ebs_block_device - # forces replacement

[AGirin]

Description

This hit me many times at this point.

Code:

      ebs_block_device = [
        {
          device_name = "/dev/sdl"
          volume_type = "gp3"
          volume_size = local.disk_size
          tags        = local.tags
        }
      ]

Instance builds OK with no issues. EBS device is attached and of correct size. Without doing anything I re-run terraform plan and get this (like 100% of the times):

    - ebs_block_device { # forces replacement
          - delete_on_termination = true -> null
          - device_name           = "/dev/sdl" -> null
          - encrypted             = true -> null
          - iops                  = 3000 -> null
          - kms_key_id            = "arn:aws:kms:xxxx:xxxxxkey/" -> null
          - snapshot_id           = "snap-xxxxxx" -> null
          - tags                  = {
              - "Application" = "xxxxxx"
              - "Environment" = "xxxxxx"
              - "Name"        = "xxxxx"
              - "cost-center" = "xxxxx"
              - "retention"   = "xxxxxx"
              - "terraform"   = "xxxxxx"
              - "vpc"         = "xxxxx"
            } -> null
          - throughput            = 125 -> null
          - volume_id             = "vol-xxxxx" -> null
          - volume_size           = xxx -> null
          - volume_type           = "gp3" -> null
        }

I use latest module and terraform versions... The above happens on Linux or Windows servers... And I have no idea why module is trying to replace the drive...

I am force to comment out this section after instance is created and create/import aws_ebs_volume and aws_volume_attachment resources to stop instance replacement on every terraform plan/apply...

Versions

Module: 5.6.0

Terraform v1.7.0
on linux_amd64

• provider registry.terraform.io/hashicorp/aws v5.32.1
• provider registry.terraform.io/hashicorp/tls v4.0.5

Expected Behavior:

terraform plan shows no changes as nothing have changed..

[AGirin]

Answered my own question. Need to add snapshot_id an the issue goes away.

ebs_block_device = [
        {
          device_name = "/dev/sdl"
          volume_type = "gp3"
          volume_size = local.disk_size
          snapshot_id = "snap-yyyyyyyyyyy" <-----
          tags        = local.tags
        }
      ]

[github-actions]

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 have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.

[antonbabenko]

This issue has been resolved in version 6.0.0 🎉