MongoDB4.28开启权限认证配置用户密码登录功能

$cd /usr/local/mongodb/bin
$cat mongodb.conf

[root@hadoop-master bin]# mongo
> use admin
> db.createUser({user:"root",pwd:"lianshi",roles:["root"]})

> show users

>use mytest
> db.createUser({user:"cg",pwd:"lianshi",roles:[{role:"readWrite",db:"mytest"}]})

> show users
>db.system.users.find()命令可以查看新创建的用户

#认证模式(true代表开启认证登录，false代表未开启认证登录)
auth=true

[root@hadoop-master bin]# ps -ef |grep mongo
[root@hadoop-master bin]# kill -9 15231
$./mongod -f mongodb.conf

[root@hadoop-master bin]# mongo
> use admin
switched to db admin
> show users
2020-06-21T20:14:59.735+0800 E  QUERY    [js] uncaught exception: Error: command usersInfo requires authentication :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
DB.prototype.getUsers@src/mongo/shell/db.js:1638:15
shellHelper.show@src/mongo/shell/utils.js:883:9
shellHelper@src/mongo/shell/utils.js:790:15
@(shellhelp2):1:1 -->授权配置并重启后，此时查看用户，会发现没有权限

> db.auth("root","lianshi")

> use mytest;
switched to db mytest
> show users
2020-06-21T21:25:41.293+0800 E  QUERY    [js] uncaught exception: Error: command usersInfo requires authentication :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
DB.prototype.getUsers@src/mongo/shell/db.js:1638:15
shellHelper.show@src/mongo/shell/utils.js:883:9
shellHelper@src/mongo/shell/utils.js:790:15
@(shellhelp2):1:1 --->报错没有权限

> db.auth("cg","lianshi");

> show dbs
mytest  0.000GB
>  db.student.insert({"id":"2","name":"yxy"})
WriteResult({ "nInserted" : 1 })

> db.createUser({user:"cg",pwd:"lianshi",roles:[{role:"readWrite",db:"mytest"}]})

db.updateUser("cg",{pwd:"123456"})

> db.auth("cg","lianshi");