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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.
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