原 MongoDB 开启用户认证登录

db.createUser({user:'username',pwd:'password',roles:[{role:'root',db:'admin'}]}) 

show roles

{
	"role" : "__system",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "backup",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "clusterAdmin",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "clusterManager",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "clusterMonitor",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "dbAdmin",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "dbAdminAnyDatabase",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "dbOwner",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "enableSharding",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "hostManager",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "read",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "readAnyDatabase",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "readWrite",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "readWriteAnyDatabase",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "restore",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "root",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "userAdmin",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}
{
	"role" : "userAdminAnyDatabase",
	"db" : "admin",
	"isBuiltin" : true,
	"roles" : [ ],
	"inheritedRoles" : [ ]
}