Terraform module to provision an S3 bucket to store terraform.tfstate file and a DynamoDB table to lock the state file
to prevent concurrent modifications and state corruption.
The module supports the following:
- Forced server-side encryption at rest for the S3 bucket
- S3 bucket versioning to allow for Terraform state recovery in the case of accidental deletions and human errors
- State locking and consistency checking via DynamoDB table to prevent concurrent operations
- DynamoDB server-side encryption
https://www.terraform.io/docs/backends/types/s3.html
NOTE: The operators of the module (IAM Users) must have permissions to create S3 buckets and DynamoDB tables when performing terraform plan and terraform apply
This project is part of our comprehensive "SweetOps" approach towards DevOps.
It's 100% Open Source and licensed under the APACHE2.
terraform {
required_version = ">= 0.11.3"
}
module "terraform_state_backend" {
source = "git::https://github.com/cloudposse/terraform-aws-tfstate-backend.git?ref=master"
namespace = "cp"
stage = "prod"
name = "terraform"
attributes = ["state"]
region = "us-east-1"
}NOTE: First create the bucket and table without any state enabled (Terraform will use the local file system to store state).
You can then import the bucket and table by using terraform import and store the state file into the bucket.
Once the bucket and table have been created, configure the backend
terraform {
required_version = ">= 0.11.3"
backend "s3" {
region = "us-east-1"
bucket = "< the name of the S3 bucket >"
key = "terraform.tfstate"
dynamodb_table = "< the name of the DynamoDB table >"
encrypt = true
}
}
module "another_module" {
source = "....."
}Initialize the backend with terraform init.
After terraform apply, terraform.tfstate file will be stored in the bucket,
and the DynamoDB table will be used to lock the state to prevent concurrent modifications.
Available targets:
help This help screen
help/all Display help for all targets
lint Lint terraform code
| Name | Description | Type | Default | Required |
|---|---|---|---|---|
| acl | The canned ACL to apply to the S3 bucket | string | private |
no |
| attributes | Additional attributes (e.g. state) |
list | <list> |
no |
| delimiter | Delimiter to be used between namespace, stage, name, and attributes |
string | - |
no |
| enable_server_side_encryption | Enable DynamoDB server-side encryption | string | true |
no |
| force_destroy | A boolean that indicates the S3 bucket can be destroyed even if it contains objects. These objects are not recoverable | string | false |
no |
| name | Name (e.g. app or cluster) |
string | terraform |
no |
| namespace | Namespace (e.g. cp or cloudposse) |
string | - | yes |
| read_capacity | DynamoDB read capacity units | string | 5 |
no |
| region | AWS Region the S3 bucket should reside in | string | - | yes |
| stage | Stage (e.g. prod, dev, staging) |
string | - | yes |
| tags | Additional tags (e.g. map(BusinessUnit,XYZ) |
map | <map> |
no |
| write_capacity | DynamoDB write capacity units | string | 5 |
no |
| Name | Description |
|---|---|
| dynamodb_table_arn | DynamoDB table ARN |
| dynamodb_table_id | DynamoDB table ID |
| dynamodb_table_name | DynamoDB table name |
| s3_bucket_arn | S3 bucket ARN |
| s3_bucket_domain_name | S3 bucket domain name |
| s3_bucket_id | S3 bucket ID |
Check out these related projects.
- terraform-aws-dynamodb - Terraform module that implements AWS DynamoDB with support for AutoScaling
- terraform-aws-dynamodb-autoscaler - Terraform module to provision DynamoDB autoscaler
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Copyright © 2017-2018 Cloud Posse, LLC
See LICENSE for full details.
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
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