video on demand1. List the docker network.
# docker network ls
NETWORK ID NAME DRIVER SCOPE
82f0e82e8a52 bridge bridge local
2f29f6c3dc07 host host local
0ee77fd0eaf6 none null local
2. List the bridge's address.
# ifconfig docker0 | grep "inet "
inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0
3. Create two containers.
# docker run -d -it --name=container1 net/centos
# docker run -d -it --name=container2 net/centos
4. List the address of container1.
# docker exec container1 ifconfig eth0 | grep "inet "
inet 172.17.0.2 netmask 255.255.0.0 broadcast 0.0.0.0
5. Create a new network.
# docker network create -d bridge --subnet 172.25.0.0/16 \ isolated_nw
6. Connect container2 to the new network.
# docker network connect isolated_nw container2
7. List the addresses of container2.
# docker exec container2 ifconfig | grep "inet "
inet 172.17.0.3 netmask 255.255.0.0 broadcast 0.0.0.0
inet 172.25.0.2 netmask 255.255.0.0 broadcast 0.0.0.0
inet 127.0.0.1 netmask 255.0.0.0
8. Create a third container and connect it to the new network.
# docker run --network=isolated_nw --ip=172.25.3.3 -itd \ --name=container3 net/centos
9. Check connectivity from container2 to container3.
# docker exec container2 ping -w 1 172.25.3.3
PING 172.25.3.3 (172.25.3.3) 56(84) bytes of data.
64 bytes from 172.25.3.3: icmp_seq=1 ttl=64 time=0.088 ms
64 bytes from 172.25.3.3: icmp_seq=2 ttl=64 time=0.072 ms
10 Check connectivity from container3 to container1.
# docker exec container3 ping -w 1 172.17.0.2
PING 172.17.0.2 (172.17.0.2) 56(84) bytes of data.
--- 172.17.0.2 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 999ms
11. Clean up.
# docker rm -f container1 container2 container3
container1
container2
container3
# docker network rm isolated_nw
isolated_nw