mirror of https://github.com/VictoriaMetrics/VictoriaMetrics.git synced 2024-12-15 00:13:30 +01:00

Aliaksandr Valialkin def5573f92

app/vmselect/promql: properly handle precision errors in rollup functions

changes(), increases_over_time() and resets() shouldn't take into account
value changes, which may occur because of precision errors.

The maximum guaranteed precision for raw samples stored in VictoriaMetrics is 12 decimal digits.
So do not count relative changes for values if they are smaller than 1e-12 comparing to the value.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/767

2024-02-08 02:33:17 +02:00

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CHANGELOG

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CHANGELOG

The following tip changes can be tested by building VictoriaMetrics components from the latest commits according to the following docs:

Metrics of the latest version of VictoriaMetrics cluster are available for viewing at our sandbox. The sandbox cluster installation is running under the constant load generated by prometheus-benchmark and used for testing latest releases.

tip

SECURITY: upgrade Go builder from Go1.21.6 to Go1.21.7. See the list of issues addressed in Go1.21.7.
FEATURE: all VictoriaMetrics components: add support for TLS client certificate verification at -httpListenAddr (aka mTLS). See these docs. See this feature request.
FEATURE: all VictoriaMetrics components: add support for empty command flag values in short array notation. For example, -remoteWrite.sendTimeout=',20s,' specifies three -remoteWrite.sendTimeout values - the first and the last ones are default values (30s in this case), while the second one is 20s.
FEATURE: vmagent and single-node VictoriaMetrics: add support for data ingestion via DataDog lambda extension aka /api/beta/sketches endpoint. See these docs and this feature request. Thanks to @AndrewChubatiuk for the pull request.
FEATURE: VictoriaMetrics cluster: add -disableReroutingOnUnavailable command-line flag, which can be used for reducing resource usage spikes at vmstorage nodes during rolling restart. Thanks to @Muxa1L for the pull request.
FEATURE: dashboards/vmagent: add Targets scraped/s stat panel showing the number of targets scraped by the vmagent per-second.
FEATURE: dashboards/all: add new panel CPU spent on GC. It should help identifying cases when too much CPU is spent on garbage collection, and advice users on how this can be addressed.
BUGFIX: MetricsQL: properly propagate label filters from multiple arguments passed to aggregate functions. For example, sum({job="foo"}, {job="bar"}) by (job) + a was improperly optimized to sum({job="foo"}, {job="bar"}) by (job) + a{job="foo"} before being executed. This could lead to unexpected results. See this issue.
BUGFIX: MetricsQL: properly handle precision errors when calculating changes, changes_prometheus, increases_over_time and resets functions. See this issue.
BUGFIX: all VictoriaMetrics components: consistently return 200 http status code from /-/reload endpoint. Previously single-node VictoriaMetrics was returning 204 http status code. See this feature request.
BUGFIX: vmui: fix the graph dragging for Firefox and Safari. See this issue.
BUGFIX: vmui: fix handling invalid timezone. See this issue.
BUGFIX: vmui: fix the bug where the select does not open. See this issue.
BUGFIX: vmui: clear entered text in select after selecting a value. See this issue.

v1.97.1

Released at 2024-02-01

v1.97.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes for VictoriaMetrics enterprise. All these fixes are also included in the latest community release. The v1.97.x line will be supported for at least 12 months since v1.97.0 release

FEATURE: vmagent: add support for username_file option at basic_auth section in scrape_configs. See this feature request. Thanks to @wasim-nihal for the initial implementation.
BUGFIX: vmagent: fix the increased CPU usage when sending the data to remote storage. The issue has been introduced in v1.97.0.
BUGFIX: fix runtime error: slice bounds out of range panic, which can occur during query execution. See this issue. The bug has been introduced in v1.97.0.
BUGFIX: MetricsQL: properly handle avg_over_time({some_filter}[d]) keep_metric_names queries, where some_filter matches multiple time series with multiple names, while d is bigger or equal to 3h. See this issue.
BUGFIX: dashboards/single: fix typo in query for version annotation which falsely produced many version change events.

