得到错误：“Unix域套接字上的连接”/var/run/postgresql/.s.PGSQL.5432“？”尝试用centos上的postgresql创建用户

Question

完整错误：

Creating 'pcore' PostgreSQL user... psql: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

Connecting to PostgreSQL as 'pcore'... 
 ** Error occurred during execution: FATAL:  Ident authentication failed for user "pcore"

PostgreSQL的：

psql -U postgres template1
psql (8.4.9)
Type "help" for help.

template1=# \l
                                  List of databases
   Name    |  Owner   | Encoding |  Collation  |    Ctype    |   Access privileges   
-----------+----------+----------+-------------+-------------+-----------------------
 postgres  | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres
                                                             : postgres=CTc/postgres
 template1 | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres
                                                             : postgres=CTc/postgres
(3 rows)

Linux的：

lsb_release -a
LSB Version:    :core-4.0-ia32:core-4.0-noarch:graphics-4.0-ia32:graphics-4.0-noarch:printing-4.0-ia32:printing-4.0-noarch
Distributor ID: CentOS
Description:    CentOS release 5.7 (Final)
Release:    5.7
Codename:   Final

也：

ps -ef | grep post

user   25055 25032  0 11:13 pts/1    00:00:00 grep post
postgres 32104     1  0 Jan20 ?        00:00:00 /usr/bin/postmaster -p 5432 -D /var/lib/pgsql/data

/ etc / passwd中没有用户pcore这可能是问题，postgresql期望linux用户和postgresql用户之间的一对一匹配？

我正在尝试在发生此错误时创建用户：

# Database imports
import pgdb as psql

# This will create the 'pcore' user using `su` to run the
# command as the postgres system user
def createPsqlPcoreUser(new_pass):
    print "Creating 'pcore' PostgreSQL user...",
    sys.stdout.flush()
    cmd_list = ['su', '-', 'postgres', '-c','psql --host=%s -c '\
        '"CREATE USER pcore WITH PASSWORD \'%s\' CREATEDB"' % \
        (PSQL_SOCKET_PATH, new_pass)]
    p1 = subprocess.Popen(cmd_list,
        stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    p1.wait()
    print p1.communicate()[0]

另外：

 sudo -u postgres createuser pcore -P
Enter password for new role: 
Enter it again: 
Shall the new role be a superuser? (y/n) y
createuser: could not connect to database postgres: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
[root@localhost pcore]# service postgresql status
postmaster (pid 28901 28900 28899 28898 28896 28894) is running...
[root@localhost pcore]# ps -ef | grep post
postgres 28894     1  0 00:21 ?        00:00:00 /usr/bin/postmaster -p 5432 -D /var/lib/pgsql/data
postgres 28896 28894  0 00:21 ?        00:00:00 postgres: logger process                          
postgres 28898 28894  0 00:21 ?        00:00:00 postgres: writer process                          
postgres 28899 28894  0 00:21 ?        00:00:00 postgres: wal writer process                      
postgres 28900 28894  0 00:21 ?        00:00:00 postgres: autovacuum launcher process             
postgres 28901 28894  0 00:21 ?        00:00:00 postgres: stats collector process   

Answer 1

引人入胜的错误。看起来您的用户可以正确连接套接字，但postgres用户不能。我觉得这很奇怪。我的猜测是postgres用户的个人资料有问题。

我建议开始使用printenv作为普通用户和postgres用户并进行比较。特别要看PGPORT和PGHOST变量，因为它们可以确定套接字位置。这是第一个开始的地方。

其次，您可以检查postgresql.conf中的socket目录，并将PGHOST设置为绝对目录路径。这可能会解决您的问题，但系统上的用户帐户级别会出现问题。