Source of configuration files
DevOps & Tooling / Knowledge library
SOPS
structured secrets encryption with managed keys or age
Why learn SOPS?
Useful for storing encrypted configuration alongside code. Encryption does not remove the need to protect decryption keys and limit plaintext exposure.
Where it came from
SOPS encrypts supported configuration and data files while retaining an editable structured workflow. It supports multiple key-management mechanisms, including age.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Encrypt a sample file containing dummy values.
- Inspect which metadata remains readable.
- Edit and decrypt using an authorized test key.
- Test failure with an unauthorized key.
- Document recipient rotation and plaintext cleanup procedures.
Documentation and sources
- Official project documentation (getsops.io)
Catalog research notes
- Research snapshot: September 9, 2026. This entry summarizes the linked primary documentation; it does not assert a latest release version.
Connect the ideas
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Real World Example
Secure Configuration Lifecycle for Global Logistics
A global logistics firm managing distributed microservices across multiple cloud regions and on-premises data centers.
The business problem
The firm struggles with sensitive environment variables and API keys being committed to version control in plain text, leading to unauthorized access risks and complex rotation procedures when developers move between teams.
How this topic solves it
SOPS allows the firm to encrypt sensitive values within YAML configuration files while maintaining the file structure for visibility. By using cloud-native KMS providers, the firm ties decryption access to specific IAM roles, ensuring that only authorized services can read production secrets, while developers retain local access via Age keys for testing.
- Define a .sops.yaml configuration file to specify the encryption provider, such as AWS KMS or Age, for each environment.
- Encrypt existing configuration files using the sops --encrypt command, which targets specific keys within the YAML structure.
- Commit the encrypted files to the version control system, allowing team members to review changes in structure without exposing sensitive values.
- Configure CI/CD pipelines to authenticate with the KMS provider to decrypt secrets dynamically during deployment.
This diagram illustrates how configuration data flows from a developer or CI system through the SOPS encryption process using identity-based keys.
Encryption/Decryption engine
Identity-based encryption provider
Encrypted configuration storage
- Developer/CI → provides plain text → SOPS Tool
- KMS/Age Key → encrypts session key → SOPS Tool
- SOPS Tool → commits encrypted file → Git Repo
- Git Repo → requests decryption → SOPS Tool
- SOPS Tool → returns plain text → Developer/CI
Expected business outcome
The organization achieves a secure, auditable workflow where secrets are encrypted at rest in version control, and access is strictly governed by existing cloud identity policies rather than shared static credentials.
Limitations and checks
A significant trade-off is the dependency on the availability of the KMS provider or the secure distribution of Age private keys. If the KMS is unreachable or the private key is lost, the configuration becomes permanently inaccessible. To check for this, administrators should periodically verify the ability to decrypt files in a staging environment using the current identity context.