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docker配置：

root@ubuntu> ps -ef | grep docker
root xxxxx /usr/bin/dockerd -H fd:// -b=br0 --icc=false --iptables=true

先起一個(gè)web主機(jī)：
docker run -d --name web -p 8080:80 php-fpm:5.4

再起一個(gè)test主機(jī)測試連接：
docker run -dit --name test --link web:web blackhole/ubuntu:0.1 bash

查看iptables filter的表：

root@ubuntu> sudo iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy DROP)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain DOCKER (0 references)
target     prot opt source               destination         
ACCEPT     tcp  --  0.0.0.0/0            192.168.100.2        tcp dpt:80
ACCEPT     tcp  --  192.168.100.3        192.168.100.2        tcp dpt:80
ACCEPT     tcp  --  192.168.100.2        192.168.100.3        tcp spt:80
ACCEPT     tcp  --  192.168.100.3        192.168.100.2        tcp dpt:443
ACCEPT     tcp  --  192.168.100.2        192.168.100.3        tcp spt:443
ACCEPT     tcp  --  192.168.100.3        192.168.100.2        tcp dpt:22
ACCEPT     tcp  --  192.168.100.2        192.168.100.3        tcp spt:22

進(jìn)入test容器內(nèi)部：

sudo docker exec -it test bash
root@00585b9efea8:/# cat /etc/hosts
127.0.0.1    localhost
::1    localhost ip6-localhost ip6-loopback
fe00::0    ip6-localnet
ff00::0    ip6-mcastprefix
ff02::1    ip6-allnodes
ff02::2    ip6-allrouters
192.168.100.2    web 2cec3235f5fa
192.168.100.3    00585b9efea8
root@00585b9efea8:/# ping web
PING web (192.168.100.2): 56 data bytes
^C--- web ping statistics ---
12 packets transmitted, 0 packets received, 100% packet loss
root@00585b9efea8:/# ping 192.168.100.2
PING 192.168.100.2 (192.168.100.2): 56 data bytes
^C--- 192.168.100.2 ping statistics ---
12 packets transmitted, 0 packets received, 100% packet loss
root@00585b9efea8:/# curl web
^C
root@00585b9efea8:/# curl http://192.168.100.2:80
^C

指定容器相連的三個(gè)條件：--icc=fasle --iptables=true --link上面都已經(jīng)滿足了。為了防止意外，再第一步之前還執(zhí)行了iptables -F清除

問題出在哪里呢？或者說可能出現(xiàn)在哪里呢