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VictoriaMetrics/docs/CHANGELOG_2021.md
Arkadii Yakovets a6655322b1
docs: fix docs/ and README.md spelling errors (#6362) 
Fixes `docs/` and `README.md` typos and errors.

Signed-off-by: Arkadii Yakovets <ark@victoriametrics.com>

(cherry picked from commit c740a8042e)
Signed-off-by: hagen1778 <roman@victoriametrics.com>
2024-06-03 11:53:33 +02:00

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/CHANGELOG_2021.html

CHANGELOG for the year 2021

v1.71.0

Released at 2021-12-20

Update notes: deduplication logic was slightly changed on the release, which may cause extra background merges for already existing data parts for installations with -dedup.minScrapeInterval flag value greater than 0. This process is intentionally limited by one CPU core, but still can result into increase of CPU usage until merges are finished.

We recommend updating in "off-peak" time when load on the VictoriaMetrics is on its minimum.

  • FEATURE: VictoriaMetrics enterprise: add multi-level downsampling support. See these docs and this feature request.

  • FEATURE: vmui: add ability to analyze the correlation between two queries on a single graph. Just click +Query button, enter the second query in the newly appeared input field and press Ctrl+Enter. Results for both queries should be displayed simultaneously on the same graph. Every query has its own vertical scale, which is displayed on the left and the right side of the graph. Lines for the second query are dashed. See this pull request.

  • FEATURE: vmui: add ability to override the interval between returned datapoints. By default it is automatically calculated depending on the selected time range and horizontal resolution of the graph. Now it is possible to override it with custom values. This may be useful during data exploration and debugging.

  • FEATURE: accept optional extra_filters[]=series_selector query args at Prometheus query APIs additionally to extra_label query args. This allows enforcing additional filters for all the Prometheus query APIs by using vmgateway or vmauth. See this feature request.

  • FEATURE: vmauth: allow specifying http and https urls in -auth.config command-line flag. See this pull request. Thanks for @TFM93 .

  • FEATURE: vmagent: allow specifying http and https urls in the following command-line flags: -promscrape.config, -remoteWrite.relabelConfig and -remoteWrite.urlRelabelConfig.

  • FEATURE: vminsert: allow specifying http and https urls in -relabelConfig command-line flag.

  • FEATURE: vminsert: add -maxLabelValueLen command-line flag for the ability to configure the maximum length of label value. See this feature request.

  • FEATURE: preserve the order of time series passed to limit_offset function. This allows implementing series paging via limit_offset(limit, offset, sort_by_label(...)). See this and this issues.

  • FEATURE: automatically convert (value1|...|valueN) into {value1,...,valueN} inside __graphite__ pseudo-label. This allows using Grafana multi-value template variables inside __graphite__ pseudo-label. For example, {__graphite__=~"foo.($bar)"} is expanded to {__graphite__=~"foo.{x,y}"} if both x and y are selected for $bar template variable. See these docs for details.

  • FEATURE: add timestamp_with_name function. It works the same as timestamp, but leaves the original time series names, so it can be used in queries, which match multiple time series names: timestamp_with_name({foo="bar"}[1h]). See this comment for more context.

  • FEATURE: add changes_prometheus, increase_prometheus and delta_prometheus functions, which don't take into account the previous sample before the given lookbehind window specified in square brackets. These functions may be used when the Prometheus behaviour for changes(), increase() and delta() functions is needed to be preserved. VictoriaMetrics uses slightly different behaviour for changes(), increase() and delta() functions by default - see this article for details. See this issue.

  • BUGFIX: fix unaligned 64-bit atomic operation panic on 32-bit architectures, which has been introduced in v1.70.0. See this issue.

  • BUGFIX: vmalert: restore the ability to use $labels.alertname in labels templating. See this issue.

  • BUGFIX: vmui: add missing query caption to the input field for the query. See this issue.

  • BUGFIX: vmui: fix navigation over query history with Ctrl+up/down and fix zoom relatively to the cursor position. See this pull request.

  • BUGFIX: deduplicate samples more thoroughly if deduplication is enabled. Previously some duplicate samples may be left on disk for time series with high churn rate. This may result in bigger storage space requirements.

  • BUGFIX: vmagent: follow up to 5 redirects when follow_redirects: true is set for a particular scrape config. Previously only a single redirect was performed in this case. It is expected these redirects are performed to the original hostname. See this issue.

  • BUGFIX: de-duplicate data exported via /api/v1/export/csv by default if deduplication is enabled. The de-duplication can be disabled by passing reduce_mem_usage=1 query arg to /api/v1/export/csv. See this issue.

  • BUGFIX: vmalert: properly store historical data to old Prometheus versions. See this issue.

v1.70.0

Released at 2021-12-02

  • FEATURE: vmalert: add ability to pass arbitrary query args to -datasource.url on a per-group basis via params option. See this pull request.

  • FEATURE: add now() function to MetricsQL. This function returns the current timestamp in seconds. See these docs.

  • FEATURE: vmauth: allow using optional name field in configs. This field is then used as username label value for vmauth_user_requests_total metric. See this feature request.

  • FEATURE: vmagent: export vm_persistentqueue_read_duration_seconds_total and vm_persistentqueue_write_duration_seconds_total metrics, which can be used for detecting persistent queue saturation with rate(vm_persistentqueue_write_duration_seconds_total) > 0.9 alerting rule.

  • FEATURE: export vm_filestream_read_duration_seconds_total and vm_filestream_write_duration_seconds_total metrics, which can be used for detecting persistent disk saturation with rate(vm_filestream_read_duration_seconds_total) > 0.9 alerting rule.

  • FEATURE: export vm_cache_size_max_bytes metrics, which show capacity for various caches. These metrics can be used for determining caches with reach its capacity with vm_cache_size_bytes / vm_cache_size_max_bytes > 0.9 query.

  • FEATURE: vmbackup, vmrestore: add -s3ForcePathStyle command-line flag, which can be used for making backups to Aliyun OSS. See this pull request.

  • FEATURE: vmctl: improve data migration from OpenTSDB. See this pull request. Thanks to @johnseekins .

  • FEATURE: suppress connection reset by peer errors when remote client resets TCP connection to VictoriaMetrics / vmagent while ingesting the data via InfluxDB line protocol, Graphite protocol or OpenTSDB protocol. This error is expected, so there is no need in logging it.

  • FEATURE: vmui: store the display type in URL, so it isn't lost when copy-pasting the URL. See this feature request.

  • FEATURE: vmalert: make -notifier.url command-line flag optional. This flag can be omitted if vmalert is used solely for recording rules and doesn't evaluate alerting rules. See this pull request.

  • FEATURE: vmbackup, vmrestore: export internal metrics at http://vmbackup:8420/metrics and http://vmrestore:8421/metrics for better visibility of the backup/restore process.

  • FEATURE: allow trailing whitespace after the timestamp when parsing Graphite plaintext lines. See this issue.

  • FEATURE: expose /-/healthy and /-/ready endpoints as Prometheus does. This is needed for improving integration with third-party solutions, which rely on these endpoints. See this issue.

  • BUGFIX: vmagent: prevent from scraping duplicate targets if -promscrape.dropOriginalLabels command-line flag is set. See this issue. Thanks to @guidao for the fix.

  • BUGFIX: vmstorage enterprise: added missing vm_tenant_used_tenant_bytes metric, which shows the approximate per-tenant disk usage. See these docs and this issue.

  • BUGFIX: vmauth: properly take into account the value passed to -maxIdleConnsPerBackend command-line flag. See this issue.

  • BUGFIX: vmagent: fix reading data from Kafka.

  • BUGFIX: vmalert: fix replay mode in enterprise version.

  • BUGFIX: consistently return zero from deriv() function applied to a constant time series. Previously it could return small non-zero values in this case.

  • BUGFIX: vmrestore: properly resume downloading for partially downloaded big files. Previously such files were re-downloaded from the beginning after the interrupt. Now only the remaining parts of the file are downloaded. This allows saving network bandwidth. See this issue.

  • BUGFIX: vmui: do not store the last query across vmui page reloads. See this issue.

