PySFTP失败，并显示“找不到主机X的主机密钥".部署Django/Heroku时 [英] PySFTP failing with "No hostkey for host X found" when deploying Django/Heroku
问题描述
我正在尝试部署一个Django Web应用程序，该应用程序使用pysftp通过一些视图访问SFTP服务器.
I'm trying to deploy a Django web application which uses pysftp to access to a SFTP server through some views.
在本地开发中，这一切正常进行，但是当尝试在Heroku上进行首次部署时，下面的回溯似乎以错误结束.似乎我需要配置主机密钥，并且我相信还需要在Heroku的known_hosts中设置它们，但是我不知道该怎么做.在本地开发中，我使用用户名/密码访问时没有问题，但是从Heroku中显示了此错误:
The thing was perfectly working in local development, but when trying the first deployment on Heroku, the traceback below appeared ending with an error. It seems like I need to configure host keys and I believe I also need to set them in known_hosts at Heroku, but I have no idea about how to do that. In local development I was accessing with user/password without a problem, but from Heroku this error shows up:
remote: paramiko.ssh_exception.SSHException: No hostkey for host somehost.myftp.org found
您可以在此处查看整个输出:
You can see the whole output here:
remote: -----> Compressing...
remote: Done: 68.8M
remote: -----> Launching...
remote: ! Release command declared: this new release will not be available until the command succeeds.
remote: Released v16
remote: https://somehostonlineproject.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy... done.
remote: Running release command...
remote:
remote: ===============> ParseResult(scheme='', netloc='', path='somehost.sytes.net', params='', query='', fragment='')
remote: /app/.heroku/python/lib/python3.7/site-packages/pysftp/__init__.py:61: UserWarning: Failed to load HostKeys from /app/.ssh/known_hosts. You will need to explicitly load HostKeys (cnopts.hostkeys.load(filename)) or disableHostKey checking (cnopts.hostkeys = None).
remote: warnings.warn(wmsg, UserWarning)
remote: Traceback (most recent call last):
remote: File "manage.py", line 31, in <module>
remote: execute_from_command_line(sys.argv)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
remote: utility.execute()
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute
remote: self.fetch_command(subcommand).run_from_argv(self.argv)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/base.py", line 323, in run_from_argv
remote: self.execute(*args, **cmd_options)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/base.py", line 361, in execute
remote: self.check()
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/base.py", line 390, in check
remote: include_deployment_checks=include_deployment_checks,
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/commands/migrate.py", line 65, in _run_checks
remote: issues.extend(super()._run_checks(**kwargs))
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/base.py", line 377, in _run_checks
remote: return checks.run_checks(**kwargs)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/checks/registry.py", line 72, in run_checks
remote: new_errors = check(app_configs=app_configs)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/checks/urls.py", line 40, in check_url_namespaces_unique
remote: all_namespaces = _load_all_namespaces(resolver)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/core/checks/urls.py", line 57, in _load_all_namespaces
remote: url_patterns = getattr(resolver, 'url_patterns', [])
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/utils/functional.py", line 80, in __get__
remote: res = instance.__dict__[self.name] = self.func(instance)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/urls/resolvers.py", line 584, in url_patterns
remote: patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/utils/functional.py", line 80, in __get__
remote: res = instance.__dict__[self.name] = self.func(instance)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/urls/resolvers.py", line 577, in urlconf_module
remote: return import_module(self.urlconf_name)
remote: File "/app/.heroku/python/lib/python3.7/importlib/__init__.py", line 127, in import_module
remote: return _bootstrap._gcd_import(name[level:], package, level)
remote: File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
