Summary:

The code changes in this pull request are primarily focused on simplifying the configuration and deployment options for the Janssen application, a Kubernetes-based OpenID Connect Provider and UMA Authorization Server. The key changes include the removal of support for Google Cloud Spanner as a persistence backend, simplification of the persistence configuration options, and improvements to the management of sensitive configuration and secrets.

From an application security perspective, these changes are generally positive, as they reduce the complexity of the application and its infrastructure, which can help improve the overall security posture. The removal of Spanner support and the focus on more widely-used persistence options, such as Couchbase and SQL databases, can help reduce the attack surface and make the application easier to secure.

Additionally, the improvements to secret management, including the use of Google Secret Manager, AWS Secrets Manager, and Hashicorp Vault, are a step in the right direction, as they provide secure and centralized solutions for storing and managing sensitive configuration data. However, it's important to ensure that the appropriate access controls and permissions are in place to restrict access to these secrets.

Overall, the changes in this pull request appear to be focused on improving the maintainability and security of the Janssen application, while reducing complexity and attack surface. As an application security engineer, I would recommend thoroughly reviewing the final configuration, testing the security of the application, and ensuring that all best practices are followed to mitigate potential security risks.

Files Changed:

1. charts/janssen-all-in-one/templates/secret.yaml: The changes simplify the logic for including sensitive Google credentials in the Kubernetes Secret, which can help improve the maintainability and readability of the code.
2. charts/janssen-all-in-one/values.yaml: The changes remove the dependency on Google Spanner and focus on SQL-based persistence backends, which can have a positive impact on the application's security posture.
3. charts/janssen-all-in-one/README.md: The changes reflect the removal of Spanner support and the simplification of the persistence configuration options, which can help improve the security and maintainability of the application.
4. charts/janssen-all-in-one/templates/configmap.yaml: The changes remove the environment variables related to Google Spanner and focus on the use of various secret management solutions, such as Google Secret Manager, AWS Secrets Manager, and Hashicorp Vault.
5. charts/janssen/charts/config/README.md: The changes remove support for Google Spanner as a persistence backend and simplify the configuration options, which can help improve the security and maintainability of the application.
6. charts/janssen/README.md: The changes reflect the removal of Spanner support and the simplification of the persistence configuration options, which can have a positive impact on the application's security.
7. charts/janssen/charts/config/templates/configmaps.yaml: The changes remove the environment variables related to Google Spanner and focus on the use of various secret management solutions, which can help improve the security of the application.
8. charts/janssen/charts/config/templates/secrets.yaml: The changes simplify the logic for including sensitive Google credentials in the Kubernetes Secret, which can help improve the maintainability and readability of the code.
9. charts/janssen/values.schema.json: The changes reflect the removal of Spanner support and the simplification of the persistence configuration options, which can help improve the security and maintainability of the application.
10. charts/janssen/charts/config/values.yaml: The changes include options for using secure secret management solutions, such as Google Secret Manager, AWS Secrets Manager, and Hashicorp Vault, which can help improve the security of the application.
11. charts/janssen/values.yaml: The changes remove the environment variables related to Google Spanner and simplify the persistence configuration options, which can have a positive impact on the application's security.