  • BUGFIX: vmui: fix Cannot read properties of undefined error at table view. See this issue.

v1.69.0

Released at 2021-11-08

  • FEATURE: vmalert: allow groups with empty rules list like Prometheus does. See this pull request.

  • FEATURE: vmalert: allow groups with default tenant in -clusterMode. Default tenant values can be specified via -defaultTenant.prometheus and -defaultTenant.graphite. See these docs.

  • FEATURE: vmagent: add collapse and expand buttons per each group of targets with the same job_name at http://vmagent:8429/targets page.

  • FEATURE: automatically detect timestamp precision (ns, us, ms or s) for the data ingested into VictoriaMetrics via InfluxDB line protocol.

  • FEATURE: vmagent: add ability to protect /config page with auth key via -configAuthKey command-line flag. This page may contain sensitive config information, so it may be good to restrict access to this page. See this issue.

  • FEATURE: vmagent: hide passwords and auth tokens at /config page like Prometheus does. See this issue.

  • FEATURE: vmagent: add -promscrape.maxResponseHeadersSize command-line flag for tuning the maximum HTTP response headers size for Prometheus scrape targets.

  • FEATURE: vmagent: send data to multiple configured remote storage systems in parallel (e.g. when multiple -remoteWrite.url flag values are specified). This should improve data ingestion speed.

  • FEATURE: vmagent: add -remoteWrite.maxRowsPerBlock command-line flag for tuning the number of samples to send to remote storage per each block. Bigger values may improve data ingestion performance at the cost of higher memory usage.

  • FEATURE: vmagent: distribute Kafka messages among all the partitions when writing data to Kafka.

  • FEATURE: add label_graphite_group function for extracting the given groups from Graphite metric names.

  • FEATURE: add duration_over_time function for calculating the actual lifetime of the time series with possible gaps. See this feature request.

  • FEATURE: add limit_offset function, which can be used for implementing simple paging over big number of time series. See this feature request.

  • BUGFIX: vmagent: reduce the increased memory usage when scraping targets with big number of metrics which periodically change. The memory usage has been increased in v1.68.0 after vmagent started generating staleness markers in stream parse mode. See this issue.

  • BUGFIX: vmagent: properly display proxy_url config option at http://vmagent:8429/config page. See this issue.

  • BUGFIX: fix tests for Apple M1. See this issue.

v1.68.0

Released at 2021-10-22

  • FEATURE: vmagent: expose -promscrape.config contents at /config page as Prometheus does. See this feature request.

  • FEATURE: vmagent: add show original labels button per each scrape target displayed at http://vmagent:8429/targets page. This should improve debuggability for service discovery and relabeling issues similar to this one. See this feature request.

  • FEATURE: vmagent: shard targets among cluster nodes after the relabeling is applied. This should guarantee that targets with the same set of labels go to the same vmagent node in the cluster. See this issue.

  • FEATURE: vmagent: automatically switch to stream parsing mode if the response from the given target exceeds the command-line flag value -promscrape.minResponseSizeForStreamParse. This should reduce memory usage when vmagent scrapes targets with non-uniform response sizes (this is the case in Kubernetes monitoring).

  • FEATURE: vmagent: send Prometheus-like staleness marks in stream parsing mode. Previously staleness marks weren't sent in stream parsing mode. See these docs for details.

  • FEATURE: vmagent: properly calculate scrape_series_added metric for targets in stream parsing mode. Previously it was set to 0 in stream parsing mode. See more details about this metric.

  • FEATURE: vmagent: expose promscrape_series_limit_max_series and promscrape_series_limit_current_series metrics at http://vmagent:8429/metrics for scrape targets with the enabled series limiter.

  • FEATURE: vmagent: return error if sample_limit or series_limit options are set when stream parsing mode is enabled, since these limits cannot be applied in stream parsing mode.

  • FEATURE: vmalert: add -remoteRead.disablePathAppend command-line flag, which allows specifying the full -remoteRead.url. If -remoteRead.disablePathAppend is set, then vmalert doesn't add /api/v1/query suffix to -remoteRead.url.

  • FEATURE: add trigonometric functions, which are going to be added in Prometheus 2.31: acosh, asinh, atan, atanh, cosh, deg, rad, sinh, tan, tanh. Also add atan2 binary operator. See this pull request.

  • FEATURE: consistently return the same set of time series from limitk function. This improves the usability of periodically refreshed graphs.

  • FEATURE: vmui: varios UX improvements. See this pull request and these docs.

  • FEATURE: vmauth: add ability to specify HTTP headers, which will be sent in requests to backends. See this feature request.

  • FEATURE: add /flags page to all the VictoriaMetrics components. This page contains command-line flags passed to the component.

  • FEATURE: allow using tab separators additionally to whitespace separators when ingesting data in Graphite plaintext protocol. Such separators are supported by Carbon-c-relay.

  • BUGFIX: vmstorage: fix unaligned 64-bit atomic operation panic on 32-bit architectures (arm and 386). The panic has been introduced in v1.67.0.

  • BUGFIX: vmalert, vmauth: prevent from frequent closing of TCP connections established to backends under high load. This should reduce the number of TCP sockets in TIME_WAIT state at vmalert and vmauth under high load. See this pull request.

  • BUGFIX: vmalert: correctly calculate alert ID including extra labels. Previously, ID for alert entity was generated without alertname or groupname. This led to collision, when multiple alerting rules within the same group producing same labelsets. E.g. expr: sum(metric1) by (job) > 0 and expr: sum(metric2) by (job) > 0 could result into same labelset job: "job". The bugfix adds all extra labels right after receiving response from the datasource. See this pull request.

  • BUGFIX: vmalert: fix links in Web UI. See this pull request.

  • BUGFIX: vmagent: set honor_timestamps: true by default in scrape configs if this options isn't set explicitly. This aligns the behaviour with Prometheus.

  • BUGFIX: vmagent: group scrape targets by the original job names at http://vmagent:8429/targets page like Prometheus does. Previously they were grouped by the job name after relabeling, which may result in unexpected empty target groups. See this issue.

  • BUGFIX: vmctl: fix importing boolean fields from InfluxDB line protocol. See this issue.

v1.67.0

Released at 2021-10-08

  • FEATURE: add ability to accept metrics from DataDog agent and DogStatsD. See these docs. This option simplifies the migration path from DataDog to VictoriaMetrics. See also this issue.

  • FEATURE: vmagent enterprise: add support for data reading and writing from/to Apache Kafka. See these docs.

  • FEATURE: vmui: switch to μPlot and add ability to naturally scroll and zoom graphs. See these docs. Thanks to @Loori-R.

  • FEATURE: vmstorage: stop accepting new data if -storageDataPath directory contains less than -storage.minFreeDiskSpaceBytes of free space. This should prevent from out of disk space crashes. See this feature request.

  • FEATURE: calculate quantiles in the same way as Prometheus does in such functions as quantile_over_time and quantile. Previously results from VictoriaMetrics could be slightly different than results from Prometheus. See this and this issues.

  • FEATURE: add rollup_scrape_interval(m[d]) function to MetricsQL, which returns min, max and avg values for the interval between samples for m on the given lookbehind window d.

  • FEATURE: add topk_last(k, q) and bottomk_last(k, q) functions to MetricsQL, which return up to k time series from q with the maximum / minimum last value on the graph.

  • BUGFIX: align behavior of the queries a or on (labels) b, a and on (labels) b and a unless on (labels) b where b has multiple time series with the given labels to Prometheus behavior. See this pull request.

  • BUGFIX: vmagent: fix openstack_sd_config service discovery when both domain_name and project_id config options are set. See this issue.

  • BUGFIX: return proper values (zeroes) from stddev_over_time and stdvar_over_time functions when the lookbehind window in square brackets contains only a single sample. Previously the sample value was incorrectly returned in this case.

  • BUGFIX: vminsert: fix uneven distribution of time series among storage nodes in multi-level cluster setup. See this issue.

v1.66.2

Released at 2021-09-23

  • FEATURE: vmagent: add vm_promscrape_max_scrape_size_exceeded_errors_total metric for counting of the failed scrapes due to the exceeded response size (the response size limit can be configured via -promscrape.maxScrapeSize command-line flag). See this issue.

  • BUGFIX: vmalert: properly reload rule groups if only the interval config option is changed. See this issue.

