open-nomad/website/source/docs/auth/userpass.html.md

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docs	Auth Backend: Username & Password	docs-auth-userpass	The "userpass" auth backend allows users to authenticate with Vault using a username and password.

Auth Backend: Username & Password

Name: userpass

The "userpass" auth backend allows users to authenticate with Vault using a username and password combination.

The username/password combinations are configured directly to the auth backend using the users/ path. This backend cannot read usernames and passwords from an external source.

Authentication

Via the CLI

$ vault auth -method=userpass \
  username=foo \
  password=bar

Via the API

The endpoint for the login is auth/userpass/login/<username>.

The password should be sent in the POST body encoded as JSON.

$ curl $VAULT_ADDR/v1/auth/userpass/login/mitchellh \
    -d '{ "password": "foo" }'

The response will be in JSON. For example:

{
  "lease_id":"",
  "renewable":false,
  "lease_duration":0,
  "data":null,
  "auth":{
    "client_token":"c4f280f6-fdb2-18eb-89d3-589e2e834cdb",
    "policies":[
      "root"
    ],
    "metadata":{
      "username":"mitchellh"
    },
    "lease_duration":0,
    "renewable":false
  }
}

Configuration

First, you must enable the username/password auth backend:

$ vault auth-enable userpass
Successfully enabled 'userpass' at 'userpass'!

Now when you run vault auth -methods, the username/password backend is available:

Path       Type      Description
token/     token     token based credentials
userpass/  userpass

To use the "userpass" auth backend, an operator must configure it with users that are allowed to authenticate. An example is shown below. Use vault path-help for more details.

$ vault write auth/userpass/users/mitchellh password=foo policies=root
...

The above creates a new user "mitchellh" with the password "foo" that will be associated with the "root" policy. This is the only configuration necessary.