github-mirrors/VictoriaMetrics
1
0
Fork 0
mirror of https://github.com/VictoriaMetrics/VictoriaMetrics.git synced 2024-11-21 14:44:00 +00:00
Code Issues Projects Releases Packages Wiki Activity
1443 commits 150 branches 748 tags 347 MiB
Commit graph

588 commits

Author SHA1 Message Date
Aliaksandr Valialkin
dbf8048134 app/vmrestore: document better that vmrestore works like rsync --delete, i.e. it deletes files in -storageDataPath, which are missing in the backup 2020-05-16 09:02:46 +03:00
Aliaksandr Valialkin
e544155a82 app/vmagent/Makefile: fix make run-vmagent rule 2020-05-15 19:35:16 +03:00
Aliaksandr Valialkin
6c43ba1cb1 app/vmagent/remotewrite: remove unused import after the commit 93267f143f 2020-05-15 17:42:31 +03:00
Aliaksandr Valialkin
1d71253653 app/vmagent/remotewrite: allow ingesting time series with multiple samples at once 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/481
 2020-05-15 17:37:27 +03:00
Aliaksandr Valialkin
a853869e75 app/vmstorage/transport: prevent from uncontrolled memory usage growth when vminsert sends big packets with too long labels 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/490
 2020-05-15 15:42:54 +03:00
Aliaksandr Valialkin
1e5c1d7eaa app/vmstorage: add vm_slow_metric_name_loads_total metric, which could be used as an indicator when more RAM is needed for improving query performance 2020-05-15 14:12:24 +03:00
Aliaksandr Valialkin
d6b9a49481 app/vmstorage: add vm_slow_row_inserts_total and vm_slow_per_day_index_inserts_total metrics for determining whether VictoriaMetrics required more RAM for the current number of active time series 2020-05-15 13:46:57 +03:00
Roman Khavronenko
e850bf0eff vmalert: fix the access to rules slice element by wrong index (#486) 
During group's update rules deletion was causing slice
mutations while slice index was assumed to be unchanged.
This caused "slice bounds out of range" errors when multiple
rules were deleted sequentially.
 2020-05-15 13:26:06 +03:00
hagen1778
d369450f27 vmalert: update README 2020-05-15 13:26:04 +03:00
Aliaksandr Valialkin
3845420a8f lib: extract common code for returning fast unix timestamp into lib/fasttime 2020-05-14 23:06:50 +03:00
Roman Khavronenko
e208e76222 vmalert: check if remoteRead object was initied before calling Restore (#473) 
The check for non-nil remoteRead was mistakenly dropped
during refactoring which caused panics when `vmalert`
wasn't configured with `remoteRead` flag.
 2020-05-13 22:57:26 +03:00
Roman Khavronenko
1523890742 vmalert: fix flag names and description in README (#475) 
Change also adds the recommendation for `remotewrite`
queue error.
 2020-05-13 22:57:20 +03:00
肖贝贝
8c3e9adf7f Feat/vmalert add max queue size (#472) 
* feat: add remoteWrite.maxQueueSize to reduce queue full
* rename remote(write|read) flags to remote(Write|Read) for the sake of consistency

Co-authored-by: xiaobeibei <xiaobeibei@bigo.sg>
 2020-05-13 22:57:16 +03:00
Aliaksandr Valialkin
bac9a684e8 docs/vmbackup.md: add a link to vmbackuper tool 2020-05-13 22:57:11 +03:00
Aliaksandr Valialkin
f3d9a5b0ec app/vmselect/promql: suppress "SA4006: this value of dstValues is never used" error in golangci-lint 2020-05-13 11:46:05 +03:00
Aliaksandr Valialkin
3b0f66a227 app/vmagent: fix a bug with improper relabeling when multiple -remoteWrite.urlRelableConfig args are set 
This bug could result in incorrect relabeling and metrics' drop.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/467
 2020-05-12 22:03:45 +03:00
Aliaksandr Valialkin
18a0caee43 app/vmselect/promql: fix any(..) calculations - return all the data points instead of the first one 2020-05-12 20:36:49 +03:00
Aliaksandr Valialkin
3d3f41b961 app/vmstorage/transport: fix panic during server stop on 32-bit arches 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/212
 2020-05-12 20:21:40 +03:00
Aliaksandr Valialkin
81b8811cf4 app/vmselect/promql: remove -search.maxPointsPerTimeseries command-line flag 
Limit the estimated time series count after aggregation with grouping by the number of source time series.
 2020-05-12 19:54:44 +03:00
Aliaksandr Valialkin
408ade27a9 app/vmselect/promql: add any(x) by (y) aggregate function, which returns any time series from q for each group y 2020-05-12 19:50:29 +03:00
Aliaksandr Valialkin
21c2982ac8 app/vmselect/promql: support for sum(x) by (y) limit N syntax in order to limit the number of output time series after aggregation 2020-05-12 19:50:12 +03:00
Aliaksandr Valialkin
f341c6fcc4 Revert "app/vmselect: add -search.estimatedSeriesCountAfterAggregation command-line flag for tuning the probability of OOMs or false-positive not enough memory errors" 
This reverts commit fbb7986dd2380fce2fc8633b7eda8b67f419e74c.