  • BUGFIX: properly handle {__name__=~"prefix(suffix1|suffix2)",other_label="..."} queries. They may return unexpected empty responses since v1.66.0. See this issue.

v1.66.1

Released at 2021-09-22

  • FEATURE: add -cluster and/or -enterprise suffixes to short_version label at vm_app_version metric exposed at /metrics page of every VictoriaMetrics component. See this issue.

  • BUGFIX: vmselect: fix accessing Graphite APIs. The access has been broken in v1.66.0, because /graphite/* path prefix accidentally clashed with /graph* path prefix used for VictoriaMetrics UI (aka vmui).

  • BUGFIX: fix parsing regex: <bool_or_number> in relabeling rules (for example, regex: true or regex: 123). The bug has been introduced in v1.66.0.

v1.66.0

Released at 2021-09-20

  • FEATURE: vmalert: add web UI with the list of alerting groups, alerts and alert statuses. See this pull request.

  • FEATURE: vmalert: add -rule.maxResolveDuration command-line flag, which could be used for limiting the auto-resolve duration for the alerting rule. By default it is limited to 3x evaluation interval. This could be too high for big evaluation intervals. See this issue.

  • FEATURE: vmalert: add support for Bearer token authorization for -datasource.url, -remoteRead.url and -remoteWrite.url. See this issue.

  • FEATURE: vmagent: send stale markers for disappeared metrics like Prometheus does. Previously stale markers were sent only when the scrape target disappears or when it becomes temporarily unavailable. See these docs for details.

  • FEATURE: vmagent: add ability to set series_limit option for a particular scrape target via __series_limit__ label. This allows setting the limit on the number of time series on a per-target basis. See these docs for details.

  • FEATURE: vmagent: add ability to set stream_parse option for a particular scrape target via __stream_parse__ label. This allows managing the stream parsing mode on a per-target basis. See these docs for details.

  • FEATURE: vmagent: add ability to set scrape_interval and scrape_timeout options for a particular target via __scrape_interval__ and __scrape_timeout__ labels in the same way as Prometheus 2.30 does. See this pull request.

  • FEATURE: vmagent: generate scrape_timeout_seconds metric per each scrape target, so the target saturation could be calculated with scrape_duration_seconds / scrape_timeout_seconds. See the corresponding pull request from Prometheus 2.30.

  • FEATURE: vmagent: reduce CPU usage when calculating the number of newly added series per scrape (this number is sent to remote storage in scrape_series_added metric).

  • FEATURE: vmagent: reduce CPU usage when applying series_limit to scrape targets with constant set of metrics. See more information about series_limit here.

  • FEATURE: vminsert: disable rerouting by default when a few of vmstorage nodes start accepting data at lower speed than the rest of vmstorage nodes. This should improve VictoriaMetrics cluster stability during rolling restarts and during spikes in time series churn rate. The rerouting can be enabled by passing -disableRerouting=false command-line flag to vminsert.

  • FEATURE: vmauth: do not put invalid auth tokens into log by default due to security reasons. The logging can be returned back by passing -logInvalidAuthTokens command-line flag to vmauth. Requests with invalid auth tokens are counted at vmagent_http_request_errors_total{reason="invalid_auth_token"} metric exposed by vmauth at /metrics page.

  • FEATURE: add new relabeling actions: keep_metrics and drop_metrics. This simplifies metrics filtering by metric names. See these docs for more details.

  • FEATURE: allow splitting long regex in relabeling filters into an array of shorter regexps, which can be put into multiple lines for better readability and maintainability. See these docs for more details.

  • FEATURE: optimize performance for queries with regexp filters on metric name like {__name__=~"metric1|...|metricN"}. See this pull request from @faceair.

  • FEATURE: vmui: use Prometheus-compatible query args, so vmui could be accessed from graph editor in Grafana. See this pull request. Thanks to @Loori-R.

  • FEATURE: vmselect: automatically add missing port to -storageNode hostnames. For example, -storageNode=vmstorage1,vmstorage2 is automatically translated to -storageNode=vmstorage1:8401,vmstorage2:8401. This simplifies manual setup of VictoriaMetrics cluster.

  • FEATURE: vminsert: automatically add missing port to -storageNode hostnames. For example, -storageNode=vmstorage1,vmstorage2 is automatically translated to -storageNode=vmstorage1:8400,vmstorage2:8400. This simplifies manual setup of VictoriaMetrics cluster.

  • FEATURE: add mad(q) function to MetricsQL. It calculates Median absolute deviation for groups of points with identical timestamps across multiple time series.

  • FEATURE: add outliers_mad(tolerance, q) function to MetricsQL. It returns time series with peaks outside the Median absolute deviation multiplied by tolerance.

  • FEATURE: add histogram_quantiles("phiLabel", phi1, ..., phiN, buckets) function to MetricsQL. It calculates the given phi*-quantiles over the given buckets and returns time series per each quantile with the corresponding {phiLabel="phi*"} label.

  • FEATURE: add quantiles_over_time("phiLabel", phi1, ..., phiN, series_selector[d]) function to MetricsQL. It calculates the given phi*-quantiles over raw samples selected by series_selector on the given lookbehind window d. It returns time series per each quantile with the corresponding {phiLabel="phi*"} label.

  • FEATURE: enterprise: do not ask for -eula flag if -version flag is passed to enterprise app. See this issue.

  • BUGFIX: properly handle queries with multiple filters matching empty labels such as metric{label1=~"foo|",label2="bar|"}. This filter must match the following series: metric, metric{label1="foo"}, metric{label2="bar"} and metric{label1="foo",label2="bar"}. Previously it was matching only metric{label1="foo",label2="bar"}. See this issue.

  • BUGFIX: vmselect: reset connection timeouts after each request to vmstorage. This should prevent from cannot read data in 0.000 seconds: unexpected EOF warning in logs. See this issue. Thanks to @mxlxm .

  • BUGFIX: keep metric name for time series returned from rollup_candlestick function, since the returned series don't change the meaning of the original series. See this issue.

  • BUGFIX: use Prometheus-compatible label value formatting for count_values function. Previously big values could be improperly formatted, which could break query results, which rely on label value such as ... on(label) count_values("label", ...).

  • BUGFIX: vmagent: properly use https scheme for wildcard TLS certificates for role: ingress targets in Kubernetes service discovery. See this issue.

  • BUGFIX: vmagent: support host networking mode for docker_sd_config. See this issue.

  • BUGFIX: fix non-repeatable results from quantile_over_time() function when the number of input samples exceeds 1000. See this issue.

  • BUGFIX: vmagent: fix EC2 zone discovery when filters are specified in ec2_sc_config. See this issue.

v1.65.0

Released at 2021-09-01

  • FEATURE: vmagent: add ability to read scrape configs from multiple files specified in scrape_config_files section. See this issue.

  • FEATURE: vmagent: reduce memory usage and CPU usage when Prometheus staleness tracking is enabled for metrics exported from the deleted or disappeared scrape targets.

  • FEATURE: vmagent: add the ability to limit the number of unique time series scraped per each target. This can be done either globally via -promscrape.seriesLimitPerTarget command-line option or on per-target basis via series_limit option at scrape_config section. See the updated docs on cardinality limiter and this issue.

  • FEATURE: vmagent: discover role: ingress and role: endpointslice in kubernetes_sd_config via v1 API instead of v1beta1 API if Kubernetes supports it. This fixes service discovery in Kubernetes v1.22 and newer versions. See these docs.

  • FEATURE: take into account failed queries in vm_request_duration_seconds summary at /metrics. Previously only successful queries were taken into account. This could result in skewed summary. See this pull request.

  • FEATURE: vmalert: add an official dashboard for vmalert. See these docs.

  • FEATURE: vmalert: add ability to set additional labels per group via labels config section. See this issue.

  • FEATURE: vmalert: add -disableAlertgroupLabel command-line flag for disabling the label with alert group name. This may be needed for proper deduplication in Alertmanager. See this issue.

  • FEATURE: update Go builder from v1.16.7 to v1.17.0. This improves data ingestion and query performance by up to 5% according to benchmarks. See the release post for Go1.17.

