我得到了错误:

FATAL: Peer authentication failed for user "postgres"

当我尝试让postgres与Rails一起工作时。

这是pg_hba.conf,我的数据库。Yml,以及完整跟踪的转储。

我在pg_hba中将身份验证更改为md5,并尝试了不同的方法,但似乎都不起作用。

我还尝试按照Rails 3.2创建一个新用户和数据库,FATAL: Peer authentication failed for user (PG::Error)

但是它们不会在pgadmin上显示,甚至当我运行sudo -u postgres psql -l时也不会显示。

知道我哪里错了吗?


当前回答

如果您通过localhost(127.0.0.1)连接,则不应该遇到这个特定问题。我不会对pg_hba.conf做太多的改动,但我会调整你的连接字符串:

psql -U someuser -h 127.0.0.1 database

其中someuser是你连接的用户,database是你的用户有权限连接的数据库。

下面是我在Debian上设置postgres的方法:

http://www.postgresql.org/download/linux/debian/  (Wheezy 7.x)

as root …

    root@www0:~# echo "deb http://apt.postgresql.org/pub/repos/apt/ wheezy-pgdg main" >> /etc/apt/sources.list

    root@www0:~# wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -

    root@www0:~# apt-get update

    root@www0:~# apt-get install postgresql-9.4        

    root@www0:~# su - postgres 

    postgres@www0:~$ createuser --interactive -P someuser
    Enter password for new role:
    Enter it again:
    Shall the new role be a superuser? (y/n) n
    Shall the new role be allowed to create databases? (y/n) y
    Shall the new role be allowed to create more new roles? (y/n) n

    postgres@www0:~$ createdb -O someuser database

    postgres@www0:~$ psql -U someuser -h 127.0.0.1 database

享受吧!

其他回答

安装Postgresql后,我执行了以下步骤。

Open the file pg_hba.conf. For Ubuntu, use for example /etc/postgresql/13/main$ sudo nano pg_hba.conf and change this line at the bottom of the file, it should be the first line of the settings: local all postgres peer to local all postgres trust Side note: If you want to be able to connect with other users as well, you also need to change: local all all peer to local all all md5 If you used nano editor, exit with double Escape, x, y, Enter to save the config file. Restart the server $ sudo service postgresql restart Output: * Restarting PostgreSQL 13 database server Login into psql and set your password $ psql -U postgres db> ALTER USER postgres with password 'your-pass'; Output: ALTER ROLE Side note: If you have other users, they will need a password as well: db> ALTER USER my_user with password 'your-pass'; Then enter: exit Finally change the pg_hba.conf from local all postgres trust to local all postgres md5 Restart the server again $ sudo service postgresql restart Output: * Restarting PostgreSQL 13 database server Login at psql with postgres user After restarting the postgresql server, the postgres user accepts the password that you chose: psql -U postgres Output: Password for user postgres: psql (13.4 (Ubuntu 13.4-1.pgdg20.04+1)) Type "help" for help. And you are in psql: postgres=# Side note: Same now works for my_user if you added the user and password: psql -d YOUR_DB_NAME -U my_user Which will ask you for the new password of my_user.

认证方法详细说明:

信任——任何可以连接到服务器的人都被授权访问数据库

对端-使用客户端操作系统用户名作为数据库用户名访问它。

Md5基于密码的认证

如需进一步参考资料,请点击这里

上面的编辑对我来说是有效的,因为我发现在做了这些编辑之后我需要重新启动postgres服务器。 ubuntu的:

sudo /etc/init.d/postgresql restart

在连接中使用host=localhost。

PGconn *conn = PQconnectdb(
    "host=localhost user=postgres dbname=postgres password=123"
);

我的问题是我没有输入任何服务器。我以为它是默认的,因为占位符,但当我输入localhost它工作。

sudo psql --host=localhost --dbname=database-name --username=postgres

这解决了我的问题