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262 lines
8.6 KiB
Markdown
262 lines
8.6 KiB
Markdown
---
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# sort: 2
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title: Reader
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weight: 2
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menu:
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docs:
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parent: "vmanomaly-components"
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# sort: 2
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weight: 2
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aliases:
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- /anomaly-detection/components/reader.html
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---
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# Reader
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<!--
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There are 4 sources available to read data into VM Anomaly Detection from: VictoriaMetrics, (ND)JSON file, QueryRange, or CSV file. Depending on the data source, different parameters should be specified in the config file in the `reader` section.
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-->
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VictoriaMetrics Anomaly Detection (`vmanomaly`) primarily uses [VmReader](#vm-reader) to ingest data. This reader focuses on fetching time-series data directly from VictoriaMetrics with the help of powerful [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html) expressions for aggregating, filtering and grouping your data, ensuring seamless integration and efficient data handling.
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Future updates will introduce additional readers, expanding the range of data sources `vmanomaly` can work with.
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## VM reader
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### Config parameters
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<table>
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<thead>
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<tr>
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<th>Parameter</th>
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<th>Example</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><code>class</code></td>
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<td><code>"reader.vm.VmReader"</code></td>
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<td>Name of the class needed to enable reading from VictoriaMetrics or Prometheus. VmReader is the default option, if not specified.</td>
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</tr>
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<tr>
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<td><code>queries</code></td>
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<td><code>"ingestion_rate: 'sum(rate(vm_rows_inserted_total[5m])) by (type) > 0'"</code></td>
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<td>PromQL/MetricsQL query to select data in format: <code>QUERY_ALIAS: "QUERY"</code>. As accepted by <code>"/query_range?query=%s"</code>.</td>
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</tr>
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<tr>
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<td><code>datasource_url</code></td>
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<td><code>"http://localhost:8481/"</code></td>
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<td>Datasource URL address</td>
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</tr>
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<tr>
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<td><code>tenant_id</code></td>
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<td><code>"0:0"</code></td>
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<td>For VictoriaMetrics Cluster version only, tenants are identified by accountID or accountID:projectID. See VictoriaMetrics Cluster <a href="https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#multitenancy">multitenancy docs</a></td>
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</tr>
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<tr>
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<td><code>sampling_period</code></td>
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<td><code>"1h"</code></td>
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<td>Optional. Frequency of the points returned. Will be converted to <code>"/query_range?step=%s"</code> param (in seconds).</td>
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</tr>
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<tr>
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<td><code>query_range_path</code></td>
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<td><code>"api/v1/query_range"</code></td>
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<td>Performs PromQL/MetricsQL range query. Default <code>"api/v1/query_range"</code></td>
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</tr>
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<tr>
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<td><code>health_path</code></td>
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<td><code>"health"</code></td>
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<td>Absolute or relative URL address where to check availability of the datasource. Default is <code>"health"</code>.</td>
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</tr>
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<tr>
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<td><code>user</code></td>
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<td><code>"USERNAME"</code></td>
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<td>BasicAuth username</td>
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</tr>
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<tr>
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<td><code>password</code></td>
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<td><code>"PASSWORD"</code></td>
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<td>BasicAuth password</td>
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</tr>
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<tr>
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<td><code>timeout</code></td>
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<td><code>"30s"</code></td>
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<td>Timeout for the requests, passed as a string. Defaults to "30s"</td>
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</tr>
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<tr>
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<td><code>verify_tls</code></td>
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<td><code>"false"</code></td>
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<td>Allows disabling TLS verification of the remote certificate.</td>
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</tr>
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<tr>
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<td><code>bearer_token</code></td>
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<td><code>"token"</code></td>
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<td>Token is passed in the standard format with header: "Authorization: bearer {token}"</td>
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</tr>
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<tr>
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<td><code>extra_filters</code></td>
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<td><code>"[]"</code></td>
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<td>List of strings with series selector. See: <a href="https://docs.victoriametrics.com/#prometheus-querying-api-enhancements">Prometheus querying API enhancements</a></td>
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</tr>
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</tbody>
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</table>
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Config file example:
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```yaml
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reader:
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class: "reader.vm.VmReader"
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datasource_url: "http://localhost:8428/"
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tenant_id: "0:0"
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queries:
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ingestion_rate: 'sum(rate(vm_rows_inserted_total[5m])) by (type) > 0'
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sampling_period: '1m'
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```
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### Healthcheck metrics
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`VmReader` exposes [several healthchecks metrics](./monitoring.html#reader-behaviour-metrics).
