of apiWatchers, since it breaks discovering `role: endpoints` and `role: endpointslices` targets,
which depend on pod and service objects.

There is no need in reloading `endpoints` and `endpointslices` targets if the referenced `pod` or `service` objects change,
since in this case the corresponding `endpoints` and `endpointslices` objects should also change because they contain
ResourceVersion of the referenced `pod` or `service` objects, which is modified on object update.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1182
 2021-04-05 14:37:07 +03:00
Aliaksandr Valialkin
245eba8896 lib/promscrape/discovery/kubernetes: properly track objects with the same names in multiple namespaces 
This is a follow-up for 12e4785fe8

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1170
 2021-04-02 14:46:34 +03:00
Aliaksandr Valialkin
eee860f83d lib/promscrape/discovery/kubernetes: properly discover targets in multiple namespaces 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1170
 2021-04-02 14:29:24 +03:00
Aliaksandr Valialkin
7d87d42a91 lib/promscrape/discovery/kubernetes: typo fix in error message 2021-03-26 12:46:33 +02:00
Aliaksandr Valialkin
a920e71809 lib/promscrape/discovery/kubernetes: properly handle too old resource version error message from Kubernetes watch API 2021-03-26 12:28:35 +02:00
Aliaksandr Valialkin
894246176f lib/promscrape/discovery/kubernetes: do not start object watcher until initial objects are loaded 2021-03-14 21:56:16 +02:00
Aliaksandr Valialkin
b0b28eeb93 lib/promscrape/discovery/kubernetes: further optimize kubernetes service discovery for the case with many scrape jobs 
Do not re-calculate labels per each scrape job - reuse them instead for scrape jobs with identical Kubernetes role
 2021-03-14 21:16:41 +02:00
Aliaksandr Valialkin
620f05cd2c lib/promscrape/discovery: fixes after 133b288681 
- Removed a deadlock in addAPIWatcher
- Do not create unused ScrapeWork objects
- Do not spend CPU resources on creating objectByKey map in addAPIWatcher

This work is based on https://github.com/VictoriaMetrics/VictoriaMetrics/pull/1125
 2021-03-13 15:22:38 +02:00
Aliaksandr Valialkin
8fc29ffc67 lib/promscrape/discovery/kubernetes: use a single watcher per apiURL 
Previously multiple scrape jobs could create multiple watchers for the same apiURL. Now only a single watcher is used.
This should reduce load on Kubernetes API server when many scrape job configs use Kubernetes service discovery.
 2021-03-11 17:04:14 +02:00
Aliaksandr Valialkin
41f641b132 lib/promscrape/discovery/kubernetes: localize Bookmark parsing code 
This is a follow-up for e772d1c920
 2021-03-11 13:08:56 +02:00
Aliaksandr Valialkin
6c9cd3f7c1 lib/promscrape/discovery/kubernetes: reduce load on Kubernetes API server by using watch bookmarks 
This allows continuing object watch from the last bookbark instead of reloading all the objects
on watch errors or timeouts.

See https://kubernetes.io/docs/reference/using-api/api-concepts/#watch-bookmarks
 2021-03-10 15:08:40 +02:00
Aliaksandr Valialkin
7b66c8cbf8 lib/promscrape/discovery/kubernetes: remove too verbose logs about starting and stopping the watchers 
Log the number of objects loaded per each watch url

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1113
 2021-03-09 15:07:12 +02:00
Aliaksandr Valialkin
c04505e585 lib/promscrape/discovery/kubernetes: reduce memory usage further when big number of scrape jobs are configured for the same kubernetes_sd_config role 
Serialize reloading per-role objects, so they don't occupy too much memory when objects for many scrape jobs are simultaneously refreshed.
Do not reload per-role objects if they were already refreshed by concurrent goroutines. This should reduce load on Kubernetes API server
when big number of scrape jobs are configured for the same Kubernetes role.

This is a follow-up for 17b87725ed

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1113
 2021-03-07 20:03:22 +02:00
Aliaksandr Valialkin
5807ff57f3 lib/promscrape/discovery/kubernetes: reduce memory usage when Kubernetes service discovery is configured on a big number of scrape jobs 
Previously vmagent was creating a separate Kubernetes object cache per each scrape job.
This could result in increased memory usage when monitoring a Kubernetes cluster with big number of objects (pods / nodes / services, etc.)
as seen at https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1113

Now it uses a shared map of scrape objects across multiple scrape jobs.
 2021-03-05 17:32:33 +02:00
Aliaksandr Valialkin
92ddb8f197 lib/promscrape/discovery/kubernetes: move apiWatcher code to a separate file 2021-03-05 17:32:32 +02:00