Postgresql/psycopg2 即使用户和密码正确，密码验证错误
Postgresql/psycopg2 password authentication error even though user and password are correct
我是 Python 的网络开发新手，非常感谢您的帮助。我正在尝试在 WSL（Windows 机器）上设置 psycopg2/peewee。在我的 Python 代码中，我存储了访问 Postgres 数据库所需的所有信息，然后尝试按如下方式连接到数据库：
#lib/main.py
from peewee import *
db = PostgresqlDatabase('people', user='postgres', password='postgres', host='localhost', port=5432)
db.connect()
我确定我有一个名为 'postgres' 的 Postgres 用户，密码为 'postgres'。这些是我在使用 su - postgres.
更改为计算机上的 postgres 用户后用于启动 Postgres 服务器的凭据
当我使用 pipenv shell 启动我的 Python 虚拟环境然后 运行 python3 main.py 我收到以下错误：
// ♥ python3 main.py
Traceback (most recent call last):
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3035, in connect
self._state.set_connection(self._connect())
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3730, in _connect
conn = psycopg2.connect(database=self.database, **self.connect_params)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/psycopg2/__init__.py", line 127, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
**psycopg2.OperationalError: FATAL: password authentication failed for user "postgres"**
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "main.py", line 18, in <module>
db.connect()
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3038, in connect
self._initialize_connection(self._state.conn)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 2873, in __exit__
reraise(new_type, new_type(exc_value, *exc_args), traceback)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 183, in reraise
raise value.with_traceback(tb)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3035, in connect
self._state.set_connection(self._connect())
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3730, in _connect
conn = psycopg2.connect(database=self.database, **self.connect_params)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/psycopg2/__init__.py", line 127, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
peewee.OperationalError: FATAL: password authentication failed for user "postgres"
我很困惑为什么验证对有效的 user/password 组合失败！
我也尝试在 Python3 shell 中测试连接字符串：
>>>import psycopg2
>>>psycopg2.connect("dbname=postgres user=postgres host=localhost password=postgres port=5432")
我得到了同样的错误。对于为什么我无法将我的 Python 代码连接到 Postgres 的任何见解，我将不胜感激！
我的 pg_hba.conf 文件有以下内容：
# 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 md5 # IPv6 local connections:
host all all ::1/128 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
local replication all peer
host replication all 127.0.0.1/32 md5
host replication all ::1/128 md5
从命令行，ps ax |grep postgres 显示：
3218 ? S 0:00 /usr/lib/postgresql/10/bin/postgres -D /var/lib/postgresql/10/main -c config_file=/etc/postgresql/10/main/postgresql.conf
3220 ? Ss 0:00 postgres: 10/main: checkpointer process
3221 ? Ss 0:00 postgres: 10/main: writer process
3222 ? Ss 0:00 postgres: 10/main: wal writer process
3223 ? Ss 0:00 postgres: 10/main: autovacuum launcher process
3224 ? Ss 0:00 postgres: 10/main: stats collector process
3225 ? Ss 0:00 postgres: 10/main: bgworker: logical replication launcher
3337 tty1 S 0:00 grep --color=auto postgres
在 运行ning psql -d postgres -U postgres -h 127.0.0.1 并检查 Postgres 日志后，我看到：
2020-08-12 13:37:30.573 EDT [709] LOG: database system is shut down
2020-08-12 13:37:30.700 EDT [3218] LOG: listening on IPv4 address "127.0.0.1", port 5433 2020-08-12 13:37:30.714 EDT [3218] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5433"
2020-08-12 13:37:30.760 EDT [3219] LOG: database system was shut down at 2020-08-12 13:37:30 EDT
2020-08-12 13:37:30.816 EDT [3218] LOG: database system is ready to accept connections
2020-08-12 13:37:31.383 EDT [3226] [unknown]@[unknown] LOG: incomplete startup packet
2020-08-12 13:37:48.061 EDT [3254] postgres@postgres LOG: provided user name (postgres) and authenticated user name (allison_johnson) do not match
2020-08-12 13:37:48.061 EDT [3254] postgres@postgres FATAL: Peer authentication failed for user "postgres"
2020-08-12 13:37:48.061 EDT [3254] postgres@postgres DETAIL: Connection matched pg_hba.conf line 85: "local all postgres 20-08-12 13:42:30.909 EDT [3220] WARNING: could not flush dirty data: Function not implemented 2020-08-12 14:08:00.001 EDT [3443] allison_johnson@allison_johnson FATAL: password authentication failed for user "allison_johnson"
2020-08-12 14:08:00.001 EDT [3443] allison_johnson@allison_johnson DETAIL: Password does not match for user "allison_johnson".
