When configuring providers, it is normally valid to refer to any value which is known at apply time. This can include resource instance attributes, variables, locals, and so on. The import command has a simpler graph evaluation, which means that many of these values are unknown. We previously prevented this from happening by restricting provider configuration references to input variables (#22862), but this was more restrictive than is necessary. This commit changes how we verify provider configuration for import. We no longer inspect the configuration references during graph building, because this is too early to determine if these values will become known or not. Instead, when the provider is configured during evaluation, we check if the configuration value is wholly known. If not, we fail with a diagnostic error. Includes a test case which verifies that providers can now be configured using locals as well as vars, and an updated test case which verifies that providers cannot be configured with references to resources. |
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builtin | ||
command | ||
communicator | ||
config | ||
configs | ||
contrib | ||
dag | ||
digraph | ||
docs | ||
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examples | ||
experiments | ||
flatmap | ||
helper | ||
httpclient | ||
instances | ||
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lang | ||
moduledeps | ||
plans | ||
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providers | ||
provisioners | ||
registry | ||
repl | ||
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state | ||
states | ||
terraform | ||
tfdiags | ||
tools | ||
vendor | ||
version | ||
website | ||
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CHANGELOG.md | ||
checkpoint.go | ||
codecov.yml | ||
CODEOWNERS | ||
commands.go | ||
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help.go | ||
LICENSE | ||
main_test.go | ||
main.go | ||
Makefile | ||
panic.go | ||
plugins.go | ||
provider_source.go | ||
README.md | ||
signal_unix.go | ||
signal_windows.go | ||
synchronized_writers.go | ||
version.go |
Terraform
- Website: https://www.terraform.io
- Forums: HashiCorp Discuss
- Documentation: https://www.terraform.io/docs/
- Tutorials: HashiCorp's Learn Platform
- Certification Exam: HashiCorp Certified: Terraform Associate
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.
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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.
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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.
Getting Started & Documentation
Documentation is available on the Terraform website:
If you're new to Terraform and want to get started creating infrastructure, please check out our Getting Started guides on HashiCorp's learning platform. There are also additional guides to continue your learning.
Show off your Terraform knowledge by passing a certification exam. Visit the certification page for information about exams and find study materials on HashiCorp's learning platform.
Developing Terraform
This repository contains only Terraform core, which includes the command line interface and the main graph engine. Providers are implemented as plugins that each have their own repository in the terraform-providers
organization on GitHub. Instructions for developing each provider are in the associated README file. For more information, see the provider development overview.
To learn more about compiling Terraform and contributing suggested changes, please refer to the contributing guide.