Question

我是网络开发的新手。

首先，我在我的vps（Ubuntu 16.04）上部署了一个静态网站，没有问题，然后我尝试添加一个博客应用程序。

它在PostgreSQL本地运行良好，但我无法在我的服务器上运行。好像它试图用我的Unix用户连接到Postgres。

为什么我的服务器会尝试这样做？

我确实通过postgres用户创建了一个数据库和一个所有者，匹配settings.py中的登录信息，我希望psycopg2尝试使用这些登录信息连接到数据库：

Settings.py + python-decouple：

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': config ('NAME'),
        'USER': config ('USER'),
        'PASSWORD': config ('PASSWORD'),
        'HOST': 'localhost',
        'PORT': '',
    }
}

这是我每次尝试./manage.py migrate

时收到的错误消息

＆＃39; myportfolio＆＃39;是我的Unix用户名，数据库用户名是不同的：

Traceback (most recent call last):
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
    self.connect()
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/backends/base/base.py", line 194, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/backends/postgresql/base.py", line 168, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/home/myportfolio/lib/python3.5/site-packages/psycopg2/__init__.py", line 130, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: FATAL:  password authentication failed for user "myportfolio"
FATAL:  password authentication failed for user "myportfolio"


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "./manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "/home/myportfolio/lib/python3.5/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
    utility.execute()
  File "/home/myportfolio/lib/python3.5/site-packages/django/core/management/__init__.py", line 365, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/myportfolio/lib/python3.5/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/myportfolio/lib/python3.5/site-packages/django/core/management/base.py", line 335, in execute
    output = self.handle(*args, **options)
  File "/home/myportfolio/lib/python3.5/site-packages/django/core/management/commands/migrate.py", line 79, in handle
    executor = MigrationExecutor(connection, self.migration_progress_callback)
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/migrations/executor.py", line 18, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/migrations/loader.py", line 49, in __init__
    self.build_graph()
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/migrations/loader.py", line 206, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/migrations/recorder.py", line 61, in applied_migrations
    if self.has_table():
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/migrations/recorder.py", line 44, in has_table
    return self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor())
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/backends/base/base.py", line 255, in cursor
    return self._cursor()
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/backends/base/base.py", line 232, in _cursor
    self.ensure_connection()
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
    self.connect()
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
    self.connect()
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/backends/base/base.py", line 194, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/home/myportfolio/lib/python3.5/site-packages/django/db/backends/postgresql/base.py", line 168, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/home/myportfolio/lib/python3.5/site-packages/psycopg2/__init__.py", line 130, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: FATAL:  password authentication failed for user "myportfolio"
FATAL:  password authentication failed for user "myportfolio"

我试图：

删除我的django代码，重新安装
删除/清除postgres并重新安装
修改pg_hba.conf本地信任

有一次，我确实创建了一个名为“myportfolio”的django超级用户。作为我的unix用户：这可能会产生问题吗？

Answer 1

所以我只是停留在这个问题上，我想我可以通过发布实际的命令来保存任何遇到此问题的人。这是在我的树莓派上完成的。

sudo su - postgres
postgres@raspberrypi:~$ psql
postgres=# CREATE DATABASE websitenamehere
postgres=# CREATE USER mywebsiteuser WITH PASSWORD 'Password';
postgres=# GRANT ALL PRIVILEDGES ON DATABASE websitenamehere to mywebsiteuser;
postgres=# \q

完成，您现在已经创建了一个用户。

Answer 2

在配置中设置为用户的是什么（＆＃39; USER＆＃39;）。出现错误：

致命：用户＆＃34; myportfolio＆＃34;
的密码验证失败

用户 myportfolio ，因此如果该用户不存在，您将需要创建该用户。

Answer 3

根据错误，很明显失败的时候是你的应用程序尝试postgres，而重要的部分是身份验证。

首先要了解并重现此问题，请执行以下步骤。我将其视为Linux服务器并推荐这些步骤。

第1步：

$ python3

>>>import psycopg2
>>>psycopg2.connect("dbname=postgres user=postgres host=localhost password=oracle port=5432")
>>>connection object at 0x5f03d2c402d8; dsn: 'host=localhost port=5432 dbname=postgres user=postgres password=xxx', closed: 0

你应该收到这样的消息。这是一个成功的消息。

当我使用错误的密码时，我收到此错误。

>>>psycopg2.connect("dbname=postgres user=postgres host=localhost password=wrongpassword port=5432")
>>>Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.5/dist-packages/psycopg2/__init__.py", line 130, in connect conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: FATAL:  password authentication failed for user "postgres"
FATAL:  password authentication failed for user "postgres"

当pg_hba.conf文件中没有条目时，我收到以下错误。

>>> psycopg2.connect("dbname=postgres user=postgres host=localhost password=oracle port=5432 ")
>>> Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.5/dist-packages/psycopg2/__init__.py", line 130, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: FATAL:  no pg_hba.conf entry for host "::1", user "postgres", database "postgres", SSL on
FATAL:  no pg_hba.conf entry for host "::1", user "postgres", database "postgres", SSL off

所以，问题在于密码。检查您的密码是否包含任何特殊字符或空格。如果您的密码有空格或特殊字符，请使用我在下面使用的双引号。

>>> psycopg2.connect(dbname="postgres", user="postgres", password="passwords with spaces", host="localhost", port ="5432")

如果上述步骤一切正常，并且您获得了成功消息，则很明显问题出在您的dsn上。打印传递给这些变量的值。

DATABASES = {

'default': {
    'ENGINE': 'django.db.backends.postgresql_psycopg2',
    'NAME': config ('NAME'),
    'USER': config ('USER'),
    'PASSWORD': config ('PASSWORD'),
    'HOST': 'localhost',
    'PORT': '',
}

}

验证是否正确替换了所有值。您可能拥有该用户的正确密码，但dsn没有为该用户选择正确的密码。查看是否可以打印dsn并验证连接字符串是否完美生成。你会得到修复。

Answer 4

尝试这样的事情：

DATABASES = {
   'default': {
   'ENGINE': 'django.db.backends.sqlite3',
   'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
 }
}

Answer 5

如果您的密码中包含一些Postgres无法应付的特殊字符（除非您进行某些特殊编码），也会出现此问题。

psycopg2.OperationalError：致命：用户密码验证失败＆＃34; <my unix =“”user =“”>＆＃34;

5 个答案:

第1步：