Reason for revert: this commit has been removed from single-node version
 2020-05-12 19:50:08 +03:00
Aliaksandr Valialkin
d54a93fc81 app/vmagent: fix scraping mTLS targets, which has been broken in v1.35.1 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/470
 2020-05-12 17:23:43 +03:00
Aliaksandr Valialkin
405cf44aed app/vmagent,lib/promscrape: do not set HostClient.DialDualStack, since it isnt used if HostClient.Dial is set 2020-05-12 15:24:53 +03:00
Aliaksandr Valialkin
da6a84e147 app/vmagent/remotewrite: properly dial TCP6 addresses set via -remoteWrite.url 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/469
 2020-05-12 15:24:50 +03:00
Aliaksandr Valialkin
4e237b4670 app/vminsert/influx: support passing AccountID and ProjectID via plain TCP and UDP 
Now `vminsert` accepts AccountID and ProjectID via `VictoriaMetrics_AccountID` and `VictoriaMetrics_ProjectID` tags
when reading Influx line protocol data via plain TCP or UDP (i.e. when `-influxListenAddr` is set).
 2020-05-12 13:13:04 +03:00
Aliaksandr Valialkin
f7753b1469 lib/storage: gradually pre-populate per-day inverted index for the next day 
This should prevent from CPU usage spikes at 00:00 UTC every day when
inverted index for new day must be quickly created for all the active time series.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/430
 2020-05-12 12:13:32 +03:00
Roman Khavronenko
0157566fdb vmalert: cleanup and restructure of code to improve maintainability (#471) 
The change introduces new entity `manager` which replaces
`watchdog`, decouples requestHandler and groups. Manager
supposed to control life cycle of groups, rules and
config reloads.

Groups export an ID method which returns a hash
from filename and group name. ID supposed to be unique
identifier across all loaded groups.

Some tests were added to improve coverage.

Bug with wrong annotation value if $value is used in
 templates after metrics being restored fixed.

Notifier interface was extended to accept context.

New set of metrics was introduced for config reload.
 2020-05-11 14:35:55 +03:00
Nikolay Khramchikhin
0e8c345ffb vmalert config reload 
added config hot reload for vmalert with sighup and api call
 2020-05-11 14:35:50 +03:00
Aliaksandr Valialkin
6646b380ef docs/vmauth.md: fix a link to docker images 2020-05-08 14:11:10 +03:00
Aliaksandr Valialkin
28ad350a31 app/vmagent: return 200 from /-/reload endpoint as Prometheus does 2020-05-07 19:29:48 +03:00
Aliaksandr Valialkin
3052b479b7 lib/httpserver: reduce typical duration for http server graceful shutdown 
Previously the duration for graceful shutdown for http server could take more than a minute
because of imporperly set timeouts in setNetworkTimeout.
Now typical duration for graceful shutdown should be reduced to less than 5 seconds.
 2020-05-07 14:16:38 +03:00
Aliaksandr Valialkin
dc04040781 docs/{vmagent,vmauth}: small clarifications in the docs 2020-05-07 12:55:06 +03:00
Aliaksandr Valialkin
2b403d3f42 app/vmauth: prevent from attacks with .. in path for accessing resources outside the configured url_prefix 2020-05-07 12:55:04 +03:00
Aliaksandr Valialkin
20538a2a5d app/vmagent: allow setting independent auth configs per each configured -remoteWrite.url 2020-05-06 16:52:32 +03:00
Aliaksandr Valialkin
12dbb9e22c app/vmagent: properly set client-side TLS certificates for -remoteWrite.url. Previously they were mistakenly set as server-side 2020-05-06 16:50:37 +03:00
Aliaksandr Valialkin
8665c2edb1 docs/vmagent.md: small fixes 2020-05-06 14:49:25 +03:00
Aliaksandr Valialkin
8ab5e47b5c lib/promscrape: add Prometheus-compatible DNS-based service discovery aka dns_sd_configs 2020-05-06 00:02:41 +03:00
Aliaksandr Valialkin
21b91599c2 docs/{vmauth,vmagent}: fix ports for profiling 2020-05-05 20:16:09 +03:00
Aliaksandr Valialkin
309700ab8c docs/vmauth.md: mention that we can help creating customized proxy 2020-05-05 12:34:08 +03:00
Aliaksandr Valialkin
20e958789a docs/{vmagent,vmauth}: add Profiling section 2020-05-05 11:45:29 +03:00
Aliaksandr Valialkin
1153f30fee docs: add vmauth.md 2020-05-05 11:17:45 +03:00
Aliaksandr Valialkin
782fb30cd0 app/vmauth: build fixes 2020-05-05 11:03:25 +03:00
Aliaksandr Valialkin
de31d16154 app/vmauth: add initial version of vmauth. See https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/app/vmauth/README.md for details 2020-05-05 10:56:20 +03:00
Aliaksandr Valialkin
61df59b9ea docs/vmagent.md: /targets page doesnt expose infomration about imporperly configured scrape configs now. It is written in error log instead 2020-05-05 10:56:18 +03:00
Roman Khavronenko
abce2b092f app/vmalert: restore alerts state from datasource metrics (#461) 
* app/vmalert: restore alerts state from datasource metrics

Vmalert will restore alerts state for rules that have `rule.For` > 0 from previously written timeseries via `remotewrite.url` flag.

* app/vmalert: mention remotewerite and remoteread configuration in README
 2020-05-05 00:52:19 +03:00
Aliaksandr Valialkin
89aa6dbf56 lib/promscrape: add Prometheus-compatible service discovery for Consul aka consul_sd_configs 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/330
 2020-05-04 20:53:06 +03:00
Aliaksandr Valialkin
b21b73115a app/vminsert: add /-/reload handler in the same way as for vmagent 2020-04-30 02:18:08 +03:00
DexterZhang
ae215e5538 feat(vmagent): add promscrap config reload suppport via http (#450) 
* feat(vmagent): add promscrap config reload suppport via http endpoint `/-/reload`

