查看网络模式
docker network ls
NETWORK ID NAME DRIVER SCOPE
6856e3d6a118 bridge bridge local
74519c816cff host host local
9187a93406a2 none null local
ecb198e04339 test-net bridge local
查看容器网络配置
docker inspect 06c88a111a61 | grep -i "network"
"NetworkMode": "default",
"NetworkSettings": {
"Networks": {
"NetworkID": "6856e3d6a118c05fb39f557be229a5cb3ee7a9cc66788a25ce56e19f73bda999",
类似用法： docker inspect 06c88a111a61 | grep -i "IP" 查看ip信息
查看所有容器的ip
docker inspect -f '{{.Name}} - {{range .NetworkSettings.Networks}} {{.IPAddress}} {{end}}' $(docker ps -aq)
/redis - 172.17.0.4 172.18.0.4
/php-fpm - 172.17.0.3 172.18.0.3
/nginx - 172.17.0.2 172.18.0.2
/myrabbit - 172.17.0.4
创建docker 网络
docker network create -d bridge --subnet 172.17.0.0/16 my-net
（-d bridge可以省略）
Error response from daemon: Pool overlaps with other one on this address space
如果报错，说明172.17.0.0已被其他网络空间占用（默认bridge就是这个子网段），此时可以改172.18.0.0
docker network create --subnet 172.18.0.0/16 my-net
查看网络具体信息
docker network inspect my-net
[
{
"Name": "my-net",
"Id": "684e82a9f4d171ee379eb637c2190863d21d7d23be659994db13643a8861da72",
"Created": "2021-03-16T02:42:28.239558199Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "172.18.0.0/16"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {},
"Options": {},
"Labels": {}
}
]
容器创建时，连接网络和指定ip
docker run --network=my-net --ip=172.18.0.3 -itd --name=redis-test -d redis
容器创建后，新增网络和指定ip（相当于给某容器多接上一条网线）
docker run --name redis-test2 -d redis (默认接入bridge网络，172.17.0.0网段)
docker network connect --ip 172.18.0.5 my-net redis-test2 (连接新网络，并指定ip)
docker inspect redis-test2
可以查看到接入了两个网络：
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "70d8553b1b8fa83cea39a42943f86734c4883f6ab19913cfe1e3d57dc312e715",
"EndpointID": "",
"Gateway": "",
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "",
"DriverOpts": null
},
"my-net": {
"IPAMConfig": {
"IPv4Address": "172.18.0.5"
},
"Links": null,
"Aliases": [
"393c4a6faeb2"
],
"NetworkID": "",
"EndpointID": "",
"Gateway": "",
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "",
"DriverOpts": {}
}
}
}
网络别名（创建容器时指定）
docker run --network=my-net --ip=172.18.0.6 --network-alias r4-alias -itd --name=redis-test3 -d redis
可以看到，此时指定别名r4-alias，
因为redis-test容器也是my-net网络内，此时可以ping r4-alias
docker exec -it redis-test bash
ping r4-alias
PING m5 (172.18.0.6) 56(84) bytes of data.
64 bytes from redis-test3.my-net (172.18.0.6): icmp_seq=1 ttl=64 time=0.146 ms
64 bytes from redis-test3.my-net (172.18.0.6): icmp_seq=2 ttl=64 time=0.112 ms
64 bytes from redis-test3.my-net (172.18.0.6): icmp_seq=3 ttl=64 time=0.108 ms
网络别名添加（创建容器之后追加）
docker run -itd --name=redis-test4 redis
docker network connect --alias r4-alias --ip=172.18.0.7 my-net redis-test4