1、自定义一个网络

• –driver bridge 桥接模式
• –subnet 192.168.10.0/24 子网
• –gateway 192.168.10.1 网关
• mynet 名称

[root@centos8 composetest]# docker network create --driver bridge --subnet 192.168.10.0/24 --gateway 192.168.10.1 mynet
0421a362dc33f4e7f1cf90e117c456f4ba049303c96210e9faff09d173dac940

[root@centos8 composetest]# docker network ls
NETWORK ID     NAME                  DRIVER    SCOPE
95c964c20427   bridge                bridge    local
9724db2f361a   composetest_default   bridge    local
1e997b0707ef   host                  host      local
0421a362dc33   mynet                 bridge    local
08c69e797fb6   none                  null      local

查看自定义的网络

[root@centos8 composetest]# docker network inspect mynet
[
    {
        "Name": "mynet",
        "Id": "0421a362dc33f4e7f1cf90e117c456f4ba049303c96210e9faff09d173dac940",
        "Created": "2021-12-10T08:52:02.943281609+08:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "192.168.10.0/24",
                    "Gateway": "192.168.10.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {},
        "Options": {},
        "Labels": {}
    }
]

2、用自定义网络启动两个redis

[root@centos8 composetest]# docker run -d --name redis01 -P --net mynet redis:5.0.14
511253a30fb96f00ac7698148cc2ecbb340399857c5fb893c8dbafbc636bc898
[root@centos8 composetest]# docker run -d --name redis02 -P --net mynet redis:5.0.14
d35685cd7e5f5cf0f14e2ca6e17c77c823784de297f861ae6b047744b857adc8
[root@centos8 composetest]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED              STATUS          PORTS                                         NAMES
d35685cd7e5f   redis:5.0.14   "docker-entrypoint.s…"   37 seconds ago       Up 35 seconds   0.0.0.0:49154->6379/tcp, :::49154->6379/tcp   redis02
511253a30fb9   redis:5.0.14   "docker-entrypoint.s…"   About a minute ago   Up 43 seconds   0.0.0.0:49153->6379/tcp, :::49153->6379/tcp   redis01
[root@centos8 composetest]# docker network inspect mynet
[
    {
        "Name": "mynet",
        "Id": "0421a362dc33f4e7f1cf90e117c456f4ba049303c96210e9faff09d173dac940",
        "Created": "2021-12-10T08:52:02.943281609+08:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "192.168.10.0/24",
                    "Gateway": "192.168.10.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "511253a30fb96f00ac7698148cc2ecbb340399857c5fb893c8dbafbc636bc898": {
                "Name": "redis01",
                "EndpointID": "0732d3a62e2942d892da7f4cdffbad813e44e6a5acf9cf24a52eb9c08850fba6",
                "MacAddress": "02:42:c0:a8:0a:02",
                "IPv4Address": "192.168.10.2/24",
                "IPv6Address": ""
            },
            "d35685cd7e5f5cf0f14e2ca6e17c77c823784de297f861ae6b047744b857adc8": {
                "Name": "redis02",
                "EndpointID": "712c541524002edf7676a77baec0c40be65866328005e0a4cc4d0ed31dd4cf59",
                "MacAddress": "02:42:c0:a8:0a:03",
                "IPv4Address": "192.168.10.3/24",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {}
    }
]

# 自定义的网络可以直接使用名称连接
[root@centos8 composetest]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS         PORTS                                         NAMES
d35685cd7e5f   redis:5.0.14   "docker-entrypoint.s…"   6 minutes ago   Up 6 minutes   0.0.0.0:49154->6379/tcp, :::49154->6379/tcp   redis02
511253a30fb9   redis:5.0.14   "docker-entrypoint.s…"   7 minutes ago   Up 6 minutes   0.0.0.0:49153->6379/tcp, :::49153->6379/tcp   redis01
[root@centos8 composetest]# docker exec -it 511253a30fb9 /bin/bash
root@511253a30fb9:/data# redis-cli -h redis02
redis02:6379> ping
PONG

3、网络连通

连通容器 mysql01 和 mynet 网络

docker network connect mynet mysql01

4、指定容器的ip地址 --ip 192.168.10.101

docker run -d --name redis02 -P --net mynet --ip 192.168.10.101 redis:5.0.14 --notify-keyspace-events Ex --appendonly yes