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docs: mention that VictoriaMetrics rounds time range to UTC days at /api/v1/labels, /api/v1/label/.../values and /api/v1/series handlers

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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3107
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Aliaksandr Valialkin 2023-03-28 17:00:14 -07:00
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41
docs/README.md
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@ -743,20 +743,45 @@ All the Prometheus querying API handlers can be prepended with `/prometheus` pre
### Prometheus querying API enhancements
VictoriaMetrics accepts optional `extra_label=<label_name>=<label_value>` query arg, which can be used for enforcing additional label filters for queries. For example,
`/api/v1/query_range?extra_label=user_id=123&extra_label=group_id=456&query=<query>` would automatically add `{user_id="123",group_id="456"}` label filters to the given `<query>`. This functionality can be used for limiting the scope of time series visible to the given tenant. It is expected that the `extra_label` query args are automatically set by auth proxy sitting in front of VictoriaMetrics. See [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html) as examples of such proxies.
VictoriaMetrics accepts optional `extra_label=<label_name>=<label_value>` query arg, which can be used
for enforcing additional label filters for queries. For example, `/api/v1/query_range?extra_label=user_id=123&extra_label=group_id=456&query=<query>`
would automatically add `{user_id="123",group_id="456"}` label filters to the given `<query>`.
This functionality can be used for limiting the scope of time series visible to the given tenant.
It is expected that the `extra_label` query args are automatically set by auth proxy sitting in front of VictoriaMetrics.
See [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html) as examples of such proxies.
VictoriaMetrics accepts optional `extra_filters[]=series_selector` query arg, which can be used for enforcing arbitrary label filters for queries. For example,
`/api/v1/query_range?extra_filters[]={env=~"prod|staging",user="xyz"}&query=<query>` would automatically add `{env=~"prod|staging",user="xyz"}` label filters to the given `<query>`. This functionality can be used for limiting the scope of time series visible to the given tenant. It is expected that the `extra_filters[]` query args are automatically set by auth proxy sitting in front of VictoriaMetrics. See [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html) as examples of such proxies.
VictoriaMetrics accepts optional `extra_filters[]=series_selector` query arg, which can be used for enforcing arbitrary label filters for queries.
For example, `/api/v1/query_range?extra_filters[]={env=~"prod|staging",user="xyz"}&query=<query>` would automatically
add `{env=~"prod|staging",user="xyz"}` label filters to the given `<query>`. This functionality can be used for limiting
the scope of time series visible to the given tenant. It is expected that the `extra_filters[]` query args are automatically
set by auth proxy sitting in front of VictoriaMetrics.
See [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html) as examples of such proxies.
VictoriaMetrics accepts multiple formats for `time`, `start` and `end` query args - see [these docs](#timestamp-formats).
VictoriaMetrics accepts `round_digits` query arg for `/api/v1/query` and `/api/v1/query_range` handlers. It can be used for rounding response values to the given number of digits after the decimal point. For example, `/api/v1/query?query=avg_over_time(temperature[1h])&round_digits=2` would round response values to up to two digits after the decimal point.
VictoriaMetrics accepts `round_digits` query arg for [/api/v1/query](https://docs.victoriametrics.com/keyConcepts.html#instant-query)
and [/api/v1/query_range](https://docs.victoriametrics.com/keyConcepts.html#range-query) handlers. It can be used for rounding response values
to the given number of digits after the decimal point.
For example, `/api/v1/query?query=avg_over_time(temperature[1h])&round_digits=2` would round response values to up to two digits after the decimal point.
VictoriaMetrics accepts `limit` query arg for `/api/v1/labels` and `/api/v1/label/<labelName>/values` handlers for limiting the number of returned entries. For example, the query to `/api/v1/labels?limit=5` returns a sample of up to 5 unique labels, while ignoring the rest of labels. If the provided `limit` value exceeds the corresponding `-search.maxTagKeys` / `-search.maxTagValues` command-line flag values, then limits specified in the command-line flags are used.
