ubuntu12.04下docker不能上网的解决办法

disable dnsmasq in NetworkManager (this might slow your network).

1.Open the /etc/NetworkManager/NetworkManager.conf file for editing.

$ sudo gedit /etc/NetworkManager/NetworkManager.conf

2.注销 the dns=dnsmasq line:

#dns=dnsmasq

3.Save and close the file.

4.Restart both the NetworkManager and Docker.

$ sudo restart network-manager
$ sudo restart docker