mongodb创建普通角色和普通用户

假设业务的数据库名称为：apple，那么一般需要给业务提供一个读写角色和一个只读角色：

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创建只读角色：

use admin;
db.createRole(
   {
     role: "apple_r",
     privileges: [
       { resource: { db: "apple", collection: "" }, actions: [ "find",  "listCollections","listIndexes"] }
     ],
     roles: []
   }
);

##################################

创建读写角色：

use admin;
db.createRole(
   {
     role: "apple_rw",
     privileges: [
       { resource: { db: "apple", collection: "" }, actions: [ "find",  "listCollections","listIndexes","insert","remove","update"] }
     ],
     roles: []
   }
);

##############################

创建只读账号：

use admin;
db.createUser({user:"apple_r",
               pwd:"123456",
               roles:[{role:"apple_r",db:"admin"}]});

###############################

创建读写账号：

use admin;
db.createUser({user:"apple_rw",
               pwd:"123456",
               roles:[{role:"apple_rw",db:"admin"}]});