mongodb连接出错

Question

明明db.auth返回1，可是mongo -u admin -p就是失败，为啥呢？

andyliwr@andyliwrPC:~/文档/xiaodiFTP/nodejs/xiaodiTodoList$ mongo
MongoDB shell version: 2.6.10
connecting to: test
> use admin
switched to db admin
> db.auth("admin", "123456")
1
> db.auth("admin", "1234535")
Error: 18 { ok: 0.0, errmsg: "auth failed", code: 18 }
0
> exit
bye
andyliwr@andyliwrPC:~/文档/xiaodiFTP/nodejs/xiaodiTodoList$ mongo -u admin -p
MongoDB shell version: 2.6.10
Enter password: 
connecting to: test
2016-07-31T22:41:33.520+0800 Error: 18 { ok: 0.0, errmsg: "auth failed", code: 18 } at src/mongo/shell/db.js:1287
exception: login failed

Answer 1

你的用户是在admin这个数据库中的，而默认连接的数据库是test，自然认证会失败，你应该在使用mongo连接时指定数据库为admin，这样才能进行正确的认证：

mongo -u admin -p admin

Answer 2

mongo localhost/admin -u admin -p
// or
mongo -u admin -p --authenticationDatabase admin

都是为了指定使用admin这个库中的用户来认证。有困难找文档，或者看一下--help。我机器上的是3.2，可能会和你的2.6有些出入。

$ mongo --help
MongoDB shell version: 3.2.6
usage: mongo [options] [db address] [file names (ending in .js)]
db address can be:
  foo                   foo database on local machine
  192.169.0.5/foo       foo database on 192.168.0.5 machine
  192.169.0.5:9999/foo  foo database on 192.168.0.5 machine on port 9999
Options:
  --shell                             run the shell after executing files
  --nodb                              don't connect to mongod on startup - no
                                      'db address' arg expected
  --norc                              will not run the ".mongorc.js" file on
                                      start up
  --quiet                             be less chatty
  --port arg                          port to connect to
  --host arg                          server to connect to
  --eval arg                          evaluate javascript
  -h [ --help ]                       show this usage information
  --version                           show version information
  --verbose                           increase verbosity
  --ipv6                              enable IPv6 support (disabled by default)
  --disableJavaScriptJIT              disable the Javascript Just In Time
                                      compiler
  --enableJavaScriptProtection        disable automatic JavaScript function
                                      marshalling
  --ssl                               use SSL for all connections
  --sslCAFile arg                     Certificate Authority file for SSL
  --sslPEMKeyFile arg                 PEM certificate/key file for SSL
  --sslPEMKeyPassword arg             password for key in PEM file for SSL
  --sslCRLFile arg                    Certificate Revocation List file for SSL
  --sslAllowInvalidHostnames          allow connections to servers with
                                      non-matching hostnames
  --sslAllowInvalidCertificates       allow connections to servers with invalid
                                      certificates
  --sslFIPSMode                       activate FIPS 140-2 mode at startup

Authentication Options:
  -u [ --username ] arg               username for authentication
  -p [ --password ] arg               password for authentication
  --authenticationDatabase arg        user source (defaults to dbname)
  --authenticationMechanism arg       authentication mechanism
  --gssapiServiceName arg (=mongodb)  Service name to use when authenticating
                                      using GSSAPI/Kerberos
  --gssapiHostName arg                Remote host name to use for purpose of
                                      GSSAPI/Kerberos authentication