MongoDB數據庫用戶名和密碼的設置

首先是對MongoDB用戶和權限的設置，若是不設置用戶的話，直接使用mongo命令就能夠進入客戶端shell界面進行操做了，可是若是沒有設置用戶的話，總感受少了點什麼，因而通過半天的查找和實踐，差很少把用戶和權限弄明白了。總結以下：

若是按照如下這個指令安裝的話：

mongod --install --dbpath "C:\Program Files\mongodb\data\db" --logpath "C:\Program Files\mongodb\data\log\MongoDB.log"

以下：

c:\Program Files\mongodb\bin>mongod --install --dbpath "C:\Program Files\mongodb\data\db" --logpath "C:\Program Files\mongodb\data\log\MongoDB.log"

Fri Apr 05 13:47:43.164

Fri Apr 05 13:47:43.168 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.

Fri Apr 05 13:47:43.169

Fri Apr 05 13:47:43.169 Trying to install Windows service 'MongoDB'

Fri Apr 05 13:47:43.170 There is already a service named 'MongoDB', aborting

c:\Program Files\mongodb\bin>net start MongoDB

Mongo DB 服服務務已已經經啓啓動動成成功功。。

c:\Program Files\mongodb\bin>mongo

MongoDB shell version: 2.4.1

connecting to: test

Server has startup warnings:

Fri Apr 05 13:48:02.516 [initandlisten]

Fri Apr 05 13:48:02.516 [initandlisten] ** NOTE: This is a 32 bit MongoDB binary.

Fri Apr 05 13:48:02.516 [initandlisten] **       32 bit builds are limited to less than 2GB of data (or less with --journal).

Fri Apr 05 13:48:02.516 [initandlisten] **       Note that journaling defaults to off for 32 bit and is currently off.

Fri Apr 05 13:48:02.516 [initandlisten] **       See http://dochub.mongodb.org/core/32bit

Fri Apr 05 13:48:02.516 [initandlisten]

> show dbs

admin   (empty)

local   0.03125GB

>

能夠看到有兩個默認的數據庫admin和local

實例1：建立一個用戶名爲root，密碼爲admin的用戶，以下：

> use admin

switched to db admin

> db.addUser("root","admin")

{

        "user" : "root",

        "readOnly" : false,

        "pwd" : "bde0d84f6749c235a6b4e36d945eb666",

        "_id" : ObjectId("515e662430d89f61f6991c91")

}

> show collections

Fri Apr 05 13:50:36.685 JavaScript execution failed: error: {

        "$err" : "not authorized for query on admin.system.namespaces",

        "code" : 16550

} at src/mongo/shell/query.js:L128

>

說明：使用以上指令show collections的時候，發現報錯了。是由於沒有權限。作以下操做：

> db.auth("root","admin");

1

說明：返回1表示驗證成功了，返回0表示驗證失敗。

此時，輸入如下指令：show collections則能夠看到admin下的集合了。

> show collections

system.indexes

system.users

> db.system.users.find()

{ "_id" : ObjectId("515e662430d89f61f6991c91"), "user" : "root", "readOnly" : false, "pwd" : "bde0d84f6749c235a6b4e36d945eb666" }

>

實例2：在用戶名爲root，密碼爲admin的用戶下建立一個student數據庫，並在student數據庫中建立一個stu的集合並插入一個文檔，以下：

> use student

switched to db student

> db.stu.insert({"name":"maoyuanjun","age":25,"sex":"male"})

> db.stu.find()

{ "_id" : ObjectId("515e676630d89f61f6991c92"), "name" : "maoyuanjun", "age" : 25, "sex" : "male" }

退出服務器，從新登錄以下：

c:\Program Files\mongodb\bin>mongo

MongoDB shell version: 2.4.1

connecting to: test

> show dbs

Fri Apr 05 13:58:05.420 JavaScript execution failed: listDatabases failed:{ "ok" : 0, "errmsg" : "unauthorized" }

at src/mongo/shell/mongo.js:L46

出錯緣由：是沒有權限。則先判斷是否有權限，以下：

> use admin

switched to db admin

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

1

> show dbs

admin   0.0625GB

local   0.03125GB

student 0.0625GB

>

這時，咱們能夠看到用戶root，密碼admin的用戶下多了一個student數據庫。

實例3：在建立一個用戶

c:\Program Files\mongodb\bin>mongo

MongoDB shell version: 2.4.1

connecting to: test

> use admin

switched to db admin

直接添加用戶會報錯：

> db.addUser("test","123456")

Fri Apr 05 14:01:31.404 JavaScript execution failed: error: { "$err" : "not authorized for query on admin.system.users", "code" : 16550 } at src/mongo/shell/query.js:L128

作權限的判斷：

> db.auth("root","admin");

1

> use admin

switched to db admin

> db.addUser("test",123456)

{

        "user" : "test",

        "readOnly" : false,

        "pwd" : "c8ef9e7ab00406e84cfa807ec082f59e",

        "_id" : ObjectId("515e68e2be252e81c5dee198")

}

> show collections

system.indexes

system.users

> db.system.users.find()

{ "_id" : ObjectId("515e662430d89f61f6991c91"), "user" : "root", "readOnly" : fa

lse, "pwd" : "bde0d84f6749c235a6b4e36d945eb666" }

{ "_id" : ObjectId("515e68e2be252e81c5dee198"), "user" : "test", "readOnly" : fa

lse, "pwd" : "c8ef9e7ab00406e84cfa807ec082f59e" }

>