本文章來自【知識林】

• 創(chuàng)建網(wǎng)絡(luò)

C:\Users\zsl-pc>docker network create test-net
39b38d32553cb89085bccb6d1359e3e1ebba570147c31c64c58e40d7967f9e50

說明：這里創(chuàng)建了一個名為test-net的網(wǎng)絡(luò)，創(chuàng)建成功后會得到該網(wǎng)絡(luò)的ID

• 列表網(wǎng)絡(luò)

C:\Users\zsl-pc>docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
86423d2ba03a        bridge              bridge              local
06445f4f5774        host                host                local
2d964ece79b9        none                null                local
39b38d32553c        test-net            bridge              local

說明：此時列表出來的結(jié)果除了默認(rèn)的三個網(wǎng)絡(luò)外，又增加了一個剛剛創(chuàng)建的test-net诫惭；其DRIVER是bridge說明在創(chuàng)建網(wǎng)絡(luò)時的默認(rèn)驅(qū)動是bridge；SCOPE指定了網(wǎng)絡(luò)的作用范圍怨绣，local表示只在當(dāng)前宿主機(jī)生效。

• 查看網(wǎng)絡(luò)詳情

C:\Users\zsl-pc>docker network inspect test-net
[
    {
        "Name": "test-net",
        "Id": "39b38d32553cb89085bccb6d1359e3e1ebba570147c31c64c58e40d7967f9e50",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1/16"
                }
            ]
        },
        "Internal": false,
        "Containers": {},
        "Options": {},
        "Labels": {}
    }
]

• 啟動容器并指定網(wǎng)絡(luò)

docker run -d -it --name c3 --network test-net centos /bin/bash -c "while true; do echo hello; sleep 1;done"
0968be0ab042ec35121774227bbecf5c5fd8a1faf0f7fd3b5ac0069af64e7709

說明：使用指令--network來指定容器的網(wǎng)絡(luò)

• 與名為bridge的網(wǎng)絡(luò)中的容器c2通過

在《16 - Docker network第二講-容器默認(rèn)網(wǎng)絡(luò)bridge》中我們創(chuàng)建了兩個容器c1和c2，這兩個容器都是屬于名為bridge的默認(rèn)網(wǎng)絡(luò)中萧吠，下面嘗試與任意一個容器通信（以c2為例纸型，其IP地址為172.17.0.3）：

C:\Users\zsl-pc>docker exec -it c3 /bin/bash
[root@0968be0ab042 /]# ping 172.17.0.3
PING 172.17.0.3 (172.17.0.3) 56(84) bytes of data.
^C
--- 172.17.0.3 ping statistics ---
18 packets transmitted, 0 received, 100% packet loss, time 17008ms

說明：可以看出現(xiàn)在c3是無法與c2進(jìn)行通信的。要讓這兩個容器通信需要讓他們在同一個網(wǎng)絡(luò)里面（就像局域網(wǎng)中的物理機(jī)一樣）琼腔。

C:\Users\zsl-pc>docker network connect test-net c2

C:\Users\zsl-pc>docker inspect c2

…………
"Networks": {
    "bridge": {
        "IPAMConfig": null,
        "Links": null,
        "Aliases": null,
        "NetworkID": "86423d2ba03ab5d46d66fe39bbba75d0d47d0fcc7dcbf250fcbbaa4b0085a029",
        "EndpointID": "78be5b7b0737d23082607fd016664017df77ceb1d469d9a3972033796ac8d761",
        "Gateway": "172.17.0.1",
        "IPAddress": "172.17.0.3",
        "IPPrefixLen": 16,
        "IPv6Gateway": "",
        "GlobalIPv6Address": "",
        "GlobalIPv6PrefixLen": 0,
        "MacAddress": "02:42:ac:11:00:03"
    },
    "test-net": {
        "IPAMConfig": {},
        "Links": null,
        "Aliases": [
            "7117f84edc26"
        ],
        "NetworkID": "39b38d32553cb89085bccb6d1359e3e1ebba570147c31c64c58e40d7967f9e50",
        "EndpointID": "071d239a9758d380fc265345030393cee3fc6d2d746b36af44bf6a6c5aeecd60",
        "Gateway": "172.18.0.1",
        "IPAddress": "172.18.0.3",
        "IPPrefixLen": 16,
        "IPv6Gateway": "",
        "GlobalIPv6Address": "",
        "GlobalIPv6PrefixLen": 0,
        "MacAddress": "02:42:ac:12:00:03"
    }
}

