无法在 Mongo 3.6.8 中添加管理员用户

Question

I'm trying to add an admin user in Mongo, but I'm having trouble.

I already have auth = true commented out inside /etc/mongodb.conf .

When I run Mongo, I run these commands in order:

mongo

use admin

db.createUser({user:"admin",pwd:"password",roles:["root"]});

When I do so, I encounter the following error:

2020-10-11T04:50:50.714+0000 E QUERY    [thread1] Error: couldn't add user: there are
 no users authenticated :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
DB.prototype.createUser@src/mongo/shell/db.js:1437:15
@(shell):1:1

I'm not sure exactly how to create an admin user if I have to log in as an admin user to do so. Any help is appreciated!

Answer 1

You don't have to disable authentication. With authentication enabled you can still logon to your MonogDB without username/password. However, as soon as you create the first user with userAdmin or userAdminAnyDatabase role the access control becomes active and you have to authenticate.

This behavior is called Localhost Exception

Is this the first user to try to create? Perhaps another admin user already exist. See also How do I create a the first mongodb user with authorization enabled?

Answer 2

在导出旧数据库作为备份后，我只是放弃并重新开始使用新数据库。

Answer 3

For creating a user you will have to have a user in admin database first. So while creating user you need to provide db name and role both. Try creating user with below syntax.

use admin
db.createUser(
  {
    user: "myUserAdmin",
    pwd: "password"
    roles: [ { role: "userAdminAnyDatabase", db: "admin" }, "readWriteAnyDatabase" ]
  }
)

Reference-https://docs.mongodb.com/manual/tutorial/enable-authentication/