I'm working with the Secret CSI Driver and the AWS Provider plugin to access secrets directly from AWS Secrets Manager. Currently, I haven't synced any of the secrets to Kubernetes secrets. I've created a SecretProviderClass resource for my application that specifies how to retrieve the secrets, but I'm unsure about how to reference these secrets as environment variables in my application pods. I have the secrets mounted as files, but I need to know how to properly inject them into my app as environment variables. Do I need to configure it a specific way, considering that I'm not syncing the secrets to Kubernetes secrets?
2 Answers
You can use the `env` field in your pod spec to set environment variables from the mounted file path. Just make sure to specify the path to the file where your secrets are mounted. For example:
env:
- name: DB_USERNAME
value: /mnt/secrets-store/dbusername
- name: DB_PASSWORD
value: /mnt/secrets-store/dbpassword
That way, the application will read the secrets directly from those files at runtime.
Be cautious when using environment variables for secrets as they can be exposed through logs or debugging output. Instead, consider fetching the secrets directly inside your code.
One idea is to implement a microservice that caches AWS Secrets in encrypted memory and your application can call this service to fetch secrets securely. This way, you minimize the risk of secrets being exposed on the file system or in environment variables.
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