Four Network models of Docker
1. NAT (default) NAT network model, which is NAT mode by default For example, the port mapping of a network is in Nat II, None (no network) format: docker run-- net=none [root@docker ~] # docker run-- rm-ti-- net=none centos:centos7 III. Host (same IP as host) format: docker run-- net=host [root@docker ~] # docker run-- rm-ti-- net=Host centos:centos7 [root@docker /] # ifconfigdocker0: flags=4099 mtu 1500 inet 172.7.5.1 netmask 255.255.255.0 broadcast 172.7.5.255 inet6 fe80::42:28ff:fe56:8b6 prefixlen 64 scopeid 0x20 ether 02:42:28:56:08:b6 txqueuelen 0 (Ethernet) RX Packets 135990 bytes 9017234 (8.5 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 158771 bytes 317188403 (302.4 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0ens192: flags=4163 mtu 1500 inet 10.3.153.120 netmask 255.255.255.0 broadcast 10.3.153.255 inet6 fe80::36aa:b367:aa13:b475 prefixlen 64 scopeid 0x20 ether 00:50:56:9b:00:06 txqueuelen 1000 ( Ethernet) RX packets 747539 bytes 528246025 (503.7 MiB) RX errors 0 dropped 1227 overruns 0 frame 0 TX packets 249250 bytes 38867074 (MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6:: 1 prefixlen 128 scopeid 0x10 loop txqueuelen 1 (Local Loopback) RX packets 0 bytes 0 (0.0B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0. Federated network (i.e. two containers share an IP address) the first container runs-[root@docker ~] # docker run-- rm-ti centos:centos7 # launches a container [root@2f504d6966dc /] # ifconfigeth0: flags=4163 mtu 1500 inet 172.7.5.2 netmask 255.255.255.0 broadcast 172.5.255 # IP172.7.5.2 ether 02:42:ac in nat mode: 07:05:02 txqueuelen 0 (Ethernet) RX packets 7417 bytes 13726936 (13.0 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 6118 bytes 473182 (462.0 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 second container runs In the form of federated network-format: Docker run-net=container:$ {container_id} [root@docker ~] # docker ps # View the ID value of the first container CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES2f504d6966dc centos:centos7 "/ bin/bash" 6 minutes ago Up 6 Minutes thirsty_ bhabha [root @ docker ~] # docker run-- rm-ti-- net=container:2f504d6966dc centos:centos7 [root@2f504d6966dc /] # ifconfigeth0: flags=4163 mtu 1500 inet 172.7.5.2 netmask 255.255.255.0 broadcast 172.5.255 ether 02:42:ac:07:05:02 txqueuelen 0 (Ethernet) RX packets 15431 bytes 27381590 (26.1 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 13359 bytes 1061065 (1.0 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 loop txqueuelen 1 (Local Loopback) RX packets 0 bytes 0 (0.0B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
