这里是docker构建日志的一个重要部分
#6 [stage-1 2/20] RUN apt-get -y update && apt-get -y upgrade
#6 sha256:6a65c591472319f4cf0c6954f890ee1d5e465b9b12670d78dd15e738cf4bd37d
#6 31.57 Err:1 http://archive.ubuntu.com/ubuntu focal InRelease
#6 31.57 Could not connect to archive.ubuntu.com:80 (91.189.88.142), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.88.152), connection timed out
#6 31.57 Err:2 http://archive.ubuntu.com/ubuntu focal-updates InRelease
#6 31.57 Unable to connect to archive.ubuntu.com:http:
#6 31.57 Err:3 http://archive.ubuntu.com/ubuntu focal-backports InRelease
#6 31.57 Unable to connect to archive.ubuntu.com:http:
#6 32.00 Err:4 http://security.ubuntu.com/ubuntu focal-security InRelease
#6 32.00 Could not connect to security.ubuntu.com:80 (91.189.88.152), connection timed out Could not connect to security.ubuntu.com:80 (91.189.91.39), connection timed out Could not connect to security.ubuntu.com:80 (91.189.88.142), connection timed out Could not connect to security.ubuntu.com:80 (91.189.91.38), connection timed out
#6 32.02 Reading package lists...
#6 32.04 W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal/InRelease Could not connect to archive.ubuntu.com:80 (91.189.88.142), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.88.152), connection timed out
#6 32.04 W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease Unable to connect to archive.ubuntu.com:http:
#6 32.04 W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-backports/InRelease Unable to connect to archive.ubuntu.com:http:
#6 32.04 W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/focal-security/InRelease Could not connect to security.ubuntu.com:80 (91.189.88.152), connection timed out Could not connect to security.ubuntu.com:80 (91.189.91.39), connection timed out Could not connect to security.ubuntu.com:80 (91.189.88.142), connection timed out Could not connect to security.ubuntu.com:80 (91.189.91.38), connection timed out
#6 32.04 W: Some index files failed to download. They have been ignored, or old ones used instead.
#6 32.06 Reading package lists...
#6 32.08 Building dependency tree...
#6 32.08 Reading state information...
#6 32.08 Calculating upgrade...
#6 32.08 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
#6 DONE 32.3s
正如您所看到的，有一些错误，但出于某种原因，docker认为这两个命令都以成功告终：#6 DONE 32.3s。
这损坏了我的Docker缓存，并在构建机器上产生了问题。
问题
现在的问题不是如何修复这个步骤，这是由其他SO问题(其他(所涵盖的。
如何防止此问题并强制apt-get报告错误(无零退出代码(。在我的情况下，问题是暂时的网络问题和这个损坏的docker缓存。我已经清除了cached来解决这个问题，但如何防止这个问题在将来再次发生？
这些不被视为错误，而是警告，正如您可以从行前面的W中看到的那样。
添加以下-o APT::Update::Error-Mode=any可以使apt-get update发生硬故障
POSIX操作系统(linux、unix…(上的任何故障命令都会返回一个代码，0表示成功，其他任何错误都表示错误。
此值存储在"$？"中变量，但您可以直接用|| for或和&；对于和。
apt upgrade || echo "e[31mERROR running APT !e[0m"
e为您提供了各种格式选项颜色、粗体、下划线等。。。https://misc.flogisoft.com/bash/tip_colors_and_formatting