VictoriaMetrics accepts `limit` query arg for [/api/v1/labels](https://docs.victoriametrics.com/url-examples.html#apiv1labels)
and [`/api/v1/label/<labelName>/values`](https://docs.victoriametrics.com/url-examples.html#apiv1labelvalues) handlers for limiting the number of returned entries.
For example, the query to `/api/v1/labels?limit=5` returns a sample of up to 5 unique labels, while ignoring the rest of labels.
If the provided `limit` value exceeds the corresponding `-search.maxTagKeys` / `-search.maxTagValues` command-line flag values,
then limits specified in the command-line flags are used.
By default, VictoriaMetrics returns time series for the last 5 minutes from `/api/v1/series`, `/api/v1/labels` and `/api/v1/label/<labelName>/values` while the Prometheus API defaults to all time. Explicitly set `start` and `end` to select the desired time range.
VictoriaMetrics accepts `limit` query arg for `/api/v1/series` handlers for limiting the number of returned entries. For example, the query to `/api/v1/series?limit=5` returns a sample of up to 5 series, while ignoring the rest. If the provided `limit` value exceeds the corresponding `-search.maxSeries` command-line flag values, then limits specified in the command-line flags are used.
By default, VictoriaMetrics returns time series for the last day starting at 00:00 UTC
from [/api/v1/series](https://docs.victoriametrics.com/url-examples.html#apiv1series),
[/api/v1/labels](https://docs.victoriametrics.com/url-examples.html#apiv1labels) and
[`/api/v1/label/<labelName>/values`](https://docs.victoriametrics.com/url-examples.html#apiv1labelvalues),
while the Prometheus API defaults to all time. Explicitly set `start` and `end` to select the desired time range.
VictoriaMetrics rounds the specified `start..end` time range to day granularity because of performance optimization concerns.
If you need the exact set of label names and label values on the given time range, then send queries
to [/api/v1/query](https://docs.victoriametrics.com/keyConcepts.html#instant-query) or to [/api/v1/query_range](https://docs.victoriametrics.com/keyConcepts.html#range-query).
VictoriaMetrics accepts `limit` query arg at [/api/v1/series](https://docs.victoriametrics.com/url-examples.html#apiv1series)
for limiting the number of returned entries. For example, the query to `/api/v1/series?limit=5` returns a sample of up to 5 series, while ignoring the rest of series.
If the provided `limit` value exceeds the corresponding `-search.maxSeries` command-line flag values, then limits specified in the command-line flags are used.
Additionally, VictoriaMetrics provides the following handlers:

41
docs/Single-server-VictoriaMetrics.md
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@ -746,20 +746,45 @@ All the Prometheus querying API handlers can be prepended with `/prometheus` pre
### Prometheus querying API enhancements
VictoriaMetrics accepts optional `extra_label=<label_name>=<label_value>` query arg, which can be used for enforcing additional label filters for queries. For example,
`/api/v1/query_range?extra_label=user_id=123&extra_label=group_id=456&query=<query>` would automatically add `{user_id="123",group_id="456"}` label filters to the given `<query>`. This functionality can be used for limiting the scope of time series visible to the given tenant. It is expected that the `extra_label` query args are automatically set by auth proxy sitting in front of VictoriaMetrics. See [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html) as examples of such proxies.
VictoriaMetrics accepts optional `extra_label=<label_name>=<label_value>` query arg, which can be used
for enforcing additional label filters for queries. For example, `/api/v1/query_range?extra_label=user_id=123&extra_label=group_id=456&query=<query>`
would automatically add `{user_id="123",group_id="456"}` label filters to the given `<query>`.
This functionality can be used for limiting the scope of time series visible to the given tenant.
It is expected that the `extra_label` query args are automatically set by auth proxy sitting in front of VictoriaMetrics.
See [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html) as examples of such proxies.
