在容器化应用之前启动provixy时Docker运行挂起 其他尝试

编程问答 2022-08-11

问题描述

我有一个运行在GKE上的Kubernetes集群中的python FastAPI应用程序。我正在尝试从容器（荚）中获取出站流量，以通过privoxy进行路由。为了测试这一点，我在本地计算机上构建/运行容器，但是当我运行docker run -p 8080:8080 privoxy命令时，得到的输出/日志挂在最后一行：

2020-09-08 13:32:15.342 7fb59e36de80 Info: privoxy version 3.0.26
2020-09-08 13:32:15.342 7fb59e36de80 Info: Program name: privoxy
2020-09-08 13:32:15.344 7fb59e36de80 Info: Loading filter file: /etc/privoxy/default.filter
2020-09-08 13:32:15.345 7fb59e36de80 Info: Loading filter file: /etc/privoxy/user.filter
2020-09-08 13:32:15.345 7fb59e36de80 Info: Loading actions file: /etc/privoxy/match-all.action
2020-09-08 13:32:15.345 7fb59e36de80 Info: Loading actions file: /etc/privoxy/default.action
2020-09-08 13:32:15.348 7fb59e36de80 Info: Loading actions file: /etc/privoxy/user.action
2020-09-08 13:32:15.348 7fb59e36de80 Info: Listening on port 8118 on IP address 0.0.0.0

我的问题是，“如何在运行时启动Docker容器内的privoxy，然后在不使privoxy挂起或引发错误的情况下运行我的应用程序（使用privoxy）？”

我的Dockerfile看起来像这样：

FROM continuumio/miniconda3:4.6.14

# ...

# Install privoxy
RUN set -xe \
    && apt-get update \
    && apt-get install -y privoxy \
    && curl -sSL https://github.com/tianon/gosu/releases/download/1.9/gosu-amd64 > /usr/sbin/gosu \
    && chmod +x /usr/sbin/gosu

RUN sed -i -e '/^listen-address  \[/s/listen-address/#listen-address/' \
           -e '/^enforce-blocks/s/0/1/' \
           -e '/^#debug/s/#//' /etc/privoxy/config
VOLUME /etc/privoxy
EXPOSE 8118

# Install Firefox
RUN apt-get update && \
    apt-get -y install firefox-esr

# Install Geckodriver
RUN wget https://github.com/mozilla/geckodriver/releases/download/v0.24.0/geckodriver-v0.24.0-linux64.tar.gz && \
    tar xzf geckodriver-v0.24.0-linux64.tar.gz && \
    mv geckodriver /usr/bin/geckodriver


# ...

CMD start.sh

start.sh看起来像这样：

#!/usr/bin/env bash
gosu privoxy privoxy --no-daemon /etc/privoxy/config
cd /code
python app.py

当我启动webdriver / Selenium时，我使用以下功能：

from selenium import webdriver
from selenium.webdriver.firefox.options import Options as FFOptions
from selenium.webdriver.firefox.webdriver import WebDriver as FirefoxWebDriver

def get_container_firefox_driver(windows_mask: bool=True):
    # create a new FireFox session
    os.environ['MOZ_FORCE_disABLE_E10S'] = '1'

    ff_options = FFOptions()
    ff_options.add_argument('-new-instance')
    ff_options.add_argument('-headless')

    ff_profile = webdriver.FirefoxProfile()
    # set some privacy settings
    ff_profile.set_preference("places.history.enabled",False)
    ff_profile.set_preference("privacy.clearOnShutdown.offlineApps",True)
    ff_profile.set_preference("privacy.clearOnShutdown.passwords",True)
    ff_profile.set_preference("privacy.clearOnShutdown.siteSettings",True)
    ff_profile.set_preference("privacy.sanitize.sanitizeOnShutdown",True)
    ff_profile.set_preference("signon.rememberSignons",False)
    ff_profile.set_preference("network.cookie.lifetimePolicy",2)
    ff_profile.set_preference("network.dns.disablePrefetch",True)
    ff_profile.set_preference("network.http.sendRefererHeader",0)

    # set socks proxy
    ff_profile.set_preference("network.proxy.type",1)
    ff_profile.set_preference("network.proxy.socks_version",5)
    ff_profile.set_preference("network.proxy.socks",'127.0.0.1')
    ff_profile.set_preference("network.proxy.socks_port",8118)
    ff_profile.set_preference("network.proxy.socks_remote_dns",True)

    # get a speed increase by not downloading images
    ff_profile.set_preference("permissions.default.image",2)

    driver = webdriver.Firefox(
        firefox_profile=ff_profile,options=ff_options,executable_path="/usr/bin/geckodriver",)
    return driver

其他尝试

我还尝试通过在Dockerfile中使用以下listen-address [::1]:8118命令来注释掉privoxy配置文件的sed行：

RUN sed -i -e '/^enforce-blocks/s/0/1/' \
           -e '/^#debug/s/#//' /etc/privoxy/config

...但是当我这样做时，当在容器中启动privoxy时，出现以下“致命错误”：

2020-09-08 14:21:16.844 7fa4d8646e80 Info: privoxy version 3.0.26
2020-09-08 14:21:16.844 7fa4d8646e80 Info: Program name: privoxy
2020-09-08 14:21:16.845 7fa4d8646e80 Info: Loading filter file: /etc/privoxy/default.filter
2020-09-08 14:21:16.847 7fa4d8646e80 Info: Loading filter file: /etc/privoxy/user.filter
2020-09-08 14:21:16.847 7fa4d8646e80 Info: Loading actions file: /etc/privoxy/match-all.action
2020-09-08 14:21:16.847 7fa4d8646e80 Info: Loading actions file: /etc/privoxy/default.action
2020-09-08 14:21:16.849 7fa4d8646e80 Info: Loading actions file: /etc/privoxy/user.action
2020-09-08 14:21:16.850 7fa4d8646e80 Info: Listening on port 8118 on IP address 127.0.0.1
2020-09-08 14:21:16.850 7fa4d8646e80 Fatal error: can't bind to ::1:8118: Cannot assign requested address

解决方法

基于所使用的操作系统，privoxy的启动命令不正确。对于Debian Linux操作系统，每个privoxy startup manual的启动命令应为/etc/init.d/privoxy start --no-daemon。另外，此命令之前的gosu命令不是必需的，它会使privoxy启动崩溃。 start.sh应该如下所示：

#!/usr/bin/env bash
/etc/init.d/privoxy start --no-daemon
cd /code
python app.py

用listen-address [::1]:8118注释RUN sed -i -e '/^listen-address \[/s/listen-address/#listen-address/ ...行可以防止在privoxy启动期间出现致命错误，因此应使用它。

dockerdockerdockerfiledockerfileprivoxypythonselenium-firefoxdriver