Loop data disks and attaching them to virtual machine insided same bicep

[uky2019]

Hello guys, I must admit I already lost days on trying to write a bicep that would somehow work but things just not add up. I tried searching for similar examples, tried with Chat GPT (not helping it gets lost too) but nothing works so far, I got close a few times but nothing like what I exactly i would like, so:

I am deploying inside same bicep from two to four virtual machines (depends), to which i want to attach Premium SSD V2 disks (creating them inside same bicep file), their configuration varies from machine to machine (IOPS, bandwidth, size, zone, etc). I understand I need to use arrays to build it but just did not find the right approach yet, let me provide what I have and please help me climb out of this hole:

Issue is Premium SSD V2 disk are not allowed to be deployed inline like regular data disks, so I guess you have to create them first and later somehow attach them in "data disk" section of VM.

param disks array = [
  {
    name: '${general.envname}-db01_instance_disk'
    sizeGB: 128
    iops: 5000
    bandwidth: 150
    zone: '1'
  }
  {
    name: '${general.envname}-db01_log_igp_disk'
    sizeGB: 256
    iops: 7000
    bandwidth: 200
    zone: '1'
  }
    {
    name: '${general.envname}-db02_instance_disk'
    sizeGB: 512
    iops: 15000
    bandwidth: 150
    zone: '2'
  }
  {
    name: '${general.envname}-db02_log_igp_disk'
    sizeGB: 256
    iops: 7000
    bandwidth: 200
    zone: '2'
  }
]

//Creates "instance" ssd v2 disks for servers
resource dbdatadisks 'Microsoft.Compute/disks@2023-10-02' = [for disk in disks: {
  name: disk.name
  location: general.location
  sku: {
     name: 'PremiumV2_LRS'
  }
  zones: [
    disk.zone
  ]
  properties: {
    creationData: {
      createOption: 'Empty'
       //logicalSectorSize: disk_sector_size
    }
    diskSizeGB: disk.size
    diskIOPSReadWrite: disk.iops //How much IOPS
    diskMBpsReadWrite: disk.bandwidth //How much bandwidth
    encryption: {
      type: 'EncryptionAtRestWithPlatformKey'
    }
  }
}]

Ok so this part works kind of (although i want to have a single array with all changing parameters which are specific to each virtual machine I am building (name, size, etc...)

Then i get lost how to properly attach this to each virtual machine i am building so correct disk example from DB02 goes to DB02 etc.

Help me first clarify is this this possible to attach to for example two virtual machines i am building from array to (just different array?) or this should all be part of same array...

Lets first clarify this and I can provide more info if initial is a bit confusing :)

Thanks

[uky2019]

I gathered my thoughts a bit more, so what I am having issues with is how to correctly reference loops of SSD V2 disks above, in the loop that is creating the virtual machines:

# array with variables for vm01 and vm02
var vms = [
  {
    ip: network.vm01ip
    name: 'vm01'
    zone: '1'
    ilb: 'vm'
    vmsize: virtualmachines.vm1size
  }
  {
    ip: network.vm02ip
    name: 'vm02'
    zone: '2'
    ilb: 'vm'
    vmsize: virtualmachines.vm2size
  }
]

# creating the NIC from array
resource NICVM 'Microsoft.Network/networkInterfaces@2023-04-01' = [for (vm, index) in vms: { ....

# creating the VMs from array

resource VMS  'Microsoft.Compute/virtualMachines@2023-03-01' = [for (vm, index) in vms: {
  name: '${general.envname}-${vm.name}'
  location: general.location
  zones: [
    vm.zone
  ]
  properties: {
    hardwareProfile: {
      vmSize: vm.vmsize
    }
    osProfile: {
      computerName: '${general.envname}-${vm.name}'
      adminUsername: localadminusername
      adminPassword: adminpassword
       windowsConfiguration: {
         enableAutomaticUpdates: false
          patchSettings: {
             patchMode: 'Manual'
          }
       }
    }
    storageProfile: {
      imageReference: {
        publisher: 'MicrosoftWindowsServer'
        offer: 'WindowsServer'
        sku: '2022-datacenter-azure-edition'
        version: 'latest'
      }
      osDisk: {
        createOption: 'FromImage'
        managedDisk: {
          storageAccountType: 'Premium_LRS'
        }
      }
      dataDisks: [] # WHAT TO DO HERE??
      
    }
    networkProfile: {
      networkInterfaces: [
        {
          id: NICVM[index].id
        }
      ]
    }
  }
}]