DockerCLI/docs/reference/commandline/secret_create.md

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secret create The secret create command description and usage
secret, create

secret create

Usage:  docker secret create [NAME]

Create a secret using stdin as content
Options:
      --help         Print usage
  -l, --label list   Secret labels (default [])

Creates a secret using standard input for the secret content. You must run this command on a manager node.

Examples

Create a secret

$ cat secret.json | docker secret create secret.json
mhv17xfe3gh6xc4rij5orpfds

$ docker secret ls
ID                          NAME                    CREATED                                   UPDATED                                   SIZE
mhv17xfe3gh6xc4rij5orpfds   secret.json             2016-10-27 23:25:43.909181089 +0000 UTC   2016-10-27 23:25:43.909181089 +0000 UTC   1679

Create a secret with labels

$ cat secret.json | docker secret create secret.json --label env=dev --label rev=20161102
jtn7g6aukl5ky7nr9gvwafoxh

$ docker secret inspect secret.json
[
    {
        "ID": "jtn7g6aukl5ky7nr9gvwafoxh",
        "Version": {
            "Index": 541
        },
        "CreatedAt": "2016-11-03T20:54:12.924766548Z",
        "UpdatedAt": "2016-11-03T20:54:12.924766548Z",
        "Spec": {
            "Name": "secret.json",
            "Labels": {
                "env": "dev",
                "rev": "20161102"
            },
            "Data": null
        },
        "Digest": "sha256:4212a44b14e94154359569333d3fc6a80f6b9959dfdaff26412f4b2796b1f387",
        "SecretSize": 1679
    }
]