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Add information for the namespace option (#5152)

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* Add information for the namespace option

This changes includes the information required about the new configuration parameter introduced in home-assistant/home-assistant#13738

* Nesting include/exclude into filter directive

* ✏️ Language tweaks

* Reflecting the optionality of namespace setting
This commit is contained in:
Alex Barcelo 2018-06-28 22:07:40 +02:00 committed by Franck Nijhof
parent 305c6db672
commit b3182334d5
1 changed files with 15 additions and 6 deletions
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21
source/_components/prometheus.markdown
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@ -23,12 +23,14 @@ prometheus:
Configuration variables: Configuration variables:
- **exclude** (*Optional*): Configure which components should be excluded from recording. - **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.
- **entities** (*Optional*): The list of entity ids to be excluded from recording. - **filter** (*Optional*): Filtering directives for the components which should be included or excluded from recording.
- **domains** (*Optional*): The list of domains to be excluded from recording. - **exclude** (*Optional*): Excluded from recording.
- **include** (*Optional*): Configure which components should be included in recordings. If set, all other entities will not be recorded. Values set by the **blacklist** option will prevail. - **entities** (*Optional*): The list of entity ids to be excluded from recording.
- **entities** (*Optional*): The list of entity ids to be included from recordings. - **domains** (*Optional*): The list of domains to be excluded from recording.
- **domains** (*Optional*): The list of domains to be included from recordings. - **include** (*Optional*): Included in recordings. If set, all other entities will not be recorded. Values set by the **exclude** option will prevail.
- **entities** (*Optional*): The list of entity ids to be included from recordings.
- **domains** (*Optional*): The list of domains to be included from recordings.
You can then configure Prometheus to fetch metrics from Home Assistant by adding to its `scrape_configs` configuration. You can then configure Prometheus to fetch metrics from Home Assistant by adding to its `scrape_configs` configuration.
@ -43,3 +45,10 @@ You can then configure Prometheus to fetch metrics from Home Assistant by adding
static_configs: static_configs:
- targets: ['HOSTNAME:8123'] - targets: ['HOSTNAME:8123']
``` ```
When looking into the metrics on the Prometheus side, there will be:
- All Home Assistant domains, which can be easily found through the common **namespace** prefix, if defined.
- 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.
Typically, you will only be interested in the first set of metrics.