docker容器虚拟化网络

linux内核支持六种名称空间

1、主机名和域名  ------->  UTS

2、用户  -------->  User

3、文件挂载系统   ------->  mount

4、进程间通信     -------> IPC

5、进程PID  ------->    PID

6、网络  ------> NET

[root@docker ~]# docker network ls
NETWORK ID NAME DRIVER SCOPE
9f50659d78cd bridge bridge local
992ea9a0a36e compose_lnmp_lnmp bridge local
e8840f5df773 host host local
b7d3e9a1b1d2 none null local

[root@docker ~]# ip a | grep docker0
5: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
7: vethcef904c@if6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP group default

此时的docker没有给IP，所以是一个交换机，给了IP就是网卡