postgres不允许alter role superuser和我的默认用户不是超级用户

时间:2017-04-29 05:25:00

标签: postgresql elixir phoenix-framework psql pg-hba.conf

我无法使用elixir连接到postgres:

** (Mix) The database for PhoenixChat.Repo couldn't be created: FATAL 28P01 (invalid_password): password authentication failed for user "postgres"

00:08:59.053 [error] GenServer #PID<0.3214.0> terminating
** (Postgrex.Error) FATAL 28P01 (invalid_password): password authentication failed for user "postgres"
    (db_connection) lib/db_connection/connection.ex:148: DBConnection.Connection.connect/2
    (connection) lib/connection.ex:622: Connection.enter_connect/5
    (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
Last message: nil
State: Postgrex.Protocol

我无法理解数据库如何允许用户在没有超级用户的情况下制作用户。从我的普通用户来看,它不允许给予超级用户角色:

$ psql -U thisone --password
Password for user thisone: 
psql: FATAL:  Peer authentication failed for user "thisone"

$ psql -U fakeuser
psql: FATAL:  Peer authentication failed for user "fakeuser"

cchilders=> alter user postgres superuser;
ERROR:  must be superuser to alter superusers
cchilders=> select rolname from pg_roles;
  rolname  
-----------
 postgres
 cchilders
 fakeuser
 thisone
(4 rows)

$ psql -U postgres --password
Password for user postgres: 
psql: FATAL:  Peer authentication failed for user "postgres"

如果没有超级用户,如何在postgres中为超级用户提供超级用户?

1 个答案:

答案 0 :(得分:2)

psql: FATAL: Peer authentication failed for user "thisone"和其他用户的相同错误意味着,您尝试使用不同的os用户连接套接字(例如,os用户为cchilders并且您尝试psql -U postgres),而peer 1}} m eans you have to be logged in same OS user。例如,要psql -U thisone成功,您应该在sudo su - thisone之前成功。如果您没有此类OS用户,则无法使用peer身份验证进行连接。因此,要么将 hba_file peer更改为trust以获取无密码,要么将md5更改为密码身份验证,以使postgres与用户不同...

对于你sudo -u postgres psql工作,因为你有os用户postgres(例如osx不是这种情况)..

最后,您列出了用户,而不是检查他们是否是超级用户。您应\du使用psql, or add rolsuper`列进行metacommand,因此它将是:

select rolname from pg_roles where rolsuper;