readthedocs 自托管 AttributeError：“设置”对象没有属性“REDIS”答案

【问题标题】：readthedocs self-hosting AttributeError: 'Settings' object has no attribute 'REDIS'readthedocs 自托管 AttributeError：“设置”对象没有属性“REDIS”
【发布时间】：2015-09-09 16:01:18
【问题描述】：

尝试在内部自行托管 readthedocs，但对 Django 的经验很少。

我已按照 readthedocs 上的所有步骤（在我拥有的 /usr/share/ 中创建 virtualenv 并拥有组所有权 www-data）用于开发网络服务器，并且工作正常。

已采取以下附加步骤将 wsgi 和 apache 设置为 selfhost：

安装了额外的依赖项
- sudo apt-get install libapache2-mod-wsgi libpq-dev redis-server
- cd /usr/share/readthedocs/
- pip install psycopg2 redis django-redis-cache django-redis-sessions
- pip install --upgradehiredis
将 redis 配置为侦听套接字并放宽对 777 的权限

apache 被配置为一个虚拟主机：

<VirtualHost *:80>
    ServerName docs.vagrant

    WSGIScriptAlias / /usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/wsgi.py
    WSGIProcessGroup www-data
    WSGIDaemonProcess www-data \
    python-path=/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/:/usr/share/readthedocs/lib/python2.7/site-packages/:/usr/share/readthedocs/:/usr/share/readthedocs/checkouts/readthedocs.org/:/usr/share/readthedocs/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/

    <Directory /usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/>
        <Files wsgi.py>
        Require all granted
        </Files>
    </Directory>
</VirtualHost>

并且流量似乎正确地流向了后端。然而，RTD 抱怨缺少 REDIS 属性。 Apache 错误日志输出：

[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Starting process 'www-data' with uid=33, gid=33 and threads=15.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Initializing Python.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Attach interpreter ''.
[wsgi:info] [pid 19596] mod_wsgi (pid=19596): Attach interpreter ''.
[wsgi:info] [pid 19597] mod_wsgi (pid=19597): Attach interpreter ''.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/' to path.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/lib/python2.7/site-packages/' to path.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/' to path.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/checkouts/readthedocs.org/' to path.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/' to path.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Create interpreter 'docs.vagrant:3380|'.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/' to path.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/lib/python2.7/site-packages/' to path.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/' to path.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/checkouts/readthedocs.org/' to path.
[wsgi:info] [pid 19595] mod_wsgi (pid=19595): Adding '/usr/share/readthedocs/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/' to path.
[wsgi:info] [pid 19595] [remote 10.0.2.2:512] mod_wsgi (pid=19595, process='www-data', application='docs.vagrant:3380|'): Loading WSGI script '/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/wsgi.py'.
[wsgi:info] [pid 19624] mod_wsgi (pid=19624): Initializing Python.
[wsgi:info] [pid 19624] mod_wsgi (pid=19624): Attach interpreter ''.
[wsgi:error] [pid 19595] [09/Sep/2015 10:30:01] WARNING [readthedocs.api.client:16] SLUMBER_USERNAME/PASSWORD settings are not set
[wsgi:error] [pid 19595] [remote 10.0.2.2:512] mod_wsgi (pid=19595): Exception occurred processing WSGI script '/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/wsgi.py'.
[wsgi:error] [pid 19595] [remote 10.0.2.2:512] Traceback (most recent call last):
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 170, in __call__
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]     self.load_middleware()
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/core/handlers/base.py", line 52, in load_middleware
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]     mw_instance = mw_class()
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/middleware/locale.py", line 24, in __init__
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]     for url_pattern in get_resolver(None).url_patterns:
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/core/urlresolvers.py", line 402, in url_patterns
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]     patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/core/urlresolvers.py", line 396, in urlconf_module
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]     self._urlconf_module = import_module(self.urlconf_name)
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]   File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]     __import__(name)
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]   File "/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/urls.py", line 8, in <module>
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]     from readthedocs.api.base import (ProjectResource, UserResource,
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]   File "/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/api/base.py", line 28, in <module>
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]     redis_client = redis.Redis(**settings.REDIS)
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/conf/__init__.py", line 49, in __getattr__
[wsgi:error] [pid 19595] [remote 10.0.2.2:512]     return getattr(self._wrapped, name)
[wsgi:error] [pid 19595] [remote 10.0.2.2:512] AttributeError: 'Settings' object has no attribute 'REDIS'
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327] mod_wsgi (pid=19595): Exception occurred processing WSGI script '/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/wsgi.py'.
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327] Traceback (most recent call last):
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 170, in __call__
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]     self.load_middleware()
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/core/handlers/base.py", line 52, in load_middleware
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]     mw_instance = mw_class()
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/middleware/locale.py", line 24, in __init__
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]     for url_pattern in get_resolver(None).url_patterns:
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/core/urlresolvers.py", line 402, in url_patterns
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]     patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/core/urlresolvers.py", line 396, in urlconf_module
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]     self._urlconf_module = import_module(self.urlconf_name)
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]   File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]     __import__(name)
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]   File "/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/urls.py", line 8, in <module>
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]     from readthedocs.api.base import (ProjectResource, UserResource,
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]   File "/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/api/base.py", line 28, in <module>
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]     redis_client = redis.Redis(**settings.REDIS)
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]   File "/usr/share/readthedocs/lib/python2.7/site-packages/django/conf/__init__.py", line 49, in __getattr__
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327]     return getattr(self._wrapped, name)
[wsgi:error] [pid 19595] [remote 10.0.2.2:51327] AttributeError: 'Settings' object has no attribute 'REDIS'

