[Feature Request]: Add GitHub's SSH key fingerprints

[rswrz]

Feature Description

At one customer site, we install Terraform modules from private Git repositories using SSH. This requires the Git server’s SSH fingerprints to be present in the known_hosts file. Without this, Terraform fails to install the module via SSH, displaying the following error message:

╷
│ Error: Failed to download module
│ 
│   on main.tf line 1337:
│   1337: module "example" {
│ 
│ Could not download module "example" (main.tf:1337) source code
│ from "git::ssh://[email protected]/cloudeteer/private-repository.git?ref=v1.1.1":
│ error downloading
│ 'ssh://[email protected]/cloudeteer/private-repository.git?ref=v1.1.1': /usr/bin/git
│ exited with 128: Cloning into '.terraform/modules/example'...
│ Host key verification failed.
│ fatal: Could not read from remote repository.
│ 
│ Please make sure you have the correct access rights
│ and the repository exists.
│ 
╵

Use Case

Enable the installation of Terraform modules via SSH during the terraform init execution, without the need to manually add SSH server fingerprints as a GitHub Actions step.

Additional Information

• GitHub's SSH key fingerprints

On the customer’s custom Launchpad installation, this is currently achieved by the following command in the install script.

# Add GitHub SSH host keys to known hosts
sudo -u "$RUNNER_USER" -- ssh-keyscan -t rsa github.com | sudo -u "$RUNNER_USER" -- tee -a "/home/$RUNNER_USER/.ssh/known_hosts"

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