remote: File "<frozen importlib._bootstrap>", line 983, in _find_and_load
remote: File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
remote: File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
remote: File "<frozen importlib._bootstrap_external>", line 728, in exec_module
remote: File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
remote: File "/app/config/urls.py", line 27, in <module>
remote: path("browse/", include("django_sftpbrowser.urls", namespace="sftpbrowser-root"), name='browse_option'),
remote: File "/app/.heroku/python/lib/python3.7/site-packages/django/urls/conf.py", line 34, in include
remote: urlconf_module = import_module(urlconf_module)
remote: File "/app/.heroku/python/lib/python3.7/importlib/__init__.py", line 127, in import_module
remote: return _bootstrap._gcd_import(name[level:], package, level)
remote: File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
remote: File "<frozen importlib._bootstrap>", line 983, in _find_and_load
remote: File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
remote: File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
remote: File "<frozen importlib._bootstrap_external>", line 728, in exec_module
remote: File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
remote: File "/app/django_sftpbrowser/urls.py", line 2, in <module>
remote: from .views import browse_page
remote: File "/app/django_sftpbrowser/views.py", line 9, in <module>
remote: srv = pysftp.Connection(settings.SOMEHOST_SFTP_SERVER_URL, username='madtyn', password=settings.SFTP_PASSWORD)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/pysftp/__init__.py", line 132, in __init__
remote: self._tconnect['hostkey'] = self._cnopts.get_hostkey(host)
remote: File "/app/.heroku/python/lib/python3.7/site-packages/pysftp/__init__.py", line 71, in get_hostkey
remote: raise SSHException("No hostkey for host %s found." % host)
remote: paramiko.ssh_exception.SSHException: No hostkey for host somehost.myftp.org found.
remote: Exception ignored in: <function Connection.__del__ at 0x7fd94274b950>
remote: Traceback (most recent call last):
remote: File "/app/.heroku/python/lib/python3.7/site-packages/pysftp/__init__.py", line 1013, in __del__
remote: self.close()
remote: File "/app/.heroku/python/lib/python3.7/site-packages/pysftp/__init__.py", line 784, in close
remote: if self._sftp_live:
remote: AttributeError: 'Connection' object has no attribute '_sftp_live'
remote: Waiting for release... failed.
To https://git.heroku.com/somehostonlineproject.git
* [new branch] deployment -> master
推荐答案
有关找不到主机的主机密钥..."的一般讨论，，请参见:
使用pysftp验证主机密钥
For a general discussion about the "No hostkey for host ... found", see:
Verify host key with pysftp
关于Heroku上的实现:我不熟悉它，但是afaik，正如您也评论过的那样，它没有持久的文件存储.
Regarding the implementation on Heroku: I'm not familiar with it, but afaik, and as you as well commented, it does not have a persistent file storage.
因此，使用具有硬编码的主机密钥的实现是合适的.我对上述问题的回答有两种解决方案，需要:
For this reason, using an implementation that has the host key hard-coded is appropriate. Two solutions from my answer to the above question suit that need:
如果您不想使用外部文件，也可以使用
If you do not want to use an external file, you can also use
from base64 import decodebytes
# ...
keydata = b"""AAAAB3NzaC1yc2EAAAADAQAB..."""
key = paramiko.RSAKey(data=decodebytes(keydata))
cnopts = pysftp.CnOpts()
cnopts.hostkeys.add('example.com', 'ssh-rsa', key)
with pysftp.Connection(host, username, password, cnopts=cnopts) as sftp:
如果仅需要使用指纹来验证主机密钥，请参阅
Python-pysftp/paramiko-使用其指纹验证主机密钥.
If you need to verify the host key using its fingerprint only, see
Python - pysftp / paramiko - Verify host key using its fingerprint.
这也很重要(直接与Paramiko有关，与pysftp包装无关):
Paramiko SSH失败，并显示在known_hosts中找不到服务器'...'"；在网络服务器上运行时
This is also relevant (while about Paramiko directly, not about pysftp wrapper):
Paramiko SSH failing with "Server '...' not found in known_hosts" when run on web server
这篇关于PySFTP失败，并显示“找不到主机X的主机密钥".部署Django/Heroku时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
