Env
Server A: 172.18.27.65 docker0: 172.19.10.1
Server B: 172.18.27.66 docker0: 172.19.20.1
Operation
# In Server A
vim /etc/docker/daemon.json
{ "bip": "172.19.10.1/24" }
systemctl restart docker
ip route add 172.19.20.0/24 via 172.18.27.66
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -F
iptables -L -n
# In Server B
vim /etc/docker/daemon.json
{ "bip": "172.19.20.1/24" }
systemctl restart docker
ip route add 172.19.10.0/24 via 172.18.27.65
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -F
iptables -L -n