mukta-puri / go-tfdr Goto Github PK

Go cli to copy terraform state file from one terraform cloud workspace to another or to delete terraform state of specified resources from a workspace. This cli can be used in a disaster recovery scenario where new infrastructure needs to be set up for select resources in a template. For example, if some infrastructure is set up in AWS using a terraform template and a region failure occurs, this cli can be used while setting up new infrastructure in a new region.

tfdr [command]

• tfdr cli docs

Here is an exmple of how this cli could be used in a disaster recovery scenario. The following steps assumes there is already a terraform cloud workspace (test1) with a terraform template for setting up infrastructure

1. Create a new terraform workspace (test2) for the disaster recovery infrastructure
2. Create a json file (filters.json) with the list of resources whose state we need to copy over from one workspace to another
3. Run the following command to copy state from the original workspace to the new workspace

   tfdr state copy -f filters.json -o test1 -n test2
   

4. Plan and apply the new workspace
5. Run the following command to delete state of the copied over resources from the original workspace

   tfdr state delete -f filters.json -w test1
   

• global_resource_types contains any resource types you would like to be moved to the new workspace regardless of resource or module name. In the example below, this list was populated with global AWS resources. While copying infrastructure from one AWS region to another, global AWS resources that do not have any region should not be re-created. This property allows us to copy the state of those global AWS resources when setting up a disaster recovery infrastructure.
• filters contains a list of specific resources in the terrafrom template to copy state of.
  • filter_properties contains information about the resource whose state we want to copy.
  • new_properties can contain any properties in the state we would like to replace for that resource. Currently the cli allows updating the name of the copied over resource or any instance attributes in the state of the copied over resource.

{
    "global_resource_types": [
        "aws_cloudfront_distribution",
        "aws_cloudfront_origin_access_identity",
        "aws_iam_access_key",
        "aws_iam_policy_document",
        "aws_iam_policy",
        "aws_iam_role_policy_attachment",
        "aws_iam_role_policy",
        "aws_iam_role",
        "aws_iam_user_policy",
        "aws_iam_user",
        "aws_route53_record"
    ],
    "filters": [
        {
            "filter_properties": {
                "module": "module.test_module_1",
                "type": "type_1",
                "name": "orig_name_1"
            },
            "new_properties": {
                "name": "new_name_1",
                "attributes": {
                    "attr1": "new_value_1",
                    "attr2": ""
                }
            }
        },
        {
            "filter_properties": {
                "module": "module.test_module_2",
                "type": "type_2",
                "name": "orig_name_2"
            },
            "new_properties": {
                "name": "new_name_2"
            }
        },
        {
            "filter_properties": {
                "module": "module.test_module_3",
                "type": "type_3",
                "name": "orig_name_3"
            },
            "new_properties": {
                "name": "new_name_3",
                "attributes": {
                    "attr1": "new_value_3",
                    "attr2": "new_value_3b"
                }
            }
        }
    ]
}