How to Import Current Infrastructure AWS
Make sure the AWS profile has access to the resources you plan to import
Use Cases
- If you have existing infrastructure that was not created using Terraform, you can use terraform import to import those resources into your Terraform state file. This allows you to manage those resources with Terraform going forward.
- If you accidentally delete your Terraform state file or lose access to it, you can use terraform import to import the resources back into your Terraform state file.
Go into the directory with the main.tf
Initialize the Directory
When you create a new configuration — or check out an existing configuration from version control — you need to initialize the directory with terraform init.
Initializing a configuration directory downloads and installs the providers defined in the configuration, which in this case is the AWS provider. Terraform documentation can be found here
terraform init
Example:
$ terraform init
Initializing modules...
- bucket in github.com/Telestream/Telestream-Terraform-Store/AWS/Bucket
Initializing the backend...
Initializing provider plugins...
- Finding hashicorp/aws versions matching "4.59.0"...
- Installing hashicorp/aws v4.59.0...
- Installed hashicorp/aws v4.59.0 (signed by HashiCorp)
Terraform has created a lock file .terraform.lock.hcl to record the provider
selections it made above. Include this file in your version control repository
so that Terraform can guarantee to make the same selections by default when
you run "terraform init" in the future.
Terraform has been successfully initialized!
You may now begin working with Terraform. Try running "terraform plan" to see
any changes that are required for your infrastructure. All Terraform commands
should now work.
If you ever set or change modules or backend configuration for Terraform,
rerun this command to reinitialize your working directory. If you forget, other
commands will detect it and remind you to do so if necessary.
$
Update Terraform Module to use Existing Resource Name to be Imported
Copy the module in Examples directory that fits your requirements. Example module in examples will be the iam_role_access module
For all resources that you want to import to be controlled by terraform, update the main.tf file with their existing names instead of new unique names.
provider "aws" {
region = "<replace-with-region-to-deploy>"
profile = "<replace-with-aws-profile>"
}
module "bucket" {
source = "github.com/Telestream/Telestream-Terraform-Store/AWS/Bucket"
bucket_names = ["<replace-with-existing-bucket-name-to-be-imported>"]
iam_access = {
iam_policy_name = "<replace-with-unique-policy-name>"
iam_role_name = "<replace-with-unique-role-name>"
}
}
output "bucket_names" {
value = module.bucket.id
description = "list of the of names of the buckets created by terraform"
}
output "bucket_arns" {
value = module.bucket.arn
description = "list of the ARNs of the buckets. Will be of format [arn:aws:s3:::bucketname]."
}
output "iam_policy_arn" {
value = module.bucket.iam_policy_arn
description = "The ARN assigned by AWS to this policy."
}
output "iam_role_arn" {
value = module.bucket.iam_role_arn
description = "Amazon Resource Name (ARN) specifying the role."
}
Example:
provider "aws" {
region = "us-east-1"
profile = "dev"
}
module "bucket" {
source = "github.com/Telestream/Telestream-Terraform-Store/AWS/Bucket"
bucket_names = ["fake-bucket-name"]
iam_access = {
iam_policy_name = "tcloud_store_access_policy"
iam_role_name = "tcloud_store_access_role"
}
}
output "bucket_names" {
value = module.bucket.id
description = "list of the of names of the buckets created by terraform"
}
output "bucket_arns" {
value = module.bucket.arn
description = "list of the ARNs of the buckets. Will be of format [arn:aws:s3:::bucketname]."
}
output "iam_policy_arn" {
value = module.bucket.iam_policy_arn
description = "The ARN assigned by AWS to this policy."
}
output "iam_role_arn" {
value = module.bucket.iam_role_arn
description = "Amazon Resource Name (ARN) specifying the role."
}
Terraform Import
Terraform can import existing infrastructure resources. This functionality lets you bring existing resources under Terraform management. Terraform documentation can be found here This is done by using the command terraform import
How to Import Bucket
- S3 bucket can be imported using the existing bucket name
terraform import module.bucket.aws_s3_bucket.bucket[0] <bucket-name>
Example
$ terraform import module.bucket.aws_s3_bucket.bucket[0] fake-bucket-name
module.bucket.aws_s3_bucket.bucket[0]: Importing from ID "fake-bucket-name"...
module.bucket.data.aws_iam_policy_document.policy[0]: Reading...
module.bucket.aws_s3_bucket.bucket[0]: Import prepared!
