如何在potgresql中启动GSSAPI

Question

我在REDHAT 7中安装了postgres。然后我安装了python 3.6。我创建了虚拟环境。我还在postgres中创建了一个表。然后我执行了这个python脚本，我得到了一些错误

import psycopg2
conn = psycopg2.connect("dbname=postgres user=postgres host=localhost password=postgres")

错误是：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/data/scripts/san-automation/lib/python3.7/site-packages/psycopg2/__init__.py", line 126, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: could not initiate GSSAPI security context: Unspecified GSS failure.  Minor code may provide more information
could not initiate GSSAPI security context: Server not found in Kerberos database
FATAL:  Ident authentication failed for user "postgres"

cat/var/lib/pgsql/12/data/pg_hba.conf

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     peer
# IPv4 local connections:
host    all             all             127.0.0.1/32            trust
# IPv6 local connections:
host    all             all             ::1/128                 ident
# Allow replication connections from localhost, by a user with the
# replication privilege.
local   replication     all                                     peer
host    replication     all             127.0.0.1/32            ident
host    replication     all             ::1/128                 ident

Answer 1

它看起来像是在抢先加载您的gss/kerberos配置文件（即使它不打算使用它们），并在其中发现了它不喜欢的东西。但这似乎只是一个警告。真正的错误是最后一行：

FATAL: Ident authentication failed for user "postgres"

我不认为这与GSS有任何关系。查看服务器的日志文件以了解ident失败的原因

如果您显示的pg_hba.conf是有效的，那么在您的系统上，localhost必须解析为：：1，而不是127.0.0.1。也就是说，它使用的是ipv6而不是ipv4