instance_interruption_behaviour results in availability_zone being ignored

[realflash]

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Terraform Version

Terraform v0.12.24

• provider.aws v2.56.0

Affected Resource(s)

aws_spot_instance_request

resource "aws_spot_instance_request" "wrong_zone" {
  ami = "ami-0ed2df11a6d41ea78"
  instance_type        = "t3.nano"
  availability_zone    = "eu-west-2a"
  instance_interruption_behaviour = "stop"
}

resource "aws_spot_instance_request" "right_zone" {
  ami = "ami-0ed2df11a6d41ea78"
  instance_type        = "t3.nano"
  availability_zone    = "eu-west-2a"
}

Debug Output

https://gist.github.com/realflash/80b306253fbcc2d67e35c0c5c93d9080

Expected Behaviour

Both instance requests created in the requested zone

Actual Behaviour

Instance with instance_interruption_behaviour = "stop" created in zone 2b instead of the requested zone. State file incorrect:

$ terraform state show aws_spot_instance_request.wrong_zone
# aws_spot_instance_request.wrong_zone:
resource "aws_spot_instance_request" "wrong_zone" {
    ami                             = "ami-0ed2df11a6d41ea78"
    availability_zone               = "eu-west-2a"
    block_duration_minutes          = 0
    get_password_data               = false
    id                              = "sir-t62iw2tg"
    instance_interruption_behaviour = "stop"
    instance_type                   = "t3.nano"
    security_groups                 = []
    source_dest_check               = true
    spot_bid_status                 = "pending-fulfillment"
    spot_request_state              = "open"
    spot_type                       = "persistent"
    valid_from                      = "0001-01-01T00:00:00Z"
    valid_until                     = "0001-01-01T00:00:00Z"
    vpc_security_group_ids          = []
    wait_for_fulfillment            = false

Actual zone is 2b:

Steps to Reproduce

1. terraform apply

[justinretzolk]

Hey @realflash 👋 Thank you for taking the time to file this. Based on the linked issue, it looks like this may be resolved with #18473. Can you let us know if you're still running into this?

[github-actions]

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[github-actions]

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