[root@Centos-node4 dockerfile]# docker network ls NETWORK ID NAME DRIVER SCOPE c5091b86a2de bridge bridge local 832b9c357202 host host local 20dfc847adb8 none null local
第一种网络NULL
只有Lo接口，封闭式容器
[root@Centos-node4 ~]# docker run -it --rm --name t1 --network none busybox:latest / # ifconfig -a lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 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:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
第二种网络bridged，跟宿主机docker0相关联
[root@Centos-node4 ~]# docker run -it --rm --name t1 busybox:latest / # ifconfig eth0 Link encap:Ethernet HWaddr 02:42:AC:11:00:02 inet addr:172.17.0.2 Bcast:172.17.255.255 Mask:255.255.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:12 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:1016 (1016.0 B) TX bytes:0 (0.0 B) #指定DNS ，DNS搜索域 host [root@Centos-node4 ~]# docker run -it --rm --name t1 --network none -h t1 --dns 114.114.114.114 --dns-search test --add-host www.baidu.com:1.1.1.1 busybox:latest #共享网络空间 [root@Centos-node4 ~]# docker run -it --name b3 --network container:b2 --rm busybox #修改docker0桥的网络信息 [root@localhost /]# vi /etc/docker/daemon.json {"bip":"10.20.1.1/24", "fixed-cidr": "10.20.0.0/16", "fixed-cidr_v6": "2001:db8::/64", "mtu": 1500, "default-gateway": "10.20.1.1", "default-gateway-v6": "2001:db8:abcd::89", "dns": ["10.20.1.2","10.20.1.3"] } #修改监听地址 [root@localhost /]# vi /etc/docker/daemon.json {"hosts": ["tcp://0.0.0.0:2375"],"unix:///var/run/docker.sock"} #远程查看主机 docker -H 192.168.10.10:2375 ps #创建bridge网卡 [root@Centos-node4 ~]# docker network create -d bridge --subnet "192.168.56.0/24" --gateway "192.168.56.1" mybr0 1730edb366f7c72949437cc55b0a470e0be481d09c43f8bc16c85c2caa970d3c [root@Centos-node4 ~]# docker network ls
第三种 host共享主机网络
[root@Centos-node4 ~]# docker run -it --name b3 --network host --rm busybox
五 扩展 多台物理主机docker容器通信
root@Centos-node2 ~]# docker run -d -p 8500:8500 --name consul progrium/consul -server -bootstrap
#node3 node5主机添加以下配置
[root@Centos-node3 ~]# cat /etc/docker/daemon.json
{
"registry-mirrors": ["https://registry.docker-cn.com"],
"cluster-store":"consul://192.168.10.138:8500", #consul地址
"cluster-advertise":"192.168.10.139:2375" #本机地址
}
验证：
创建自定义全局网络
[root@Centos-node3 ~]# docker network create -d overlay ov_net1 1ce3d31db5dc8865bcfb0d8c06c3c9b6c7a62d8518ce7802263e9acad3ab8b80 [root@Centos-node3 ~]# docker network ls NETWORK ID NAME DRIVER SCOPE af13f853071f bridge bridge local fec447af9823 host host local aec79181307e my_net bridge local 5ad00d340d16 my_net2 bridge local 8c6172952391 none null local 1ce3d31db5dc ov_net1 overlay global #node3创建node4查看 [root@Centos-node4 ~]# docker network ls NETWORK ID NAME DRIVER SCOPE 2035b2339f4d bridge bridge local 832b9c357202 host host local 20dfc847adb8 none null local 1ce3d31db5dc ov_net1 overlay global
node3,node4分别启动容器指定全局网络测试互通
[root@Centos-node3 ~]# docker run -it --rm --network=ov_net1 busybox / # ping 10.0.0.2 PING 10.0.0.2 (10.0.0.2): 56 data bytes 64 bytes from 10.0.0.2: seq=0 ttl=64 time=1.322 ms 64 bytes from 10.0.0.2: seq=1 ttl=64 time=0.395 ms --- 10.0.0.2 ping statistics --- 2 packets transmitted, 2 packets received, 0% packet loss round-trip min/avg/max = 0.395/0.858/1.322 ms [root@Centos-node3 ~]# docker network ls NETWORK ID NAME DRIVER SCOPE af13f853071f bridge bridge local 5fd6e9efce57 docker_gwbridge bridge local #随机 为了让容器与外界通信 fec447af9823 host host local aec79181307e my_net bridge local 5ad00d340d16 my_net2 bridge local 8c6172952391 none null local 1ce3d31db5dc ov_net1 overlay global