* fix: typo fix
 2020-04-30 02:18:01 +03:00
Artem Navoiev
121f7e1d56 Update README.md 2020-04-29 17:41:04 +03:00
Aliaksandr Valialkin
b6d88bac04 vendor: use github.com/VictoriaMetrics/fasthttp instead of github.com/fasthttp/fasthttp 
The upstream fasthttp may contain issues like 996610f021 ,
plus a code that isn't used by VictoriaMetrics. So let's use a private copy under our control instead.
 2020-04-29 16:43:09 +03:00
Aliaksandr Valialkin
9ed4951ec8 lib/metricsql: move it to a separate repository - github.com/VictoriaMetrics/metrics 2020-04-28 15:30:06 +03:00
Aliaksandr Valialkin
cd1145e5f4 app/vmselect: add -search.estimatedSeriesCountAfterAggregation command-line flag for tuning the probability of OOMs or false-positive not enough memory errors 2020-04-28 12:51:48 +03:00
Aliaksandr Valialkin
a858b7e393 app/vmalert: added missing comments for public entities 2020-04-28 11:19:48 +03:00
Aliaksandr Valialkin
716bbe79d4 app/vminsert/netstorage: increase timeout for waiting for ack message after sending big data block to vmstorage 2020-04-28 11:19:46 +03:00
Aliaksandr Valialkin
50af16baf2 app/vmalert: fix build 2020-04-28 00:34:01 +03:00
Aliaksandr Valialkin
e3db2c73a6 app/vmalert: sync with master branch 2020-04-28 00:19:42 +03:00
Aliaksandr Valialkin
7644f40763 app/vmalert: include it into the next release 2020-04-28 00:11:41 +03:00
Aliaksandr Valialkin
86a1d9cb0c lib/promscrape: add initial support for Prometheus-compatible service discovery for Amazon EC2 aka ec2_sd_configs 2020-04-27 19:29:22 +03:00
Aliaksandr Valialkin
0daa37fa02 lib/promscrape/discovery/gce: allow empty project and zone for gce_sd_config 2020-04-27 11:45:45 +03:00
Aliaksandr Valialkin
989d84cf3f app/{vminsert,vmstorage}: wait for ack from vmstorage after each packet sent to it from vminsert 
This should protect from possible data loss when `vmstorage` is stopped while the packet is sent from `vminsert`.

This commit switches to new protocol between vminsert and vmstorage, which is incompatible
with the previous protocol. So it is required that both vminsert and vmstorage nodes are updated.
 2020-04-27 09:53:26 +03:00
Aliaksandr Valialkin
e933cbac16 lib/storage: postpone reading data from blocks during search 
This eliminates the need for storing block data into temporary files on a single-node VictoriaMetrics
during heavy queries, which touch big number of time series over long time ranges.

This improves single-node VM performance on heavy queries by up to 2x.
 2020-04-27 08:44:01 +03:00
Aliaksandr Valialkin
23a310cc68 app/vmselect/netstorage: substitute sorting packedTimeseries with the natural order of the fetched blocks 
This should minimize the number of disk seeks when reading data from temporary file.
 2020-04-26 16:46:17 +03:00
Aliaksandr Valialkin
31861c5b8e 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 14:37:38 +03:00
Aliaksandr Valialkin
d9bdda408c docs/{vmbackup,vmrestore}.md: update -help output 2020-04-24 22:44:45 +03:00
Jason Gardner
7a6b2839b4 app/vmbackup: added ability to create and delete snapshots during backup (#428) 
* app/vmbackup: added ability to create and delete snapshots during backup

Resolves: https://github.com/VictoriaMetrics/VictoriaMetrics/issues/422

* Add snapshot create and delete url flags

* Fixed errcheck warnings in build
 2020-04-24 22:35:50 +03:00
Aliaksandr Valialkin
32b3f959fc app/vmselect: fix description for -search.resetCacheAuthKey 2020-04-24 19:44:35 +03:00
Aliaksandr Valialkin
069690e3bd lib/promscrape: initial implementation for gce_sd_configs aga Prometheus-compatible service discovery for Google Compute Engine 2020-04-24 17:53:43 +03:00
Aliaksandr Valialkin
f9526809e5 app/vmselect: add /api/v1/status/tsdb page with useful stats for locating root cause for high cardinality issues 
See https://prometheus.io/docs/prometheus/latest/querying/api/#tsdb-stats

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/425
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/268
 2020-04-22 22:03:23 +03:00
Aliaksandr Valialkin
b59f1f1504 app/vmselect: add -search.minStalenessInterval command-line flag for removing gaps on graphs built from time series with irregular duration between samples 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/426
 2020-04-20 19:42:41 +03:00
Aliaksandr Valialkin
603d4c9217 app/vmselect: merge -search.maxLookback and -search.maxStalenessInterval flags, since it has been appeared they have identical purpose :( 
Leave both flags for backwards compatibility reasons.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/209
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/426
 2020-04-20 19:28:28 +03:00
Aliaksandr Valialkin
db5fe03170 deployment/docker: allow building docker images on top of any base image set via ROOT_IMAGE environment var 
For example, the following command will build VictoriaMetrics docker image on top of alpine image:

    ROOT_IMAGE=alpine make package-victoria-metrics
 2020-04-20 01:16:21 +03:00
Aliaksandr Valialkin
1b911f6965 app/vmagent/remotewrite: retry sending data if the server closes keep-alive connection 
This should fix the following error when sending data to remote storage:

couldn't send a block with size XX bytes to "YYY": the server closed connection before returning the first response byte. Make sure the server returns 'Connection: close' response header before closing the connection
 2020-04-17 15:53:17 +03:00
Aliaksandr Valialkin
9105f72f17 docs/vmagent.md: typo fix: unvailable -> unavailable 2020-04-17 13:12:13 +03:00
Aliaksandr Valialkin
d46311fd93 app/vmagent/README.md: mention about prodmscrape.suppressScrapeErrors 2020-04-17 13:09:08 +03:00
Aliaksandr Valialkin
b9b5641c2f app/vmselect: properly apply -search.maxLookback to queries sent to /api/v1/query 2020-04-17 12:31:18 +03:00
Aliaksandr Valialkin
d4bc60d63c lib/logger: add WARN level for logging expected errors such as invalid user queries 2020-04-15 20:50:45 +03:00
Aliaksandr Valialkin
a873b553cf app/vmselect: handle timestamp(metric offset X) the same way as Prometheus does 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/415
 2020-04-15 12:01:05 +03:00
Aliaksandr Valialkin
6ec582acb9 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 14:55:13 +03:00
Aliaksandr Valialkin
755f649c72 docs/vmagent.md: mention that vmagent supports kubernetes_sd_configs now 2020-04-13 21:07:00 +03:00
Aliaksandr Valialkin
38256bd66d docs: update minimum supported Go version from 1.12 to 1.13 2020-04-07 13:39:15 +03:00
Aliaksandr Valialkin
2b4d3effad app/vmagent/remotewrite: add "X-Prometheus-Remote-Write-Version: 0.1.0" http header to remote_write request 
This header is required by Cortex (and, probably, other remote storage systems).
See 9c1f44d090/docs/apis.md (remote-api) .

