Django BaseCommand 在本地工作但不在 Amazon AWS EB 上工作

Question

所以，我正在使用 Amazon AWS EB + RDS 数据库部署 Django 网站。

除了我负责以编程方式填充数据库的脚本外，一切正常。按照这个非常简短的教程，我设法在本地运行ning 获得了它： http://eli.thegreenplace.net/2014/02/15/programmatically-populating-a-django-database 所以在本地它按预期工作。

当我在我的亚马逊 AWS EB 上运行这个脚本时，我的问题就来了（无论是使用 cron 还是手动激活我的环境）。

我收到此错误消息：

'''
Traceback (most recent call last):
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
    self.connect()
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/backends/base/base.py", line 189, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/backends/postgresql/base.py", line 176, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/opt/python/run/venv/local/lib64/python3.4/site-packages/psycopg2/__init__.py", line 130, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: could not connect to server: Connection refused
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port 5432?


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

Traceback (most recent call last):
  File "/opt/python/current/app/BetzCenter/manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/core/management/__init__.py", line 363, in execute_from_command_line
    utility.execute()
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/core/management/__init__.py", line 355, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/core/management/base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "/opt/python/bundle/18/app/BetzCenter/gamestream/management/commands/odds.py", line 444, in handle
    self.create_gamepages(self.all_fixtures())
  File "/opt/python/bundle/18/app/BetzCenter/gamestream/management/commands/odds.py", line 433, in create_gamepages
    for fixture in fixtures:
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/models/query.py", line 250, in __iter__
    self._fetch_all()
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/models/query.py", line 1118, in _fetch_all
    self._result_cache = list(self._iterable_class(self))
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/models/query.py", line 53, in __iter__
    results = compiler.execute_sql(chunked_fetch=self.chunked_fetch)
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/models/sql/compiler.py", line 882, in execute_sql
    cursor = self.connection.cursor()
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/backends/base/base.py", line 254, in cursor
    return self._cursor()
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/backends/base/base.py", line 229, in _cursor
    self.ensure_connection()
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
    self.connect()
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/utils/six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
    self.connect()
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/backends/base/base.py", line 189, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/opt/python/run/venv/local/lib/python3.4/site-packages/django/db/backends/postgresql/base.py", line 176, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/opt/python/run/venv/local/lib64/python3.4/site-packages/psycopg2/__init__.py", line 130, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: could not connect to server: Connection refused
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port 5432?
'''

如果我手动使用带有 sql 语句的 psycopg2 代码，脚本运行很好（在 AWS EB 上），但未能使用我认为我添加的 Django 设置已链接。

虽然我真的希望能够为这个脚本使用 django 命令。

关于如何调试它有什么想法吗？谷歌搜索目前对我帮助不大。

更新 --> 我很确定我的 "normal" python 脚本没有指向正确的数据库。事实上，我现在已经尝试打印它指向的数据库，我是对的。它不指向我的亚马逊 RDS 数据库（但寻找本地数据库），而我的 Django 应用程序的其余部分指向它。我已经尝试了在 Whosebug 上到处找到的解决方案。我应该从哪里开始调试呢？ ;)

谢谢！维托里奥

Answer 1

所以几个月后我又回到了这里并设法对其进行了排序。我是个变数。经过一些研究并尝试了一些解决方案后，这对我有用：

我在 crontab 文件中添加了这个，我在其中调用命令（在激活虚拟环境之后和运行命令本身之前：

&& source /opt/python/current/env

如果我理解正确，这是特定于 AWS elastick beanstalk 的，并且传递了所有正确的变量，这样我的命令就不会失败。整个 crontab 行现在看起来像：

0,30 * * * * source /opt/python/run/venv/bin/activate && source /opt/python/current/env && python /opt/python/current/app/my_site/manage.py my_command

希望对您有所帮助。

Django BaseCommand 在本地工作但不在 Amazon AWS EB 上工作

Django BaseCommand works locally but does not work on Amazon AWS EB

python

django

amazon-web-services

amazon-rds

amazon-elastic-beanstalk