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<!--
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# TODO: uncomment and maintain after multimodel config refactor, 2nd priority
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## NDJSON reader
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Accepts data in the same format as <code>/export</code>.
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File content example:
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```
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{"metric":{"__name__":"metric1","job":"vm"},"values":[745487.56,96334.13,277822.84,159596.94],"timestamps":[1640908800000,1640908802000,1640908803000,1640908804000]}
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{"metric":{"__name__":"metric2","job":"vm"},"values":[217822.84,159596.94,745487.56,96334.13],"timestamps":[1640908800000,1640908802000,1640908803000,1640908804000]}
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```
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### Config parameters
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<table>
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<thead>
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<tr>
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<th>Parameter</th>
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<th>Example</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><code>class</code></td>
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<td><code>"reader.ndjson.NdjsonReader"</code></td>
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<td>Name of the class needed to enable reading from JSON line format file.</td>
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</tr>
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<tr>
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<td><code>path</code></td>
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<td><code>"tests/reader/export.ndjson"</code></td>
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<td>Path to file in JSON line format</td>
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</tr>
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</tbody>
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</table>
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Config file example:
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```yaml
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reader:
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class: "reader.ndjson.NdjsonReader"
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path: "tests/reader/export.ndjson"
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```
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## QueryRange
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This datasource is VictoriaMetrics handler for [Prometheus querying API](https://prometheus.io/docs/prometheus/latest/querying/api/).
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[Range query](https://docs.victoriametrics.com/keyConcepts.html#range-query) executes the query expression at the given time range with the given step.
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### Config parameters
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<table>
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<thead>
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<tr>
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<th>Parameter</th>
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<th>Example</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><code>class</code></td>
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<td><code>"reader.query_range.QueryRangeReader"</code></td>
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<td>Name of the class enabling Query Range reader.</td>
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</tr>
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<tr>
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<td><code>path</code></td>
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<td><code>"http://localhost:8428/api/v1/query_range?query=sum(rate(vm_rows_inserted_total[30])) by (type)"</code></td>
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<td>URL with query</td>
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</tr>
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</tbody>
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</table>
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Config file example:
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```yaml
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reader:
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class: "reader.query_range.QueryRangeReader"
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path: "http://localhost:8428/api/v1/query_range?query=sum(rate(vm_rows_inserted_total[30])) by (type)"
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```
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## CSV reader
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### Data format
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File should be in `.csv` format and must contain 2 columns with the names: `timestamp` and `y` - metric's datetimes and values accordinally. Order of the columns doesn't matter.
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* `timestamp` can be represented eather in explicit datetime format like `2021-04-21 05:18:19` or in UNIX time in seconds like `1618982299`.
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* `y` should be a numeric value.
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File content example:
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```
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timestamp,y
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2020-07-12 23:09:05,61.0
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2020-07-13 23:09:05,63.0
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2020-07-14 23:09:05,63.0
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2020-07-15 23:09:05,66.0
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2020-07-20 23:09:05,68.0
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2020-07-21 23:09:05,69.0
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2020-07-22 23:09:05,69.0
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```
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### Config parameters
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<table>
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<thead>
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<tr>
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<th>Parameter</th>
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<th>Type</th>
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<th>Example</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><code>class</code></td>
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<td>str</td>
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<td><code>"reader.csv.CsvReader"</code></td>
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<td>Name of the class enabling CSV reader</td>
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</tr>
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<tr>
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<td><code>path</code></td>
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<td>str</td>
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<td><code>"data/v1/jumpsup.csv"</code></td>
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<td>.csv file location (local path). <b>The file existence is checked during config validation</b></td>
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</tr>
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<tr>
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<td><code>metric_name</code></td>
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<td>str</td>
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<td><code>"value"</code></td>
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<td>Optional. Alias for metric. If not specified, filename without extension will be used. In this example, `jumpsup`.</td>
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</tr>
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</tbody>
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</table>
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Config file example:
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```yaml
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reader:
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class: "reader.csv.CsvReader"
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path: "data/v1/jumpsup.csv"
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metric_name: "value"
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```
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--> |