docker之常见错误

1.

docker run -d --name showdoc -p 4999:80 -v /showdoc_data/html:/var/www/html/      star7th/showdoc
WARNING: IPv4 forwarding is disabled. Networking will not work.
58fc7aa9da0886e66d73e40bf8927aa6b4857e60189d9a24270a89820a4e2427
docker: Error response from daemon: driver failed programming external connectivity on endpoint showdoc (1f2e6e122a573af17586c5f112951b8d82f2f037e09aebce298170f79e18e231):  (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 4999 -j DNAT --to-destination 172.17.0.2:80 ! -i docker0: iptables: No chain/target/match by that name.
 (exit status 1)).

解决：

systemctl restart docker
docker start 58fc

2. 执行docker search mongo 报错

　　Error response from daemon: Get https://index.docker.io/v1/search?q=mongo&n=25: Service Unavailable

　　解决：

# 修改域名解析配置
vim  /etc/resolv.conf

# 清空配置并添加
nameserver 8.8.8.8
nameserver 8.8.8.4

# 重启网络服务
systemctl restart network