How to configure nginx config?

Hi, I have a docker container running with:

FROM tiangolo/uwsgi-nginx-flask:python3.6
COPY requirements.txt /tmp/
RUN pip install -U pip
RUN pip install -r /tmp/requirements.txt
COPY ./app /app

When running (it runs flawless except for this), there is a particular action that causes the server to crash with the following message:

2018/10/02 13:06:43 [error] 10#10: *9 upstream sent too big header while reading response header from upstream

I’m aware that the problem is with the nginx.config file and that it is located in /etc/nginx/conf.d/nginx.conf. More particularly, I have to add the answer here to the file. Because the request header is too large.

I have tried to modify that file while building the docker image, but haven’t figured out exactly how to do it.

Here is my project tree:

├── Dockerfile
├── app
│   ├── config.py
│   ├── data
│   │   └── users.json
│   ├── forms.py
│   ├── main.py
│   ├── static
│   │   ├── ajax-loader.gif
│   │   └── logo.png
│   ├── templates
│   │   ├── 404.html
│   │   ├── 500.html
│   │   ├── base.html
│   │   └── upload.html
│   └── utils.py
└── requirements.txt

How exactly should I proceed?

Sorry for the question, appreciate any help and this awesome image!

[tiangolo]

Let’s say you create a file buffer-size.conf:

uwsgi_buffer_size 24k;

that file is right beside your Dockerfile, that now has an additional line:

COPY ./buffer-size.conf /etc/nginx/conf.d/

…so your final Dockerfile might look like:

FROM tiangolo/uwsgi-nginx-flask:python3.6

COPY ./buffer-size.conf /etc/nginx/conf.d/

COPY requirements.txt /tmp/
RUN pip install -U pip
RUN pip install -r /tmp/requirements.txt
COPY ./app /app

[tiangolo]

I guess the original issue of this thread was solved too, so I’ll close it.

But feel free to add more comments or open new issues.