  • FEATURE: vmagent: expose promscrape_discovery_http_errors_total metric, which can be used for monitoring the number of failed discovery attempts per each http_sd config.

  • FEATURE: do not reset response cache when a sample with old timestamp is ingested into VictoriaMetrics if -search.disableAutoCacheReset command-line option is set. See this feature request.

  • FEATURE: add quantiles("phiLabel", phi1, ..., phiN, q) aggregate function to MetricsQL, which calculates the given phi* quantiles over time series returned by q. See this feature request.

  • BUGFIX: rename sign function to sgn in order to be consistent with PromQL. See this pull request from Prometheus.

  • BUGFIX: vmagent: add role: endpointslice in kubernetes_sd_config in order to be consistent with Prometheus. Previously this role was supported with incorrect name: role: endpointslices. Now both endpointslice and endpointslices are supported. See the corresponding code in Prometheus.

  • BUGFIX: improve the detection of the needed free space for background merge operation. This should prevent from possible out of disk space crashes during big merges. See this issue.

  • BUGFIX: vmauth: remove trailing slash from the full url before requesting it from the backend. See this pull request.

  • BUGFIX: vmbackupmanager: fix timeout error when snapshot takes longer than 10 seconds. See this issue.

  • BUGFIX: properly parse OpenTSDB put messages with multiple spaces between message elements. See this issue. Thanks to @envzhu for the fix.

v1.64.1

Released at 2021-08-19

  • FEATURE: add bitmap_and(q, mask), bitmap_or(q, mask) and bitmak_xor(q, mask) functions to MetricsQL. These functions allow performing bitwise operations over data points in time series. See this issue.

  • FEATURE: vmalert: add -remoteWrite.disablePathAppend command-line flag, which can be used when custom -remoteWrite.url must be specified. For example, ./vmalert -disablePathAppend -remoteWrite.url='http://foo.bar/a/b/c?d=e' would write data to http://foo.bar/a/b/c?d=e instead of http://foo.bar/a/b/c?d=e/api/v1/write. See this pull request.

  • FEATURE: vmagent: add -promscrape.noStaleMarkers command-line flag for disabling sending Prometheus stale markers for metrics from disappeared scrape targets. This option may be used for reducing memory usage when scraping big number of metrics with big number of labels and when stale markers aren't needed.

  • FEATURE: vmselect: add -search.noStaleMarkers command-line flag for disabling stale markers handling in queries. This may save some CPU time when the queried data doesn't contain stale markers.

  • BUGFIX: vmagent: stop scrapers for deleted targets before starting scrapers for added targets. This should prevent from possible time series overlap when old targets are substituted by new targets (for example, during new deployment in Kubernetes). The overlap could lead to incorrect query results. See this issue.

  • BUGFIX: vmagent: send Prometheus stale markers for the previously scraped metrics on failed scrapes like Prometheus does. See this article.

  • BUGFIX: upgrade base Docker image from Alpine 3.14.0 to Alpine 3.14.1 . This fixes potential security issues - see Alpine 3.14.1 release notes.

  • BUGFIX: disable overriding the lookbehind window [d] at last_over_time(m[d]) if d is smaller than the interval between samples, since users don't expect implicit overriding of explicitly set [d] in last_over_time(m[d]).

v1.64.0

Released at 2021-08-15

  • FEATURE: add support for Prometheus staleness markers. See this issue.

  • FEATURE: vmagent: automatically generate Prometheus staleness markers for the scraped metrics when scrape targets disappear in the same way as Prometheus does. See this issue.

  • FEATURE: add present_over_time(m[d]) function, which returns 1 if m has a least a single sample over the previous duration d. This function has been added also to Prometheus 2.29.

  • FEATURE: vmagent: support multitenant writes according to these docs. This allows using a single vmagent instance in front of VictoriaMetrics cluster for all the tenants. Thanks to @omarghader for the pull request. See this issue.

  • FEATURE: vmagent: add __meta_ec2_availability_zone_id label to discovered Amazon EC2 targets. This label is available in Prometheus starting from v2.29.

  • FEATURE: vmagent: add __meta_gce_interface_ipv4_<name> labels to discovered GCE targets. These labels are available in Prometheus starting from v2.29.

  • FEATURE: add -search.maxSamplesPerSeries command-line flag for limiting the number of raw samples a single query can process per each time series. This option can protect from out of memory errors when a query processes tens of millions of raw samples per series. See this issue.

  • FEATURE: add -search.maxSamplesPerQuery command-line flag for limiting the number of raw samples a single query can process across all the time series. This option can protect from heavy queries, which select too big number of raw samples. Thanks to @jiangxinlingdu for the initial pull request.

  • FEATURE: improve performance for queries that process big number of time series and/or samples on systems with big number of CPU cores.

  • FEATURE: vmalert: expose vmalert_alerting_rules_last_evaluation_samples and vmalert_recording_rules_last_evaluation_samples metrics. See this issue.

  • FEATURE: vminsert: expose vm_rpc_send_duration_seconds_total counter, which can be used for determining high saturation of every vminsert -> vmstorage link with an alerting query rate(vm_rpc_send_duration_seconds_total) > 0.9s. This query triggers when the link is saturated by more than 90%. This usually means that more vminsert or vmstorage nodes must be added to the cluster in order to increase the total number of vminsert -> vmstorage links.

  • FEATURE: vmagent: expose vmagent_remotewrite_send_duration_seconds_total counter, which can be used for determining high saturation of every connection to remote storage with an alerting query rate(vmagent_remotewrite_send_duration_seconds_total) > 0.9s. This query triggers when a connection is saturated by more than 90%. This usually means that -remoteWrite.queues command-line flag must be increased in order to increase the number of connections per each remote storage.

  • FEATURE: vmui: automatically fill Server URL field. See this issue.

  • BUGFIX: fix corner cases for queries on time ranges exceeding 40 days. Previously some series can be missing in query results. See this issue.

  • BUGFIX: vmselect: return dummy response at /rules page in the same way as for /api/v1/rules page. The /rules page is requested by Grafana 8. See this issue for details.

  • BUGFIX: vmbackup: automatically set default us-east-1 S3 region if it is missing. This should simplify using S3-compatible services such as MinIO for backups. See this issue.

  • BUGFIX: vmselect: prevent from possible deadlock when multiple target query args are passed to Graphite Render API.

  • BUGFIX: return series with a op b labels and N values for (a op b) default N if (a op b) returns series with all NaN values. Previously such series were removed.

  • BUGFIX: vmui: fix layout when the query selects more than 27 time series. See this issue.

  • BUGFIX: vmagent: restore highlighting in red for DOWN targets at /targets page. See this issue.

v1.63.0

Released at 2021-07-15

  • FEATURE: reduce memory usage by up to 30% on production workloads.

  • FEATURE: vmselect: embed vmui into a single-node VictoriaMetrics and into vmselect component of cluster version. See this feature request. The web interface is available at the following paths:

    • /vmui/ for a single-node VictoriaMetrics
    • /select/<accountID>/vmui/ for vmselect at cluster version of VictoriaMetrics

  • FEATURE: support durations anywhere in MetricsQL queries. For example, sum_over_time(m[1h]) / 1h is a valid query, which is equivalent to sum_over_time(m[1h]) / 3600.

  • FEATURE: support durations without suffixes in MetricsQL queries. For example, rate(m[3600]) is a valid query, which is equivalent to rate(m[1h]).

  • FEATURE: export vmselect_request_duration_seconds and vminsert_request_duration_seconds VictoriaMetrics histograms at /metrics page. These histograms can be used for determining latency distribution and SLI/SLO for the served requests. For example, the following query would return the percent of queries that took less than 500ms during the last hour: histogram_share(500ms, sum(rate(vmselect_request_duration_seconds_bucket[1h])) by (vmrange)).

  • FEATURE: vmagent: dynamically reload client TLS certificates from disk on every mTLS connection. This should allow using vmagent with Istio service mesh. See this feature request.

  • FEATURE: log http request path plus all the query args on errors during request processing. Previously only http request path was logged without query args, so it could be hard debugging such errors.

  • FEATURE: add is_set label to flag metrics. This allows determining explicitly set command-line flags with the query flag{is_set="true"}.

