解决docker 容器内访问宿主机“No route to host”的问题
请顺序运行以下命令：
1 nmcli connection modify docker0 connection.zone trusted
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3 systemctl stop NetworkManager.service
4 firewall-cmd --permanent --zone=trusted --change-interface=docker0
5 systemctl start NetworkManager.service
6 nmcli connection modify docker0 connection.zone trusted
7 systemctl restart docker.service
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