7c6e78bcb0
Until now we've not really cared much about the state snapshot produced by the previous Terraform operation, except to use it as a jumping-off point for our refresh step. However, we'd like to be able to report to an end-user whenever Terraform detects a change that occurred outside of Terraform, because that's often helpful context for understanding why a plan contains changes that don't seem to have corresponding changes in the configuration. As part of reporting that we'll need to keep track of the state as it was before we did any refreshing work, so we can then compare that against the state after refreshing. To retain enough data to achieve that, the existing Plan field State is now two fields: PrevRunState and PriorState. This also includes a very shallow change in the core package to make it populate something somewhat-reasonable into this field so that integration tests can function reasonably. However, this shallow implementation isn't really sufficient for real-world use of PrevRunState because we'll actually need to update PrevRunState as part of planning in order to incorporate the results of any provider-specific state upgrades to make the PrevRunState objects compatible with the current provider schema, or else our diffs won't be valid. This deeper awareness of PrevRunState in Terraform Core will follow in a subsequent commit, prior to anything else making use of Plan.PrevRunState. |
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| .circleci | ||
| .github | ||
| addrs | ||
| backend | ||
| builtin | ||
| command | ||
| communicator | ||
| configs | ||
| dag | ||
| docs | ||
| e2e | ||
| experiments | ||
| httpclient | ||
| instances | ||
| internal | ||
| lang | ||
| moduledeps | ||
| plans | ||
| plugin | ||
| plugin6 | ||
| providers | ||
| provisioners | ||
| registry | ||
| repl | ||
| scripts | ||
| states | ||
| terraform | ||
| tfdiags | ||
| tools | ||
| version | ||
| website | ||
| .gitignore | ||
| .go-version | ||
| .hashibot.hcl | ||
| .tfdev | ||
| BUGPROCESS.md | ||
| CHANGELOG.md | ||
| CODEOWNERS | ||
| Dockerfile | ||
| LICENSE | ||
| Makefile | ||
| README.md | ||
| checkpoint.go | ||
| codecov.yml | ||
| commands.go | ||
| go.mod | ||
| go.sum | ||
| help.go | ||
| main.go | ||
| main_test.go | ||
| plugins.go | ||
| provider_source.go | ||
| signal_unix.go | ||
| signal_windows.go | ||
| version.go | ||
README.md
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.
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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, and Terraform can automatically download providers that are published on the Terraform Registry. HashiCorp develops some providers, and others are developed by other organizations. For more information, see Extending Terraform.
To learn more about compiling Terraform and contributing suggested changes, please refer to the contributing guide.
To learn more about how we handle bug reports, please read the bug triage guide.