VictoriaMetrics accepts optional `extra_filters[]=series_selector` query arg, which can be used for enforcing arbitrary label filters for queries. For example,
`/api/v1/query_range?extra_filters[]={env=~"prod|staging",user="xyz"}&query=<query>` would automatically add `{env=~"prod|staging",user="xyz"}` label filters to the given `<query>`. This functionality can be used for limiting the scope of time series visible to the given tenant. It is expected that the `extra_filters[]` query args are automatically set by auth proxy sitting in front of VictoriaMetrics. See [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html) as examples of such proxies.
VictoriaMetrics accepts optional `extra_filters[]=series_selector` query arg, which can be used for enforcing arbitrary label filters for queries.
For example, `/api/v1/query_range?extra_filters[]={env=~"prod|staging",user="xyz"}&query=<query>` would automatically
add `{env=~"prod|staging",user="xyz"}` label filters to the given `<query>`. This functionality can be used for limiting
the scope of time series visible to the given tenant. It is expected that the `extra_filters[]` query args are automatically
set by auth proxy sitting in front of VictoriaMetrics.
See [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html) as examples of such proxies.
VictoriaMetrics accepts multiple formats for `time`, `start` and `end` query args - see [these docs](#timestamp-formats).
VictoriaMetrics accepts `round_digits` query arg for `/api/v1/query` and `/api/v1/query_range` handlers. It can be used for rounding response values to the given number of digits after the decimal point. For example, `/api/v1/query?query=avg_over_time(temperature[1h])&round_digits=2` would round response values to up to two digits after the decimal point.
VictoriaMetrics accepts `round_digits` query arg for [/api/v1/query](https://docs.victoriametrics.com/keyConcepts.html#instant-query)
and [/api/v1/query_range](https://docs.victoriametrics.com/keyConcepts.html#range-query) handlers. It can be used for rounding response values
to the given number of digits after the decimal point.
For example, `/api/v1/query?query=avg_over_time(temperature[1h])&round_digits=2` would round response values to up to two digits after the decimal point.
VictoriaMetrics accepts `limit` query arg for `/api/v1/labels` and `/api/v1/label/<labelName>/values` handlers for limiting the number of returned entries. For example, the query to `/api/v1/labels?limit=5` returns a sample of up to 5 unique labels, while ignoring the rest of labels. If the provided `limit` value exceeds the corresponding `-search.maxTagKeys` / `-search.maxTagValues` command-line flag values, then limits specified in the command-line flags are used.
VictoriaMetrics accepts `limit` query arg for [/api/v1/labels](https://docs.victoriametrics.com/url-examples.html#apiv1labels)
and [`/api/v1/label/<labelName>/values`](https://docs.victoriametrics.com/url-examples.html#apiv1labelvalues) handlers for limiting the number of returned entries.
For example, the query to `/api/v1/labels?limit=5` returns a sample of up to 5 unique labels, while ignoring the rest of labels.
If the provided `limit` value exceeds the corresponding `-search.maxTagKeys` / `-search.maxTagValues` command-line flag values,
then limits specified in the command-line flags are used.
By default, VictoriaMetrics returns time series for the last 5 minutes from `/api/v1/series`, `/api/v1/labels` and `/api/v1/label/<labelName>/values` while the Prometheus API defaults to all time. Explicitly set `start` and `end` to select the desired time range.
VictoriaMetrics accepts `limit` query arg for `/api/v1/series` handlers for limiting the number of returned entries. For example, the query to `/api/v1/series?limit=5` returns a sample of up to 5 series, while ignoring the rest. If the provided `limit` value exceeds the corresponding `-search.maxSeries` command-line flag values, then limits specified in the command-line flags are used.
By default, VictoriaMetrics returns time series for the last day starting at 00:00 UTC
from [/api/v1/series](https://docs.victoriametrics.com/url-examples.html#apiv1series),
[/api/v1/labels](https://docs.victoriametrics.com/url-examples.html#apiv1labels) and
[`/api/v1/label/<labelName>/values`](https://docs.victoriametrics.com/url-examples.html#apiv1labelvalues),
while the Prometheus API defaults to all time. Explicitly set `start` and `end` to select the desired time range.
