内核目前版本

gnuhealth@localhost:~ $ uname -r 

3.11.6

docker已经启动

运行 docker info

gnuhealth@localhost:~ $ sudo docker info 
[sudo] password for gnuhealth: 
FATA[0000] Cannot connect to the Docker daemon. Is 'docker -d' running on this host? 

运行 docker -d

gnuhealth@localhost:~ $ sudo docker -d
INFO[0000] +job serveapi(unix:///var/run/docker.sock)   
INFO[0000] +job init_networkdriver()                    
INFO[0000] Listening for HTTP on unix (/var/run/docker.sock) 
Unable to enable network bridge NAT: iptables failed: iptables --wait -I POSTROUTING -t nat -s 172.17.42.1/16 ! -o docker0 -j MASQUERADE: iptables v1.4.21: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
 (exit status 3)
INFO[0000] -job init_networkdriver() = ERR (1)          
FATA[0000]  (exit status 3) 

iptables的版本也升级过，目前版本为

gnuhealth@localhost:~ $ iptables -V
iptables v1.4.21

运行iptables -t net -L

gnuhealth@localhost:~ $ sudo iptables -t net -L
iptables v1.4.21: can't initialize iptables table `net': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.