MongoDB: Server has startup warnings ''Access control is not enabled for the database''

I firstly installed MongoDB 3.4.1 today. But when I start it and use MongoDB shell, it gave me these warnings below:

C:\Users\hs>"C:\Program Files\MongoDB\Server\3.4\bin\mongo.exe
MongoDB shell version v3.4.1
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.1
Server has startup warnings:
2017-01-12T21:19:46.941+0800 I CONTROL  [initandlisten]
2017-01-12T21:19:46.942+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2017-01-12T21:19:46.942+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2017-01-12T21:19:46.942+0800 I CONTROL  [initandlisten]

my computer is Microsoft Windows [version 10.0.14393].

Mongodb v3.4

You need to do the following to create a secure database:

Make sure the user starting the process has permissions and that the directories exist (/data/db in this case).

1. Start MongoDB without access control.

   mongod --port 27017 --dbpath /data/db

2. Connect to the instance.

   mongo --port 27017

3. Create the user administrator (in the admin authentication database).

   use admin db.createUser( { user: "myUserAdmin", pwd: "abc123", roles: [ { role: "userAdminAnyDatabase", db: "admin" } ] } )

4. Re-start the MongoDB instance with access control.

   mongod --auth --port 27017 --dbpath /data/db

5. Connect and authenticate as the user administrator.

   mongo --port 27017 -u "myUserAdmin" -p "abc123" --authenticationDatabase "admin"

6. Create additional users as needed for your deployment (e.g. in the test authentication database).

   use test db.createUser( { user: "myTester", pwd: "xyz123", roles: [ { role: "readWrite", db: "test" }, { role: "read", db: "reporting" } ] } )

7. Connect and authenticate as myTester.

   mongo --port 27017 -u "myTester" -p "xyz123" --authenticationDatabase "test"

I basically just explained the short version of the official docs here: https://docs.mongodb.com/master/tutorial/enable-authentication/

OMG, what a gas plant, that top answer!

All you need to do is to:

1. Edit your config, e.g. C:\Program Files\MongoDB\Server\4.4\bin\mongodb.cfg
2. Turn the security: authorization: to enabled, as illustrated; note that this sub-entry may be missing completely. Just add it then.
3. Restart your MongoDB Server service from the Windows Services control panel.

Obviously, if, following this, set up a read/readWrite role-based policy, that will make much more sense.

Ref: https://docs.mongodb.com/manual/tutorial/configure-scram-client-authentication/

I've just tested this using phpunit, works as expected.

you can create an admin user or another role. run it on mongo shell.

db.createUser({user: "username", pwd: "password", roles: ["dbAdmin"]})

if you get SCRAM-SHA-256error you can set the SHA-1 mechanism.

db.createUser({user: "username", pwd: "password", roles: ["dbAdmin"], mechanisms: ["SCRAM-SHA-1"]})

You need to delete your old db folder and recreate new one. It will resolve your issue.