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Azure Bastion monitoring data reference

  • Article

This article contains all the monitoring reference information for this service.

See Monitor Azure Bastion for details on the data you can collect for and how to use it.

Metrics

This section lists all the automatically collected platform metrics for this service. These metrics are also part of the global list of all platform metrics supported in Azure Monitor.

For information on metric retention, see Azure Monitor Metrics overview.

Note

We don't recommend that your use Classic Metrics.

Supported metrics for microsoft.network/bastionHosts

The following table lists the metrics available for the microsoft.network/bastionHosts resource type.

  • All columns might not be present in every table.
  • Some columns might be beyond the viewing area of the page. Select Expand table to view all available columns.

Table headings

  • Category - The metrics group or classification.
  • Metric - The metric display name as it appears in the Azure portal.
  • Name in REST API - The metric name as referred to in the REST API.
  • Unit - Unit of measure.
  • Aggregation - The default aggregation type. Valid values: Average (Avg), Minimum (Min), Maximum (Max), Total (Sum), Count.
  • Dimensions - Dimensions available for the metric.
  • Time Grains - Intervals at which the metric is sampled. For example, PT1M indicates that the metric is sampled every minute, PT30M every 30 minutes, PT1H every hour, and so on.
  • DS Export- Whether the metric is exportable to Azure Monitor Logs via diagnostic settings. For information on exporting metrics, see Create diagnostic settings in Azure Monitor.

Category: Availability

Metric Name in REST API Unit Aggregation Dimensions Time Grains DS Export
Bastion Communication Status

Communication status shows 1 if all communication is good and 0 if its bad.		 pingmesh Count Average <none> PT1M No

Category: Saturation

Metric Name in REST API Unit Aggregation Dimensions Time Grains DS Export
Total Memory

Total memory stats.		 total Count Average host PT1M Yes
CPU Usage

CPU Usage stats.		 usage_user Count Average cpu, host PT1M No
Memory Usage

Memory Usage stats.		 used Count Average host PT1M Yes

Category: Traffic

Metric Name in REST API Unit Aggregation Dimensions Time Grains DS Export
Session Count

Sessions Count for the Bastion. View in sum and per instance.		 sessions Count Total (Sum), Average host PT5M, PT15M No

Note

The Bastion Communication Status metric only applies to Azure Bastion hosts deployed after November 2020.

Metrics details

The following sections give details about the metrics in the preceding table.

Bastion communication status

You can view the communication status of Azure Bastion, aggregated across all instances comprising the bastion host.

  • A value of 1 indicates that the bastion is available.
  • A value of 0 indicates that the bastion service is unavailable.

Screenshot that shows the communication status metric in the Azure portal.

Bastion communication status is an Availability metric.

Session count

You can view the count of active sessions per bastion instance, aggregated across each session type (RDP and SSH). Each Azure Bastion can support a range of active RDP and SSH sessions. Monitoring this metric helps you to understand if you need to adjust the number of instances running the bastion service. For more information about the session count Azure Bastion can support, see the Azure Bastion FAQ.

The recommended values for this metric's configuration are:

  • Aggregation: Avg
  • Granularity: 5 or 15 minutes
  • Splitting by instances is recommended to get a more accurate count

Screenshot that shows the session count metric in the Azure portal.

Session count is a Traffic metric.

Total memory

You can view the total memory of Azure Bastion, split across each bastion instance.

Screenshot that shows the total memory metric in the Azure portal.

Total memory is a Saturation metric.

CPU usage

You can view the CPU utilization of Azure Bastion, split across each bastion instance. Monitoring this metric helps gauge the availability and capacity of the instances that comprise Azure Bastion.

Screenshot that shows the CPU used metric in the Azure portal.

CPU usage is a Saturation metric.

Memory usage

You can view memory utilization across each bastion instance, split across each bastion instance. Monitoring this metric helps gauge the availability and capacity of the instances that comprise Azure Bastion.

Screenshot that shows the memory used metric in the Azure portal.

Memory usage is a Saturation metric.

Metric dimensions

For information about what metric dimensions are, see Multi-dimensional metrics.

This service has the following dimensions associated with its metrics.

  • cpu
  • host

Resource logs

This section lists the types of resource logs you can collect for this service. The section pulls from the list of all resource logs category types supported in Azure Monitor.

Supported resource logs for microsoft.network/bastionHosts

Category Category display name Log table Supports basic log plan Supports ingestion-time transformation Example queries Costs to export
BastionAuditLogs Bastion Audit Logs MicrosoftAzureBastionAuditLogs

Microsoft Azure Bastion Audit Logs

 No Yes No

Azure Monitor Logs tables

This section lists the Azure Monitor Logs tables relevant to this service, which are available for query by Log Analytics using Kusto queries. The tables contain resource log data and possibly more depending on what is collected and routed to them.

Azure Bastion microsoft.network/bastionHosts

Activity log

The linked table lists the operations that can be recorded in the activity log for this service. These operations are a subset of all the possible resource provider operations in the activity log.

For more information on the schema of activity log entries, see Activity Log schema.

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