解决步骤：
1、查看iptables状态，查看是否正常docker需要依赖该服务
service iptables status
注：我都服务就发现iptables服务的有问题
2、查看iptables规则是否生效
iptables -L
3、检查iptables文件中是否有docker项目
nat :PREROUTING ACCEPT [27:11935] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [598:57368] :POSTROUTING ACCEPT [591:57092] :DOCKER - [0:0] -A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER -A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER -A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE COMMIT # Completed on Sun Sep 20 17:35:31 2015 # Generated by iptables-save v1.4.21 on Sun Sep 20 17:35:31 2015 *filter :INPUT ACCEPT [139291:461018923] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [127386:5251162] :DOCKER - [0:0] -A FORWARD -o docker0 -j DOCKER -A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A FORWARD -i docker0 ! -o docker0 -j ACCEPT -A FORWARD -i docker0 -o docker0 -j ACCEPT COMMIT # Completed on Sun Sep 20 17:35:31 2015
filter表和nat表中所有docker项都要加进去
生效后的iptables -nL
[root@localhost ~]# iptables -nL Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:9505 Chain FORWARD (policy ACCEPT) target prot opt source destination DOCKER all -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain DOCKER (1 references) target prot opt source destination ACCEPT tcp -- 0.0.0.0/0 172.17.0.2 tcp dpt:27017