Dockerfile中的alpine安装错误

Question

我试图在Dockerfile中执行以下代码

FROM alpine:3.7
RUN apk update && apk add --no-cache busybox musl prometheus-node-exporter
RUN rc-update add prometheus-node-exporter default
RUN rc-service prometheus-node-exporter start
RUN echo "  - job_name: node \
    # If prometheus-node-exporter is installed, grab stats about the local \
    # machine by default. \
    static_configs: \
      - targets: ['localhost:9100', 'alpine_distro:9100']" >> /etc/prometheus/prometheus.yml

但是，我的构建返回以下错误：

ERROR: 
unsatisfiable constraints:
  prometheus-node-exporter (missing):
    required by: world[prometheus-node-exporter]

The command '/bin/sh -c apk update && apk add --no-cache busybox musl prometheus-node-exporter' returned a non-zero code: 1

我还不习惯阿尔卑斯软件包管理器，但我的猜测是我可能没有使用包含prometheus-node-exporter的回购程序。

还是我漏掉了什么东西？

Answer 1

如果出于某种原因，您被迫使用阿尔卑斯3.7，您可以从高山3.13社区回购安装prometheus-node-exporter包：

$ sudo docker run -it alpine:3.7
/ # apk add prometheus-node-exporter --repository=http://dl-cdn.alpinelinux.org/alpine/v3.13/community
fetch http://dl-cdn.alpinelinux.org/alpine/v3.13/community/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz
(1/1) Installing prometheus-node-exporter (1.0.1-r0)
Executing prometheus-node-exporter-1.0.1-r0.pre-install
 24% ###################################                                                                                                            
Executing busybox-1.27.2-r11.trigger
OK: 20 MiB in 14 packages
/ # 
/ # 
/ # node_exporter --help
usage: node_exporter [<flags>]
...

node_exporter似乎只依赖于musl，因此它很可能在没有特殊问题的情况下很好地工作：

/ # ldd /usr/bin/node_exporter
    /lib/ld-musl-x86_64.so.1 (0x7fea4c68a000)
    libc.musl-x86_64.so.1 => /lib/ld-musl-x86_64.so.1 (0x7fea4c68a000)

但是，如果您有此选项，建议将您的基本高山版本升级到3.13。