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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.
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 ms
nw 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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