terraform-provider-libvirt: Connection to libvirt via SSH fails with provider version 0.6.9

System Information

Linux distribution

Fedora 34

Terraform version

Terraform v1.0.1
on linux_amd64

Provider and libvirt versions

provider: v0.6.9
libvirt (remote, debian stable): 5.0.0-4+deb10u1

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Checklist

• Is your issue/contribution related with enabling some setting/option exposed by libvirt that the plugin does not yet support, or requires changing/extending the provider terraform schema?

  • Make sure you explain why this option is important to you, why it should be important to everyone. Describe your use-case with detail and provide examples where possible.
  • If it is a very special case, consider using the XSLT support in the provider to tweak the definition instead of opening an issue
  • Maintainers do not have expertise in every libvirt setting, so please, describe the feature and how it is used. Link to the appropriate documentation

• Is it a bug or something that does not work as expected? Please make sure you fill the version information below:

Description of Issue/Question

Connecting to a remote libvirt provider via SSH fails after updating to v0.6.9 with the error message Error: failed to dial libvirt: failed to read ssh key: open /home/soeren/.ssh/id_rsa: no such file or directory. I’m indeed not using RSA keypairs anymore, instead I’ve been using ed25519 keypairs. Reverting back to v0.6.3 of the provider makes it work again. For the given remote host there’s no additional settings in the local ~/.ssh/config file.

Setup

terraform {
  required_version = ">= 0.15"
  required_providers {
    libvirt = {
      source  = "dmacvicar/libvirt"
      version = "0.6.9"
    }
  }
}

provider "libvirt" {
  uri = "qemu+ssh://soeren@remotehost.tld/system"
}

resource "libvirt_domain" "terraform_test" {
  name = "terraform_test"
}

Steps to Reproduce Issue

➜ terraform plan -no-color

Error: failed to dial libvirt: failed to read ssh key: open /home/soeren/.ssh/id_rsa: no such file or directory

  with provider["registry.terraform.io/dmacvicar/libvirt"],
  on providers.tf line 12, in provider "libvirt":
  12: provider "libvirt" {

…after changing the provider version to 0.6.3 again

➜ terraform init -upgrade

Initializing the backend...

Initializing provider plugins...
- Finding dmacvicar/libvirt versions matching "~> 0.6.3"...
- Using previously-installed dmacvicar/libvirt v0.6.3

Terraform has been successfully initialized!

You may now begin working with Terraform. Try running "terraform plan" to see
any changes that are required for your infrastructure. All Terraform commands
should now work.

If you ever set or change modules or backend configuration for Terraform,
rerun this command to reinitialize your working directory. If you forget, other
commands will detect it and remind you to do so if necessary.
➜ terraform plan

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following
symbols:
  + create

Terraform will perform the following actions:

  # libvirt_domain.terraform_test will be created
  + resource "libvirt_domain" "terraform_test" {
      + arch        = (known after apply)
      + emulator    = (known after apply)
      + fw_cfg_name = "opt/com.coreos/config"
      + id          = (known after apply)
      + machine     = (known after apply)
      + memory      = 512
      + name        = "terraform_test"
      + qemu_agent  = false
      + running     = true
      + vcpu        = 1
    }

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

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Additional information:

SELinux is enabled on the host running the terraform code, however, disabling SELinux doesn’t fix the issue.