Terraform is a tool for building, changing, and versioning infrastructure safely and
efficiently. Terraform can manage existing and popular service providers as well as
custom in-house solutions.
The key features of Terraform are:
Infrastructure as Code: Infrastructure is described using a high-level configuration
syntax. This allows a blueprint of your datacenter to be versioned and treated as you
would any other code. Additionally, infrastructure can be shared and re-used.
Execution Plans: Terraform has a "planning" step where it generates an execution plan.
The execution plan shows what Terraform will do when you call apply. This lets you
avoid any surprises when Terraform manipulates infrastructure.
Resource Graph: Terraform builds a graph of all your resources, and parallelizes the
creation and modification of any non-dependent resources. Because of this, Terraform
builds infrastructure as efficiently as possible, and operators get insight into
dependencies in their infrastructure.
Change Automation: Complex changesets can be applied to your infrastructure with minimal
human interaction. With the previously mentioned execution plan and resource graph, you
know exactly what Terraform will change and in what order, avoiding many possible human
errors.
For more information, see the introduction section of the Terraform website.
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