mongodb root用户创建数据库提示not master的解决（mongodb数据库语句）这都可以

问题也比较简单， 就是master挂了

mongodb的集群似乎和mysql，redis的不太一样，这个我也不太清楚

总之单机不会出现这种情况，集群会出现

就是将master重启就可以了

是正常的，因为SECONDARY是不允许读写的，如果非要解决执行 rs.slaveOk() 这句命令就可以了

[yukw@mongodb4 data]$ https://www.jb51.net/article/mongo -port 20000

MongoDB shell version v3.4.4

connecting to: mongodb://127.0.0.1:20000/

MongoDB server version: 3.4.4

Server has startup warnings:

2019-07-31T17:06:43.397+0800 I CONTROL  [initandlisten]

2019-07-31T17:06:43.397+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.

2019-07-31T17:06:43.398+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.

2019-07-31T17:06:43.398+0800 I CONTROL  [initandlisten]

2019-07-31T17:06:43.398+0800 I CONTROL  [initandlisten]

2019-07-31T17:06:43.398+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is ‘always’.

2019-07-31T17:06:43.398+0800 I CONTROL  [initandlisten] **        We suggest setting it to ‘never’

2019-07-31T17:06:43.398+0800 I CONTROL  [initandlisten]

2019-07-31T17:06:43.398+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is ‘always’.

2019-07-31T17:06:43.398+0800 I CONTROL  [initandlisten] **        We suggest setting it to ‘never’

2019-07-31T17:06:43.398+0800 I CONTROL  [initandlisten]

> show users

2019-07-31T17:07:33.469+0800 E QUERY    [thread1] Error: not master and slaveOk=false :

_getErrorWithCode@src/mongo/shell/utils.js:25:13

DB.prototype.getUsers@src/mongo/shell/db.js:1537:1

shellHelper.show@src/mongo/shell/utils.js:752:9

shellHelper@src/mongo/shell/utils.js:659:15

@(shellhelp2):1:1

> show dbs

2019-07-31T17:07:39.126+0800 E QUERY    [thread1] Error: listDatabases failed:{

    “ok” : 0,

    “errmsg” : “not master and slaveOk=false”,                    ##报错提示

    “code” : 13435,

    “codeName” : “NotMasterNoSlaveOk”

} :

_getErrorWithCode@src/mongo/shell/utils.js:25:13

Mongo.prototype.getDBs@src/mongo/shell/mongo.js:62:1

shellHelper.show@src/mongo/shell/utils.js:769:19

shellHelper@src/mongo/shell/utils.js:659:15

@(shellhelp2):1:1

> rs.slaveOk();                                   ##执行命令    

> show dbs

local  0.000GB

> show users

> 

好了，这就是解决not master and slaveOk=false的方法了

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。