Connection matched pg_hba.conf line 90: "local all all md5"
2020-08-12 14:13:49.143 EDT [3514] postgres@postgres LOG: provided user name (postgres) and authenticated user name (allison_johnson) do not match
2020-08-12 14:13:49.143 EDT [3514] postgres@postgres FATAL: Peer authentication failed for user "postgres"
2020-08-12 14:13:49.143 EDT [3514] postgres@postgres DETAIL: Connection matched pg_hba.conf line 85: "local all postgres $
pg_hba.conf 的第 85-90 行：
# Database administrative login by Unix domain socket
local all postgres peer
# TYPE DATABASE USER ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all md5
/main/postgresql.conf
中的端口和 listen_addresses 设置
#listen_addresses = 'localhost' # what IP address(es) to listen on;
# comma-separated list of addresses;
# defaults to 'localhost'; use '*' for all
# (change requires restart)
port = 5433 # (change requires restart)
答案的简短版本是在两个不同的 OS 中有两个 Postgres 运行 实例。较长的答案如下。在 WSL(2) 中，Postgres 实例 pg_hba.conf 为用户 postgres 设置了 local 为 peer，为所有用户设置为 md5。其中 md5 为本地主机 IPV4 和 IPV6 授权连接。这就是 Allison 可以从系统用户 postgres 帐户连接为数据库用户 postgres 的原因。更改 local
trust 的设置允许在不使用 -h 时从任何系统帐户进行连接。 localhost 的密码连接问题仍然存在。奇怪的是 Postgres 日志中没有这些连接的记录。 WSL 中没有其他 Postgres 运行 实例。在我思考了很长时间之后，很明显 Windows 中必须有一个服务器 运行。就是这种情况，它是抓住 localhost 连接并抛出密码错误的人。关闭它是解决这个问题的一个步骤。事实证明，Windows Postgres 在端口 5432 和 WSL 实例 5433 上 运行 并且 WSL 实例仅在 localhost 上侦听。将端口更改为 5432 并将 listen_addresses 更改为“*”允许 localhost 连接而不指定端口和 local 连接。
我是 Python 的网络开发新手，非常感谢您的帮助。我正在尝试在 WSL（Windows 机器）上设置 psycopg2/peewee。在我的 Python 代码中，我存储了访问 Postgres 数据库所需的所有信息，然后尝试按如下方式连接到数据库：
#lib/main.py
from peewee import *
db = PostgresqlDatabase('people', user='postgres', password='postgres', host='localhost', port=5432)
db.connect()
我确定我有一个名为 'postgres' 的 Postgres 用户，密码为 'postgres'。这些是我在使用 su - postgres.
当我使用 pipenv shell 启动我的 Python 虚拟环境然后 运行 python3 main.py 我收到以下错误：
// ♥ python3 main.py
Traceback (most recent call last):
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3035, in connect
self._state.set_connection(self._connect())
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3730, in _connect
conn = psycopg2.connect(database=self.database, **self.connect_params)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/psycopg2/__init__.py", line 127, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
**psycopg2.OperationalError: FATAL: password authentication failed for user "postgres"**
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "main.py", line 18, in <module>
db.connect()
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3038, in connect
self._initialize_connection(self._state.conn)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 2873, in __exit__
reraise(new_type, new_type(exc_value, *exc_args), traceback)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 183, in reraise
raise value.with_traceback(tb)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3035, in connect
self._state.set_connection(self._connect())
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/peewee.py", line 3730, in _connect
conn = psycopg2.connect(database=self.database, **self.connect_params)
File "/home/allison_johnson/.local/share/virtualenvs/lib-jEOreobP/lib/python3.6/site-packages/psycopg2/__init__.py", line 127, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
peewee.OperationalError: FATAL: password authentication failed for user "postgres"
我很困惑为什么验证对有效的 user/password 组合失败！
我也尝试在 Python3 shell 中测试连接字符串：
>>>import psycopg2
>>>psycopg2.connect("dbname=postgres user=postgres host=localhost password=postgres port=5432")
我得到了同样的错误。对于为什么我无法将我的 Python 代码连接到 Postgres 的任何见解，我将不胜感激！
