docker network create
docker network connect
docker network ls
docker network rm
docker network disconnect
docker network inspect
创建网络
zane@zane-v:~$ docker network create simple-network
zane@zane-v:~$ docker network inspect simple-network
{
"name": "simple-network",
"id": "8bf58f43c56622d1100f7da9ef6506e45a4aa68556b586311f3756130c311d75",
"scope": "local",
"driver": "bridge",
"enableipv6": false,
"ipam": {
"driver": "default",
"options": {},
"config": [
{
"subnet": "172.20.0.0/16",
"gateway": "172.20.0.1/16"
}
]
},
"internal": false,
"containers": {},
"options": {},
"labels": {}
}进入一个键值存储。引擎支持consul,etcd,zookeeper.
在群集中的每个主机上正确配置的deamon引擎
支持overlay网络的docker选项：
--cluster-store-opt
使用--subnet选项直接指定子网络，在bridge网络中只可以指定一个子网络，而在overlay网络中支持多个子网络。
除了--subnet,还可以指定：--gateway,--ip-range,--aux-address选项。
$ docker network create -d overlay \ --subnet=192.168.0.0/16 \ --subnet=192.170.0.0/16 \ --gateway=192.168.0.100 \ --gateway=192.170.0.100 \ --ip-range=192.168.1.0/24 \ --aux-address="my-switch=192.168.1.6" \ --aux-address="my-nas=192.170.1.6" \
如何要创建自己定制的网络，docker也是支持很多选项的。
可以指定网络的端口号：
$ docker run -d -p --name redis --network my-network redis $ docker ps container id image mand created status ports names bafb0c808c53 redis "/entrypoint.sh redis" 4 seconds ago up 3 seconds 172.23.0.1:32770->6379/tcp redis
连接容器
可以连接已存在的容器到一个或者多个网络中。一个容器可以连接到多个不同网络驱动的网络中。
当连接一旦建立，容器便可以可其他的容器通讯，通过ip 或者 容器名称。
基本容器网络实例：
1.创建两个容器,container1 和 container2
$ docker run -itd --name=container1 busybox $ docker run -itd --name=container2 busybox zane@zane-v:~$ docker network create -d bridge --subnet 172.25.0.0/16 isolated_nw
3.连接container2到这个网络，然后验证一下：
zane@zane-v:~$ docker network connect isolated_nw container2
zane@zane-v:~$ docker network inspect isolated_nw
{
"name": "isolated_nw",
"id": "a8208641505d2d8fc37bf7cbd1027c01f0def461815786e076ef4ae65b7b2f9b",
"scope": "local",
"driver": "bridge",
"enableipv6": false,
"ipam": {
"driver": "default",
"options": {},
"config": [
{
"subnet": "172.25.0.0/16"
}
]
},
"internal": false,
"containers": {
"e9bce535ae32945f5e43340facdb6c16c93d92119e85b61c6cb7a5379a0caf63": {
"name": "container2",
"endpointid": "ef7244d32484407c3ec4aa30b7bdb0a6cbe3dbbfedc03e5c856ad20a08af172f",
"macaddress": "02:42:ac:19:00:02",
"ipv4address": "172.25.0.2/16",
"ipv6address": ""
}
},
"options": {},
"labels": {}
}注意container2，自动分配到了ip地址。此时container1,仍然连接在默认的bridge网络。
4.启动第三个container，但是这是使用--ip 选项指定它的ip地址，
zane@zane-v:~$ docker run --network=isolated_nw --ip=172.25.3.3 -itd --name=container3 busybox
5.检查container3使用的是哪个网络：
"networks": {
"isolated_nw": {
"ipamconfig": {
"ipv4address": "172.25.3.3"
},
"links": null,
"aliases": [
"adf68dd9e09c"
],
"networkid": "a8208641505d2d8fc37bf7cbd1027c01f0def461815786e076ef4ae65b7b2f9b",
"endpointid": "71d5d272d056b6111a83f0843a10d1944f1648f34d5099258d5865d053a939b0",
"gateway": "172.25.0.1",
"ipaddress": "172.25.3.3",
"ipprefixlen": 16,
"ipv6gateway": "",
"globalipv6address": "",
"globalipv6prefixlen": 0,
"macaddress": "02:42:ac:19:03:03"
}
}
}6.检查container2使用的是哪个网络：
"networks": {
"isolated_nw": {
"aliases": [
"e9bce535ae32"
],
"endpointid": "ef7244d32484407c3ec4aa30b7bdb0a6cbe3dbbfedc03e5c856ad20a08af172f",
"gateway": "172.25.0.1",
"globalipv6address": "",
"globalipv6prefixlen": 0,
"ipamconfig": {},
"ipaddress": "172.25.0.2",
"ipprefixlen": 16,
"ipv6gateway": "",
"links": null,
"macaddress": "02:42:ac:19:00:02",
"networkid": "a8208641505d2d8fc37bf7cbd1027c01f0def461815786e076ef4ae65b7b2f9b"
}
},注意:container2 在两个网络中间，它加入了默认bridge网络，当你在创建它的时候，然后又连接它到了isolation_nw.