v1.97.0

Released at 2024-01-30

SECURITY: upgrade base docker image (Alpine) from 3.19.0 to 3.19.1. See alpine 3.19.1 release notes.
SECURITY: upgrade Go builder from Go1.21.5 to Go1.21.6. See the list of issues addressed in Go1.21.6.
FEATURE: improve new time series registration speed on systems with high number of CPU cores. Thanks to @misutoth for the initial idea and implementation.
FEATURE: make background merge more responsive and scalable. This should help the following issues: 5190, 3425, 648.
FEATURE: graphite: add support for negative index in groupByNode and aliasByNode functions. Thanks to @rbizos for the pull request.
FEATURE: vmagent: add support for discovering Hetzner Cloud and Hetzner Robot scrape targets. See this feature request and these docs.
FEATURE: vmagent: add support for DataDog v2 data ingestion protocol. See these docs and this feature request.
FEATURE: vmagent: reduce initial memory usage when scraping targets, which return huge responses (for example, kube-state-metrics in large Kubernetes cluster may return 100MB+ responses), without the need to explicitly enable stream parsing mode. See this issue.
FEATURE: vmagent: expose ability to set OAuth2 endpoint parameters per each -remoteWrite.url via the command-line flag -remoteWrite.oauth2.endpointParams. See these docs. Thanks to @mhill-holoplot for the pull request.
FEATURE: vmagent: add ability to set attach_metadata.node=true option for all the kubernetes_sd_configs defined at -promscrape.config via -promscrape.kubernetes.attachNodeMetadataAll command-line flag. See this feature request. Thanks to @wasim-nihal for the initial implementation.
FEATURE: vmagent: do not send unfinished aggregation state on shutdown or hot config reload by default, as it tend to produce unexpected anomalies with lower values. The old behavior can be restored by specifying flush_on_shutdown: true setting in streaming aggregation config. See more details here.
FEATURE: streaming aggregation: expand %{ENV_VAR} placeholders in config files with the corresponding environment variable values.
FEATURE: vmalert: expose ability to set OAuth2 endpoint parameters via the following command-line flags:
- -datasource.oauth2.endpointParams for -datasource.url
- -notifier.oauth2.endpointParams for -notifier.url
- -remoteRead.oauth2.endpointParams for -remoteRead.url
- -remoteWrite.oauth2.endpointParams for -remoteWrite.url
FEATURE: vmauth: add ability to proxy incoming requests to different backends based on the requested host via src_hosts option at url_map. See these docs.
FEATURE: vmauth: expose vmauth_user_request_backend_errors_total and vmauth_unauthorized_user_request_backend_errors_total metrics, which track the number of failed requests because of backend errors. See this feature request.
FEATURE: vmauth: add an ability to specify additional labels for per-user metrics via metric_labels section. See this feature request.
FEATURE: all VictoriaMetrics components: break HTTP client connection if an error occurs after the server at -httpListenAddr already sent response status code. Previously such an error couldn't be detected at client side. Now the client will get an error about invalid chunked response. The error message is simultaneously written to the server log and in the last line of the response. This should help detecting errors when migrating data between VictoriaMetrics instances by vmctl. See this issue.
FEATURE: all VictoriaMetrics components: add ability to specify arbitrary HTTP headers to send with every request to -pushmetrics.url. See push metrics docs.
FEATURE: all VictoriaMetrics components: add -metrics.exposeMetadata command-line flag, which allows displaying TYPE and HELP metadata at /metrics page exposed at -httpListenAddr. This may be needed when the /metrics page is scraped by collector, which requires the TYPE and HELP metadata such as Google Cloud Managed Prometheus.
FEATURE: all VictoriaMetrics components: add ability to dynamically re-read auth keys and passwords from files and urls when using file:///path/to/file or http://host/path syntax for the following command-line flags: -configAuthKey, -deleteAuthKey, -flagsAuthKey, -forceMergeAuthKey, -forceFlushAuthKey, -httpAuth.password, -metricsAuthKey, -pprofAuthKey, -reloadAuthKey, -search.resetCacheAuthKey, -snapshotAuthKey. For example, -httpAuth.password=file:///path/to/password. See these docs for details.
FEATURE: dashboards/cluster: add panels for detailed visualization of traffic usage between vmstorage, vminsert, vmselect components and their clients. New panels are available in the rows dedicated to specific components.
FEATURE: dashboards/cluster: update "Slow Queries" panel to show percentage of the slow queries to the total number of read queries served by vmselect. The percentage value should make it more clear for users whether there is a service degradation.
FEATURE: dashboards/single: change dashboard title from VictoriaMetrics to VictoriaMetrics - single-node. The new title should provide better understanding of this dashboard purpose.
FEATURE: vmctl: rename cmd-line flag vm-native-disable-retries to vm-native-disable-per-metric-migration to better reflect its meaning.
FEATURE: vmctl: add -vm-native-src-insecure-skip-verify and -vm-native-dst-insecure-skip-verify command-line flags for native protocol. It can be used for skipping TLS certificate verification when connecting to the source or destination addresses.
FEATURE: Alerting rules for VictoriaMetrics: add job label to DiskRunsOutOfSpace alerting rule, so it is easier to understand to which installation the triggered instance belongs.
FEATURE: vmstorage: add tenant identifier for log messages regarding dropping excessive labels due to limits defined by -maxLabelsPerTimeseries or -maxLabelValueLen command-line flags. Previously, it was hard to understand to which tenant the dropped labels belong.
FEATURE: vmui: add the ability to export and import query reports:
- add a Query Analyzer page that allows you to build graphs from JSON data containing the results of executing a query request.
- add an Export query button to the graph that saves the result of executing the query in JSON. See this pull request.
