Cis Azure Database 6.7

6.7 Ensure server parameter 'log_checkpoints' is set to 'ON' for PostgreSQL server (Automated)

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• Level 1

Description

Enable log_checkpoints on PostgreSQL flexible servers.

Rationale

Enabling log_checkpoints helps the PostgreSQL Database to log each checkpoint, which in turn generates query and error logs. However, access to transaction logs is not supported. Query and error logs can be used to identify, troubleshoot, and repair configuration errors and sub-optimal performance.

Impact

None documented.

Audit Procedure

Audit from Azure Portal

1. Login to Azure Portal using https://portal.azure.com.
2. Go to Azure Database for PostgreSQL servers.
3. For each server, under Settings, click Server parameters.
4. In the filter bar, type log_checkpoints.
5. Ensure that VALUE for log_checkpoints is set to ON.

Audit from Azure CLI

Ensure the below command returns a value of on:

az postgres flexible-server parameter show --resource-group <resourceGroup> --server-name <serverName> --name log_checkpoints

Audit from PowerShell

Ensure the below command returns a Value of on:

Get-AzPostgreSqlFlexibleServerConfiguration -ResourceGroupName <resourceGroup> -ServerName <serverName> -Name log_checkpoints

Audit from Azure Policy

Policy ID: 70be9e12-c935-49ac-9bd8-fd64b85c1f87 Name: 'Log checkpoints should be enabled for PostgreSQL flexible servers'

Expected Result

The log_checkpoints server parameter should be set to ON.

Remediation

Remediate from Azure Portal

1. Login to Azure Portal using https://portal.azure.com.
2. Go to Azure Database for PostgreSQL servers.
3. For each server, under Settings, click Server parameters.
4. In the filter bar, type log_checkpoints.
5. Set the VALUE for log_checkpoints to ON.
6. Click Save.

Remediate from Azure CLI

Use the below command to enable log_checkpoints:

az postgres flexible-server parameter set --resource-group <resourceGroup> --server-name <serverName> --name log_checkpoints --value on

Remediate from PowerShell

Update-AzPostgreSqlFlexibleServerConfiguration -ResourceGroupName <resourceGroup> -ServerName <serverName> -Name log_checkpoints -Value on

Default Value

By default, log_checkpoints is enabled (set to on).

References

1. https://learn.microsoft.com/en-us/rest/api/postgresql/flexibleserver/configurations/list-by-server
2. https://learn.microsoft.com/en-us/azure/postgresql/flexible-server/how-to-configure-server-parameters-using-portal
3. https://learn.microsoft.com/en-us/security/benchmark/azure/mcsb-logging-threat-detection#lt-3-enable-logging-for-security-investigation
4. https://learn.microsoft.com/en-us/azure/postgresql/flexible-server/concepts-logging#configure-logging
5. https://learn.microsoft.com/en-us/powershell/module/az.postgresql/get-azpostgresqlflexibleserverconfiguration
6. https://learn.microsoft.com/en-us/powershell/module/az.postgresql/update-azpostgresqlflexibleserverconfiguration

Profile

• Level 1