我的 pg_hba.conf 文件有以下内容：
# 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 md5 # IPv6 local connections:
host all all ::1/128 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
local replication all peer
host replication all 127.0.0.1/32 md5
host replication all ::1/128 md5
从命令行，ps ax |grep postgres 显示：
3218 ? S 0:00 /usr/lib/postgresql/10/bin/postgres -D /var/lib/postgresql/10/main -c config_file=/etc/postgresql/10/main/postgresql.conf
3220 ? Ss 0:00 postgres: 10/main: checkpointer process
3221 ? Ss 0:00 postgres: 10/main: writer process
3222 ? Ss 0:00 postgres: 10/main: wal writer process
3223 ? Ss 0:00 postgres: 10/main: autovacuum launcher process
3224 ? Ss 0:00 postgres: 10/main: stats collector process
3225 ? Ss 0:00 postgres: 10/main: bgworker: logical replication launcher
3337 tty1 S 0:00 grep --color=auto postgres
在 运行ning psql -d postgres -U postgres -h 127.0.0.1 并检查 Postgres 日志后，我看到：
2020-08-12 13:37:30.573 EDT [709] LOG: database system is shut down
2020-08-12 13:37:30.700 EDT [3218] LOG: listening on IPv4 address "127.0.0.1", port 5433 2020-08-12 13:37:30.714 EDT [3218] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5433"
2020-08-12 13:37:30.760 EDT [3219] LOG: database system was shut down at 2020-08-12 13:37:30 EDT
2020-08-12 13:37:30.816 EDT [3218] LOG: database system is ready to accept connections
2020-08-12 13:37:31.383 EDT [3226] [unknown]@[unknown] LOG: incomplete startup packet
2020-08-12 13:37:48.061 EDT [3254] postgres@postgres LOG: provided user name (postgres) and authenticated user name (allison_johnson) do not match
2020-08-12 13:37:48.061 EDT [3254] postgres@postgres FATAL: Peer authentication failed for user "postgres"
2020-08-12 13:37:48.061 EDT [3254] postgres@postgres DETAIL: Connection matched pg_hba.conf line 85: "local all postgres 20-08-12 13:42:30.909 EDT [3220] WARNING: could not flush dirty data: Function not implemented 2020-08-12 14:08:00.001 EDT [3443] allison_johnson@allison_johnson FATAL: password authentication failed for user "allison_johnson"
2020-08-12 14:08:00.001 EDT [3443] allison_johnson@allison_johnson DETAIL: Password does not match for user "allison_johnson".
Connection matched pg_hba.conf line 90: "local all all md5"
2020-08-12 14:13:49.143 EDT [3514] postgres@postgres LOG: provided user name (postgres) and authenticated user name (allison_johnson) do not match
2020-08-12 14:13:49.143 EDT [3514] postgres@postgres FATAL: Peer authentication failed for user "postgres"
2020-08-12 14:13:49.143 EDT [3514] postgres@postgres DETAIL: Connection matched pg_hba.conf line 85: "local all postgres $
pg_hba.conf 的第 85-90 行：
# Database administrative login by Unix domain socket
local all postgres peer
# TYPE DATABASE USER ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all md5
/main/postgresql.conf
中的端口和 listen_addresses 设置#listen_addresses = 'localhost' # what IP address(es) to listen on;
# comma-separated list of addresses;
# defaults to 'localhost'; use '*' for all
# (change requires restart)
port = 5433 # (change requires restart)
答案的简短版本是在两个不同的 OS 中有两个 Postgres 运行 实例。较长的答案如下。在 WSL(2) 中，Postgres 实例 pg_hba.conf 为用户 postgres 设置了 local 为 peer，为所有用户设置为 md5。其中 md5 为本地主机 IPV4 和 IPV6 授权连接。这就是 Allison 可以从系统用户 postgres 帐户连接为数据库用户 postgres 的原因。更改 local
trust 的设置允许在不使用 -h 时从任何系统帐户进行连接。 localhost 的密码连接问题仍然存在。奇怪的是 Postgres 日志中没有这些连接的记录。 WSL 中没有其他 Postgres 运行 实例。在我思考了很长时间之后，很明显 Windows 中必须有一个服务器 运行。就是这种情况，它是抓住 localhost 连接并抛出密码错误的人。关闭它是解决这个问题的一个步骤。事实证明，Windows Postgres 在端口 5432 和 WSL 实例 5433 上 运行 并且 WSL 实例仅在 localhost 上侦听。将端口更改为 5432 并将 listen_addresses 更改为“*”允许 localhost 连接而不指定端口和 local 连接。