Packer build issues on credentials, validate passes

[MDR]

Hello Packer Community -

New to Packer and following a course in Packer. Using Packer 1.7.2 on Ubun 20.10 VM.

Trying to deploy to AWS and I am running under an user I created in AWS which is part of group Administrator and has all privileges. I am running in a vagrant box as it allows me to keep to latest toolsets. This is shown below.

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My packer validate passes but packer build fails:

Error: Datasource.Execute failed: no valid credential sources for  found.

Please see 

for more information about providing credentials.

Error: NoCreentialProviders: no valid providers in chain. Deprecated.

For verbose messaging see aws.Config.CredentialsChainVerboseErrors

  on template.json.pkr.hcl line 21:

  (source code shown below)

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I am using AWS CLI 2 and credentials file + config file are ok.

In fact sts get caller-identitity returns fine.

vagrant@vbUBUNiINFRA1:~$ aws.sts.get-caller-identity

3304XXXX arn:aws:iam::3304XXXX:user/mono-acc.admin XXXXXXXXXXXXX

vagrant@vbUBUNiINFRA1:~$ aws.version

aws-cli/2.2.5 Python/3.8.8 Linux/5.8.0-53-generic exe/x86_64.ubuntu.20 prompt/off

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The file I am trying to validate is as follows:

The ssh-username  (below) is the only thing I change from the example (in book) to the default user in my credentials file based on which sts caller identity runs.

Not sure is ssh-username is the issue and what the ssh-username should be?

line 21 - where error shown occurs - is bolded-italicized

I use the same credentials and config file to run Terraform fine.

Thus I am not understanding as to why a similarly configured Packer templ will not work?

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variable "aws_profile" {

  type    = string

  default = "AWS PROFILE"

}

variable "region" {

  type    = string

  default = "AWS REGION"

}

variable "instance_type" {

  type    = string

  default = "EC2 INSTANCE TYPE"

}

variable "source_ami" {

  type    = string

  default = "AMAZON LINUX AMI ID"

}

data "amazon-ami" "autogenerated_1" {

  filters = {

    name                = "Amazon Linux AMI-*"

    root-device-type    = "ebs"

    virtualization-type = "hvm"

  }

  most_recent = true

  owners      = ["amazon"]

  profile     = "${var.aws_profile}"

  region      = "${var.region}"

}

source "amazon-ebs" "autogenerated_1" {

  ami_description = "Amazon Linux Image with Jenkins Server"

  ami_name        = "jenkins-master-2.204.1"

  instance_type   = "${var.instance_type}"

  profile         = "${var.aws_profile}"

  region          = "${var.region}"

  source_ami      = "${data.amazon-ami.autogenerated_1.id}"

  ssh_username    = "mono-acc.admin"

}

build {

  sources = ["source.amazon-ebs.autogenerated_1"]

  provisioner "shell" {

    execute_command = "sudo -E -S sh '{{ .Path }}'"

    script          = "./setup.sh"

  }

}

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Thanks for your help and insight.

Mono