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/399
 2020-04-04 16:24:47 +03:00
Aliaksandr Valialkin
87da127fbf app/victoria-metrics: remove accidentally added testdata for single-node VM 2020-04-04 16:09:08 +03:00
Aliaksandr Valialkin
a012f6fe70 app/vmselect/promql: keep metric name after applying first_over_time and last_over_time functions 2020-04-04 14:54:02 +03:00
Aliaksandr Valialkin
a53e332a93 app/vmstorage: add missing shutdown for http server on graceful shutdown 
This could result in the following panic during graceful shutdown when `/metrics` page is requested:

http: panic serving 10.101.66.5:57366: runtime error: invalid memory address or nil pointer dereference
goroutine 2050 [running]:
net/http.(*conn).serve.func1(0xc00ef22000)
	net/http/server.go:1772 +0x139
panic(0xa0fc00, 0xe91d80)
	runtime/panic.go:973 +0x3e3
github.com/VictoriaMetrics/VictoriaMetrics/lib/workingsetcache.(*Cache).UpdateStats(0x0, 0xc0000516c8)
	github.com/VictoriaMetrics/VictoriaMetrics/lib/workingsetcache/cache.go:224 +0x37
github.com/VictoriaMetrics/VictoriaMetrics/lib/storage.(*indexDB).UpdateMetrics(0xc00b931d00, 0xc02c41acf8)
	github.com/VictoriaMetrics/VictoriaMetrics/lib/storage/index_db.go:258 +0x9f
github.com/VictoriaMetrics/VictoriaMetrics/lib/storage.(*Storage).UpdateMetrics(0xc0000bc7e0, 0xc02c41ac00)
	github.com/VictoriaMetrics/VictoriaMetrics/lib/storage/storage.go:413 +0x4c5
main.registerStorageMetrics.func1(0x0)
	github.com/VictoriaMetrics/VictoriaMetrics/app/vmstorage/main.go:186 +0xd9
main.registerStorageMetrics.func3(0xc00008c380)
	github.com/VictoriaMetrics/VictoriaMetrics/app/vmstorage/main.go:196 +0x26
main.registerStorageMetrics.func7(0xc)
	github.com/VictoriaMetrics/VictoriaMetrics/app/vmstorage/main.go:211 +0x26
github.com/VictoriaMetrics/metrics.(*Gauge).marshalTo(0xc000010148, 0xaa407d, 0x20, 0xb50d60, 0xc005319890)
	github.com/VictoriaMetrics/metrics@v1.11.2/gauge.go:38 +0x3f
github.com/VictoriaMetrics/metrics.(*Set).WritePrometheus(0xc000084300, 0x7fd56809c940, 0xc005319860)
	github.com/VictoriaMetrics/metrics@v1.11.2/set.go:51 +0x1e1
github.com/VictoriaMetrics/metrics.WritePrometheus(0x7fd56809c940, 0xc005319860, 0xa16f01)
	github.com/VictoriaMetrics/metrics@v1.11.2/metrics.go:42 +0x41
github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver.writePrometheusMetrics(0x7fd56809c940, 0xc005319860)
	github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver/metrics.go:16 +0x44
github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver.handlerWrapper(0xb5a120, 0xc005319860, 0xc005018f00, 0xc00002cc90)
	github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver/httpserver.go:154 +0x58d
github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver.gzipHandler.func1(0xb5a120, 0xc005319860, 0xc005018f00)
	github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver/httpserver.go:119 +0x8e
net/http.HandlerFunc.ServeHTTP(0xc00002d110, 0xb5a660, 0xc0044141c0, 0xc005018f00)
	net/http/server.go:2012 +0x44
net/http.serverHandler.ServeHTTP(0xc004414000, 0xb5a660, 0xc0044141c0, 0xc005018f00)
	net/http/server.go:2807 +0xa3
net/http.(*conn).serve(0xc00ef22000, 0xb5bf60, 0xc010532080)
	net/http/server.go:1895 +0x86c
created by net/http.(*Server).Serve
	net/http/server.go:2933 +0x35c
 2020-04-02 21:09:55 +03:00
Aliaksandr Valialkin
3b744f3c32 app/vmstorage: typo fix 2020-04-01 23:43:09 +03:00
Aliaksandr Valialkin
f838cdc86e app/vmstorage: add vm_free_disk_space_bytes metric for monitoring the remaining disk space at -storageDataPath 2020-04-01 23:10:44 +03:00
Aliaksandr Valialkin
5270b7a097 app/victoria-metrics/testdata: add a test for https://github.com/VictoriaMetrics/VictoriaMetrics/issues/395 2020-03-31 12:51:46 +03:00
Aliaksandr Valialkin
d450249955 lib/storage: properly handle {label=~"foo|"} filters as Prometheus does 
Such filters must match all the time series with `label="foo"` plus all the time series without `label`

Previously only time series with `label="foo"` were matched.
 2020-03-30 20:21:47 +03:00
Aliaksandr Valialkin
c6cbc0bd19 app/vmselect/prometheus: allow passing relative time to start, end and time args of /api/v1/* queries 2020-03-29 21:56:52 +03:00
Aliaksandr Valialkin
cb8696699a app/vmselect/prometheus: code simplification: (d.Seconds()/1e3) -> d.Milliseconds() 2020-03-29 21:50:35 +03:00
Aliaksandr Valialkin
ceb6d1459f docs/vmagent.md: add prometheus remote_write proxy use case 2020-03-28 23:17:41 +02:00
Dmitry Naumov
b84071fc25
Rootless docker images by default (#358) 
* Rootless docker images by default

