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docs: fix key concepts image and links

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Signed-off-by: Artem Navoiev <tenmozes@gmail.com>
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Artem Navoiev 2024-01-26 20:30:29 +01:00 committed by Aliaksandr Valialkin
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docs/keyConcepts.md
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@ -475,7 +475,7 @@ The basic monitoring setup of VictoriaMetrics and vmagent is described
in the [example docker-compose manifest](https://github.com/VictoriaMetrics/VictoriaMetrics/tree/master/deployment/docker).
In this example vmagent [scrapes a list of targets](https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/deployment/docker/prometheus.yml)
and [forwards collected data to VictoriaMetrics](https://github.com/VictoriaMetrics/VictoriaMetrics/blob/9d7da130b5a873be334b38c8d8dec702c9e8fac5/deployment/docker/docker-compose.yml#L15).
VictoriaMetrics is then used as a [datasource for Grafana](https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/deployment/docker/provisioning/datasources/datasource.yml)
VictoriaMetrics is then used as a [datasource for Grafana](https://github.com/VictoriaMetrics/VictoriaMetrics/tree/master/deployment/docker/provisioning/datasources)
installation for querying collected data.
VictoriaMetrics components allow building more advanced topologies. For example, vmagents can push metrics from separate datacenters to the central VictoriaMetrics:
@ -537,12 +537,8 @@ foo_bar 4.00 1652170560000 # 2022-05-10 10:16:00
The data above contains a list of samples for the `foo_bar` time series with time intervals between samples
ranging from 1m to 3m. If we plot this data sample on the graph, it will have the following form:
<p style="text-align: center">
<a href="keyConcepts_data_samples.webp" target="_blank">
<img src="keyConcepts_data_samples.webp" width="500">
</a>
</p>
<img src="keyConcepts_data_samples.webp" width="500">
To get the value of the `foo_bar` series at some specific moment of time, for example `2022-05-10 10:03:00`, in
VictoriaMetrics we need to issue an **instant query**:
@ -575,12 +571,7 @@ In response, VictoriaMetrics returns a single sample-timestamp pair with a value
we'll see that there is no raw sample at `2022-05-10 10:03`. When there is no raw sample at the
requested timestamp, VictoriaMetrics will try to locate the closest sample before the requested timestamp:
<p style="text-align: center">
<a href="keyConcepts_instant_query.webp" target="_blank">
<img src="keyConcepts_instant_query.webp" width="500">
</a>
</p>
<img src="keyConcepts_instant_query.webp" width="500">
The time range in which VictoriaMetrics will try to locate a replacement for a missing data sample is equal to `5m`
by default and can be overridden via the `step` parameter.
@ -712,11 +703,7 @@ see that it contains only 13 raw samples. What happens here is that the range qu
an [instant query](#instant-query) executed `1 + (start-end)/step` times on the time range from `start` to `end`. If we plot
this request in VictoriaMetrics the graph will be shown as the following:
<p style="text-align: center">
<a href="keyConcepts_range_query.webp" target="_blank">
<img src="keyConcepts_range_query.webp" width="500">
</a>
</p>
<img src="keyConcepts_range_query.webp" width="500">
The blue dotted lines in the figure are the moments when the instant query was executed. Since the instant query retains the
ability to return replacements for missing points, the graph contains two types of data points: `real` and `ephemeral`.