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Caution

Grafana Alloy is the new name for our distribution of the OTel collector. Grafana Agent has been deprecated and is in Long-Term Support (LTS) through October 31, 2025. Grafana Agent will reach an End-of-Life (EOL) on November 1, 2025. Read more about why we recommend migrating to Grafana Alloy.

Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.

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Open source

The tools command

The tools command contains command line tooling grouped by Flow component.

Caution

Utilities in this command have no backward compatibility guarantees and may change or be removed between releases.

Subcommands

prometheus.remote_write sample-stats

Usage:

  • AGENT_MODE=flow grafana-agent tools prometheus.remote_write sample-stats [FLAG ...] WAL_DIRECTORY
  • grafana-agent-flow tools prometheus.remote_write sample-stats [FLAG ...] WAL_DIRECTORY

The sample-stats command reads the Write-Ahead Log (WAL) specified by WAL_DIRECTORY and collects information on metric samples within it.

For each metric discovered, sample-stats emits:

  • The timestamp of the oldest sample received for that metric.
  • The timestamp of the newest sample received for that metric.
  • The total number of samples discovered for that metric.

By default, sample-stats will return information for every metric in the WAL. You can pass the --selector flag to filter the reported metrics to a smaller set.

The following flag is supported:

  • --selector: A PromQL label selector to filter data by. (default {})

prometheus.remote_write target-stats

Usage:

  • AGENT_MODE=flow grafana-agent tools prometheus.remote_write target-stats --job JOB --instance INSTANCE WAL_DIRECTORY
  • grafana-agent-flow tools prometheus.remote_write target-stats --job JOB --instance INSTANCE WAL_DIRECTORY

The target-stats command reads the Write-Ahead Log (WAL) specified by WAL_DIRECTORY and collects metric cardinality information for a specific target.

For the target specified by the --job and --instance flags, unique metric names for that target are printed along with the number of series with that metric name.

The following flags are supported:

  • --job: The job label of the target.
  • --instance: The instance label of the target.

The --job and --instance labels are required.

prometheus.remote_write wal-stats

Usage:

  • AGENT_MODE=flow grafana-agent tools prometheus.remote_write wal-stats WAL_DIRECTORY
  • grafana-agent-flow tools prometheus.remote_write wal-stats WAL_DIRECTORY

The wal-stats command reads the Write-Ahead Log (WAL) specified by WAL_DIRECTORY and collects general information about it.

The following information is reported:

  • The timestamp of the oldest sample in the WAL.
  • The timestamp of the newest sample in the WAL.
  • The total number of unique series defined in the WAL.
  • The total number of samples in the WAL.
  • The number of hash collisions detected, if any.
  • The total number of invalid records in the WAL, if any.
  • The most recent WAL checkpoint segment number.
  • The oldest segment number in the WAL.
  • The newest segment number in the WAL.

Additionally, wal-stats reports per-target information, where a target is defined as a unique combination of the job and instance label values. For each target, wal-stats reports the number of series and the number of metric samples associated with that target.

The wal-stats command does not support any flags.