docker 网络不转发

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法一：重建网络docker0

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sudo service docker stop
sudo pkill docker
sudo iptables -t nat -F
sudo ifconfig docker0 down
sudo brctl delbr docker0
sudo service docker start

法二：开启宿主机的ipv4转发功能

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# 修改配置
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf

# 重启network
systemctl restart network

# 查看 (0->标识未开启 1->标识开启)
sysctl net.ipv4.ip_forward
# net.ipv4.ip_forward = 1

# 重启docker
systemctl restart docker