Metric Registrar

Important The Metric Registrar is included with TAS for VMs, and you configure it in the TAS for VMs tile. You do not install and configure Metric Registrar as a separate product tile.

In the Metric Registrar pane, you configure the Metric Registrar. The Metric Registrar allows TAS for VMs to convert structured logs into metrics. It also scrapes metrics endpoints and forwards the metrics to Loggregator.

The Metric Registrar requires the V2 Firehose to be enabled. Ensure that Enable V2 Firehose is selected on the System Logging pane.

If you configure the Metric Registrar, VMware recommends that you also run the Metric Registrar smoke test errand. For more information, see Configure smoke tests.

Deactivate the Metric Registrar

By default, the Metric Registrar is deployed.

To deactivate the Metric Registrar:

1. Select Metric Registrar.

2. Deselect the Deploy Metric Registrar check box.

3. Click Save.

Edit default scraping interval

The scraping interval defines how often the Metric Registrar polls custom metric endpoints. The default is 35 seconds.

To edit the Metric Registrar scraping interval:

1. Select Metric Registrar.

2. Edit the Endpoint scraping interval field.

3. Click Save.

Add blocked tags

To prevent the Metric Registrar from consuming the value of a metric or event tag, you can add the tag to the Blocked tags field. For example, if you tag your metrics with a customer_id, you might want to add customer_id to the list of blocked tags.

By default, the following tags are blocked to prevent interference with other products like App Metrics that use and rely on such tags.

• deployment
• job
• index
• id

To prevent the Metric Registrar from consuming the value of a metric or event tag:

1. Select Metric Registrar.

2. Add the desired tags to the Blocked tags field in a comma-separated list.

3. Click Save.

Edit app instance metrics limit per scraping interval

The App instance metrics limit per scraping interval field defines how many metrics are emitted per app instance per interval. If the number of metrics an app instance generates within a scraping interval exceeds the configured limit, no metrics are emitted. Each individual Prometheus value is counted as one metric, including multiple values within the same metric family. By default, there is no limit.

To configure a metrics limit per scraping interval for app instances:

1. Select Metric Registrar.

2. Edit the App instance metrics limit per scraping interval field.

3. Click Save.