aws_ecr_lifecycle_policy creation does not allow variable assignment to countNumber parameter

[proj4spes]

aws_ecr_lifecycle_policy does not allow variable assignment to countNumber parameter.

here it is the code

variable "number" {
description = "a number"
default = 10
}
resource "aws_ecr_repository" "foo" {
name = "bar"
}

resource "aws_ecr_lifecycle_policy" "foopolicy" {
repository = "${aws_ecr_repository.foo.name}"

policy = <<EOF
{
"rules": [
{
"rulePriority": 1,
"description": "Expire images older than 14 days",
"selection": {
"tagStatus": "untagged",
"countType": "sinceImagePushed",
"countUnit": "days",
"countNumber": "${var.number}"
},
"action": {
"type": "expire"
}
}
]
}
EOF
}
THIS is THE RESULT
1 error(s) occurred:

• aws_ecr_lifecycle_policy.foopolicy: 1 error(s) occurred:

• aws_ecr_lifecycle_policy.foopolicy: InvalidParameterException: Invalid parameter at 'LifecyclePolicyText' failed to satisfy constraint: 'Lifecycle policy valiation failure: instance type (string) does not match any allowed primitive type (allowed: ["integer"])
  '
  status code: 400, request id: 5042a1bc-fa93-11e7-b3cc-c9977d1470fa

and here there is the trace showing that CountNumber is treated as a string

policy: "" => "{\n "rules": [\n {\n "rulePriority": 1,\n "description": "Expire images older than 14 days",\n "selection": {\n "tagStatus": "untagged",\n "countType": "sinceImagePushed",\n "countUnit": "days",\n "countNumber": "10"\n },\n "action": {\n "type": "expire"\n }\n }\n ]\n}\n"
registry_id: "" => ""
repository: "" => "bar"

[bflad]

Hi @proj4spes! Does it work if you modify your policy to be (note removal of quotes):

"countNumber": ${var.number}

[proj4spes]

Thanks , anyway I believed that "$t..." were the only way to interpolate and the string to int would be automatically done ...(as in other cases ..) OK it runs as it would,,

[bflad]

The lines between the <<EOF and EOF used here is the heredoc notation inside Terraform's configuration language and automatically interpolates variables. This is similar behavior to the heredoc notation in Bash shell scripts or Ruby. Think of it like "s being around the whole lines (so anything inside interpolates) and without requiring escaping for any quotes inside (for readability).

We can likely improve the documentation here a little bit to explain this better in: https://www.terraform.io/docs/configuration/syntax.html

[bflad]

Closing as this appears to be resolved.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!