[英]FileNotFoundError Python-Flask/Docker in Kubernetes Cluster
我在 Flask 應用程序中打開文件時遇到問題,在 Kubernetes 集群的 Docker 容器中運行。
每當我嘗試打開文件 i 目錄時,我都會收到FileNotFoundError
。 S3FS 對象存儲已配置,並且 PersistentVolumeclaim 已成功掛載到我的 pod,因此沒有問題。
但是,當嘗試從已安裝的存儲中讀取文件時,出現上述錯誤。 這是我讀取文件的方式。 current_dir
是/var/www
current_dir = os.path.dirname(__file__)
abs_path = os.path.join(current_dir, path)
with open(abs_path, "rb") as file:
bin_data = file.read()
此外,我還嘗試了以下所有變體,但似乎都不起作用:
data_path = pathlib.Path('/var/www/uploads/')
abs_path = data_path / path_id
data_path = pathlib.Path('uploads/')
abs_path = data_path / path_id
abs_path = current_dir + '/uploads' + path_id
tmp = str('/uploads/' + path_id).split('/')
abs_path = os.path.join(os.path.dirname(__file__), *tmp)
我得到的錯誤如下:
[2020-04-02 18:16:49,359] ERROR in app: Exception on /internal/tusd [POST]
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.7/site-packages/flask_cors/extension.py", line 161, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1820, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1935, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/var/www/api_controller.py", line 95, in tusd_handler
hexdigest = hash_file(str(upload_id), hash_type)
File "/var/www/file_hasher.py", line 17, in hash_file
with open(abs_path, "rb") as file:
FileNotFoundError: [Errno 2] No such file or directory: '/var/www/uploads/f7f1c686fbc40649879e8aee7f529c96'
但是,當我exec -it
進入容器時。 該文件等存在。
$ kubectl exec hasher-savoury-695669b858-nwg5j -- ls /var/www/uploads
f7f1c686fbc40649879e8aee7f529c96
f7f1c686fbc40649879e8aee7f529c96.info
這是我一直在使用的 Dockerfile。 注釋字段是我為了讓它工作而嘗試的選項。
FROM python:3.7-alpine as base
ENV GROUP_ID=1000 \
USER_ID=1000
RUN apk upgrade && apk update \
&& apk --no-cache add openssl-dev openssl
RUN apk --no-cache --update add --virtual build-dependencies gcc g++ make libffi-dev
RUN mkdir /var/www && mkdir /var/www/uploads
COPY . /var/www
WORKDIR /var/www
RUN pip install --upgrade pip && pip install -r requirements.txt && apk del build-dependencies
RUN pip install gunicorn
#RUN addgroup -g $GROUP_ID savoury
#RUN adduser -D -u $USER_ID -G savoury savoury -s /bin/sh \
# && chown savoury:savoury -R var/www/
#USER savoury
EXPOSE 5080
ENTRYPOINT ["gunicorn"]
CMD ["-w", "4", "--bind", "0.0.0.0:5080", "wsgi"]
我曾嘗試用 Java 讀取這些文件並成功讀取它們。 我還嘗試“執行”到容器中,並且能夠在 python 控制台中輕松執行此操作。 我不知道為什么上面的腳本不起作用。
任何幫助是極大的贊賞!
錯誤背后的原因實際上是找不到文件。 由於上傳服務器的異步事件計時不當,它在讀取期間不存在。 由於記錄不佳,該故障未被發現。 教訓:始終記錄和監視。
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