Fixed target_resource_details of oci_bastion_session having unexpected diff after creation

[tumugin]

This PR will fix issue, target_resource_details of oci_bastion_session having unexpected diff after creation.

The fix

The polymorphic type of oci_bastion.TargetResourceDetails which was specified in type assertions was wrong so I fixed to the correct one.

Step to reproduce this issue

The following terraform resources will cause this issue.

After creating this resources, oci_bastion_session will always run into forces replacement because of the unexpected diff of target_resource_details.

resource "oci_bastion_bastion" "private_bastion" {
  bastion_type                 = "STANDARD"
  compartment_id               = var.compartment_id
  target_subnet_id             = oci_core_subnet.vcn_private_subnet.id
  client_cidr_block_allow_list = ["0.0.0.0/0"]
}

resource "oci_bastion_session" "private_mysql_session" {
  bastion_id = oci_bastion_bastion.private_bastion.id
  key_details {
    public_key_content = "<YOUR_PUBLIC_KEY_HERE>"
  }
  target_resource_details {
    session_type                               = "PORT_FORWARDING"
    target_resource_private_ip_address         = oci_mysql_mysql_db_system.mysql_db_system.ip_address
    target_resource_port                       = 3306
  }

  display_name           = "private_mysql_session"
  key_type               = "PUB"
  session_ttl_in_seconds = "10800"
}

The output of terraform plan is following.

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
-/+ destroy and then create replacement

Terraform will perform the following actions:

  # module.kino.oci_bastion_session.kino_private_mysql_session[0] must be replaced
-/+ resource "oci_bastion_session" "kino_private_mysql_session" {
      ~ bastion_name                 = "bastion20221105195433" -> (known after apply)
      + bastion_public_host_key_info = (known after apply)
      ~ bastion_user_name            = "*************" -> (known after apply)
      ~ id                           = "*************" -> (known after apply)
      + lifecycle_details            = (known after apply)
      ~ ssh_metadata                 = {
          - "command" = "ssh -i <privateKey> -N -L <localPort>:10.0.1.218:3306 -p 22 *************"
        } -> (known after apply)
      ~ state                        = "ACTIVE" -> (known after apply)
      ~ time_created                 = "2022-11-06 10:14:05.865 +0000 UTC" -> (known after apply)
      ~ time_updated                 = "2022-11-06 10:14:12.867 +0000 UTC" -> (known after apply)
        # (4 unchanged attributes hidden)

      + target_resource_details { # forces replacement
          + session_type                               = "PORT_FORWARDING" # forces replacement
          + target_resource_display_name               = (known after apply)
          + target_resource_fqdn                       = (known after apply)
          + target_resource_id                         = (known after apply)
          + target_resource_operating_system_user_name = (known after apply)
          + target_resource_port                       = 3306 # forces replacement
          + target_resource_private_ip_address         = "10.0.1.218" # forces replacement
        }

        # (1 unchanged block hidden)
    }

Plan: 1 to add, 0 to change, 1 to destroy.

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[tumugin]

Sorry, my agreements is under review.

[tumugin]

@jotruon Could you review this PR and merge it if there is no problem?

[jotruon]

sure, I forward your PR to service team to review and test

[tumugin]

@ravinitp Could you review this PR?

[nom3ad]

After trying to upgrade to v4.109.0, TF plan shows above diff even after applying all changes.

Looks like this regression was introduced in v4.96.0. I had to pin provider to "4.95.0" for now.

Hope this PR will be merged soon.

[ravinitp]

Thank you for your valuable contribution. We greatly appreciate your efforts in submitting this pull request. However, I regret to inform you that we are unable to merge it directly on GitHub at this time.

Our internal policy requires that all pull requests undergo thorough local testing and review before they can be merged into the main codebase. This process ensures the quality and stability of Terraform-Provider-OCI.

We understand that this may cause some inconvenience, but please rest assured that your contribution is highly valued. Our team will carefully review and test your changes locally to ensure they meet our standards.

We appreciate your understanding and patience in this matter. If you have any questions or need further assistance, please don't hesitate to reach out. Thank you once again for your contribution.