119 lines
5.0 KiB
Markdown
119 lines
5.0 KiB
Markdown
---
|
|
layout: "docs"
|
|
page_title: "Command: 0.12upgrade"
|
|
sidebar_current: "docs-commands-012upgrade"
|
|
description: |-
|
|
The 0.12upgrade subcommand automatically rewrites existing configurations for Terraform 0.12 compatibility.
|
|
---
|
|
|
|
# Command: 0.12upgrade
|
|
|
|
The `terraform 0.12upgrade` command applies several automatic upgrade rules to
|
|
help prepare a module that was written for Terraform v0.11 to be used
|
|
with Terraform v0.12.
|
|
|
|
-> This command requires **Terraform v0.12 or later**.
|
|
|
|
## Usage
|
|
|
|
Usage: `terraform 0.12upgrade [options] [dir]`
|
|
|
|
By default, `0.12upgrade` changes configuration files in the current working
|
|
directory. However, you can provide an explicit path to another directory if
|
|
desired, which may be useful for automating migrations of several modules in
|
|
the same repository.
|
|
|
|
When run with no other options, the command will first explain what it is
|
|
going to do and prompt for confirmation:
|
|
|
|
```
|
|
$ terraform 0.12upgrade
|
|
|
|
This command will rewrite the configuration files in the given directory so
|
|
that they use the new syntax features from Terraform v0.12, and will identify
|
|
any constructs that may need to be adjusted for correct operation with
|
|
Terraform v0.12.
|
|
|
|
We recommend using this command in a clean version control work tree, so that
|
|
you can easily see the proposed changes as a diff against the latest commit.
|
|
If you have uncommitted changes already present, we recommend aborting this
|
|
command and dealing with them before running this command again.
|
|
|
|
Would you like to upgrade the module in the current directory?
|
|
Only 'yes' will be accepted to confirm.
|
|
|
|
Enter a value: yes
|
|
```
|
|
|
|
The `0.12upgrade` subcommand requires access to providers used in the
|
|
configuration in order to analyze their resource types, so it's important to
|
|
run `terraform init` first to install these. In some rare cases, a configuration
|
|
that worked in v0.11 may have syntax errors in v0.12, in which case
|
|
`terraform init` will run in a special mode where it installs only enough to
|
|
run the upgrade command, after which you can run `terraform init` again to
|
|
complete initialization.
|
|
|
|
Many of the rewrite rules are completely automatic, but in some cases the
|
|
tool cannot determine enough information from the configuration alone to make
|
|
a decision, and so it will instead add a comment to the configuration for
|
|
user review. All such comments contain the string `TF-UPGRADE-TODO` to make
|
|
them easy to find.
|
|
|
|
After upgrading, the configuration will also be reformatted into the standard
|
|
Terraform style and expressions rewritten to use the more-readable v0.12 syntax
|
|
features.
|
|
|
|
We recommend running this command with a clean version control work tree so
|
|
that you can use VCS tools to review the proposed changes, including any
|
|
`TF-UPGRADE-TODO` comments, and make any revisions required before committing
|
|
the change.
|
|
|
|
Once upgraded the configuration will no longer be compatible with Terraform
|
|
v0.11 and earlier. When upgrading a shared module that is called from multiple
|
|
configurations, you may need to
|
|
[fix existing configurations to a previous version](/docs/configuration/modules.html#module-versions)
|
|
to allow for a gradual upgrade. If the module is published via
|
|
[a Terraform registry](/docs/registry/), assign a new _major_ version number
|
|
to the upgraded module source to represent the fact that this is a breaking
|
|
change for v0.11 callers. If a module is installed directly from a version
|
|
control system such as Git,
|
|
[use specific revisions](https://www.terraform.io/docs/modules/sources.html#selecting-a-revision)
|
|
to control which version is used by which caller.
|
|
|
|
The command-line options are all optional. The available options are:
|
|
|
|
* `-yes` - Skip the initial introduction messages and interactive confirmation.
|
|
Use this when running the command in batch from a script.
|
|
|
|
* `-force` - Override the heuristic that attempts to detect if a configuration
|
|
is already written for v0.12 or later. Some of the transformations made by
|
|
this command are not idempotent, so re-running against the same module may
|
|
change the meanings of some expressions in the module.
|
|
|
|
## Batch Usage
|
|
|
|
After you've experimented with the `0.12upgrade` command in some confined
|
|
situations, if you have a repository containing multiple modules you may
|
|
wish to batch-upgrade them all and review them together. Recursive upgrades
|
|
are not supported by the tool itself, but if you are on a Unix-style system
|
|
you can achieve this using the `find` command as follows:
|
|
|
|
```
|
|
find . -name '*.tf' -printf "%h\n" | uniq | xargs -n1 terraform 0.12upgrade -yes
|
|
```
|
|
|
|
On Mac OS X, the `find` included with the system does not support the `-printf` argument. You can install GNU find using Homebrew in order to use that argument:
|
|
|
|
```
|
|
brew install findutils
|
|
```
|
|
Once installed, run the above command line using `gfind` instead of `find`.
|
|
|
|
|
|
Note that the above includes the `-yes` option to override the interactive
|
|
prompt, so be sure you have a clean work tree before running it.
|
|
|
|
Because upgrading requires access to the configuration's provider plugins,
|
|
all of the directories must be initialized with `terraform init` prior to
|
|
running the above.
|