今天运行这个命令时报错

docker run -it --name Haproxy --link app1:app1 --link app2:app2 -p 6302:6301 -v ~/Projects/HAProxy:/tmp haproxy /bin/bash 

报错信息：

docker: Error response from daemon: failed to create endpoint Haproxy on network bridge: iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 6302 -j DNAT --to-destination 192.168.0.8:6301 ! -i docker0: iptables: No chain/target/match by that name.

看着信息提示，可以大概知道iptables配置的问题，且跟docker有关。

查看iptables配置文件

cat /etc/sysconfig/iptables (主要是filter和nat的配置)

*filter

:INPUT DROP [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [17:2536]

:syn-flood - [0:0]

-A INPUT -i lo -j ACCEPT

*nat

:PREROUTING ACCEPT [0:0]

:INPUT ACCEPT [0:0]

:OUTPUT ACCEPT [0:0]

:POSTROUTING ACCEPT [0:0]

:OUTPUT_direct - [0:0]

:POSTROUTING_ZONES - [0:0]

:POSTROUTING_ZONES_SOURCE - [0:0]

这里看到filter和nat并没有docker的配置信息，所以添加上对应的信息如下：

*filter

:INPUT DROP [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [17:2536]

:syn-flood - [0:0]

:DOCKER - [0:0]

*nat

:PREROUTING ACCEPT [0:0]

:INPUT ACCEPT [0:0]

:OUTPUT ACCEPT [0:0]

:DOCKER - [0:0]


重启iptables

sudo systemctl restart iptables.service 

重新启动容器即可