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Documentation Grafana Alloy Reference Command-line interface tools

The tools command

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

Subcommands

prometheus.remote_write sample-stats

Usage:

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alloy tools prometheus.remote_write sample-stats [<FLAG> ...] <WAL_DIRECTORY>

Replace the following:

• <FLAG>: One or more flags that define the input and output of the command.
• <WAL_DIRECTORY>: The 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:

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alloy 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:

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alloy tools prometheus.remote_write wal-stats <WAL_DIRECTORY>

Replace the following:

  * _`<WAL_DIRECTORY>`_: The 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.