* Migrate to rootless base image

Co-authored-by: Aliaksandr Valialkin <valyala@gmail.com>
 2020-03-27 21:18:32 +02:00
Aliaksandr Valialkin
58cb7fc476 app/vmselect: adjust label_map() handling for corner cases 
The following corner cases now supported:
* label_map(q, "label", "", "foo") - adds `label="foo"` to series with missing `label`
* label_map(q, "label", "foo", "") - removes `label="foo"` from series

All the unmatched labels are kept unchanged.
 2020-03-13 18:41:52 +02:00
Aliaksandr Valialkin
0e7a71a245 app/vmselect: add label_map(q, label, srcValue1, dstValue1, ... srcValueN, dstValueN) function to MetricsQL 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/369
 2020-03-12 19:13:56 +02:00
Aliaksandr Valialkin
50555d89d3 app/vmselect: add -search.maxStalenessInterval for tuning Prometheus data model closer to Influx-style data model 2020-03-11 16:44:03 +02:00
Aliaksandr Valialkin
b46af9678e app/vmagent: mention that vmagent can filter data 2020-03-11 16:23:10 +02:00
Aliaksandr Valialkin
8939c19281 app/vmstorage: return 500 status code instead of 200 status code on internal errors inside /snapshot/* handlers 2020-03-10 23:54:27 +02:00
Aliaksandr Valialkin
f6410ff2bf app/vmselect: add optional max_rows_per_line query arg to /api/v1/export 
This arg allows limiting the number of data points that may be exported on a single line.
 2020-03-10 21:47:43 +02:00
Aliaksandr Valialkin
2f0a36044c app/{vmagent,vminsert}: add support for importing csv data via /api/v1/import/csv 2020-03-10 21:17:40 +02:00
Aliaksandr Valialkin
3fc6599aa2 app/vmagent: properly apply -remoteWrite.sendTimeout to fasthttp.HostClient 2020-03-09 13:31:22 +02:00
Aliaksandr Valialkin
47e986c26f app/vmagent: properly add labels set via -remoteWrite.label to metrics before sending them to -remoteWrite.url 2020-03-06 19:28:14 +02:00
Aliaksandr Valialkin
0d893eff36 Makefile: add build and test rules with enabled race detector. These rules have -race suffix 
Fix also `unsafe pointer conversion` errors detected by Go1.14. See https://golang.org/doc/go1.14#compiler .
 2020-03-05 12:05:16 +02:00
Aliaksandr Valialkin
0176fc4206 app/vmagent/README.md: small fixes 2020-03-04 18:15:24 +02:00
Aliaksandr Valialkin
ac03be5a2c app/vmagent/README.md: typo fix 2020-03-04 18:05:43 +02:00
Aliaksandr Valialkin
9354b9177a app/vmagent/README.md: clarification 2020-03-04 18:04:06 +02:00
Aliaksandr Valialkin
4302555228 app/vmagent/README.md: add iot and edge monitoring use case 2020-03-04 18:01:40 +02:00
Aliaksandr Valialkin
ea5904fd76 app/vmagent/README.md: add use cases section 2020-03-04 17:42:57 +02:00
Aliaksandr Valialkin
f01d1bf4a8 app/vmagent: add -remoteWrite.maxDiskUsagePerURL for limiting the maximum disk usage for each -remoteWrite.url buffer 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/352
 2020-03-03 19:49:20 +02:00
Aliaksandr Valialkin
808c17e250 app/vmagent/remotewrite: do not reset empty relabelCtx 2020-03-03 15:01:21 +02:00
Aliaksandr Valialkin
af19ca2483 app/vmagent: add -remoteWrite.urlRelabelConfig for applying individual relabeling for each -remoteWrite.url 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/320
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/308
 2020-03-03 13:13:06 +02:00
Aliaksandr Valialkin
d23df53ba2 app/vmselect/prometheus: do not add __name__!= filter when searching for all the matching metric names via /api/v1/label/__name__/values with non-empty label filter 
This should reduce query time.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/343
 2020-02-28 23:36:38 +02:00
Aliaksandr Valialkin
0eed71c7f4 app/vmagent/remotewrite: yet another typo fix 2020-02-28 20:07:00 +02:00
Aliaksandr Valialkin
6cdc97a53f app/vmagent/remotewrite: typo fix 2020-02-28 19:05:11 +02:00
Aliaksandr Valialkin
cc39c9d74b app/vmagent/remotewrite: limit memory usage when big scrape blocks are pushed to remote storage 2020-02-28 18:58:13 +02:00
Aliaksandr Valialkin
45d21d18a8 docs: add a doc for vmagent 2020-02-28 12:23:44 +02:00
Aliaksandr Valialkin
8fa1cd24d8 app/vmselect/prometheus: properly pass filter for labelName=__name__ in labelValuesWithMatches 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/343
 2020-02-28 12:17:30 +02:00
Aliaksandr Valialkin
cf9aee4ec3 all: properly split vm_deduplicated_samples_total among cluster components 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/345
 2020-02-27 23:47:51 +02:00
Aliaksandr Valialkin
1286cead75 app/vminsert: properly initialize InsertCtx 
This should prevent from panic described at https://github.com/VictoriaMetrics/VictoriaMetrics/issues/339
 2020-02-26 21:21:02 +02:00
Aliaksandr Valialkin
0597f1e39a app/vmagent: allow setting -httpListenAddr to empty string in order to disable listening for http requests 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/340
 2020-02-26 20:58:26 +02:00
Aliaksandr Valialkin
266101feb4 app/vmagent/README.md: list service discovery mechanisms, which will be added soon 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/334
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/330
 2020-02-26 19:28:19 +02:00
Aliaksandr Valialkin
c6c7843e93 app/vmagent: add -remoteWrite.maxBlockSize command-line flag for limiting the maximum size of unpacked block to send to remote storage 2020-02-25 19:58:11 +02:00
Aliaksandr Valialkin
c4194020ef app/vmagent: do not allow sending unpacked requests with sizes exceeding -maxInsertRequestSize 2020-02-25 19:35:43 +02:00
Aliaksandr Valialkin
2471340e0d app/vmagent: add ability to accept Influx line protocol data via TCP and UDP 
Just set `-influxListenAddr` command-line flag

