Basics

terraform is an open source and cloud agnostic tool declarative files written in hcl

terraform cloud

saas remote state storage vc integration workflows collaboration on changes

lifecycle

1. write terraform code
2. init (get dependencies)
3. plan (dry run)
4. validate
5. apply

change management

procedure that will be followed when resources are modified (change) change automation is creating a constient way of managing changings terraform uses Execution Plans and Resources graphs

plans

• manual review of changes that needs to be approved
• can be visualized using the terraform graph command and piping to GraphViz
• terraform graph | dot -Tsvg > graph.svg
• this graph shows the dependencies between resources and determines order of deployment, what to refresh, etc.