docker - Docker构建失败: “unsatisfable contraints”

Question

我已经写了这个简单的Dockerfile:

FROM alpine

WORKDIR /usr/src

RUN apk add --no-cache curl jq
RUN mkdir /env

COPY src/* /usr/src/
RUN chmod u+x /usr/src/*.sh

CMD /usr/src/wsec.sh

当我尝试生成图像时，出现以下错误消息:

Sending build context to Docker daemon  43.52kB
Step 1 : FROM alpine
 ---> 3fd9065eaf02
Step 2 : WORKDIR /usr/src
 ---> Using cache
 ---> 4c7b79dc4239
Step 3 : RUN apk add --no-cache curl jq
 ---> Running in 0cf83217477a
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz: temporary error (try again later)
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz: temporary error (try again later)
ERROR: unsatisfiable constraints:
  curl (missing):
    required by: world[curl]
  jq (missing):
    required by: world[jq]
The command '/bin/sh -c apk add --no-cache curl jq' returned a non-zero code: 2

Answer 1

主 Alpine 存储库http://dl-cdn.alpinelinux.org/alpine可能暂时不可用。就像您的情况一样。为了不受此问题的影响，我们应在我们的 Alpine 图像中添加其他 Alpine 存储库:

http://dl-2.alpinelinux.org
http://dl-3.alpinelinux.org
http://dl-4.alpinelinux.org
http://dl-5.alpinelinux.org

因此，最终的 Dockerfile是:

FROM alpine

WORKDIR /usr/src

RUN echo "http://dl-2.alpinelinux.org/alpine/v3.7/main" >> /etc/apk/repositories      && \ 
    echo "http://dl-2.alpinelinux.org/alpine/v3.7/community" >> /etc/apk/repositories && \
    echo "http://dl-3.alpinelinux.org/alpine/v3.7/main" >> /etc/apk/repositories      && \
    echo "http://dl-3.alpinelinux.org/alpine/v3.7/community" >> /etc/apk/repositories && \
    echo "http://dl-4.alpinelinux.org/alpine/v3.7/main" >> /etc/apk/repositories      && \
    echo "http://dl-4.alpinelinux.org/alpine/v3.7/community" >> /etc/apk/repositories && \
    echo "http://dl-5.alpinelinux.org/alpine/v3.7/main" >> /etc/apk/repositories      && \
    echo "http://dl-5.alpinelinux.org/alpine/v3.7/community" >> /etc/apk/repositories 

RUN apk add --no-cache curl jq

RUN mkdir /env

COPY src/* /usr/src/
RUN chmod u+x /usr/src/*.sh

CMD /usr/src/wsec.sh