FEATURE: vmui: add -vmui.defaultTimezone flag to set a default timezone. See this issue and these docs.
FEATURE: vmui: include UTC in the timezone selection dropdown for standardized time referencing. See this issue.
FEATURE: vmui: add the ability to expand/collapse all tracing entries and download tracing data in .json format. See this issue.
FEATURE: add VictoriaMetrics datasource to docker compose environment. See this pull request.
BUGFIX: properly return the list of matching label names and label values from /api/v1/labels and /api/v1/label/.../values when the database contains more than -search.maxUniqueTimeseries unique time series on the selected time range. Previously VictoriaMetrics could return the number of matching timeseries exceeds ... error in this case. See this issue.
BUGFIX: properly return errors from export APIs. Previously these errors were silently suppressed. See this pull request.
BUGFIX: VictoriaMetrics cluster: properly return full results when -search.skipSlowReplicas command-line flag is passed to vmselect and when vmstorage groups are in use. Previously partial results could be returned in this case.
BUGFIX: vminsert: properly accept samples via OpenTelemetry data ingestion protocol when these samples have no resource attributes. Previously such samples were silently skipped.
BUGFIX: vmstorage: added missing -inmemoryDataFlushInterval command-line flag, which was missing in VictoriaMetrics cluster after implementing this feature in v1.85.0.
BUGFIX: vmstorage: properly expire storage/prefetchedMetricIDs cache. Previously this cache was never expired, so it could grow big under high churn rate. This could result in increasing CPU load over time.
BUGFIX: vmalert: check -external.url schema when starting vmalert, must be http or https. Before, alertmanager could reject alert notifications if -external.url contained no or wrong schema.
BUGFIX: vmalert: automatically add exported_ prefix for original evaluation result label if it's conflicted with external or reserved one, previously it was overridden. See this issue.
BUGFIX: vmalert: autogenerate ALERTS_FOR_STATE time series for alerting rules with for: 0. Previously, ALERTS_FOR_STATE was generated only for alerts with for > 0. The change aligns with Prometheus behavior. See more details in this issue.
BUGFIX: vmalert: fix data race during hot-config reload. The result of the race could cause all rules from updated group to fail with context cancelled error.
BUGFIX: MetricsQL: consistently sort results for q1 or q2 query, so they do not change colors with each refresh in Grafana. See this issue.
BUGFIX: MetricsQL: properly return results from bottomk and bottomk_*() functions when some of these results contain NaN values. See this issue. Thanks to @xiaozongyang for the fix.
BUGFIX: MetricsQL: properly handle queries, which wrap rollup functions with multiple arguments without explicitly specified lookbehind window in square brackets into aggregate functions. For example, sum(quantile_over_time(0.5, process_resident_memory_bytes)) was resulting to expecting at least 2 args to ...; got 1 args error. Thanks to @atykhyy for the pull request.
BUGFIX: vmctl: retry on import errors in vm-native mode. Before, retries happened only on writes into a network connection between source and destination. But errors returned by server after all the data was transmitted were logged, but not retried.
BUGFIX: vmagent: properly assume role with AWS IRSA authorization. Previously role chaining was not supported. See this issue for details.
BUGFIX: vmagent: exit if there is config syntax error in scrape_config_files when -promscrape.config.strictParse=true. See this issue.
BUGFIX: vmagent: properly discover targets for role: endpoints and role: endpointslice in kubernetes_sd_configs. Previously some endpoints and endpointslice targets could be left undiscovered or some targets could have missing __meta_* labels when performing service discovery in busy Kubernetes clusters with large number of pods. See this pull request.
BUGFIX: vmagent: respect explicitly set series_limit: 0 in scrape_config. This allows removing series_limit restriction on a per-scrape_config basis when global limit is set via -promscrape.seriesLimitPerTarget. Previously, 0 value was ignored in favor of -promscrape.seriesLimitPerTarget.
BUGFIX: vmagent: do not discover scrape targets for already terminated pods and containers in kubernetes_sd_configs. Such pods and containers cannot be scraped and cannot resurrect, so there is no sense in generating scrape targets for them.
BUGFIX: vmagent: properly follow redirects to another hostnames when follow_redirects: true option is set in scrape_configs while stream parsing mode is disabled. See this issue and this pull request.
BUGFIX: vmui: fix a link for the statistic inaccuracy explanation in the cardinality explorer tool. See this issue.
BUGFIX: vmui: fix the display of autocomplete results and cache the results. See this issue and this issue.
BUGFIX: vmui: send step param for instant queries. The change reverts this issue due to reasons explained in this comment.
BUGFIX: vmui: fix the Enter key press issue in the Query field when using autocomplete. See this issue.
BUGFIX: all: fix potential panic during components shutdown when metrics push is configured. See this issue. Thanks to @zhdd99 for the pull request.
BUGFIX: MetricsQL: properly process queries with too big lookbehind window such as foo[100y]. Previously, such queries could return empty responses even if foo is present in database. See this issue.
BUGFIX: MetricsQL: properly handle possible negative results caused by float operations precision error in rollup functions like rate() or increase(). See this issue.
BUGFIX: vmselect: vmsingle/vmselect returns http status 429 (TooManyRequests) instead of 503 (ServiceUnavailable) when max concurrent requests limit is reached.
BUGFIX: vmselect: set proper timestamps in instant query results if the query contains rollup functions with lookbehind windows in square brackets exceeding 3 hours. For example, sum(avg_over_time(up[24h])). This bug has been introduced in v1.95.0. See this and this issues.