說明：使用命令docker inspect c2查看c2容器的詳情信息時可以看到其Networks中有兩個網(wǎng)絡(luò)信息bridge和test-net說明我們已經(jīng)讓c2與test-net連接在一起了圾笨，且c2在test-net這個網(wǎng)絡(luò)中的IP地址是：172.18.0.3擂达，此時再來檢測c2和c3的通信情況：

C:\Users\zsl-pc>docker exec -it c3 /bin/bash
[root@0968be0ab042 /]# ping -w 4 172.18.0.3
PING 172.18.0.3 (172.18.0.3) 56(84) bytes of data.
64 bytes from 172.18.0.3: icmp_seq=1 ttl=64 time=0.048 ms
64 bytes from 172.18.0.3: icmp_seq=2 ttl=64 time=0.077 ms
64 bytes from 172.18.0.3: icmp_seq=3 ttl=64 time=0.247 ms
64 bytes from 172.18.0.3: icmp_seq=4 ttl=64 time=0.137 ms
64 bytes from 172.18.0.3: icmp_seq=5 ttl=64 time=0.045 ms

--- 172.18.0.3 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 3996ms
rtt min/avg/max/mdev = 0.045/0.110/0.247/0.076 ms
[root@0968be0ab042 /]#

說明：c2和c3可以正常通信了，只是c2現(xiàn)在擁有兩個網(wǎng)絡(luò)信息：默認(rèn)的bridge和自定義的test-net。c2可以通過bridge網(wǎng)絡(luò)與c1通信抄腔，也可以通過test-net網(wǎng)絡(luò)與c3通信赫蛇，但c1和c3沒有共同的網(wǎng)絡(luò)，所以它們不可以通信暂幼。

• 從網(wǎng)絡(luò)中移除容器

C:\Users\zsl-pc>docker network disconnect bridge c2

C:\Users\zsl-pc>docker inspect c2

…………
"Networks": {
    "test-net": {
        "IPAMConfig": {},
        "Links": null,
        "Aliases": [
            "7117f84edc26"
        ],
        "NetworkID": "39b38d32553cb89085bccb6d1359e3e1ebba570147c31c64c58e40d7967f9e50",
        "EndpointID": "071d239a9758d380fc265345030393cee3fc6d2d746b36af44bf6a6c5aeecd60",
        "Gateway": "172.18.0.1",
        "IPAddress": "172.18.0.3",
        "IPPrefixLen": 16,
        "IPv6Gateway": "",
        "GlobalIPv6Address": "",
        "GlobalIPv6PrefixLen": 0,
        "MacAddress": "02:42:ac:12:00:03"
    }
}

說明：使用docker network disconnect命令來將容器移出網(wǎng)絡(luò)病瞳，這里將c2容器從bridge網(wǎng)絡(luò)中移除亲善，再使用docker inspect c2來查看容器詳情信息時设易，在Networks中只會看到test-net一個網(wǎng)絡(luò)，此時c2將只能與c3通信蛹头，不能與c1通信顿肺。

• 刪除網(wǎng)絡(luò)

C:\Users\zsl-pc>docker network rm test-net
Error response from daemon: network test-net has active endpoints

注意：當(dāng)網(wǎng)絡(luò)中還有容器時，此網(wǎng)絡(luò)不能被刪除渣蜗。rm后面可以跟多個網(wǎng)絡(luò)名稱屠尊，以空格隔開。

通過上面的這些例子已經(jīng)基本對Docker的網(wǎng)絡(luò)有些認(rèn)識耕拷，對Docker的的命令也有更進(jìn)一步的了解讼昆。

本文章來自【知識林】