docker网络如何配置
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docker的网络
docker network
docker有3个默认网络
[root@srv00 ~]# docker network ls NETWORK ID NAME DRIVER b891bd36a3f1 bridge bridge 739cb6a018f7 host host d0e062995920 none null
默认容器都是运行在 bridge 网络下
运行个容器测试下
[root@srv00 ~]# docker run -itd --name nw centos 5ffb7062805af03b00ecc6160a78c855a7d1b7c32bfcc14d78ce036f2df9a517 [root@srv00 ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 5ffb7062805a centos "/bin/bash" About a minute ago Up About a minute nw
--name给容器命名,否则docker自动命名.
查看bridge网络下的容器有哪些:
[root@srv00 ~]# docker network inspect bridge
[
{
"Name": "bridge",
"Id": "b891bd36a3f12dc2bb1f4526c0fc2741c0f8ccf6011071116840b6b31f9b20ac",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.42.1"
}
]
},
"Internal": false,
"Containers": {
"5ffb7062805af03b00ecc6160a78c855a7d1b7c32bfcc14d78ce036f2df9a517": {
"Name": "nw",
"EndpointID": "65f410576be2d9aadb697ebb820e372ffb2073db7868ec001e87da5c8cf40d71",
"MacAddress": "02:42:ac:11:00:02",
"IPv4Address": "172.17.0.2/16",
"IPv6Address": ""
},
"616d942216ee7050ecff07ca66d2d7583d4093820e9d1448f96b417d7d779408": {
"Name": "high_shockley",
"EndpointID": "de09ec8b400b2724238d78ece5ff24201b7baffcdb7279809ea6b1beae5fec1d",
"MacAddress": "02:42:ac:11:00:06",
"IPv4Address": "172.17.0.6/16",
"IPv6Address": ""
},
"dead20777b6c1609ab968966b3589904d44f8a12c124c178fd5cb540052cce6f": {
"Name": "gloomy_cray",
"EndpointID": "1ba62447dd2d89165fc7079442a2016fb1c44caa02cca7cda6bf363eec2841da",
"MacAddress": "02:42:ac:11:00:07",
"IPv4Address": "172.17.0.7/16",
"IPv6Address": ""
},
"e709f66c9bdbcc20f92b804e483bb566bc4ee934fa1e2e5cdbf4759f7ac1923c": {
"Name": "tiny_shockley",
"EndpointID": "a070387813fc17fd54ab389b4afe40c80c5dbbe42c86983a89a84a65cf32e378",
"MacAddress": "02:42:ac:11:00:01",
"IPv4Address": "172.17.0.1/16",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
},
"Labels": {}
}
]可以看到刚运行的容器nw的ip是
172.17.0.2
我们可以将某个容器从网络中移除
[root@srv00 ~]# docker exec -it high_shockley /bin/bash [root@616d942216ee /]# ping 172.17.0.2 PING 172.17.0.2 (172.17.0.2) 56(84) bytes of data. 64 bytes from 172.17.0.2: icmp_seq=1 ttl=64 time=0.100 ms 64 bytes from 172.17.0.2: icmp_seq=2 ttl=64 time=0.065 ms ^C --- 172.17.0.2 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 999ms rtt min/avg/max/mdev = 0.065/0.082/0.100/0.019 ms [root@616d942216ee /]# exit exit
先进入同网络的另一个容器ping,可以ping通.
[root@srv00 ~]# docker network disconnect bridge nw [root@srv00 ~]# docker exec -it high_shockley /bin/bash [root@616d942216ee /]# ping 172.17.0.2 PING 172.17.0.2 (172.17.0.2) 56(84) bytes of data. ^C --- 172.17.0.2 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 1999ms [root@616d942216ee /]# exit exit [root@srv00 ~]# docker network inspect bridge ...
可以看到ping不通.也不在bridge网络里了.通过
docker inspect nw已经没有ip地址了.
创建自己的 bridge network
docker 支持 两个网络驱动类型'bridge'和overlay. 'bridge' 是运行在统一主机上的网络.overlay可以包括多个主机.
这里我们先创建自己的'bridge'网络
[root@srv00 ~]# docker network create -d bridge mynetwork
072dbe030461bc1f7e1bc4829017f13ade899b09b606d12dfb8b6dec496a08bf
[root@srv00 ~]# docker network ls
NETWORK ID NAME DRIVER
b891bd36a3f1 bridge bridge
739cb6a018f7 host host
072dbe030461 mynetwork bridge
d0e062995920 none null
[root@srv00 ~]# docker network inspect mynetwork
[
{
"Name": "mynetwork",
"Id": "072dbe030461bc1f7e1bc4829017f13ade899b09b606d12dfb8b6dec496a08bf",
"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": {}
}
]
mynetwork下一个容器都没有
运行个容器在mynetwork下
[root@srv00 ~]# docker run -itd --net mynetwork --name nw1 centos
c5b59a1e180753301460b597b87b1608b00ebe2b8620b41b8851938c6eab8044
[root@srv00 ~]# docker network inspect mynetwork
[
{
"Name": "mynetwork",
"Id": "072dbe030461bc1f7e1bc4829017f13ade899b09b606d12dfb8b6dec496a08bf",
"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": {
"c5b59a1e180753301460b597b87b1608b00ebe2b8620b41b8851938c6eab8044": {
"Name": "nw1",
"EndpointID": "ed444519fd958ddd83d64f62719f485f62d284f2a647536e4f48a8128e62ad5e",
"MacAddress": "02:42:ac:12:00:02",
"IPv4Address": "172.18.0.2/16",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {}
}
]测试下互通性 先把nw连到bridge网络
[root@srv00 ~]# docker network connect bridge nw [root@srv00 ~]# docker exec -it nw /bin/bash [root@5ffb7062805a /]# ping 172.18.0.2 PING 172.18.0.2 (172.18.0.2) 56(84) bytes of data. ^C --- 172.18.0.2 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 1999ms
不同网络中的容器不通.
将nw也加入到mynetwork
[root@srv00 ~]# docker network connect mynetwork nw [root@srv00 ~]# docker network inspect mynetwork [root@srv00 ~]# docker network inspect bridge
可以看到2个网络中都有nw
[root@srv00 ~]# docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' nw
172.17.0.2172.18.0.3
[root@srv00 ~]# docker exec -it nw /bin/bash
[root@5ffb7062805a /]# ping 172.18.0.2 -c3
PING 172.18.0.2 (172.18.0.2) 56(84) bytes of data.
64 bytes from 172.18.0.2: icmp_seq=1 ttl=64 time=0.093 ms
64 bytes from 172.18.0.2: icmp_seq=2 ttl=64 time=0.057 ms
64 bytes from 172.18.0.2: icmp_seq=3 ttl=64 time=0.076 ms
--- 172.18.0.2 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.057/0.075/0.093/0.016 ms
[root@5ffb7062805a /]# ping 172.17.0.6 -c3
PING 172.17.0.6 (172.17.0.6) 56(84) bytes of data.
64 bytes from 172.17.0.6: icmp_seq=1 ttl=64 time=0.102 ms
64 bytes from 172.17.0.6: icmp_seq=2 ttl=64 time=0.080 ms
^C
--- 172.17.0.6 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.080/0.091/0.102/0.011 msnw 这台容器有两个ip,同时在两个网段中,两个网络中的容器都可以互通.
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