RTNETLINK answers: Network is unreachable,
A simple restart of the container fixes all my problems and pihole starts functioning well. The problem happens after a host system reboot. What can i do to fix this ?
I think because your docker container is started up before your system is completely online you need to add a delay before docker's service (or just my container) starts. This gives time for your networking to finish it's startup process and then the IP check shouldn't fail with that network unreachable error.