mongo如何在没有权限的情况下删除数据库?

由于某种不可描述的原因,我需要删除mongo的一个数据库,但是我手上的账号的权限很尴尬:
下面是我的账号权限

> show users;
{
    "_id" : "admin.admin",
    "user" : "admin",
    "db" : "admin",
    "roles" : [
        {
            "role" : "readWriteAnyDatabase",
            "db" : "admin"
        }
    ]
}

然后:

> db.dropDatabase()
{
    "ok" : 0,
    "errmsg" : "not authorized on cld_edu to execute command { dropDatabase: 1.0 }",
    "code" : 13,
    "codeName" : "Unauthorized"
}

我想着改一下权限呢?结果...

> db.grantRolesToUser('admin',[{role:'root',db:'admin'}])

这tm就很尴尬了..反正就干啥都不成

> show users;
2019-10-30T14:47:47.370+0800 E QUERY    [thread1] Error: not authorized on admin to execute command { usersInfo: 1.0 } :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
DB.prototype.getUsers@src/mongo/shell/db.js:1539:1
shellHelper.show@src/mongo/shell/utils.js:797:9
shellHelper@src/mongo/shell/utils.js:704:15
@(shellhelp2):1:1

> db.system.users.find()
Error: error: {
    "ok" : 0,
    "errmsg" : "not authorized on admin to execute command { find: \"system.users\", filter: {} }",
    "code" : 13,
    "codeName" : "Unauthorized"
}

最后,哥灵光一闪

$ ps -e | grep mongod
 3265 ?        17:03:42 mongod

然后$ kill -2 3265杀掉
再mongod --config /etc/mongod.conf重启
mongo进入shell

> db.dropDatabase()
{ "dropped" : "cld_edu", "ok" : 1 }

嘿嘿嘿:smile:
然后关掉mongo服务> db.shutdownServer()
再把带授权开启服务

$ mongod --auth --config /etc/mongod.conf

哈哈哈哈 我真他娘的是个天才