CentOS - Jan 2018 - Restarting docker daemon fixes network problem inside containers

Hi,

We are building docker containers on Centos 7 based machines. Sometimes the
docker being built cannot install packages because of some kind of network
failure. I just found that restarting the docker container fixes the
problems and the builds are successful.

Does anyone have a clue what the root cause of this might be?

Ta,

Andrew

On 30/01/2018 09:54, Andrew Holway wrote:
> Does anyone have a clue what the root cause of this might be?
I've had trouble before when settings in /etc/sysctl.d were disabling
ip_forwarding, which will break Docker's networking in some configurations.

You may also want to check firewall rules if you have some configuration
management tool controlling them.