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,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中为用户提供超级用户?
psql: FATAL: Peer authentication failed for user "thisone"
和其他用户的相同错误意味着,你尝试使用不同的os用户连接套接字(例如,os用户是cchilders
,你尝试psql -U postgres
),而peer
means you have to be logged in same OS user。例如,要在psql -U thisone
成功,你应该在sudo su - thisone
之前。如果你没有这样的OS用户,你就无法连接peer
身份验证。因此要么将hba_file peer
更改为trust
进行无密码,要么将md5
更改为密码身份验证,以使postgres不是同一个os用户...
为你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。你应该使用\du
metacommand和psql, or add
rolsuper`列,所以它将是:
select rolname from pg_roles where rolsuper;