我意识到我还需要启用弹性搜索并进行正确配置，但是当我走到那一步时，我会越过那座桥。

更新：发出命令grep -i redis /usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/settings/* 返回

__init__.py:        'BACKEND': 'redis_cache.RedisCache',
__init__.py:            'PARSER_CLASS': 'redis.connection.HiredisParser'
onebox.py:REDIS = {
onebox.py:BROKER_URL = 'redis://localhost:6379/0'
onebox.py:CELERY_RESULT_BACKEND = 'redis://localhost:6379/0'
onebox.py:        'BACKEND': 'redis_cache.cache.RedisCache',
onebox.py:            'CLIENT_CLASS': 'redis_cache.client.DefaultClient',
postgres.py:        'BACKEND': 'redis_cache.RedisCache',
postgres.py:            'PARSER_CLASS': 'redis.connection.HiredisParser'
sqlite.py:REDIS = {
sqlite.py:BROKER_URL = 'redis://localhost:6379/0'
sqlite.py:CELERY_RESULT_BACKEND = 'redis://localhost:6379/0'

所以我已重新配置 redis 以不再使用套接字并返回绑定/端口，但问题仍然存在（使用相同的堆栈跟踪）。

【问题讨论】：

它可以与开发服务器一起使用吗？
是的，由./manage.py runserver 调用的开发服务器工作正常，如上文第二句中所述“......并且工作正常。”
抱歉错过了这一点。堆栈跟踪“redis.Redis(**settings.REDIS)”的这一部分表示它正在尝试使用您应该在 settings.py 中具有的参数打开与 redis 的连接。您的设置文件在生产和开发之间是否不同？
感谢您的意见。设置是一个目录/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/settings 与文件base.py base.pyc docker.py __init__.py __init__.pyc onebox.py postgres.py sqlite.py sqlite.pyc test.py grepping 这些文件为redis 我注意到在onebox 和sqlite 它将代理URL 设置为redis://localhost:6379 所以我在端口而不是套接字上启用redis并重新启动，但问题仍然存在，生成的堆栈跟踪与以前相同。 redis-cli ping 确实回复 PONG

标签： django apache redis self-hosting read-the-docs

【解决方案1】：

好的，现在已经解决了这个问题。不得不补充：

/usr/share/readthedocs/checkouts/readthedocs.org/readthedocs/settings/

到阿帕奇python-path。

和：

REDIS = { 
    'host': 'localhost',
    'port': 6379,
    'db': 0,
}

到设置中的 postgres.py（来自 init.py 的符号链接）

现在对其余缺失的依赖错误进行排序。

【讨论】：