  • FEATURE: add ability to remove caches stored inside <-storageDataPath>/cache on startup if reset_cache_on_startup file is present there. See this feature request.

  • BUGFIX: vmagent: remove { %space %} typo in /targets output. The typo has been introduced in v1.62.0. See this issue.

  • BUGFIX: vmagent: fix CSS styles on /targets page. See this issue.

  • BUGFIX: vmalert: accept Prometheus-like durations in interval config option inside group section. See this issue.

  • BUGFIX: properly update vm_merge_need_free_disk_space metric at /metrics page when there is no enough free disk space for performing optimal merges. See this issue.

v1.62.0

Released at 2021-06-25

  • FEATURE: vmagent: add service discovery for Docker (aka docker_sd_config). See this pull request.

  • FEATURE: vmagent: add service discovery for DigitalOcean (aka digitalocean_sd_config). See this feature request.

  • FEATURE: vmagent: change the default value for -remoteWrite.queues from 4 to 2 * numCPUs. This should reduce scrape duration for highly loaded vmagent, which scrapes tens of thousands of targets. See this pull request.

  • FEATURE: vmagent: show the number of samples the target returns during the last scrape on /targets and /api/v1/targets pages. This should simplify debugging targets, which may return too big or too low number of samples. See this feature request.

  • FEATURE: vmagent: show jobs with zero discovered targets on /targets page. This should help debugging improperly configured scrape configs.

  • FEATURE: vmagent: support for http-based service discovery (aka http_sd_config), which has been added since Prometheus 2.28. See this feature request.

  • FEATURE: vmagent: support namespace in Consul service discovery in the same way as Prometheus 2.28 does. See this issue for details.

  • FEATURE: vmagent: support generic auth configs in consul_sd_configs in the same way as Prometheus 2.28 does. See this issue for details.

  • FEATURE: vmctl: limit the number of samples per each imported JSON line. This should limit the memory usage at VictoriaMetrics side when importing time series with big number of samples.

  • FEATURE: vmselect: log slow queries across all the /api/v1/* handlers (aka Prometheus query API) if their execution duration exceeds -search.logSlowQueryDuration. This should simplify debugging slow requests to such handlers as /api/v1/labels or /api/v1/series additionally to /api/v1/query and /api/v1/query_range, which were logged in the previous releases.

  • FEATURE: vminsert: sort the -storageNode list in order to guarantee the identical series -> vmstorage mapping across all the vminsert nodes. This should reduce resource usage (RAM, CPU and disk IO) at vmstorage nodes if vmstorage addresses are passed in random order to vminsert nodes.

  • FEATURE: vmstorage: reduce memory usage on a system with many CPU cores under high ingestion rate.

  • BUGFIX: prevent from adding new samples to deleted time series after the rotation of the inverted index (the rotation is performed once per -retentionPeriod). See this comment for details.

  • BUGFIX: vmstorage: reduce high disk write IO usage on systems with big number of CPU cores. The issue has been introduced in the release v1.59.0. See this commit and this comment for details.

  • BUGFIX: vmstorage: prevent from incorrect stats collection when multiple concurrent queries execute the same tag filter. This may help reducing CPU usage under certain workloads. See this issue.

  • BUGFIX: vmselect: return the last timestamp for the max / min value from tmax_over_time(m[d]) and tmin_over_time(m[d]) MetricsQL functions as most users expect. See also this issue.

  • BUGFIX: vmselect: return the expected value for increase_pure() MetricsQL function after a gap in a time series. Previously incorrect too big value could be returned after the gap from increase_pure().

v1.61.1

Released at 2021-06-11

  • BUGFIX: vmalert: fix recording rules, which were broken in v1.61.0. See this issue.
  • BUGFIX: reset the on-disk cache for mapping from the full metric name to an internal metric id (e.g. metric_name{labels} -> internal_metric_id) after deleting metrics via delete API. This should prevent from possible inconsistent state after unclean shutdown. This this issue.

v1.61.0

Released at 2021-06-09

  • FEATURE: vmalert: add support for backfilling (aka replay) of recording and alerting rules. See these docs and this feature request.

  • FEATURE: vmalert: add a command-line flag -rule.configCheckInterval for automatic re-reading of -rule files without the need to send SIGHUP signal. See this issue.

  • FEATURE: vmagent: respect the sample_limit and -promscrape.maxScrapeSize values when scraping targets in stream parsing mode. See this pull request.

  • FEATURE: vmauth: add ability to specify mutliple url_prefix entries for balancing the load among multiple vmselect and/or vminsert nodes in a cluster. See these docs.

  • FEATURE: vminsert: add -disableRerouting command-line flag for forcibly disabling the rerouting. This should help resolving this and this issues.

  • FEATURE: vminsert: reduce the probability of global re-routing storm if all the vmstorage nodes cannot keep up with the given ingestion rate for some time. This should improve cluster stability in such cases. See this and this issues.

  • FEATURE: allow building VictoriaMetrics components for Solaris / SmartOS. See this issue.

  • FEATURE: vmagent: add ability to debug relabeling rules. See these docs and this issue.

  • BUGFIX: reduce CPU usage by up to 2x during querying a database with big number of active daily time series. The issue has been introduced in v1.59.0.

  • BUGFIX: vmagent: properly apply auth and tls configs in eureka_sd_configs. See this pull request.

  • BUGFIX: vmauth: do not panic on aborted http requests. See this issue.

  • BUGFIX: properly generate target property for *Series(foo.*.bar) responses returned from Graphite Render API. Previously the target contained the expanded list of series for foo.*.bar, e.g. sumSeries(foo.a.bar,foo.b.bar,...foo.z.bar). Now VictoriaMetrics returns sumSeries(foo.*.bar) as a target in the same way as Graphite does.

v1.60.0

Released at 2021-05-24

  • FEATURE: add ability to limit the number of unique time series, which can be added to storage per hour and per day. This can help dealing with high cardinality and high churn rate issues. See these docs.

  • FEATURE: vmagent: add ability to limit the number of unique time series, which can be sent to remote storage systems per hour and per day. This can help dealing with high cardinality and high churn rate issues. See these docs.

  • FEATURE: vmalert: add ability to run alerting and recording rules for multiple tenants. See this issue and these docs.

  • FEATURE: vminsert: add support for data ingestion via other vminsert nodes. This allows building multi-level data ingestion paths in VictoriaMetrics cluster by writing data from one level of vminsert nodes to another level of vminsert nodes. See these docs and this comment for details.

  • FEATURE: vmagent: reload bearer_token_file, credentials_file and password_file contents every second. This allows dynamically changing the contents of these files during target scraping and service discovery without the need to restart vmagent. See this issue.

  • FEATURE: vmalert: add a flag to control behaviour on startup for state restore errors. Such errors were returned and logged before as well. Now user can specify whether to just log these errors (-remoteRead.ignoreRestoreErrors=true) or to stop the process (-remoteRead.ignoreRestoreErrors=false). The latter is important when VM isn't ready yet to serve queries from vmalert and it needs to wait. See this issue.

  • FEATURE: vmalert: add ability to pass round_digits query arg to datasource via -datasource.roundDigits command-line flag. This can be used for limiting the number of decimal digits after the point in recording rule results. See this issue.

  • FEATURE: return X-Server-Hostname header in http responses of all the VictoriaMetrics components. This should simplify tracing the origin server behind a load balancer or behind auth proxy during troubleshooting.

  • FEATURE: vmselect: allow to use 2x more memory for query processing at vmselect nodes in VictoriaMetrics cluster. This should allow processing heavy queries without the need to increase RAM size at vmselect nodes.

  • FEATURE: add ability to filter /api/v1/status/tsdb output with arbitrary time series selectors passed via match[] query args. See these docs and this issue for details.

  • FEATURE: automatically detect memory and cpu limits for VictoriaMetrics components running under cgroup v2 environments such as HashiCorp Nomad. See this issue.

  • FEATURE: vmauth: allow -auth.config reloading via /-/reload http endpoint. See this issue.

  • FEATURE: add timezone_offset(tz) function. It returns offset in seconds for the given timezone tz relative to UTC. This can be useful when combining with datetime-related functions. For example, day_of_week(time()+timezone_offset("America/Los_Angeles")) would return weekdays for America/Los_Angeles time zone. Special Local time zone can be used for returning an offset for the time zone set on the host where VictoriaMetrics runs. See this issue and MetricsQL docs for more details.

