Docker 1.13 includes in Swarm the new concept of secrets management.

As we know, we need Swarm mode to use secrets. When we initialize a Swarm, Swarm generates some secrets for us:

$ docker swarm init

Docker 1.13 adds the secrets management with a new command, secret, with the purpose to handle them efficiently. Secret subcommands are created, ls, to inspect and rm.

Let's create our first secret. The secret create sub-command takes a secret from the standard input. So, we need to type in our secret, and then press Ctrl+D to save the content. Be careful to not hit the Enter key. We need only 1234 not 1234\n as our password, for example:

$ docker secret create password
1234

Then press Ctrl+D twice to close the standard input.

We can check if there is a secret called password:

$ docker secret ls

ID                      NAME                CREATED             UPDATED
16blafexuvrv2hgznrjitj93s  password  25 seconds ago      25 seconds ago

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