Redis cache should have patch schedule configured

Medium Azure General patchschedules-redis-cache-patch-schedule

Applies to

Microsoft.Cache/redis/patchSchedules

What CGPulse checks

A resource passes this rule when scheduleEntriesCount must be greater than 0. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Configure a patch schedule to ensure security updates are applied during maintenance windows. In Azure Portal: Redis Cache > Patch schedule > Add schedule entry. See: https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-administration#schedule-updates

CLI

az redis patch-schedule create --ids "{id}" --schedule-entries "[{dayOfWeek:Saturday,startHourUtc:2,maintenanceWindow:PT5H}]"

Bicep

resource patchSchedule 'Microsoft.Cache/redis/patchSchedules@2023-08-01' = {
  name: 'default'
  parent: redisCache
  properties: {
    scheduleEntries: [{
      dayOfWeek: 'Saturday'
      startHourUtc: 2
      maintenanceWindow: 'PT5H'
    }]
  }
}

Terraform

resource "azurerm_redis_cache" "{name}" {
  name                = "{name}"
  resource_group_name = "{rg}"
  location            = var.location
  capacity            = 0
  family              = "C"
  sku_name            = "Basic"
  patch_schedule {
    day_of_week        = "Saturday"
    start_hour_utc     = 2
    maintenance_window = "PT5H"
  }
}

Compliance frameworks

Cloud Security: Azure Foundations

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