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Audit: explain 'failure' metrics better #27955

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Original file line number Diff line number Diff line change
@@ -1,15 +1,17 @@
### vault.audit.log_request_failure ((#vault-audit-log_request_failure))

| Metric type | Value | Description |
|-------------|--------|---------------------------------------------------------|
| counter | number | Number of audit log request failures across all devices |
| Metric type | Value | Description |
|-------------|--------|-------------------------------------------------------------------------------------------|
| gauge | number | Average (mean) number of audit log request failures across all devices during time period |

The number of request failures is a **crucial metric**.

A non-zero value for `vault.audit.log_request_failure` indicates that all your
configured audit devices failed to log a request (or response). If Vault cannot
A non-zero value for `vault.audit.log_request_failure` indicates that all
the configured audit devices failed to log a request (or response). If Vault cannot
properly audit a request, or the response to a request, the original request
will fail.

The `mean` value for this metric should be monitored, not the `count` which could be misleading.

Refer to the Vault logs and any device-specific metrics to troubleshoot the
failing audit log device.
Original file line number Diff line number Diff line change
@@ -1,15 +1,17 @@
### vault.audit.log_response_failure ((#vault-audit-log_response_failure))

| Metric type | Value | Description |
|-------------|--------|---------------------------------------------------------|
| counter | number | Number of audit log response failures across all devices |
| Metric type | Value | Description |
|-------------|--------|--------------------------------------------------------------------------------------------|
| gauge | number | Average (mean) number of audit log response failures across all devices during time period |

The number of request failures is a **crucial metric**.

A non-zero value for `vault.audit.log_response_failure` indicates that all of
the configured audit log devices failed to log a response to a request to Vault. If Vault cannot
A non-zero value for `vault.audit.log_response_failure` indicates that all
the configured audit log devices failed to log a response to a request. If Vault cannot
properly audit a request, or the response to a request, the original request
will fail.

The `mean` value for this metric should be monitored, not the `count` which could be misleading.

Refer to the device-specific metrics and logs to troubleshoot the failing audit
log device.
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