Create snapshots of multiple EBS volumes using Terraform

I am trying to create snapshots of certain EBS volumes based on tags in a particular AWS region using Terraform. I have tried filtering EBS volumes based on Tags. I can get a clear output of EBS volume id when only one tag value is specified in the filter attribute but for more than one values, i get the following error:

data.aws_ebs_volume.ebs_volume: data.aws_ebs_volume.ebs_volume: Your query returned more than one result. Please try a more specific search criteria, or set most_recent attribute to true.

Below is my terraform template:

data "aws_ebs_volume" "ebs_volume" {
  filter {
    name   = "tag:Name"
    values = ["EBS1","EBS2","EBS3"]
  }
}
output "ebs_volume_id" {
  value = "${data.aws_ebs_volume.ebs_volume.id}"
}

resource "aws_ebs_snapshot" "ebs_volume" {
  volume_id = "${data.aws_ebs_volume.ebs_volume.id}"
}

Is there a clear way to create snapshots of multiple EBS volumes using any kind of looping statement in terraform?

You can use the count meta parameter to loop over lists, creating multiple resources or data sources.

In your case you could do something like this:

variable "ebs_volumes" {
  default = [
    "EBS1",
    "EBS2",
    "EBS3",
  ]
}

data "aws_ebs_volume" "ebs_volume" {
  count = "${length(var.ebs_volumes)}"

  filter {
    name   = "tag:Name"
    values = ["${var.ebs_volumes[count.index]}"]
  }
}

output "ebs_volume_ids" {
  value = ["${data.aws_ebs_volume.ebs_volume.*.id}"]
}

resource "aws_ebs_snapshot" "ebs_volume" {
  count     = "${length(var.ebs_volumes)}"
  volume_id = "${data.aws_ebs_volume.ebs_volume.*.id[count.index]}"
}