  • FEATURE: vmagent: add support for OAuth2 authorization for scrape targets and service discovery in the same way as Prometheus does. See these docs.

  • FEATURE: vmagent: add support for OAuth2 authorization when writing data to -remoteWrite.url. See -remoteWrite.oauth2.* config params in /path/to/vmagent -help output.

  • FEATURE: vmalert: add ability to set extra_filter_labels at alerting and recording group configs. See these docs.

  • FEATURE: vmstorage: reduce memory usage by up to 30% when ingesting big number of active time series.

  • BUGFIX: vmagent: do not retry scraping targets, which don't support HTTP. This should reduce CPU load and network usage at vmagent and at scrape target. See this issue.

  • BUGFIX: vmagent: fix possible race when refreshing role: endpoints and role: endpointslices scrape targets in kubernetes_sd_config. Previously pod objects could be updated after the related endpoints object update. This could lead to missing scrape targets. See this issue.

  • BUGFIX: vmagent: properly spread scrape targets among vmagent replicas if -promscrape.cluster.replicationFactor exceeds 1. See this pull request.

  • BUGFIX: vmagent: limit scrape_timeout by scrape_interval. This guarantees that only a single sample is lost during the configured scrape_interval when scrape target responds slowly. See this comment for details.

  • BUGFIX: properly remove stale parts outside the configured retention if -retentionPeriod is smaller than one month. Previously stale parts could remain active for up to a month after they go outside the retention.

  • BUGFIX: stop the process on panic errors, since such errors may leave the process in inconsistent state. Previously panics could be recovered, which could result in unexpected hard-to-debug further behavior of running process.

  • BUGFIX: vminsert, vmagent: make sure data ingestion connections are closed before completing graceful shutdown. Previously the connection may remain open, which could result in trailing samples loss.

  • BUGFIX: vmauth, vmalert: properly re-use HTTP keep-alive connections to backends and datasources. Previously only 2 keep-alive connections per backend could be re-used. Other connections were closed after the first request. See this issue for details.

  • BUGFIX: vmalert: fix false positive error result contains metrics with the same labelset after applying rule labels, which could be triggered when recording rules generate unique metrics. See this issue.

  • BUGFIX: vmctl: properly import InfluxDB rows if they have a field and a tag with identical names. See this issue.

  • BUGFIX: properly reload configs if SIGHUP signal arrives during service initialization. Previously such SIGHUP signal could be ignored and configs weren't reloaded.

  • BUGFIX: vmalert: properly import default rules from OpenShift. See this issue.

  • BUGFIX: reduce the probability of the removal queue is full panic when highly loaded VictoriaMetrics stores data on NFS. See this issue.

v1.59.0

Released at 2021-05-01

  • FEATURE: improved new time series registration speed on systems with many CPU cores. See this issue. Thanks to @waldoweng for the idea and draft implementation.

  • FEATURE: vmalert: use the same technique as Grafana for determining evaluation timestamps for recording rules. This should make consistent graphs for series generated by recording rules compared to graphs generated for queries from recording rules in Grafana. See this issue.

  • FEATURE: vmauth: add ability to set mandatory query args in url_prefix. For example, url_prefix: http://vm:8428/?extra_label=team=dev would add extra_label=team=dev query arg to all the incoming requests. See the example for more details.

  • FEATURE: vmctl: add OpenTSDB migration option. See more details here. Thanks to @johnseekins!

  • FEATURE: log metrics with dropped labels if the number of labels in the ingested metric exceeds -maxLabelsPerTimeseries. This should simplify debugging for this case.

  • FEATURE: vmagent: list user-visible endpoints at http://vmagent:8429/. See this issue.

  • BUGFIX: vmagent: properly update role: endpoints and role: endpointslices scrape targets if the underlying service objects are updated in kubernetes_sd_config. See this issue.

  • BUGFIX: vmagent: apply scrape_timeout on receiving the first response byte from stream_parse: true scrape targets. Previously it was applied to receiving and processing the full response stream. This could result in false timeout errors when scrape target exposes millions of metrics as described here.

  • BUGFIX: vmagent: eliminate possible data race when obtaining value for the metric vm_persistentqueue_bytes_pending. The data race could result in incorrect value for this metric.

  • BUGFIX: vmstorage: remove empty directories on startup. Such directories can be left after unclean shutdown on NFS storage. Previously such directories could lead to crashloop until manually removed. See this issue.

v1.58.0

Released at 2021-04-08

  • FEATURE: vminsert and vmagent: add -sortLabels command-line flag for sorting metric labels before pushing them to vmstorage. This should reduce the size of MetricName -> internal_series_id cache (aka vm_cache_size_bytes{type="storage/tsid"}) when ingesting samples for the same time series with distinct order of labels. For example, foo{k1="v1",k2="v2"} and foo{k2="v2",k1="v1"} represent a single time series. Labels sorting is disabled by default, since the majority of established exporters preserve the order of labels for the exported metrics.

  • FEATURE: allow specifying label value alongside label name for the others sum time series returned from topk_* and bottomk_* functions from MetricsQL. For example, topk_avg(3, max(process_resident_memory_bytes) by (instance), "instance=other_sum") would return top 3 series from max(process_resident_memory_bytes) by (instance) plus a series containing the sum of other series. The others sum series will have {instance="other_sum"} label.

  • FEATURE: do not delete dst_label when applying label_copy(q, "src_label", "dst_label") and label_move(q, "src_label", "dst_label") to series without src_label and with non-empty dst_label. See more details at MetricsQL docs.

  • FEATURE: update Go builder from v1.16.2 to v1.16.3. This should fix these issues.

  • FEATURE: vmagent: add support for follow_redirects option to scrape_configs section in the same way as Prometheus 2.26 does.

  • FEATURE: vmagent: add support for authorization section in -promscrape.config in the same way as Prometheus 2.26 does.

  • FEATURE: vmagent: add support for socks5 proxy in proxy_url config option. See this issue.

  • FEATURE: vmagent: add support for socks5 over tls proxy in proxy_url config option. It can be set up with the following config: proxy_url: "tls+socks5://proxy-addr:port".

  • FEATURE: vmagent: reduce memory usage when -remoteWrite.queues is set to a big value. See this issue.

  • FEATURE: vmagent: add AWS IAM roles for tasks support for EC2 service discovery according to these docs.

  • FEATURE: vmagent: add support for proxy_tls_config, proxy_authorization, proxy_basic_auth, proxy_bearer_token and proxy_bearer_token_file options in consul_sd_config, dockerswarm_sd_config and eureka_sd_config sections.

  • FEATURE: vmagent: pass X-Prometheus-Scrape-Timeout-Seconds header to scrape targets as Prometheus does. In this case scrape targets can limit the time needed for performing the scrape. See this comment for details.

  • FEATURE: vmagent: drop corrupted persistent queue files at -remoteWrite.tmpDataPath instead of throwing a fatal error. Corrupted files can appear after unclean shutdown of vmagent such as OOM kill or hardware reset. See this issue.

  • FEATURE: vmauth: add support for authorization via bearer token. See the docs for details.

  • FEATURE: publish arm64 and amd64 binaries for cluster version of VictoriaMetrics at releases page.

  • BUGFIX: properly handle /api/v1/labels and /api/v1/label/<label_name>/values queries on big start ... end time range. This should fix big resource usage when VictoriaMetrics is queried with Promxy v0.0.62 or newer versions.

  • BUGFIX: do not break sort order for series returned from topk*, bottomk* and outliersk MetricsQL functions. See this issue.

  • BUGFIX: vmagent: properly work with simple HTTP proxies which don't support CONNECT method. For example, PushProx. See this issue.

  • BUGFIX: vmagent: properly discover targets if multiple namespace selectors are put inside kubernetes_sd_config. See this issue.

  • BUGFIX: vmagent: properly discover role: endpoints and role: endpointslices targets in kubernetes_sd_config. See this issue.