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/333
 2020-02-25 19:18:01 +02:00
Aliaksandr Valialkin
f96fb93ca5 app/vmagent: add a counter for /targets handler calls 2020-02-25 18:17:25 +02:00
Aliaksandr Valialkin
25c570dae7 app/vmagent/README.md: mention that vmagent exposes target statuses at /targets page 2020-02-25 18:16:08 +02:00
Aliaksandr Valialkin
ca28a3e805 app/vmagent: logo fix 2020-02-25 00:09:55 +02:00
Aliaksandr Valialkin
777a39f7a1 app/vmagent: update docs 2020-02-25 00:09:53 +02:00
Aliaksandr Valialkin
61e67b8922 app/vmagent/README.md: small fixes 2020-02-24 21:26:12 +02:00
Aliaksandr Valialkin
6ca1e58d98 app/vmselect/promql: properly take into account the first datapoint when calculating rollup_candlestick 2020-02-24 13:25:07 +02:00
Aliaksandr Valialkin
b58e3fc8a9 app/vmselect/promql: do not take into account values outside the current window in rollup_candlestick 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/309
 2020-02-23 18:06:26 +02:00
Yaroslav
c69d4b01f0 fix rollupOpen(), rollupHigh(), rollupLow() functions (#328) 2020-02-23 18:06:25 +02:00
Aliaksandr Valialkin
7ee7614e90 app/vmagent: initial implementation for vmagent 2020-02-23 17:31:54 +02:00
Aliaksandr Valialkin
f22aefdb16 app/vmselect/promql: log when rollupResult cache is cleared 2020-02-21 20:06:53 +02:00
Aliaksandr Valialkin
d5c2a0ce64 app/vmselect: add -search.cacheTimestampOffset command-line flag 
This flag can be used for removing gaps on graphs if the difference between the current time
and the timestamps from the ingested data exceeds 5 minutes.

This is the case when the time between data sources and VictoriaMetrics is improperly synchronized.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/312
 2020-02-21 14:02:15 +02:00
Aliaksandr Valialkin
c70822db50 app/vmselect: add /internl/resetRollupResultCache handler for resetting response cache 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/312
 2020-02-21 14:02:12 +02:00
Aliaksandr Valialkin
afecb34491 app/vmstorage: limit the maximum error message size before sending it to client 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/315
 2020-02-13 17:33:12 +02:00
Aliaksandr Valialkin
846d7fa7e9 app/vmselect: add sort_by_label(q, label) and sort_by_label_desc(q, label) functions 
This is implementation of https://github.com/prometheus/prometheus/pull/1533 for VictoriaMetrics.
 2020-02-13 17:01:50 +02:00
Aliaksandr Valialkin
347aaba79d lib/{storage,mergeset}: use time.Ticker instead of time.Timer where appropriate 
It has been appeared that time.Timer was used in places where time.Ticker must be used instead.
This could result in blocked goroutines as in the https://github.com/VictoriaMetrics/VictoriaMetrics/issues/316 .
 2020-02-13 13:21:48 +02:00
Aliaksandr Valialkin
6e0013ca39
app/vmselect/prometheus: typo fix in -latencyOffset description 2020-02-12 14:00:38 +02:00
Edouard Hur
e8f92a4ee8
Cluster - prometheus metrics fix (#314) 
* add missing '/{}' in prom query range requests

* fix missing leading '/' on prom lavelValuesErrors path
 2020-02-10 22:15:21 +02:00
Aliaksandr Valialkin
1010a57882 all: allow setting flags via environment vars 
Now flags can be set via environment vars with the same names as flags.
Command-line flags override flags set via env vars.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/311
 2020-02-10 13:31:21 +02:00
Aliaksandr Valialkin
ea66212c93 lib/storage: move -dedup.minScrapeInterval flag outside lib/storage, so it doesnt show up in vminsert in cluster version 2020-02-10 13:07:25 +02:00
Aliaksandr Valialkin
e6d9ea3094 app/vmselect/promql: do not add step to range end, since this hack became obsolete since commit 9e1119dab8 2020-02-05 21:23:44 +02:00
Aliaksandr Valialkin
4a1de7fee9 app/vmselect/promql: properly adjust time range for data to select 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/309
 2020-02-05 21:23:43 +02:00
Aliaksandr Valialkin
8e77b54846 app/vmselect: unconditionally offset -step to rollup_candlestick. This makes results more consistent 2020-02-04 23:31:47 +02:00
Aliaksandr Valialkin
ce38b176bc app/vmselect/promql: automatically apply offset -step to rollup_candlestick function in order to obtain the expected OHLC results 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/309
 2020-02-04 23:24:04 +02:00
Aliaksandr Valialkin
4f7116d1ee app/vmselect/promql: adjust rollup_candlestick calculations to the exepcted results 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/309
 2020-02-04 22:43:28 +02:00
Aliaksandr Valialkin
ccd3aa4f15 app/vmselect: take into account the time the requests wait in the queue if -search.maxConcurrentRequests is exceeded 
This will prevent from excess CPU usage for timed out queries.
 2020-02-04 16:20:48 +02:00
Aliaksandr Valialkin
e6bf88a4d4 app/vmselect: add a placeholder for /api/v1/metadata, which could be requested by Grafana 
See https://prometheus.io/docs/prometheus/latest/querying/api/#querying-metric-metadata

