Multiple disk from var-file - map

[Manish Garedia]

Is there any way of using map in var-file:

I have something like this in packer.json

      "storage": [

        {

          "disk_size": "{{user `vm-disk-size`}}",

          "disk_thin_provisioned": true

        }

      ],

      "storage": [

        {

          "disk_size": "{{user `vm-disk-size`}}",

          "disk_thin_provisioned": true

        }

      ],

what's the best way to have this in var-file. FYI, I have tried to flatten the json but doesn't work.

[Manish Garedia]

Had to wrong json posted. here's the right one.

      "storage": [

        {

          "disk_size": "{{user `vm-disk-size`}}",

          "disk_thin_provisioned": true

        },

       {

          "disk_size": "{{user `vm-disk-size`}}",

          "disk_thin_provisioned": true

        }

      ],

[Megan Marsh]

var-files only support string variables, not maps. If you want to use map variables, consider upgrading to hcl2 templates.

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[Manish Garedia]

Thanks for the reply!

I have converted now everything to hcl2 templates. Can you please suggest what's the best way to pass storage as a MAP based on if there is going to a single disk or two disk?

source "vsphere-iso" "centos" {

  CPUs = var.vm-cpu-num

  RAM = var.vm-mem-size

  RAM_reserve_all = false

  boot_command = [

    "<tab> inst.text inst.ks=hd:fd0:/${ var.ks-file } <enter><wait>"

  ]

  boot_order = "disk,cdrom,floppy"

  boot_wait = "10s"

  cluster = var.vsphere-cluster

  communicator = "ssh"

  convert_to_template = true

  datastore = var.vsphere-datastore

  disk_controller_type = ["pvscsi"]

  floppy_files = [

    var.ks-file

  ]

  guest_os_type = "centos7_64Guest"

  host = var.vsphere-host

  insecure_connection = "true"

  iso_paths = [

    var.iso_url

  ]

  network_adapters {

      network = var.vsphere-network

      network_card = "vmxnet3"

    }

  notes = "Build via Packer"

  password = var.vsphere-password

  ssh_password = var.ssh_password

  ssh_username = "root"

  storage {

      disk_size = var.vm-disk-size

      disk_thin_provisioned = true

    }

    storage {

        disk_size = var.vm-disk-size2

        disk_thin_provisioned = true

      }

..

build {

  sources = [

    "source.vsphere-iso.centos"

  ]

}

[Manish Garedia]

Here's what I am trying to achieve it.

dynamic "storage" { 

 for_each = var.storage 

 content { 

 disk_size = storage.key disk_thin_provisioned = true }

}

and storage is defined as list variable in variables.pkr.hcl

variable "storage" { default = [] }

Running Packer like this:

packer build -var ks-file='"ks-2disk.cf"' -var storage='"["51200","25600"]"' .

Getting this error at this time: Error: Extra characters after expression

on line 1: (source code not available)

An expression was successfully parsed, but extra characters were found after it.

[Wilken Rivera]

Hi Manish

I believe the double quotes around the list may be the issue here.

Have you tried removing the quotes?

When specifying the list var on the cli you will need to drop the additional quotes so that it is read in as a list. 

-var 'storage=[”51200”,”25600”]’

Also for string list types you should specify the type as `list(string)` as opposed to using a default=[].

variable “storage” {

   type=list(string)

 }

Let me know if that helps. 

On Sep 10, 2020, at 18:15, Manish Garedia <gar...@gmail.com> wrote:

Here's what I am trying to achieve it.

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[Manish Garedia]

Thanks for replying!

I change the variable as you suggested and remove the quotes but now getting this error about disk_size.

variable “storage” {

   type=list(string)

 }

✗ packer build  -var ks-file='"ks-2disk.cf"' -var storage='["51200", "25600"]'  .
Error: 1 error(s) occurred:

* storage[0].'disk_size' is required

  on centos.pkr.hcl line 1:
  (source code not available)

==> Wait completed after 4 microseconds

==> Builds finished but no artifacts were created.

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[Manish Garedia]

I got it working by changing to:

dynamic "storage" { 

 for_each = var.storage 

 content { 

 disk_size = storage.value 

disk_thin_provisioned = true }

}