Question

我试图运行一个与kafka通信的简单python应用程序。我正在寻找一个高山容器。这是我目前的dockerfile（它不是最优的......只是试着让事情现在起作用）。

FROM python:3.6-alpine
MAINTAINER Ashic Mahtab (ashic@live.com)

RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories
RUN apk update && apk --no-cache add librdkafka


COPY requirements.txt /usr/src/app/
RUN pip install --no-cache-dir -r requirements.txt

COPY api /usr/src/app/api
COPY static /usr/src/app/static

CMD ["python", "api/index.py"]

需求文件中包含了confluent-kafka。构建失败，

OK: 8784 distinct packages available
fetch http://dl-cdn.alpinelinux.org/alpine/v3.4/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.4/community/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz
ERROR: unsatisfiable constraints:
  so:libcrypto.so.41 (missing):
    required by:
                 librdkafka-0.9.4-r1[so:libcrypto.so.41]
                 librdkafka-0.9.4-r1[so:libcrypto.so.41]
                 librdkafka-0.9.4-r1[so:libcrypto.so.41]
  so:libssl.so.43 (missing):
    required by:
                 librdkafka-0.9.4-r1[so:libssl.so.43]
                 librdkafka-0.9.4-r1[so:libssl.so.43]
                 librdkafka-0.9.4-r1[so:libssl.so.43]

我的问题是a）有没有办法让这个工作没有在容器内部构建？如果我可以简单地将图书馆复制到阿尔卑斯山，那就足够了。或者即使我可以复制librdkafka。 b）如果没有，我如何让libssl和libcryto.so工作？

Answer 1

这是一种让它发挥作用的方法：

let newArray = array.filter({ (dictionary) -> Bool in
    if let value = dictionary["photo_id"] as? Int{
        return value != 255024731588044
    }
    return false
})

这里有一个解释：

FROM python:3.6-alpine MAINTAINER Ashic Mahtab (ashic@live.com) RUN mkdir -p /usr/src/app WORKDIR /usr/src/app RUN sed -i -e 's/v3\.4/edge/g' /etc/apk/repositories \ && apk upgrade --update-cache --available \ && apk --no-cache add librdkafka COPY requirements.txt /usr/src/app/ RUN pip install --no-cache-dir -r requirements.txt COPY api /usr/src/app/api COPY static /usr/src/app/static CMD ["python", "api/index.py"]图片基于alpine linux 3.4：Dockerfile

所以你首先需要正确地移动到高山边缘分支：Edge
这是由以下行完成的：

python:3.6-alpine

然后您可以安装RUN sed -i -e 's/v3\.4/edge/g' /etc/apk/repositories \ && apk upgrade --update-cache --available \和依赖项。

Answer 2

我保留了扩展官方ucalgary/python-librdkafka图片的python:3.6-alpine图片，并从其source releases安装librdkafka。欢迎您使用该图像，或者查看Dockerfile以了解它是如何构建的。

Answer 3

因为你无论如何都处于边缘，你也可以从那里使用python3：

% cat Dockerfile 
FROM alpine:edge
MAINTAINER Gerd Flaig <stackoverflow@gerd.flaig.name>

RUN apk update && apk add --no-cache python3 librdkafka && \
    python3 -m ensurepip && \
    rm -r /usr/lib/python*/ensurepip && \
    pip3 install --upgrade pip setuptools && \
    rm -r /root/.cache
% docker build .
Sending build context to Docker daemon  2.048kB
Step 1/3 : FROM alpine:edge
edge: Pulling from library/alpine
71c5a0cc58e4: Pull complete
Digest: sha256:99588bc8883c955c157d18fc3eaa4a3c1400c223e6c7cabca5f600a3e9f8d5cd
Status: Downloaded newer image for alpine:edge
 ---> 8914de95a28d
Step 2/3 : MAINTAINER Gerd Flaig <stackoverflow@gerd.flaig.name>
 ---> Running in 658b056c4e16
 ---> a3b2485fabb0
Removing intermediate container 658b056c4e16
Step 3/3 : RUN apk update && apk add --no-cache python3 librdkafka &&     python3 -m ensurepip &&     rm -r /usr/lib/python*/ensurepip &&     pip3 install --upgrade pip setuptools &&     rm -r /root/.cache
 ---> Running in d7c3f3b30d89
fetch http://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz
v3.5.0-4449-g8922925e5c [http://dl-cdn.alpinelinux.org/alpine/edge/main]
v3.5.0-4450-gb7b4122d6f [http://dl-cdn.alpinelinux.org/alpine/edge/community]
OK: 8348 distinct packages available
fetch http://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz
(1/16) Installing libressl2.5-libcrypto (2.5.3-r1)
(2/16) Installing libgcc (6.3.0-r3)
(3/16) Installing libressl2.5-libssl (2.5.3-r1)
(4/16) Installing libstdc++ (6.3.0-r3)
(5/16) Installing librdkafka (0.9.4-r1)
(6/16) Installing libbz2 (1.0.6-r5)
(7/16) Installing expat (2.2.0-r0)
(8/16) Installing libffi (3.2.1-r3)
(9/16) Installing gdbm (1.12-r0)
(10/16) Installing xz-libs (5.2.3-r0)
(11/16) Installing ncurses-terminfo-base (6.0-r7)
(12/16) Installing ncurses-terminfo (6.0-r7)
(13/16) Installing ncurses-libs (6.0-r7)
(14/16) Installing readline (6.3.008-r5)
(15/16) Installing sqlite-libs (3.18.0-r0)
(16/16) Installing python3 (3.6.1-r1)
Executing busybox-1.26.2-r0.trigger
OK: 75 MiB in 27 packages
Requirement already satisfied: setuptools in /usr/lib/python3.6/site-packages
Requirement already satisfied: pip in /usr/lib/python3.6/site-packages
Requirement already up-to-date: pip in /usr/lib/python3.6/site-packages
Collecting setuptools
  Downloading setuptools-35.0.2-py2.py3-none-any.whl (390kB)
Collecting packaging>=16.8 (from setuptools)
  Downloading packaging-16.8-py2.py3-none-any.whl
Collecting appdirs>=1.4.0 (from setuptools)
  Downloading appdirs-1.4.3-py2.py3-none-any.whl
Collecting six>=1.6.0 (from setuptools)
  Downloading six-1.10.0-py2.py3-none-any.whl
Collecting pyparsing (from packaging>=16.8->setuptools)
  Downloading pyparsing-2.2.0-py2.py3-none-any.whl (56kB)
Installing collected packages: pyparsing, six, packaging, appdirs, setuptools
  Found existing installation: setuptools 28.8.0
    Uninstalling setuptools-28.8.0:
      Successfully uninstalled setuptools-28.8.0
Successfully installed appdirs-1.4.3 packaging-16.8 pyparsing-2.2.0 setuptools-35.0.2 six-1.10.0
 ---> cfb1033ceec0
Removing intermediate container d7c3f3b30d89
Successfully built cfb1033ceec0

在高山容器中使用confluent-kafka python客户端

3 个答案: