Issue with resources containing Read-only (Computed) attributes when migrating to the new Terraform ACI provider which uses plugin framework (DCNE-266)

[shrsr]

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Terraform Version

APIC version and APIC Platform

• all

Affected Resource(s)

All the resources consisting of read only (Computed) attributes.

Terraform Configuration Files

resource "aci_application_epg" "inherit_epg" {
  application_profile_dn = aci_application_profile.app_profile_for_epg.id
  name                   = "inherit_epg"
  description            = "epg to create relation sec_inherited"
  relation_fv_rs_node_att {
    node_dn              = "topology/pod-1/node-108"
    encap                = "vlan-100"
    description          = "this is desc for static leaf"
    deployment_immediacy = "lazy"
    mode                 = "regular"
  }
}

Debug Output

Panic Output

Expected Behavior

There should no change.

Actual Behavior

 aci_application_epg.inherit_epg will be updated in-place
  ~ resource "aci_application_epg" "inherit_epg" {
        id                                            = "uni/tn-test_tenant/ap-test_ap/epg-inherit_epg"
        name                                          = "inherit_epg"
      ~ pc_tag                                        = "16395" -> (known after apply)
        tags                                          = []
        # (53 unchanged attributes hidden)
    }

Steps to Reproduce

Use an older release of TF ACI ("2.15.0")

1. terraform init
2. terraform apply

Upgrade to the new provider

1. terraform plan

Important Factoids

This issue is currently seen with configurations consisting of older attributes of type block.
Example ->

  relation_fv_rs_node_att {
    node_dn              = "topology/pod-1/node-108"
    encap                = "vlan-100"
    description          = "this is desc for static leaf"
    deployment_immediacy = "lazy"
    mode                 = "regular"
  }

Proposed fix: This issue is not seen if we populate the old type Block attributes with API returned values

References

• #0000