一个容器可以连接到多个网络中
7.使用docker attach 命令连接一个正在运行的容器，然后查看
zane@zane-v:~$ docker attach container2 / # ifconfig -a eth1 link encap:ethernet hwaddr 02:42:ac:19:00:02 inet addr:172.25.0.2 bcast:0.0.0.0 mask:255.255.0.0 inet6 addr: fe80::42:acff:fe19:2/64 scope:link up broadcast running multicast mtu:1500 metric:1 rx packts:86 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:11780 (11.5 kib) tx bytes:648 (648.0 b) eth2 link encap:ethernet hwaddr 02:42:ac:11:00:03 inet addr:172.17.0.3 bcast:0.0.0.0 mask:255.255.0.0 inet6 addr: fe80::42:acff:fe11:3/64 scope:link up broadcast running multicast mtu:1500 metric:1 rx packets:23 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:3809 (3.7 kib) tx bytes:648 (648.0 b) lo link encap:local loopback inet addr:127.0.0.1 mask:255.0.0.0 inet6 addr: ::1/128 scope:host up loopback running mtu:65536 metric:1 rx packets:0 errors:0 dropped:0 overruns:0 frame:0 tx packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 rx bytes:0 (0.0 b) tx bytes:0 (0.0 b)
8.可以通过容器名称来相互连接
/ # ping -w 4 container3 ping container3 (172.25.3.3): 56 data bytes 64 bytes from 172.25.3.3: seq=0 ttl=64 time=0.077 ms 64 bytes from 172.25.3.3: seq=1 ttl=64 time=0.049 ms 64 bytes from 172.25.3.3: seq=2 ttl=64 time=0.047 ms 64 bytes from 172.25.3.3: seq=3 ttl=64 time=0.054 ms
虽然container1 和 container2 都在bridge网络中，但是他们是不支持 容器名称通信的。
zane@zane-v:~$ docker attach container2 / # ping container3 ping container3 (172.25.3.3): 56 data bytes 64 bytes from 172.25.3.3: seq=0 ttl=64 time=0.042 ms 64 bytes from 172.25.3.3: seq=1 ttl=64 time=0.050 ms 64 bytes from 172.25.3.3: seq=2 ttl=64 time=0.063 ms --- container3 ping statistics --- 3 packets transmitted, 3 packets received, 0% packet loss round-trip min/avg/max = 0.042/0.051/0.063 ms / # ping -w 4 container1 ping: bad address 'container1' / # ping -w 4 172.17.0.2 ping 172.17.0.2 (172.17.0.2): 56 data bytes 64 bytes from 172.17.0.2: seq=0 ttl=64 time=0.104 ms 64 bytes from 172.17.0.2: seq=1 ttl=64 time=0.052 ms 64 bytes from 172.17.0.2: seq=2 ttl=64 time=0.127 ms 64 bytes from 172.17.0.2: seq=3 ttl=64 time=0.057 ms --- 172.17.0.2 ping statistics --- 4 packets transmitted, 4 packets received, 0% packet loss round-trip min/avg/max = 0.052/0.085/0.127 ms
注意退出attach 时，使用ctr-p + ctr-q.
如果使用ctr-d 则会stop container.
zane@zane-v:~$ docker attach container3 / # ping -w 4 172.17.0.2 ping 172.17.0.2 (172.17.0.2): 56 data bytes --- 172.17.0.2 ping statistics --- 4 packets transmitted, 0 packets received, 100% packet loss
上面的实验我们知道，用户自定义的网络，是可以相互解析容器名的，也就是可以用容器名来相互同行。
定义网络别名 --link=container-name:alias
1.断开container2和isolated_nw的连接，然后
zane@zane-v:~$ docker network disconnect isolated_nw container2 zane@zane-v:~$ docker network rm simple-network
创建网络 docker network create simple-network
overlay网络条件 进入一个键值存储
支持overlay网络的docker选项 --cluser-store
指定子网络，网关，地址范围
将容器添加到网络中 docker network connect isolated_nw container2
连接一个正在运行的容器 docker attach
attach 的退出 ctr p + ctr q
默认bridge网络不支持，容器名称通信，其他网络支持； 使用link 来支持默认网络的容器名称通信
断开连接
docker network disconnect isolated_nw container2
删除网络
docker network rm simple-network
检测网络
docker network inspect isolated_nw
