Docker容器总是显示ssl连接错误

我正在开始使用 docker compose，并一直在研究简单的演示 Flask 应用程序。问题是，我在一个组织内部运行这个程序，该组织以左右抛出 SSL 错误的方式拦截所有通信。他们为我们提供了需要安装的三个根证书，我通常已经让这些证书在我自己的机器上工作，但是当涉及到让这些证书在 docker-compose 部署中工作时我迷失了。

当我运行 docker-compose up 时，我得到以下信息：

$ sudo docker-compose up 
Creating network "project_default" with the default driver
Building web
Step 1/5 : FROM python:3.4-alpine
3.4-alpine: Pulling from library/python
81033e7c1d6a: Pull complete
9b61101706a6: Pull complete
415e2a07c89b: Pull complete
f22df7a3f000: Pull complete
8c16bf19c1f9: Pull complete
Digest: sha256:fe436cb066394d81cf49448a04dec7c765082445a500bc44f1ae5e8a455793bd
Status: Downloaded newer image for python:3.4-alpine
 ---> 5c72717ec319
Step 2/5 : ADD . /code
 ---> a5790c0e3e94
Removing intermediate container 052c614e41d0
Step 3/5 : WORKDIR /code
 ---> a2ea9acb3005
Removing intermediate container 77f2375ca0a6
Step 4/5 : RUN pip install -r requirements.txt
 ---> Running in 5f4fe856776d
Collecting flask (from -r requirements.txt (line 1))
  Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fb0061f1d30>: Failed to establish a new connection: [Errno -3] Try again',)': /simple/flask/
  Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fb0061f19b0>: Failed to establish a new connection: [Errno -3] Try again',)': /simple/flask/
  Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fb0061f1828>: Failed to establish a new connection: [Errno -3] Try again',)': /simple/flask/
  Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fb0061f1588>: Failed to establish a new connection: [Errno -3] Try again',)': /simple/flask/
  Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fb0061f1390>: Failed to establish a new connection: [Errno -3] Try again',)': /simple/flask/
  Could not find a version that satisfies the requirement flask (from -r requirements.txt (line 1)) (from versions: )
No matching distribution found for flask (from -r requirements.txt (line 1))

Pip 无法安装任何东西。

docker-compose.yml 文件如下所示：

version: '3'
services:
  web:
    build: .
    ports:
     - "5000:5000"
  redis:
    image: "redis:alpine"

主 Dockerfile 如下所示：

FROM python:3.4-alpine
ADD . /code
WORKDIR /code
RUN pip install -r requirements.txt
CMD ["python", "app.py"]

在这种特殊情况下有什么办法可以使这项工作有效吗？是否有针对此类问题的通用解决方案，允许我将 SSL 证书传递给部署了 SSL 证书的任何容器并使用它们？

这实际上并不是一个特定于 docker 的问题：实际上，您是在问“如何在 Linux 下安装证书颁发机构”？无论您是在容器内部还是外部运行 ssl 客户端，答案都是相同的。

您的Python镜像基于alpine，alpine使用“ca-certificates”包来管理CA证书。要安装本地 CA 证书，您需要 (a) 将它们复制到/usr/share/ca-certificates目录和 (b) 运行update-ca-certificates.

例如，将类似的内容添加到您的 Dockerfile 中（在您的pip install):

COPY company-ca.crt /usr/share/ca-certificates
RUN update-ca-certificates