v1.96.0

See changes here

v1.95.1

See changes here

v1.95.0

See changes here

v1.94.0

See changes here

v1.93.11

Released at 2024-02-01

v1.93.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes. The v1.93.x line will be supported for at least 12 months since v1.93.0 release

SECURITY: upgrade base docker image (Alpine) from 3.19.0 to 3.19.1. See alpine 3.19.1 release notes.
BUGFIX: properly return errors from export APIs. Previously these errors were silently suppressed. See this pull request.
BUGFIX: vmagent: properly discover targets for role: endpoints and role: endpointslice in kubernetes_sd_configs. Previously some endpoints and endpointslice targets could be left undiscovered or some targets could have missing __meta_* labels when performing service discovery in busy Kubernetes clusters with large number of pods. See this pull request.
BUGFIX: vmagent: respect explicitly set series_limit: 0 in scrape_config. This allows removing series_limit restriction on a per-scrape_config basis when global limit is set via -promscrape.seriesLimitPerTarget. Previously, 0 value was ignored in favor of -promscrape.seriesLimitPerTarget.
BUGFIX: MetricsQL: properly process queries with too big lookbehind window such as foo[100y]. Previously, such queries could return empty responses even if foo is present in database. See this issue.
BUGFIX: MetricsQL: properly handle possible negative results caused by float operations precision error in rollup functions like rate() or increase(). See this issue.

