CentOS 7、 8 中，Docker采用bridge網(wǎng)絡(luò)的Container無法連接外網(wǎng)的問題
原因：系統(tǒng)默認采用firewelld管理防火墻規(guī)則參考：https://github.com/firewalld/firewalld/issues/195

[woods@localhost ~]$  nmcli connection modify docker0 connection.zone trusted
[woods@localhost ~]$ systemctl stop NetworkManager.service
[woods@localhost ~]$ firewall-cmd --permanent --zone=trusted --change-interface=docker0
success
[woods@localhost ~]$ systemctl start NetworkManager.service
[woods@localhost ~]$ nmcli connection modify docker0 connection.zone trusted
[woods@localhost ~]$ systemctl restart docker.service
[woods@localhost ~]$ firewall-cmd --get-active-zone
libvirt
  interfaces: virbr0
public
  interfaces: ens37
trusted
  interfaces: docker0