Question

将Docker升级到 Docker版本18.09.2，在Ubuntu 18.04.2 LTS上构建6247962 后，容器内的DNS配置始终仅指向Google的DNS服务器。以前，容器中的/etc/resolv.conf文件将包含主机的DNS配置。

文件/etc/resolv.conf现在看起来像这样：

$ sudo docker run -it centos:6 bash
[root@459f5102cc74 /]# cat /etc/resolv.conf  
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients directly to
# all known uplink DNS servers. This file lists all configured search domains.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

# No DNS servers known.

nameserver 8.8.8.8
nameserver 8.8.4.4
[root@459f5102cc74 /]#

到目前为止，我发现的唯一解决方法是在/etc/docker/daemon.json中手动配置DNS：

$ cat /etc/docker/daemon.json 
{
  "dns": ["10.0.0.1"],
  "dns-search": ["example.org"]
}

重新启动Docker守护程序后，我看到：

$ sudo docker run -it centos:6 bash
[root@d1049c2c3d96 /]# cat /etc/resolv.conf 
search example.org
nameserver 10.0.0.1

有没有办法让Docker自动获取主机的DNS配置？

（PS主机是静态配置的，即它没有使用DHCP。）

升级后，Docker无法接收主机DNS配置

0 个答案: