docker默认3中网络类型
参考: https://docs.docker.com/engine/userguide/networking/
$ docker network ls
NETWORK ID NAME DRIVER
7fca4eb8c647 bridge bridge
9f904ee27bf5 none null
cf03ee007fb4 host host- bridge 桥接到docker0网卡
- host 和宿主机共享网卡
- none 无网卡
手动创建net
手动创建net的类型是 bridge模式
docker network create neta
$ docker network list
NETWORK ID NAME DRIVER SCOPE
19856a1ad2b4 neta bridge local最佳实践
- 分别启动b1 b2(neta)
docker run -itd --name=b1 busybox
docker run -itd --name=b2 --net=neta busybox
- 查看他们ip
docker exec -it b1 ip ad
docker exec -it b2 ip ad
- b2 ping b1 不通
docker exec -it b2 ping 172.17.0.2
- 将b1连到neta,再次ping通了
docker network connect neta b1
docker exec -it b2 ping 172.18.0.3
- 查看b1,发现b1多了一块网卡
$ docker exec -it b1 ip ad
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
10: eth0@if11: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.2/16 scope global eth0
valid_lft forever preferred_lft forever
14: eth1@if15: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:ac:12:00:03 brd ff:ff:ff:ff:ff:ff
inet 172.18.0.3/16 scope global eth1
valid_lft forever preferred_lft forever
- 自定义的网卡自带dns
$ docker exec -it b1 hostname
655e40ab3eed
$ docker exec -it b2 hostname
3c821d2e8b05
$ docker exec -it b2 ping 655e40ab3eed
PING 655e40ab3eed (172.18.0.3): 56 data bytes
64 bytes from 172.18.0.3: seq=0 ttl=64 time=0.085 ms
64 bytes from 172.18.0.3: seq=1 ttl=64 time=0.129 ms
- 默认dns是
docker exec -it b2 cat /etc/resolv.conf
nameserver 127.0.0.11
