This lesson focuses on YAML Validate, Plan, Artifact, Approval, and Apply Stages and its role in the wider delivering Azure infrastructure with Terraform through Azure Repos, pull requests, YAML pipelines, secure service connections, remote state, artifacts, approvals, and release validation workflow.
Learners work with the actual design choices, dependencies, controls, and failure modes that distinguish this topic from a generic Terraform exercise.
Build a multi-stage YAML pipeline that applies only a reviewed plan artifact.
Add separate pull-request and main-branch behavior with production approval.
The apply stage cannot run without the approved artifact and environment permission.
Resolve artifact paths, provider caching, stale plans, YAML conditions, and approval configuration.
Learners isolate the smallest verified cause, correct it, rerun the relevant validation step, and record the preventive action in the course improvement log.