Question

我在CentOS 8上安装了docker。CentOS不再是Docker。当我输入docker build -t project .时，出现以下错误消息：

Err:1 http://deb.debian.org/debian testing InRelease
  Temporary failure resolving 'deb.debian.org'
Err:2 http://http.debian.net/debian sid InRelease
  Temporary failure resolving 'http.debian.net'
Reading package lists...
W: Failed to fetch http://deb.debian.org/debian/dists/testing/InRelease  Temporary failure resolving 'deb.debian.org'
W: Failed to fetch http://http.debian.net/debian/dists/sid/InRelease  Temporary failure resolving 'http.debian.net'
W: Some index files failed to download. They have been ignored, or old ones used instead.
Reading package lists...
E: The value 'testing' is invalid for APT::Default-Release as such a release is not available in the sources
The command '/bin/sh -c apt-get update      && apt-get install -yq --no-install-recommends groff     && rm -rf /var/lib/apt/lists/*' returned a non-zero code: 100

我在/etc/resolv.conf nameserver 8.8.8.8中尝试过

Answer 1

事实上，当您进行docker build时，docker internal将为您设置临时构建容器，因此它仍与容器的dns相关。

默认情况下，docker将使用/etc/resolv.conf文件中本地定义的dns，但如果找不到，则您也可能有机会覆盖它。

您应该创建具有以下内容的下一个文件来设置DNS：

/etc/docker/daemon.json：

{
    "dns": ["your_dns_ip"]
}

最后，重新启动您的泊坞窗以使其生效。详细信息参考Fix Docker's networking DNS config。

另外，请确保使用可行的dns，并确保8.8.8.8确实可以在您所在的国家/地区使用。

在CentOS 8上安装docker

1 个答案: