當docker引擎啓動之後會默認創建一個網橋（docker0）用來給容器分配網絡地址
# ifconfig docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0 inet6 fe80::42:25ff:fe3b:de51 prefixlen 64 scopeid 0x20<link> ether 02:42:25:3b:de:51 txqueuelen 0 (Ethernet) RX packets 39997 bytes 2200888 (2.0 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 73015 bytes 101800508 (97.0 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
查看網絡列表
# docker network ls NETWORK ID NAME DRIVER SCOPE 4dd7d139f7fe bridge bridge local 23ac31428cb8 host host local bd7704585780 none null local
查看單個網絡信息
[root@i-2my2t6b9 ~]# docker network inspect bridge
[
{
"Name": "bridge",
"Id": "4dd7d139f7fe218fbe3ccdf67e59a16e9be827ab1525b6ec7a0090406860d529",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.0.1"
}
]
},
"Internal": false,
"Containers": {},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
},
"Labels": {}
}
]創建容器時如果未指定--network 參數 默認是bridge
# docker run --name 01 --hostname 01 ab44245321a8 /bin/bash
# docker run --name 02 --hostname 02 ab44245321a8 /bin/bash
# docker network inspect bridge
[
{
"Name": "bridge",
"Id": "4dd7d139f7fe218fbe3ccdf67e59a16e9be827ab1525b6ec7a0090406860d529",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.0.1"
}
]
},
"Internal": false,
"Containers": {
},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
},
"Labels": {}
}
]創建自己的網絡
# docker network create --subnet 172.11.0.0/16 Private_network
45bf464468a472dd3826673546a02c48cc2a66587b584718fea74cdf0a039dea
# docker network ls
NETWORK ID NAME DRIVER SCOPE
4dd7d139f7fe bridge bridge local
23ac31428cb8 host host local
bd7704585780 none null local
# docker network inspect 45bf464468a4
[
{
"Name": "Private_network",
"Id": "45bf464468a472dd3826673546a02c48cc2a66587b584718fea74cdf0a039dea",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "172.11.0.0/16"
}
]
},
"Internal": false,
"Containers": {},
"Options": {},
"Labels": {}
}
]
# docker run -itd --network 45bf464468a4 --name 04 --hostname 04 ab44245321a8 /bin/bash
2a078ed5fd88bc0db21b1bc97cf2d8024713c9df03dd1571ad71a19db2d1dc15
[root@i-2my2t6b9 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2a078ed5fd88 ab44245321a8 "/bin/bash" About a minute ago Up About a minute 04
[root@i-2my2t6b9 ~]# docker attach 2a078ed5fd88
[root@04 /]#
[root@04 /]#
[root@04 /]# ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:AC:0B:00:02
inet addr:172.11.0.2 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:acff:fe0b:2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:648 (648.0 b) TX bytes:648 (648.0 b)