VictoriaMetrics doesn't collect any metadata for metrics, so just return empty response.
 2020-02-04 15:56:01 +02:00
Aliaksandr Valialkin
7cde594696 all: do not clash flag description with back-quoted flag types 
See https://golang.org/pkg/flag/#PrintDefaults for more details.
 2020-02-04 15:56:01 +02:00
Aliaksandr Valialkin
45bc6c62f2 app/vmselect/promql: adjust and and unless binary operator handling to be consistent with Prometheus 2020-01-31 18:52:51 +02:00
Aliaksandr Valialkin
e3adc095bd all: add -dedup.minScrapeInterval command-line flag for data de-duplication 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/86
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/278
 2020-01-31 01:18:54 +02:00
Aliaksandr Valialkin
cb5c39ee70 lib/fs: optimize small reads for ReaderAt.MustReadAt by reading from memory-mapped space instead of reading from file descriptor 
This should improve performance when reading many small blocks.
 2020-01-30 15:16:16 +02:00
Aliaksandr Valialkin
4ed5e9a7ce lib/storage: pre-fetch metricNames for the found metricIDs in Search.Init 
This should speed up Search.NextMetricBlock loop for big number of found time series.
 2020-01-30 15:16:16 +02:00
Aliaksandr Valialkin
170c1c3a4e app/vmselect/promql: add keep_next_value(q) for filling gaps with the next non-empty value 2020-01-29 00:48:14 +02:00
Aliaksandr Valialkin
a9c1d5b351 app/vminsert: moved -maxInsertRequestSize command-line flag out of lib/prompb in order to prevent its inclusion in vmselect and vmstorage apps 2020-01-28 22:53:50 +02:00
Aliaksandr Valialkin
b28c9a3944 app/vmselect/promql: return expected results from increase() over the beginning of time series, which start from big value 
Examples for such counters: OS-level counters for network or cpu stats.
 2020-01-28 16:31:05 +02:00
Aliaksandr Valialkin
3e304890a6 app/vmselect/promql: fix panic on a single zero vmrange bucket in prometheus_buckets() function 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/296
 2020-01-27 18:05:12 +02:00
Aliaksandr Valialkin
4d70a81e18 app/vminsert: do not drop pending rows if all the vmstorage backends are unavailable 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/294
 2020-01-24 22:10:10 +02:00
Aliaksandr Valialkin
0cda6afa8e app/vminsert: move ingestion protocol parsers to lib/protoparser, so they could be re-used in the upcoming vmagent 2020-01-24 16:55:18 +02:00
Aliaksandr Valialkin
ea53a21b02 all: consistently log durations in seconds with millisecond precision 
This should improve logs readability
 2020-01-22 18:35:24 +02:00
Aliaksandr Valialkin
e1a264173a app/vmselect: mention the original query and time range in error messages 
This should simplify debugging invalid or heavy queries.
 2020-01-22 17:34:35 +02:00
Aliaksandr Valialkin
e127173984 app/vmselect: mention command-line flag, which could be used for adjusting query timeouts, in timeout errors 2020-01-22 15:53:42 +02:00
Aliaksandr Valialkin
f3b9f8b823 app/vmselect/prometheus: increase default value -maxExportDuration to 30 days, since 10 minutes beat users exporting bit amounts of data 2020-01-22 15:53:41 +02:00
Aliaksandr Valialkin
40e564eb9c app/vmselect/promql: add range_over_time(m[d]) function for calculating value range for m over d 2020-01-21 19:05:29 +02:00
Aliaksandr Valialkin
ecddba30fe app/vminsert/netstorage: increase timeout for pushing data from vminsert to vmstorage by 3x 
Our clients report that the previous timeout could lead to frequent errors when
vmstorage starts background merge for big parts on slow HDD.
 2020-01-21 18:21:49 +02:00
Aliaksandr Valialkin
9eaa2ab871 app/vmselect/promql: add label_match(q, label, regexp) and label_mismatch(q, label, regexp) functions for filtering out time series with labels matching the given regexp 2020-01-21 15:00:35 +02:00
Aliaksandr Valialkin
cbd0452317 app/vminsert: increase default value for -insert.maxQueueDuration from 30s to 60s 
This should help catching up with high ingestion rate after VictoriaMetrics restart.
 2020-01-18 14:39:30 +02:00
Aliaksandr Valialkin
2084921e64 all: use github.com/klauspost/compress/gzip instead of compress/gzip 
`github.com/klauspost/compress/gzip` is more optimized than `compress/gzip`.
This gives better gzip compression and decompression speeds.
 2020-01-17 23:59:17 +02:00
Aliaksandr Valialkin
54db08a60f app/vmselect/netstorage: make fmt 2020-01-17 17:46:20 +02:00
Aliaksandr Valialkin
d21cc2d16a app/vmselect/netstorage: limit the maximum size for in-memory buffer for temporary blocks file 
This should reduce memory usage on systems with more than 8GB RAM.
 2020-01-17 16:28:28 +02:00
Aliaksandr Valialkin
b05f6cf11c app/vmselect: limit the default value for -search.maxConcurrentRequests, so it plays well on systems with more than 16 vCPUs 
A single heavy request can saturate all the available CPUs, so let's limit the number of concurrent requests to lower value.
This will give more chances for executing insert path.
 2020-01-17 16:16:43 +02:00
Aliaksandr Valialkin
a9f683423c app/{vminsert,vmselect}: improve error messages when VictoriaMetrics cannot handle too high number of concurrent inserts / selects 2020-01-17 16:16:43 +02:00
Aliaksandr Valialkin
4b16b7fd11 all: mention command-line flags used for limiting the incoming request size in error messages 
This should improve error logs usability.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/287
 2020-01-16 13:06:43 +02:00
Aliaksandr Valialkin
ce0b602405 app/vmselect/promql: fix panic on sum(aggr_over_time(...)) with incorrect number of args 2020-01-15 16:26:16 +02:00
Aliaksandr Valialkin
bcd3f0c5bd app/vmselect/promql: add hoeffding_bound_upper(phi, m[d]) and hoeffding_bound_lower(phi, m[d]) functions 
These functions can be used for calculating Hoeffding bounds
for `m` over `d` time range and for the given `phi` in the range `[0..1]`.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/283
 2020-01-11 14:47:13 +02:00
Aliaksandr Valialkin
fc01b11ddc app/vmselect/promql: return continuous values for min_over_time and max_over_time when step is smaller than scrape_interval 2020-01-11 12:47:57 +02:00
Aliaksandr Valialkin
16fb128bbc app/vmselect/promql: do not take into account the previous point before time window in square brackets for min_over_time, max_over_time, rollup_first and rollup_last functions 
This makes the behaviour for these functions similar to Prometheus when processing broken time series with irregular data points
like `gitlab_runner_jobs`. See https://gitlab.com/gitlab-org/gitlab-exporter/issues/50 for details.
 2020-01-11 00:26:11 +02:00
Aliaksandr Valialkin
1c445bf7eb vendor: update github.com/valyala/fastjson from v1.4.2 to v1.4.5 
This should fix parsing Inf values in `/api/v1/import`. The previous attempt to fix this in VictoriaMetrics v1.32.1 was unsuccessful.
 2020-01-10 23:14:34 +02:00
Aliaksandr Valialkin
adc36d00b7 app/vmselect/promql: properly handle aggr(aggr_over_time(...)) 2020-01-10 21:57:11 +02:00
Aliaksandr Valialkin
87a106702b app/vmselect/promql: add aggr_over_time(("aggr_func1", "aggr_func2", ...), m[d]) function 
This function can be used for simultaneous calculating of multiple `aggr_func*` functions
that accept range vector. For example, `aggr_over_time(("min_over_time", "max_over_time"), m[d])`
would calculate `min_over_time` and `max_over_time` for `m[d]`.
 2020-01-10 21:18:12 +02:00
Aliaksandr Valialkin
c314d9a219 app/vmselect/promql: add tmin_over_time(m[d]) and tmax_over_time(m[d]) functions 
These functions return timestamp in seconds for the minimum and maximum value for `m` over time range `d`
 2020-01-10 19:39:34 +02:00
Aliaksandr Valialkin
705af61587 app/{vmbackup,vmrestore}: add backup complete file to backup when it is complete and check for this file before restoring from backup 
This should prevent from restoring from incomplete backups.

