What method can you use to trigger a run in a Terraform Cloud workspace that is connected to a Version Control System (VCS) repository?

Triggering a run in a Terraform Cloud workspace that is linked to a Version Control System (VCS) repository can efficiently be accomplished by committing a change to that repository. When you make a commit, it sends a notification to Terraform Cloud that a change has occurred, which then initiates a new plan and apply cycle in the connected workspace. This integration allows for seamless automation and ensures that infrastructure changes are managed and tracked directly through version control practices.

In scenarios where the workspace is set to automatically trigger runs based on VCS changes, any new commit, whether it be a minor update to a file or a significant modification, will result in a new run being queued in Terraform Cloud. This method supports collaboration and version history, as every change is linked to commits made in the repository.

Other methods listed, such as running a command via the CLI or manually triggering from the Terraform UI, can also initiate runs but do not leverage the automatic triggers that VCS configurations provide. Pulling the latest changes from the repository does not inherently trigger a run; instead, it merely updates the local copy of the repository without notifying Terraform Cloud of changes needing to be processed. Thus, committing changes is the most effective method in the context of VCS integration with Terraform Cloud.