config parameters that use numbers try to re-apply config

[arif-ali]

Description

Below is what I get with terraform apply

  # juju_application.nova-cloud-controller will be updated in-place
  ~ resource "juju_application" "nova-cloud-controller" {
      ~ config            = {
          ~ "cpu-allocation-ratio"    = "2" -> "2.0"
          ~ "ram-allocation-ratio"    = "1" -> "1.0"
          ~ "worker-multiplier"       = "0" -> "0.25"
            # (8 unchanged elements hidden)
        }

I double checked, the variables that I am using are strings

Urgency

Annoying bug in our test suite

Terraform Juju Provider version

0.12.0

Terraform version

1.9.0

Juju version

3.4.3

Terraform Configuration(s)

variable worker-multiplier {
    type = string
    default = "0.25"
}

variable cpu-allocation-ratio {
    type = string
    default = "16.0"
}

variable ram-allocation-ratio {
    type = string
    default = "2.0"
}

resource "juju_application" "nova-cloud-controller" {
  name = "nova-cloud-controller"

  model = var.model-name

  charm {
    name     = "nova-cloud-controller"
    channel  = var.openstack-channel
    base     = var.default-base
  }

  units = var.num_units

  placement = "${join(",", sort([
    for res in juju_machine.ncc :
        res.machine_id
  ]))}"

  endpoint_bindings = [{
    space    = var.oam-space
  },{ 
    endpoint = "public"
    space    = var.public-space
  },{ 
    endpoint = "admin"
    space    = var.admin-space
  },{ 
    endpoint = "internal"
    space    = var.internal-space
  },{ 
    endpoint = "shared-db"
    space    = var.internal-space
  },{ 
    endpoint = "memcache"
    space    = var.internal-space
  }]  

  config = { 
      worker-multiplier = var.worker-multiplier
      openstack-origin  = var.openstack-origin
      region            = var.openstack-region
      vip               = var.vips["nova-cc"]
      network-manager   = "Neutron"
      console-access-protocol = "novnc"
      console-proxy-ip       = "local"
      use-internal-endpoints = "true"
      ram-allocation-ratio   = var.ram-allocation-ratio
      cpu-allocation-ratio   = var.cpu-allocation-ratio
      config-flags           = "scheduler_max_attempts=20"
  }
}

Reproduce / Test

terraform apply

then terraform plan or apply will try to change those 3 values

Debug/Panic Output

No response

Notes & References

No response

[hmlanigan]

Per the schema, all application config is expected to be a map where both the key and value are strings. This is expected behavior which does differ from juju cli.