Add `-skipBackupCompleteCheck` command-line flag to `vmrestore` in order to be able restoring from old backups without `backup complete` file.
 2020-01-09 15:35:45 +02:00
Aliaksandr Valialkin
7c6df1e51d app/vmselect/promql: skip rate calculation for the first point on time series 2020-01-08 14:42:44 +02:00
Aliaksandr Valialkin
76707b2ab9 app/vmselect/promql: fix calculations for histogram_share 2020-01-04 14:44:15 +02:00
Aliaksandr Valialkin
accad01b3e app/vmselect/promql: add missing MetricName into netstorage.Result in tests 2020-01-04 12:53:14 +02:00
Aliaksandr Valialkin
6f29d37cb5 app/vmselect/promql: add histogram_share(le, buckets) function 2020-01-04 12:53:08 +02:00
Aliaksandr Valialkin
2290503140 app/vmselect/promql: add absent_over_time(m[d]) func similar to the function in Prometheus 2.16 
See https://github.com/prometheus/prometheus/issues/2882
 2020-01-04 12:53:01 +02:00
Aliaksandr Valialkin
67f94bbe12 app/vmselect/promql: add histogram_over_time(m[d]) rollup function 2020-01-04 12:52:56 +02:00
Aliaksandr Valialkin
9a1f6848ca app/vmselect/promql: fix results caching for multi-arg rollup functions such as quantile_over_time 
Previosly only a single arg was taken into account, so caching didn't work properly for multi-arg rollup funcs.
 2020-01-03 20:44:54 +02:00
Aliaksandr Valialkin
3d0c7b095a app/vmselect/promql: use scrapeInterval instead of window in denominator when calculating rate for the first point on the time series 
This should provide better estimation for `rate` in the beginning of time series.
 2020-01-03 19:03:32 +02:00
Aliaksandr Valialkin
6ea7f23446 app/vmselect/promql: increase the estimated number of time series returned by aggr() by (something) from 100 to 1K, since 100 may result in OOM for high number of time series 2020-01-03 01:02:30 +02:00
Aliaksandr Valialkin
e0abf45d45 app/vmselect/promql: add share_le_over_time and share_gt_over_time functions for SLI and SLO calculations 2020-01-03 00:41:36 +02:00
Aliaksandr Valialkin
eb1a66c577 lib/metricsq: add ExpandWithExprs 2019-12-25 22:20:21 +02:00
Aliaksandr Valialkin
453d71d082 Rename lib/promql to lib/metricsql and apply small fixes 2019-12-25 22:09:09 +02:00
Mike Poindexter
009d1559db Split Extended PromQL parsing to a separate library 2019-12-25 22:09:07 +02:00
Aliaksandr Valialkin
ff18101d30 app/vmselect/promql: make sure AdjustStartEnd returns time range covering the same number of points as the initial time range 
This should prevent from the following panic at app/vmselect/promql/binary_op.go:255:

    BUG: len(leftVaues) must match len(rightValues) and len(dstValues)
 2019-12-24 22:45:49 +02:00
Aliaksandr Valialkin
e24ee43109 app/vmselect/promql: adjust calculations for rate and increase for the first value 
These calculations should trigger alerts on `/api/v1/query` for counters starting from values greater than 0.
 2019-12-24 19:41:03 +02:00
Aliaksandr Valialkin
9a2554691c app/vmselect/promql: properly calculate rate on the first data point 
It is calculated as `value / scrape_interval`, since the value was missing on the previous scrape,
i.e. we can assume its value was 0 at this time.
 2019-12-24 15:55:15 +02:00