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eb29ffddc8
Clarify that the "namespace" option is available in version 0.73 and later. Earlier version will error out.
55 lines
2.5 KiB
Markdown
55 lines
2.5 KiB
Markdown
---
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layout: page
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title: "Prometheus"
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description: "Record events in Prometheus."
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date: 2017-06-25 08:00
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sidebar: true
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comments: false
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sharing: true
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logo: prometheus.png
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footer: true
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ha_category: "History"
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ha_release: 0.49
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---
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The `prometheus` component exposes metrics in a format which [Prometheus](https://prometheus.io/) can read.
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To use the `prometheus` component in your installation, add the following to your `configuration.yaml` file:
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```yaml
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# Example configuration.yaml entry
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prometheus:
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```
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Configuration variables:
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- **namespace** (*Optional*): The "namespace" that will be assigned to all the Prometheus metrics. This is the prefix of the metric name. E.g., having `myhass` as the namespace will cause the device tracker metrics to be `myhass_device_tracker_state`, the switch metrics to be `myhass_switch_state` and so on. The default is to not add any prefix to the metrics name. (available in version 0.73.0 and later)
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- **filter** (*Optional*): Filtering directives for the components which should be included or excluded from recording.
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- **exclude** (*Optional*): Excluded from recording.
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- **entities** (*Optional*): The list of entity ids to be excluded from recording.
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- **domains** (*Optional*): The list of domains to be excluded from recording.
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- **include** (*Optional*): Included in recordings. If set, all other entities will not be recorded. Values set by the **exclude** option will prevail.
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- **entities** (*Optional*): The list of entity ids to be included from recordings.
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- **domains** (*Optional*): The list of domains to be included from recordings.
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You can then configure Prometheus to fetch metrics from Home Assistant by adding to its `scrape_configs` configuration.
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```yaml
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# Example Prometheus scrape_configs entry
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- job_name: 'hass'
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scrape_interval: 60s
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metrics_path: /api/prometheus
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params:
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api_password: ['PASSWORD']
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scheme: https
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static_configs:
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- targets: ['HOSTNAME:8123']
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```
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When looking into the metrics on the Prometheus side, there will be:
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- All Home Assistant domains, which can be easily found through the common **namespace** prefix, if defined.
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- The [client library](https://github.com/prometheus/client_python) provided metrics, which are a bunch of **process_\*** and also a single pseudo-metric **python_info** which contains (not as value but as labels) information about the Python version of the client, i.e., the Home Assistant Python interpreter.
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Typically, you will only be interested in the first set of metrics.
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