求助！执行docker build时出现的错误！

[orchard2012]

Step 4/16 : RUN ln -s -f /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && curl -fsSL https://setup.ius.io/ | sh && yum update -y && yum install -y python36u python36u-devel python36u-pip && mkdir ~/.pip && echo -e "[global]\nindex-url=http://pypi.douban.com/simple/\ntrusted-host=pypi.douban.com">~/.pip/pip.conf && yum clean all
---> Running in a2f104bc8de5

curl: (6) Could not resolve host: setup.ius.io; Unknown error
Loaded plugins: fastestmirror, ovl
Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"

[CodingCrush]

你的dns有问题吧？我这解析这两个域名没问题呢

[orchard2012]

我也怀疑是dns的问题。但我用的是腾讯云，ping域名和wget都可以啊。