Docker Containers cannot access internet and each other with skydock

[danieltan]

Hi Michael,

I'm trying to use Skydock to allow my containers to know which container is communicating to them by hostname. Specifically, I want to set up datadog monitoring on my containers, and want to allow access to status services on the container via a host name (rather than an IP address for instance).

I've followed your install instructions, but once I start up my containers, I notice that they do not have access to the Internet, even though skydns's -namesever has been set to 8.8.8.8:53.

I also cant seem to ping my other containers from within a container using your URL scheme
SkyDNS logs show that it picks up that the containers have been run

My environment is Ubuntu 14.04 and Docker version is 1.4.1

Any thoughts?

Thanks,
Dan

[simonqbs]

I had the same problem and for me it was fw related. Since you are running ubuntu you probably have ufw installed so try running ufw allow from 172.17.0.0/16 to any.