由于高山错误，docker无法构建

Question

您好，我正在尝试构建一个 docker，Docker 文件看起来像这样。

FROM alpine

LABEL description "Nginx + uWSGI + Flask based on Alpine Linux and managed by Supervisord"

# Copy python requirements file
COPY requirements.txt /tmp/requirements.txt

RUN apk add --no-cache \
    python3 \
    bash \
    nginx \
    uwsgi \
    uwsgi-python3 \
    supervisor && \
    python3 -m ensurepip && \
    rm -r /usr/lib/python*/ensurepip && \
    pip3 install --upgrade pip setuptools && \
    pip3 install -r /tmp/requirements.txt && \
    rm /etc/nginx/conf.d/default.conf && \
    rm -r /root/.cache

# Copy the Nginx global conf
COPY nginx.conf /etc/nginx/
# Copy the Flask Nginx site conf
COPY flask-site-nginx.conf /etc/nginx/conf.d/
# Copy the base uWSGI ini file to enable default dynamic uwsgi process number
COPY uwsgi.ini /etc/uwsgi/
# Custom Supervisord config
COPY supervisord.conf /etc/supervisord.conf

# Add demo app
COPY ./app /app
WORKDIR /app

CMD ["/usr/bin/supervisord"]

错误看起来像

Sending build context to Docker daemon  250.9kB
Step 1/11 : FROM alpine
 ---> 196d12cf6ab1
Step 2/11 : LABEL description "Nginx + uWSGI + Flask based on Alpine Linux and managed by Supervisord"
 ---> Using cache
 ---> d8d38c761b8d
Step 3/11 : COPY requirements.txt /tmp/requirements.txt
 ---> Using cache
 ---> cb29eb34ca46
Step 4/11 : RUN apk add --no-cache     python3     bash     nginx     uwsgi     uwsgi-python3     supervisor &&     python3 -m ensurepip &&     rm -r /usr/lib/python*/ensurepip &&     pip3 install --upgrade pip setuptools &&     pip3 install -r /tmp/requirements.txt &&     rm /etc/nginx/conf.d/default.conf &&     rm -r /root/.cache
 ---> Running in 3d568d2620dd
fetch http://dl-cdn.alpinelinux.org/alpine/v3.8/main/x86_64/APKINDEX.tar.gz
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.8/main/x86_64/APKINDEX.tar.gz: could not connect to server (check repositories file)
fetch http://dl-cdn.alpinelinux.org/alpine/v3.8/community/x86_64/APKINDEX.tar.gz
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.8/community/x86_64/APKINDEX.tar.gz: could not connect to server (check repositories file)
ERROR: unsatisfiable constraints:
  bash (missing):
    required by: world[bash]
  nginx (missing):
    required by: world[nginx]
  python3 (missing):
    required by: world[python3]
  supervisor (missing):
    required by: world[supervisor]
  uwsgi (missing):
    required by: world[uwsgi]
  uwsgi-python3 (missing):
    required by: world[uwsgi-python3]
The command '/bin/sh -c apk add --no-cache     python3     bash     nginx     uwsgi     uwsgi-python3     supervisor &&     python3 -m ensurepip &&     rm -r /usr/lib/python*/ensurepip &&     pip3 install --upgrade pip setuptools &&     pip3 install -r /tmp/requirements.txt &&     rm /etc/nginx/conf.d/default.conf &&     rm -r /root/.cache' returned a non-zero code: 6

一个月前它还不错。由于对 Docker 的了解有限，我无法弄清楚导致错误的原因。快速谷歌搜索得到了这两个链接：link1link2 但它们都没有工作。

Answer 1

使用标志“--network host”构建 docker 解决了这个问题。这是link。

Answer 2

行：

WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.8/main/x86_64/APKINDEX.tar.gz: could not connect to server (check repositories file)

基本上说你要么离线，要么 alpinelinux repo 已关闭。我在互联网上找不到任何关于它的信息，但过去发生过几次。或者它可能是您和 CDN 之间某处的网络问题。

您可以随时从http://dl-cdn.alpinelinux.org/alpine/MIRRORS.txt 中选择自己的镜像并进行如下设置：

RUN echo http://repository.fit.cvut.cz/mirrors/alpine/v3.8/main > /etc/apk/repositories; \
    echo http://repository.fit.cvut.cz/mirrors/alpine/v3.8/community >> /etc/apk/repositories

（根据你的版本更改v3.8）

---

正如@emix 所指出的，你永远不应该使用:latest 标签作为你的基础镜像。使用例如3.8，或者你需要的包版本。

Answer 3

另一个修复 -

我将8.8.8.8 添加到我的/etc/resolv.conf 并重新启动了docker 守护进程。它为我解决了这个问题。

Answer 4

这种错误通常是由于某些网络问题而发生的。

尝试使用 https 镜像而不是 http。

RUN sed -i -e 's/http:/https:/' /etc/apk/repositories

Answer 5

如果您能够手动下载文件，请尝试重新启动您的 docker 服务。它对我有用..

Answer 6

为标题提供更通用的故障排除答案。在另一个容器中测试您的 docker 命令。这可能是另一个您不介意破坏的正在运行的容器，或者最好是一个基本容器（在本例中为 alpine），您可以在其中在 shell 上运行 Dockerfile 命令。可能不是原始问题中网络问题的解决方案，但在其他情况下很好。

apk 错误消息并不总是最有用的。看看下面的例子：

/ # apk add --no-cache influxdb-client
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz
ERROR: unsatisfiable constraints:
  influxdb-client (missing):
    required by: world[influxdb-client]
/ # 
/ # 
/ # 
/ # 
/ # apk add --no-cache influxdb
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz
(1/1) Installing influxdb (1.8.0-r1)
Executing influxdb-1.8.0-r1.pre-install
Executing busybox-1.31.1-r19.trigger
OK: 613 MiB in 98 packages

顺便说一句，https://pkgs.alpinelinux.org/packages 是查找 Alpine 软件包名称的好地方，这将修复上述示例。