v1.93.10

Released at 2024-01-17

v1.93.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes. The v1.93.x line will be supported for at least 12 months since v1.93.0 release

SECURITY: upgrade Go builder from Go1.21.5 to Go1.21.6. See the list of issues addressed in Go1.21.6.
BUGFIX: vminsert: properly accept samples via OpenTelemetry data ingestion protocol when these samples have no resource attributes. Previously such samples were silently skipped.
BUGFIX: vmstorage: added missing -inmemoryDataFlushInterval command-line flag, which was missing in VictoriaMetrics cluster after implementing this feature in v1.85.0.
BUGFIX: vmstorage: properly expire storage/prefetchedMetricIDs cache. Previously this cache was never expired, so it could grow big under high churn rate. This could result in increasing CPU load over time.
BUGFIX: vmalert: check -external.url schema when starting vmalert, must be http or https. Before, alertmanager could reject alert notifications if -external.url contained no or wrong schema.
BUGFIX: MetricsQL: properly return results from bottomk and bottomk_*() functions when some of these results contain NaN values. See this issue. Thanks to @xiaozongyang for the fix.
BUGFIX: MetricsQL: properly handle queries, which wrap rollup functions with multiple arguments without explicitly specified lookbehind window in square brackets into aggregate functions. For example, sum(quantile_over_time(0.5, process_resident_memory_bytes)) was resulting to expecting at least 2 args to ...; got 1 args error. Thanks to @atykhyy for the pull request.
BUGFIX: vmagent: properly assume role with AWS IRSA authorization. Previously role chaining was not supported. See this issue for details.
BUGFIX: all: fix potential panic during components shutdown when metrics push is configured. See this issue. Thanks to @zhdd99 for the pull request.
BUGFIX: vmctl: check for Error field in response from influx client during migration. Before, only network errors were checked. Thanks to @wozz for the pull request.
BUGFIX: vmctl: retry on import errors in vm-native mode. Before, retries happened only on writes into a network connection between source and destination. But errors returned by server after all the data was transmitted were logged, but not retried.

SECURITY: upgrade base docker image (Alpine) from 3.19.0 to 3.19.1. See alpine 3.19.1 release notes.
BUGFIX: properly return errors from export APIs. Previously these errors were silently suppressed. See this pull request.
BUGFIX: vmagent: respect explicitly set series_limit: 0 in scrape_config. This allows removing series_limit restriction on a per-scrape_config basis when global limit is set via -promscrape.seriesLimitPerTarget. Previously, 0 value was ignored in favor of -promscrape.seriesLimitPerTarget.
BUGFIX: MetricsQL: properly process queries with too big lookbehind window such as foo[100y]. Previously, such queries could return empty responses even if foo is present in database. See this issue.
BUGFIX: MetricsQL: properly handle possible negative results caused by float operations precision error in rollup functions like rate() or increase(). See this issue.

v1.87.13

Released at 2024-01-17

v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes. The v1.87.x line will be supported for at least 12 months since v1.87.0 release

SECURITY: upgrade Go builder from Go1.21.5 to Go1.21.6. See the list of issues addressed in Go1.21.6.
BUGFIX: vmstorage: added missing -inmemoryDataFlushInterval command-line flag, which was missing in VictoriaMetrics cluster after implementing this feature in v1.85.0.
BUGFIX: MetricsQL: properly handle queries, which wrap rollup functions with multiple arguments without explicitly specified lookbehind window in square brackets into aggregate functions. For example, sum(quantile_over_time(0.5, process_resident_memory_bytes)) was resulting to expecting at least 2 args to ...; got 1 args error. Thanks to @atykhyy for the pull request.
BUGFIX: vmstorage: properly expire storage/prefetchedMetricIDs cache. Previously this cache was never expired, so it could grow big under high churn rate. This could result in increasing CPU load over time.
BUGFIX: MetricsQL: properly return results from bottomk and bottomk_... functions when some of these results contain NaN values. See this issue. Thanks to @xiaozongyang for the fix.
BUGFIX: all: fix potential panic during components shutdown when metrics push is configured. See this issue. Thanks to @zhdd99 for the pull request.