Prepared aws_s3_bucket for import
module.bucket.aws_s3_bucket.bucket[0]: Refreshing state... [id=fake-bucket-name]
module.bucket.data.aws_iam_policy_document.policy[0]: Read complete after 0s [id=2635403514]
Import successful!
The resources that were imported are shown above. These resources are now in
your Terraform state and will henceforth be managed by Terraform.
$
How to Import Role
- IAM Roles can be imported using the existing role name
terraform import module.bucket.aws_iam_role.role[0] <role-name>
Example
$ terraform import module.bucket.aws_iam_role.role[0] tcloud_store_access_role
module.bucket.data.aws_iam_policy_document.assume_role[0]: Reading...
module.bucket.data.aws_iam_policy_document.policy[0]: Reading...
module.bucket.data.aws_iam_policy_document.policy[0]: Read complete after 0s [id=2847671425]
module.bucket.data.aws_iam_policy_document.assume_role[0]: Read complete after 0s [id=3298468559]
module.bucket.data.aws_iam_policy_document.assume_role_combined[0]: Reading...
module.bucket.data.aws_iam_policy_document.assume_role_combined[0]: Read complete after 0s [id=1029124481]
module.bucket.aws_iam_role.role[0]: Importing from ID "tcloud_store_access_role"...
module.bucket.aws_iam_role.role[0]: Import prepared!
Prepared aws_iam_role for import
module.bucket.aws_iam_role.role[0]: Refreshing state... [id=tcloud_store_access_role]
Import successful!
The resources that were imported are shown above. These resources are now in
your Terraform state and will henceforth be managed by Terraform.
$
How to Import Policy
- IAM Policies can be imported using the existing policy ARN
terraform import module.bucket.aws_iam_policy.policy[0] <policy-arn>
Example
$ terraform import module.bucket.aws_iam_policy.policy[0] arn:aws:iam::012345678901:policy/tcloud_store_access_policy
module.bucket.data.aws_iam_policy_document.assume_role[0]: Reading...
module.bucket.data.aws_iam_policy_document.policy[0]: Reading...
module.bucket.data.aws_iam_policy_document.policy[0]: Read complete after 0s [id=2847671425]
module.bucket.data.aws_iam_policy_document.assume_role[0]: Read complete after 0s [id=3298468559]
module.bucket.aws_iam_policy.policy[0]: Importing from ID "arn:aws:iam::012345678901:policy/tcloud_store_access_policy"...
module.bucket.aws_iam_policy.policy[0]: Import prepared!
Prepared aws_iam_policy for import
module.bucket.aws_iam_policy.policy[0]: Refreshing state... [id=arn:aws:iam::012345678901:policy/tcloud_store_access_policy]
module.bucket.data.aws_iam_policy_document.assume_role_combined[0]: Reading...
module.bucket.data.aws_iam_policy_document.assume_role_combined[0]: Read complete after 0s [id=1029124481]
Import successful!
The resources that were imported are shown above. These resources are now in
your Terraform state and will henceforth be managed by Terraform.
$
How to Import User
- IAM Users can be imported using the existing user name
NOTE access keys can not be imported into terraform so new keys will be generated after running terraform apply after importing, but will not delete the existing keys
terraform import module.bucket.aws_iam_user.user[0] <user-name>
Example
$ terraform import module.bucket.aws_iam_user.user[0] tcloud_store_access_user
module.bucket.aws_iam_user.user[0]: Importing from ID "tcloud_store_access_user"...
module.bucket.aws_iam_user.user[0]: Import prepared!
Prepared aws_iam_user for import
module.bucket.aws_iam_user.user[0]: Refreshing state... [id=tcloud_store_access_user]
module.bucket.data.aws_iam_policy_document.policy[0]: Reading...
module.bucket.data.aws_iam_policy_document.policy[0]: Read complete after 0s [id=2847671425]
Import successful!
The resources that were imported are shown above. These resources are now in
your Terraform state and will henceforth be managed by Terraform.
$
Terraform Apply
The terraform apply command performs a plan just like terraform plan does, but then actually carries out the planned changes to each resource using the relevant infrastructure provider's API. It asks for confirmation from the user before making any changes. After approval it will create infrastructure. Terraform documentation can be found here
terraform apply
Updated over 1 year ago