  • BUGFIX: properly generate filename for *.tar.gz archive inside _checksums.txt file posted at releases page. See this issue.

v1.57.1

Released at 2021-03-30

  • FEATURE: publish vmutils for GOOS=arm on releases page.

  • BUGFIX: prevent from possible incomplete query results after timed out query.

  • BUGFIX: vmselect: remove -search.storageTimeout command-line flag, since it has the same meaning as -search.maxQueryDuration. See this issue.

  • BUGFIX: vminsert: return back type label to per-tenant metric vm_tenant_inserted_rows_total. See this issue.

v1.57.0

Released at 2021-03-29

  • FEATURE: optimize query performance by up to 10x on systems with many CPU cores. See this tweet.

  • FEATURE: add the following metrics at /metrics page for every VictoriaMetrics app:

    • process_resident_memory_anon_bytes - RSS share for memory allocated by the process itself. This share cannot be freed by the OS, so it must be taken into account by OOM killer.
    • process_resident_memory_file_bytes - RSS share for page cache memory (aka memory-mapped files). This share can be freed by the OS at any time, so it must be ignored by OOM killer.
    • process_resident_memory_shared_bytes - RSS share for memory shared with other processes (aka shared memory). This share can be freed by the OS at any time, so it must be ignored by OOM killer.
    • process_resident_memory_peak_bytes - peak RSS usage for the process.
    • process_virtual_memory_peak_bytes - peak virtual memory usage for the process.

  • FEATURE: accept and enforce extra_label=<label_name>=<label_value> query arg at Graphite APIs.

  • FEATURE: use InfluxDB field as metric name if measurement is empty and -influxSkipSingleField command-line is set. See this issue.

  • FEATURE: vmagent: add -promscrape.consul.waitTime command-line flag for tuning the maximum wait time for Consul service discovery. See this issue.

  • FEATURE: vmagent: add vm_promscrape_discovery_kubernetes_stale_resource_versions_total metric for monitoring the frequency of too old resource version errors during Kubernetes service discovery.

  • FEATURE: single-node VictoriaMetrics: log metrics with timestamps older than -search.cacheTimestampOffset compared to the current time. See these docs for details.

  • BUGFIX: prevent from infinite loop on {__graphite__="..."} filters when a metric name contains *, { or [ chars.

  • BUGFIX: prevent from infinite loop in /metrics/find and /metrics/expand Graphite Metrics API handlers when they match metric names or labels with *, { or [ chars.

  • BUGFIX: do not merge duplicate time series during requests to /api/v1/query. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1141

  • BUGFIX: vmagent: properly handle too old resource version error messages from Kubernetes watch API. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1150

  • BUGFIX: vmagent: do not retry sending data blocks if remote storage returns 400 Bad Request error. The number of dropped blocks due to such errors can be monitored with vmagent_remotewrite_packets_dropped_total metrics. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1149

  • BUGFIX: properly calculate summarize and *Series functions in Graphite Render API.

v1.56.0

Released at 2021-03-17

  • FEATURE: add the following functions to MetricsQL:

    • histogram_avg(buckets) - returns the average value for the given buckets.
    • histogram_stdvar(buckets) - returns standard variance for the given buckets.
    • histogram_stddev(buckets) - returns standard deviation for the given buckets.

  • FEATURE: export vm_available_memory_bytes and vm_available_cpu_cores metrics, which show the number of available RAM and available CPU cores for VictoriaMetrics apps.

  • FEATURE: export vm_index_search_duration_seconds histogram, which can be used for troubleshooting time series search performance.

  • FEATURE: vmagent: add ability to replicate scrape targets among vmagent instances in the cluster with -promscrape.cluster.replicationFactor command-line flag. See these docs.

  • FEATURE: vmagent: accept scrape_offset option at scrape_config. This option may be useful when scrapes must start at the specified offset of every scrape interval. See these docs for details.

  • FEATURE: vmagent: support proxy_tls_config, proxy_basic_auth, proxy_bearer_token and proxy_bearer_token_file options at scrape_config section for configuring proxies specified via proxy_url. See these docs.

  • FEATURE: vmauth: allow using regexp paths in url_map. See this issue for details.

  • FEATURE: accept round_digits query arg at /api/v1/query and /api/v1/query_range handlers. This option can be set at Prometheus datasource in Grafana for limiting the number of digits after the decimal point in response values.

  • FEATURE: add -influx.databaseNames command-line flag, which can be used for accepting data from some Telegraf plugins such as fluentd plugin. See this issue.

  • FEATURE: add -logNewSeries command-line flag, which can be used for debugging the source of time series churn rate.

  • FEATURE: publish Windows builds for vmagent, vmalert, vmauth and vmctl at vmutils-windows-*.zip archives at releases page.

  • FEATURE: listen for IPv6 UDP if -enableTCP6 command-line flag is passed to VictoriaMetrics. See this issue.

  • BUGFIX: vmagent: prevent from high CPU usage bug during failing scrapes with small scrape_timeout (less than a few seconds).

  • BUGFIX: vmagent: reduce memory usage when Kubernetes service discovery is used in big number of distinct scrape config jobs by sharing Kubernetes object cache. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1113

  • BUGFIX: vmagent: apply sample_limit only after metric_relabel_configs are applied as Prometheus does. Previously the sample_limit was applied before metrics relabeling.

  • BUGFIX: vmagent: properly apply tls_config, basic_auth and bearer_token to proxy connections if proxy_url option is set. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1116

  • BUGFIX: vmagent: properly scrape targets via https proxy specified in proxy_url if insecure_skip_verify flag isn't set in tls_config section. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1116

  • BUGFIX: avoid duplicate time series error if prometheus_buckets() covers a time range with distinct set of buckets.

  • BUGFIX: prevent exponent overflow when processing extremely small values close to zero such as 2.964393875E-314. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1114

  • BUGFIX: do not include datapoints with a timestamp t-d when returning results from /api/v1/query?query=m[d]&time=t as Prometheus does.

  • BUGFIX: do not crash if a query contains histogram_over_time() function name with uppercase chars. For example, Histogram_Over_Time(m[5m]).

v1.55.1

Released at 2021-03-03

v1.55.0

Released at 2021-03-02

  • FEATURE: add sign(q) and clamp(q, min, max) functions, which are planned to be added in the upcoming Prometheus release . The last_over_time(m[d]) function is already supported in MetricsQL.

  • FEATURE: vmagent: add scrape_align_interval config option, which can be used for aligning scrapes to the beginning of the configured interval. See these docs for details.

  • FEATURE: expose io-related metrics at /metrics page for every VictoriaMetrics component:

    • process_io_read_bytes_total - the number of bytes read via io syscalls such as read and pread
    • process_io_written_bytes_total - the number of bytes written via io syscalls such as write and pwrite
    • process_io_read_syscalls_total - the number of read syscalls such as read and pread
    • process_io_write_syscalls_total - the number of write syscalls such as write and pwrite
    • process_io_storage_read_bytes_total - the number of bytes read from storage layer
    • process_io_storage_written_bytes_total - the number of bytes written to storage layer

  • FEATURE: vmagent: add ability to spread scrape targets among multiple vmagent instances. See these docs and this issue for details.

  • FEATURE: vmagent: use watch API for Kubernetes service discovery. This should reduce load on Kubernetes API server when it tracks big number of objects (for example, 10K pods). This should also reduce the time needed for k8s targets discovery. See this issue for details.

  • FEATURE: vmagent: export vm_promscrape_target_relabel_duration_seconds metric, which can be used for monitoring the time spend on relabeling for discovered targets.

  • FEATURE: vmagent: optimize relabeling performance for common cases.

  • FEATURE: add increase_pure(m[d]) function to MetricsQL. It works the same as increase(m[d]) except of various edge cases. See this issue for details.

  • FEATURE: increase accuracy for buckets_limit(limit, buckets) results for small limit values. See MetricsQL docs for details.

  • FEATURE: vmagent: initial support for Windows build with CGO_ENABLED=0 GOOS=windows go build ./app/vmagent. See this and this issue.

  • FEATURE: vmagent: support WebIdentityToken auth in EC2 service discovery. See this issue for details.

  • FEATURE: vmalert: properly process query params in -datasource.url and -remoteRead.url command-line flags. See this issue for details.