VictoriaMetrics rounds the specified `start..end` time range to day granularity because of performance optimization concerns.
If you need the exact set of label names and label values on the given time range, then send queries
to [/api/v1/query](https://docs.victoriametrics.com/keyConcepts.html#instant-query) or to [/api/v1/query_range](https://docs.victoriametrics.com/keyConcepts.html#range-query).
VictoriaMetrics accepts `limit` query arg at [/api/v1/series](https://docs.victoriametrics.com/url-examples.html#apiv1series)
for limiting the number of returned entries. For example, the query to `/api/v1/series?limit=5` returns a sample of up to 5 series, while ignoring the rest of series.
If the provided `limit` value exceeds the corresponding `-search.maxSeries` command-line flag values, then limits specified in the command-line flags are used.
Additionally, VictoriaMetrics provides the following handlers:

9
docs/url-examples.md
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@ -288,7 +288,8 @@ curl http://<vmselect>:8481/select/0/prometheus/api/v1/labels
</div>
By default VictoriaMetrics returns labels seen during the last 5 minutes. An arbitrary time range can be set via `start` and `end` query args.
By default VictoriaMetrics returns labels seen during the last day starting at 00:00 UTC. An arbitrary time range can be set via `start` and `end` query args.
The specified `start..end` time range is rounded to day granularity because of performance optimization concerns.
Additional information:
* [Prometheus querying API usage](https://docs.victoriametrics.com/#prometheus-querying-api-usage)
@ -317,7 +318,8 @@ curl http://<vmselect>:8481/select/0/prometheus/api/v1/label/job/values
</div>
By default VictoriaMetrics returns label values seen during the last 5 minutes. An arbitrary time range can be set via `start` and `end` query args.
By default VictoriaMetrics returns labels values seen during the last day starting at 00:00 UTC. An arbitrary time range can be set via `start` and `end` query args.
The specified `start..end` time range is rounded to day granularity because of performance optimization concerns.
Additional information:
* [Prometheus querying API usage](https://docs.victoriametrics.com/#prometheus-querying-api-usage)
@ -402,7 +404,8 @@ curl http://<vmselect>:8481/select/0/prometheus/api/v1/series -d 'match[]=vm_htt
</div>
By default VictoriaMetrics returns time series seen during the last 5 minutes. An arbitrary time range can be set via `start` and `end` query args.
By default VictoriaMetrics returns time series seen during the last day starting at 00:00 UTC. An arbitrary time range can be set via `start` and `end` query args.
The specified `start..end` time range is rounded to day granularity because of performance optimization concerns.
Additional information:
* [Prometheus querying API usage](https://docs.victoriametrics.com/#prometheus-querying-api-usage)

2
docs/vmagent.md
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@ -1523,7 +1523,7 @@ See the docs at https://docs.victoriametrics.com/vmagent.html .
-remoteWrite.relabelConfig string
Optional path to file with relabeling configs, which are applied to all the metrics before sending them to -remoteWrite.url. See also -remoteWrite.urlRelabelConfig. The path can point either to local file or to http url. See https://docs.victoriametrics.com/vmagent.html#relabeling
-remoteWrite.keepDanglingQueues
Keep persistent queues contents in case there are no matching -remoteWrite.url. Useful when -remoteWrite.url is changed temporarily and persistent queue files will be needed later on.
Keep persistent queues contents at -remoteWrite.tmpDataPath in case there are no matching -remoteWrite.url. Useful when -remoteWrite.url is changed temporarily and persistent queue files will be needed later on.
-remoteWrite.roundDigits array
Round metric values to this number of decimal digits after the point before writing them to remote storage. Examples: -remoteWrite.roundDigits=2 would round 1.236 to 1.24, while -remoteWrite.roundDigits=-1 would round 126.78 to 130. By default digits rounding is disabled. Set it to 100 for disabling it for a particular remote storage. This option may be used for improving data compression for the stored metrics
Supports array of values separated by comma or specified via multiple flags.