What's the benefit to use docker secret instead of mounted file

[Adamou02]

Why do you create a docker secret with a file who is inside a volume instead of just read the file of this mounted volume ?

[amir20]

There is a significant difference. When using mount, the file must exist on the host. This approach works well if you plan to deploy only one or two hosts.

However, in swarm mode, many nodes need to be managed. Copying a file to a single node is not an ideal solution. With secrets, the file is copied locally and stored in secrets, making it accessible to all nodes. This simplifies the process of updating or managing configurations for services.

[lightningspirit]

I would add that, not only that, but essentially, Docker secrets are encrypted at rest and in transit, which makes them a better (maybe the only native) fit for storing credentials.