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Understanding docker networking
- 8. Bridge Network - docker0
Network switch
eth0: 192.168.1.100
veth2f54929
iptables NAT/port mapping
C1
eth0
172.17.0.2
C3
eth0
172.17.0.4
vethfd281a2
docker0: 172.17.0.1
C2
eth0
172.17.0.3
veth7c6c00b
$ docker run -it alpine sh
- 10. Custom Bridge Network - mybridge
Network switch
eth0: 192.168.1.100
veth439b754
iptables NAT/port mapping
C1
eth0
172.20.0.2
C3
eth0
172.20.0.4
vethd87c43d
mybridge: 172.20.0.1
C2
eth0
172.20.0.3
veth8f2c1d7
$ docker network create -d bridge -o com.docker.network.bridge.name=mybridge mybridge
$ docker run -it --net mybridge alpine sh
- 12. Custom Bridge Network IPAM underlay - myunderbr
Network switch
gateway 192.168.10.254
eth0: 192.168.10.10
veth029cee0
C1
eth0
192.168.10.90
C3
eth0
192.168.10.92
vethf583d4b
myunderbr: 192.168.10.254
C2
eth0
192.168.10.91
veth0eedd9d
$ docker network create -d bridge --subnet=192.168.10.0/24 --gateway=192.168.10.254
--aux-address DefaultGatewayIPv4=192.168.10.1 -o com.docker.network.bridge.name=myunderbr myunderbr
$ brctl addif myunderbr enp5s0
$ docker run -it --net myunderbr alpine sh
$ docker run -it --net myunderbr --ip 192.168.10.90 nginx:1.9
- 14. Overlay network - myoverlay
Network switch
eth0: 192.168.1.100
iptables NAT/port mapping
docker_gwbridge: 172.18.0.1
C1
eth1
172.18.0.3
vetha193f81
eth0
10.0.0.3
C2
eth1
172.18.0.4
vethee8511c
eth0
10.0.0.4
C3
eth1
172.18.0.5
veth89bbbe5
eth0
10.0.0.5
myoverlay - VNI 100
eth0: 192.168.1.110
iptables NAT/port mapping
docker_gwbridge: 172.18.0.1
C1
eth1
172.18.0.3
veth62e4b94
eth0
10.0.0.6
C2
eth1
172.18.0.4
veth4e85bca
eth0
10.0.0.7
C3
eth1
172.18.0.5
veth343fe37
eth0
10.0.0.8
myoverlay - VNI 100
eth0: 192.168.1.120
iptables NAT/port mapping
docker_gwbridge: 172.18.0.1
C1
eth1
172.18.0.3
veth218d196
eth0
10.0.0.9
C2
eth1
172.18.0.4
veth09fe1d8
eth0
10.0.0.10
C3
eth1
172.18.0.5
veth4000548
eth0
10.0.0.11
myoverlay - VNI 100
$ docker network create -d overlay myoverlay
$ docker service create --network myoverlay nginx
- 17. Macvlan & Ipvlan
Network switch (gateway 172.16.1.1)
eth0: 172.16.1.253 (IP optional)
C1
eth0
172.16.1.10
C3C2
eth0
172.16.1.11
eth0
172.16.1.12
eth0: 172.16.1.254 (IP optional)
C4
eth0
172.16.1.13
C6C5
eth0
172.16.1.14
eth0
172.16.1.15