$ docker ps -q | \
xargs docker inspect --format='{{.NetworkSettings.IPAddress}}' | \
xargs -l1 ping -c1
PING 172.17.0.5 (172.17.0.5) 56(84) bytes of data.
64 bytes from 172.17.0.5: icmp_seq=1 ttl=64 time=0.095 ms

--- 172.17.0.5 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.095/0.095/0.095/0.000 ms
