介绍
由 https://www.malaoshi.top/show_1EF5xCV2BIyn.html 可知，通过docker-compose创建容器时，也会创建新网络，网络名由docker生成
指定新网络名
version: '3'
services:
tomcat1:
image: tomcat # 镜像
container_name: tomcat1 # 指定容器名称
networks:
- mynet
ports: # bridge网络模式，指定映射端口
- "8080:8080"
# network_mode: "host" # 指定网络模式
restart: always # 当docker服务启动时，容器总是跟着启动
networks:
mynet:
启动
docker-compose up -d
执行结果：
Creating network "docker_tomcat_mynet" with the default driver
Creating tomcat2 ... done
执行时会创建网络，网络名是：docker_tomcat_mynet，容器使用该网络，容器之间网络通信，可以通过容器名通信
查看网络列表
docker network ls
执行结果：
NETWORK ID NAME DRIVER SCOPE
2b55b4d8cb35 bridge bridge local
693583264ce3 docker_tomcat_mynet bridge local
de8e17860cc8 host host local
c25c6222ce03 none null local
docker_tomcat_mynet 就是刚才创建的网络
查看网络详细信息
docker network inspect docker_tomcat_mynet
执行结果如下：
[
{
"Name": "docker_tomcat_mynet",
"Id": "693583264ce3063ec8f6ce1b8e6e6aae8a257d0008d18a77563368ff26636a4b",
"Created": "2020-07-27T11:56:53.06880692+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "192.168.48.0/20",
"Gateway": "192.168.48.1"
}
]
},
"Internal": false,
"Attachable": true,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"6524db462d97deb4bb99fa14e596f23c12089c15a488116427763d7a877030a6": {
"Name": "tomcat2",
"EndpointID": "1315ac70329bc7618d54b9a208235dbbdd8ca1c9c4514db2f539dfea052c4a33",
"MacAddress": "02:42:c0:a8:30:02",
"IPv4Address": "192.168.48.2/20",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {
"com.docker.compose.network": "mynet",
"com.docker.compose.project": "docker_tomcat",
"com.docker.compose.version": "1.26.2"
}
}
]
该网络的网段是："Subnet": "192.168.48.0/20",，由docker生成
指定ip网段
version: '3'
services:
tomcat1:
image: tomcat # 镜像
container_name: tomcat1 # 指定容器名称
networks:
- mynet
ports: # bridge网络模式，指定映射端口
- "8080:8080"
# network_mode: "host" # 指定网络模式
restart: always # 当docker服务启动时，容器总是跟着启动
networks:
mynet:
driver: bridge
ipam:
config:
- subnet: 172.50.0.0/16
查看网络列表
docker network ls
执行结果：
2b55b4d8cb35 bridge bridge local
b4b0ddc79d72 docker_tomcat_mynet bridge local
de8e17860cc8 host host local
c25c6222ce03 none null local
31a1c1f34ee1 testnet bridge local
docker_tomcat_mynet 就是刚才创建的网络
查看网络详细信息
docker network inspect docker_tomcat_mynet
执行结果：
[
{
"Name": "docker_tomcat_mynet",
"Id": "b4b0ddc79d72e84efd42a2d63a3ea06107a8a3fd1533bcf61d956400619e4305",
"Created": "2020-07-27T11:45:41.83651529+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.50.0.0/16"
}
]
},
"Internal": false,
"Attachable": true,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"ac3d4ea16b1c5e081ecddef48ab8e0bae042292840318e6afd692668cd632ee7": {
"Name": "tomcat2",
"EndpointID": "0b59ab2da3429852a17067d7b015fb918398b38645784d26bcbcd95ae9e467c6",
"MacAddress": "02:42:ac:32:00:02",
"IPv4Address": "172.50.0.2/16",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {
"com.docker.compose.network": "mynet",
"com.docker.compose.project": "docker_tomcat",
"com.docker.compose.version": "1.26.2"
}
}
]
查看该网络的网段，与上面设置的是一致的
使用默认的bridge网络
version: '3'
services:
tomcat1:
image: tomcat # 镜像
container_name: tomcat1 # 指定容器名称
network_mode: bridge
ports: # bridge网络模式，指定映射端口
- "8080:8080"
# network_mode: "host" # 指定网络模式
restart: always # 当docker服务启动时，容器总是跟着启动
由于使用的是默认的bridge网络，只能通过ip通信，不能通过容器名通信
使用已存在的自定义网络
创建网络
docker network create --subnet=172.18.0.0/16 mynetwork
yml内容：
version: '3'
services:
tomcat1:
image: tomcat # 镜像
container_name: tomcat1 # 指定容器名称
networks:
- default
ports: # bridge网络模式，指定映射端口
- "8080:8080"
# network_mode: "host" # 指定网络模式
restart: always # 当docker服务启动时，容器总是跟着启动
networks:
default:
external:
name: mynetwork
使用 mynetwork网络的容器，可通过 ip 或 容器名 通信
指定容器ip
version: '3'
services:
tomcat1:
image: tomcat # 镜像
container_name: tomcat3 # 指定容器名称
networks:
default:
ipv4_address: 172.18.0.31
ports: # bridge网络模式，指定映射端口
- "8080:8080"
# network_mode: "host" # 指定网络模式
restart: always # 当docker服务启动时，容器总是跟着启动
networks:
default:
external:
name: testnet