  • BUGFIX: vmagent: properly apply -remoteWrite.rateLimit when -remoteWrite.queues is greater than 1. Previously there was a data race, which could prevent from proper rate limiting.

  • BUGFIX: vmagent: properly perform graceful shutdown on SIGINT and SIGTERM signals. The graceful shutdown has been broken in v1.54.0. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1065

  • BUGFIX: reduce the probability of duplicate time series errors when querying Kubernetes metrics.

  • BUGFIX: properly calculate histogram_quantile() over time series with only a single non-zero bucket with {le="+Inf"}. Previously NaN was returned, now the value for the last bucket before {le="+Inf"} is returned like Prometheus does.

  • BUGFIX: vmselect: do not cache partial query results on timeout when receiving data from vmstorage nodes. See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/1085

  • BUGFIX: properly handle stale NFS file handle error.

  • BUGFIX: properly cache query results when extra_label query arg is used. Previously the cached results could clash for different extra_label values. See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/1095

  • BUGFIX: fix http: superfluous response.WriteHeader call issue. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1078

  • BUGFIX: fix arm64 builds due to the issue in github.com/golang/snappy. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1074

  • BUGFIX: fix index out of range [1024819115206086200] with length 27 panic, which could occur when 1e-9 value is passed to VictoriaMetrics histogram. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1096

  • BUGFIX: fix parsing for Graphite line with empty tags such as foo; 123 456. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1100

  • BUGFIX: unescape only \\, \n and \" in label names when parsing Prometheus text exposition format as Prometheus does. Previously other escape sequences could be improperly unescaped.

v1.54.1

Released at 2021-08-18

  • BUGFIX: properly handle queries containing a filter on metric name plus any number of negative filters and zero non-negative filters. For example, node_cpu_seconds_total{mode!="idle"}. The bug was introduced in v1.54.0.

v1.54.0

Released at 2021-02-18

  • FEATURE: optimize searching for matching metrics for metric{<label_filters>} queries if <label_filters> contains at least a single filter. For example, the query up{job="foobar"} should find the matching time series much faster than previously.

  • FEATURE: reduce execution times for q1 <binary_op> q2 queries by executing q1 and q2 in parallel.

  • FEATURE: switch from Go1.15 to Go1.16 for building prod binaries.

  • FEATURE: single-node VictoriaMetrics now accepts requests to handlers with /prometheus and /graphite prefixes such as /prometheus/api/v1/query. This improves compatibility with handlers from VictoriaMetrics cluster.

  • FEATURE: expose process_open_fds and process_max_fds metrics. These metrics can be used for alerting when process_open_fds reaches process_max_fds. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/402 and https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1037

  • FEATURE: vmalert: add -datasource.appendTypePrefix command-line option for querying both Prometheus and Graphite datasource in cluster version of VictoriaMetrics. See these docs for details.

  • FEATURE: vmauth: add ability to route requests from a single user to multiple destinations depending on the requested paths. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1064

  • FEATURE: remove dependency on external programs such as cat, grep and cut when detecting cpu and memory limits inside Docker or LXC container.

  • FEATURE: vmagent: add __meta_kubernetes_endpoints_label_*, __meta_kubernetes_endpoints_labelpresent_*, __meta_kubernetes_endpoints_annotation_* and __meta_kubernetes_endpoints_annotationpresent_* labels for role: endpoints in Kubernetes service discovery. These labels where added in Prometheus 2.25.

  • FEATURE: reduce the minimum supported retention period for inverted index (aka indexdb) from one month to one day. This should reduce disk space usage for <-storageDataPath>/indexdb folder if -retentionPeriod is set to values smaller than one month.

  • FEATURE: vmselect: export per-tenant metrics vm_vmselect_http_requests_total and vm_vmselect_http_requests_duration_ms_total . Other per-tenant metrics are available as a part of enterprise package. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/932 for details.

  • BUGFIX: properly convert regexp tag filters containing escaped dots to non-regexp tag filters. For example, {foo=~"bar\.baz"} should be converted to {foo="bar.baz"}. Previously it was incorrectly converted to {foo="bar\.baz"}, which could result in missing time series for this tag filter.

  • BUGFIX: do not spam error logs when discovering Docker Swarm targets without dedicated IP. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1028 .

  • BUGFIX: properly embed timezone data into VictoriaMetrics apps. This should fix -loggerTimezone usage inside Docker containers.

  • BUGFIX: properly build Docker images for non-amd64 architectures (arm, arm64, ppc64le, 386) on Docker hub. Previously these images were incorrectly based on amd64 base image, so they didn't work.

  • BUGFIX: vmagent: return back unsent block to the queue during graceful shutdown. Previously this block could be dropped if remote storage is unavailable during vmagent shutdown. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1065 .

v1.53.1

Released at 2021-02-03

  • BUGFIX: vmselect: fix the bug preventing from proper searching by Graphite filter with wildcards such as {__graphite__="foo.*.bar"}.

v1.53.0

Released at 2021-02-03

  • FEATURE: added vmctl tool to VictoriaMetrics release process. Now it is packaged in vmutils-*.tar.gz archive on the releases page. Source code for vmctl tool has been moved from github.com/VictoriaMetrics/vmctl to github.com/VictoriaMetrics/VictoriaMetrics/app/vmctl.

  • FEATURE: added -loggerTimezone command-line flag for adjusting time zone for timestamps in log messages. By default UTC is used.

  • FEATURE: added -search.maxStepForPointsAdjustment command-line flag, which can be used for disabling adjustment for points returned by /api/v1/query_range handler if such points have timestamps closer than -search.latencyOffset to the current time. Such points may contain incomplete data, so they are substituted by the previous values for step query args smaller than one minute by default.

  • FEATURE: vmselect: added ability to use Graphite-compatible filters in MetricsQL via {__graphite__="foo.*.bar"} syntax. This expression is equivalent to {__name__=~"foo[.][^.]*[.]bar"}, but it works faster and it is easier to use when migrating from Graphite to VictoriaMetrics. This feature deprecates the usage of -search.treatDotsAsIsInRegexps command-line flag.

  • FEATURE: vmselect: added ability to set additional label filters, which must be applied during queries. Such label filters can be set via optional extra_label query arg, which is accepted by querying API handlers. For example, the request to /api/v1/query_range?extra_label=tenant_id=123&query=<query> adds {tenant_id="123"} label filter to the given <query>. It is expected that the extra_label query arg is automatically set by auth proxy sitting in front of VictoriaMetrics. Contact us if you need assistance with such a proxy. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1021 .

  • FEATURE: vmalert: added -datasource.queryStep command-line flag for passing optional step query arg to /api/v1/query endpoint. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1025

  • FEATURE: vmalert: added ability to query Graphite datasource when evaluating alerting and recording rules. See these docs for details.

  • FEATURE: vmagent: added -remoteWrite.roundDigits command-line option for rounding metric values to the given number of decimal digits after the point before sending the metric to the corresponding -remoteWrite.url. This option can be used for improving data compression on the remote storage, because values with lower number of decimal digits can be compressed better than values with bigger number of decimal digits.

  • FEATURE: vmagent: added -remoteWrite.rateLimit command-line flag for limiting data transfer rate to -remoteWrite.url. This may be useful when big amounts of buffered data is sent after temporarily unavailability of the remote storage. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1035

  • FEATURE: vmagent: export the following additional metrics, which may be useful during troubleshooting:

    • vm_promscrape_scrapes_failed_per_url_total
    • vm_promscrape_scrapes_skipped_by_sample_limit_per_url_total
    • vm_promscrape_discovery_requests_total
    • vm_promscrape_discovery_retries_total
    • vm_promscrape_scrape_retries_total
    • vm_promscrape_service_discovery_duration_seconds

  • FEATURE: vmselect: initial implementation for Graphite Render API.

  • BUGFIX: vmagent: reduce HTTP reconnection rate for scrape targets. Previously vmagent could erroneously close HTTP keep-alive connections more frequently than needed.

  • BUGFIX: vmagent: retry scrape and service discovery requests when the remote server closes HTTP keep-alive connection. Previously disable_keepalive: true option could be used under scrape_configs section when working with such servers.

v1.52.0

Released at 2021-01-13

Previous releases

See changes for older releases here.