» OSS

Kind: Standard (with locking via TableStore)

Stores the state as a given key in a given bucket on Stores Alibaba Cloud OSS. This backend also supports state locking and consistency checking via Alibaba Cloud Table Store, which can be enabled by setting the tablestore_table field to an existing TableStore table name.

» Example Configuration

terraform {
  backend "oss" {
    bucket = "bucket-for-terraform-state"
    prefix   = "path/mystate"
    key   = "version-1.tfstate"
    region = "cn-beijing"
    tablestore_endpoint = "https://terraform-remote.cn-hangzhou.ots.aliyuncs.com"
    tablestore_table = "statelock"
  }
}

This assumes we have a OSS Bucket created called bucket-for-terraform-state, a OTS Instance called terraform-remote and a OTS TableStore called statelock. The Terraform state will be written into the file path/mystate/version-1.tfstate. The TableStore must have a primary key of type string.

» Using the OSS remote state

To make use of the OSS remote state we can use the terraform_remote_state data source.

terraform {
  backend "oss" {
    bucket = "remote-state-dns"
    prefix = "mystate/state"
    key    = "terraform.tfstate"
    region = "cn-beijing"
  }
}

The terraform_remote_state data source will return all of the root outputs defined in the referenced remote state, an example output might look like:

data "terraform_remote_state" "network" {
    backend   = "oss"
    config    = {
        bucket = "remote-state-dns"
        key    = "terraform.tfstate"
        prefix = "mystate/state"
        region = "cn-beijing"
    }
    outputs   = {}
    workspace = "default"
}

» Configuration variables

The following configuration options or environment variables are supported:

  • access_key - (Optional) Alibaba Cloud access key. It supports environment variables ALICLOUD_ACCESS_KEY and ALICLOUD_ACCESS_KEY_ID.
  • secret_key - (Optional) Alibaba Cloud secret access key. It supports environment variables ALICLOUD_SECRET_KEY and ALICLOUD_ACCESS_KEY_SECRET.
  • security_token - (Optional) STS access token. It supports environment variable ALICLOUD_SECURITY_TOKEN.
  • region - (Optional) The region of the OSS bucket. It supports environment variables ALICLOUD_REGION and ALICLOUD_DEFAULT_REGION.
  • endpoint - (Optional) A custom endpoint for the OSS API. It supports environment variables ALICLOUD_OSS_ENDPOINT and OSS_ENDPOINT.
  • bucket - (Required) The name of the OSS bucket.
  • prefix - (Opeional) The path directory of the state file will be stored. Default to "env:".
  • key - (Optional) The name of the state file. Defaults to terraform.tfstate.
  • tablestore_endpoint / ALICLOUD_TABLESTORE_ENDPOINT - (Optional) A custom endpoint for the TableStore API.
  • tablestore_table - (Optional) A TableStore table for state locking and consistency.
  • encrypt - (Optional) Whether to enable server side encryption of the state file. If it is true, OSS will use 'AES256' encryption algorithm to encrypt state file.
  • acl - (Optional) Object ACL to be applied to the state file.
  • shared_credentials_file - (Optional, Available in 0.12.8+) This is the path to the shared credentials file. If this is not set and a profile is specified, ~/.aliyun/config.json will be used.
  • profile - (Optional, Available in 0.12.8+) This is the Alibaba Cloud profile name as set in the shared credentials file. It can also be sourced from the ALICLOUD_PROFILE environment variable.
  • assume_role - (Optional, Available in 0.12.6+) If provided with a role ARN, will attempt to assume this role using the supplied credentials.

The nested assume_role block supports the following:

  • role_arn - (Required) The ARN of the role to assume. If ARN is set to an empty string, it does not perform role switching. It supports environment variable ALICLOUD_ASSUME_ROLE_ARN. Terraform executes configuration on account with provided credentials.

  • policy - (Optional) A more restrictive policy to apply to the temporary credentials. This gives you a way to further restrict the permissions for the resulting temporary security credentials. You cannot use this policy to grant permissions which exceed those of the role that is being assumed.

  • session_name - (Optional) The session name to use when assuming the role. If omitted, 'terraform' is passed to the AssumeRole call as session name. It supports environment variable ALICLOUD_ASSUME_ROLE_SESSION_NAME.

  • session_expiration - (Optional) The time after which the established session for assuming role expires. Valid value range: [900-3600] seconds. Default to 3600 (in this case Alibaba Cloud use own default value). It supports environment variable ALICLOUD_ASSUME_ROLE_SESSION_EXPIRATION.