Docker Foundation (3)-- basic Network Model

Bridge (default)

Default option Therefore, there is no need to use the--network option, use the default docker0 bridge; you can access the external network, but the external network needs to pass through the firewall to access the local container;

[root@www ~]# docker run --rm --name bux1 --network bridge busybox:1.29 ifconfig -aeth0 Link encap:Ethernet HWaddr 02:42:AC:11:00:03 inet addr:172.17.0.3 Bcast:172.17.255.255 Mask:255.255.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:180 (180.0 B) TX bytes:0 (0.0 B) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

Port mapping:

[root@www ~]# docker container run --name ngx1 --rm -p 80 ljymyy/nginx

[root@www ~]# docker port ngx180/tcp -> 0.0.0.0:32768

2.

[root@www ~]# docker container run --name ngx1 --rm -p 80:80 ljymyy/nginx[root@www ~]# docker port ngx180/tcp -> 0.0.0.0:80

3.

[root@www ~]# docker container run --name ngx1 --rm -p 172.16.75.3::80 ljymyy/nginx[root@www ~]# docker port ngx180/tcp -> 172.16.75.3:32768

4.

[root@www ~]# docker container run --name ngx1 --rm -p 172.16.75.3:80:80 ljymyy/nginx[root@www ~]# docker port ngx180/tcp -> 172.16.75.3:80

5. Use the "-P" option to expose ports;

[root@www ~]# docker container run --name ngx1 --rm -P ljymyy/nginx[root@www ~]# docker port ngx180/tcp -> 0.0.0.0:32769

6. Use the "--expose" option to manually specify ports for exposure;

[root@www ~]# docker container run --name bux --rm -it -P --expose 123 --expose 678 busybox:1.29/ #[root@www ~]# docker port bux123/tcp -> 0.0.0.0:32771678/tcp -> 0.0.0.0:32770

NONE

Do not specify any IP address and port number, generally used for various offline operations such as data backup and recovery;

[root@www ~]# docker run --rm --name bux1 --network none busybox:1.29 ifconfig -alo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

Container

First let a container open port 2222; then use another container joined container, observe its port number;

[root@www ~]# docker run --name bux1 -d -p 2222 busybox:1.29 /bin/httpd -p 2222 -ff3c8d49bddc8a9f3597ef9ab6fcf2dbf4b8e3e831fa67803b06a95d7da0b5bfb[root@www ~]# docker run --name bux2 --network container:bux1 busybox:1.29 netstat -tanActive Internet connections (servers and established)Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 :::2222 :::* LISTEN