Atmos External Stores

Stores are external key-value backends configured in atmos.yaml that enable components to share data outside of Terraform state. Atmos supports five store providers: AWS SSM Parameter Store, Azure Key Vault, Google Secret Manager, Redis, and JFrog Artifactory.

When to Use Stores

Use stores when you need to:

• Share data between components that is not managed by Terraform
• Access configuration from external systems (SSM, Azure Key Vault, Redis)
• Integrate with CI/CD pipelines that write to parameter stores
• Store and retrieve Terraform outputs via hooks for faster cross-component reads
• Share state across accounts, regions, or cloud providers

For Terraform-managed outputs, prefer !terraform.state (fastest) or !terraform.output. Use stores for external data or when you need a write-back mechanism via hooks.

Configuring Stores in atmos.yaml

All stores are declared under the top-level stores: key in atmos.yaml. Each store has a unique name, a type, and provider-specific options: