生成Docker映像在一台计算机上成功，但在另一台计算机上失败，原因是“无法解析…”`

我使用以下命令构建Docker映像：

docker build -t my-tag:0.0.0 -f Dockerfile-staging .

在我的机器上（泰国的MBP），它可以工作。 在我的同事的机器（Ubuntu，中国）上，它出现以下错误：

Step 3/9 : RUN apt-get update &&     apt-get upgrade -y &&     apt-get install -y gcc &&     apt-get install -y git &&     apt-get install -y libcurl4 &&     apt-get install -y libpq-dev &&     apt-get install -y libssl-dev &&     apt-get install -y python3-dev &&     apt-get install -y librtmp-dev &&     apt-get install -y libcurl4-gnutls-dev &&     apt-get install -y libcurl4-openssl-dev &&     apt-get install -y postgresql-9.3 &&     apt-get install -y python-psycopg2
 ---> Running in f405a317507e
Err:1 http://deb.debian.org/debian buster InRelease
  Could not resolve 'debian.map.fastlydns.net' Could not resolve 'deb.debian.org'
Err:2 http://security.debian.org/debian-security buster/updates InRelease
  Could not resolve 'debian.map.fastlydns.net' Could not resolve 'security.debian.org'
Err:3 http://deb.debian.org/debian buster-updates InRelease
  Could not resolve 'debian.map.fastlydns.net' Could not resolve 'deb.debian.org'
Reading package lists...
W: Failed to fetch http://deb.debian.org/debian/dists/buster/InRelease  Could not resolve 'debian.map.fastlydns.net' Could not resolve 'deb.debian.org'
W: Failed to fetch http://security.debian.org/debian-security/dists/buster/updates/InRelease  Could not resolve 'debian.map.fastlydns.net' Could not resolve 'security.debian.org'
W: Failed to fetch http://deb.debian.org/debian/dists/buster-updates/InRelease  Could not resolve 'debian.map.fastlydns.net' Could not resolve 'deb.debian.org'
W: Some index files failed to download. They have been ignored, or old ones used instead.

---

为什么会这样？如何修复？

另一台机器上的DNS查找失败。对Debian网站执行

nslookup

，如

nslookup security.Debian.org

，将有助于隔离问题。此外，您可以在其工作的机器上尝试

——无缓存

——它可能使用以前版本的本地缓存