Tagging Strategies for Azure and OCI

# Example PowerShell script to add Owner tag to all VMs
$vms = Get-AzVM
foreach ($vm in $vms) {
 if (-not $vm.Tags.ContainsKey('Owner')) {
 $creator = Get-AzLog -ResourceId $vm.Id -MaxRecord 1 | Where-Object {$_.OperationName.Value -eq 'Microsoft.Compute/virtualMachines/write'}
 if ($creator) {
 $ownerEmail = $creator.Caller
 Update-AzTag -ResourceId $vm.Id -Tag @{'Owner'=$ownerEmail} -Operation Merge
 }
 }
}

# Example Python script to tag OCI instances from audit logs
import oci

# Initialize OCI clients
config = oci.config.from_file()
audit_client = oci.audit.AuditClient(config)
compute_client = oci.core.ComputeClient(config)
identity_client = oci.identity.IdentityClient(config)

# Get compartment ID
compartment_id = config["tenancy"]

# Get instances without CreatedDate tag
instances = compute_client.list_instances(compartment_id).data
for instance in instances:
 if"CreatedDate" not in instance.defined_tags.get("FinOps", {}):
 # Get creation event from audit logs
 events = audit_client.list_events(
 compartment_id=compartment_id,
 start_time=oci.audit.models.TimeRange(
 date_time_greater_than_or_equal_to=oci.util.date_time_utils.get_past_days(30)
 ),
 end_time=oci.util.date_time_utils.now()
 ).data
 
 # Find creation event
 for event in events:
 if event.resource_id == instance.id and"Create" in event.event_name:
 # Add CreatedDate tag
 defined_tags = instance.defined_tags
 if"FinOps" not in defined_tags:
 defined_tags["FinOps"] = {}
 defined_tags["FinOps"]["CreatedDate"] = event.event_time.strftime("%Y-%m-%d")
 
 # Update instance tags
 compute_client.update_instance(
 instance_id=instance.id,
 update_instance_details=oci.core.models.UpdateInstanceDetails(
 defined_tags=defined_tags
 )
 )
 break