Docker为网络bridge模式指定容器ip的方法
前言
众所周知bridge模式是Docker默认的网络设置，此模式会为每一个容器分配NetworkNamespace、设置IP等，并将一个主机上的Docker容器连接到一个虚拟网桥上。下面来看看Docker为网络bridge模式指定容器ip的方法。
实现方法
如果只是简单创建一个bridge模式的网络是无法给容器指定ip的
[root@vultrvpnconf.d]#dockernetworkcreate--driverbridgewordpress_net ad1ff3d972e8bfe6d992a8403a98f46784aa75d5514adbf35ee6ae4528513be7 [root@vultrvpnconf.d]#dockernetworkls NETWORKIDNAMEDRIVERSCOPE 38fab5c74b87bridgebridgelocal f0cf94dd0c5ehosthostlocal 465a31c55aa1nonenulllocal ad1ff3d972e8wordpress_netbridgelocal
已创建一个wordpress_net的网络，在这个网络模块上创建一个容器，并指定ip
[root@vultrvpnconf.d]#dockerrun-d--namedb_mysql-m220m--memory-swap220m-v/data/docker_project/db_mysql/data:/var/lib/mysql-v/data/docker_project/db_mysql/conf:/etc/mysql/conf.d-eMYSQL_ROOT_PASSWORD=qwe123--network=wordpress_net--ip=172.18.0.2mysql:5.7 da497e56bd4b0f3434dd4f81534096574d167354dc508b657ceb390ba8e63771 docker:Errorresponsefromdaemon:UserspecifiedIPaddressissupportedonlywhenconnectingtonetworkswithuserconfiguredsubnets.
提示了一个错误，若要配置ip，则需要给这个网络指定一个subnet。所以重新搞一个网络。
dockernetworkcreate--driverbridge--subnet172.25.0.0/16wordpress_net
[root@vultrvpnconf.d]#dockernetworkinspectwordpress_net
[
{
"Name":"wordpress_net",
"Id":"925e64493df9b674ef9bdadaae380c8a335aa6353e48b447cb5d910df19c3a3e",
"Scope":"local",
"Driver":"bridge",
"EnableIPv6":false,
"IPAM":{
"Driver":"default",
"Options":{},
"Config":[
{
"Subnet":"172.25.0.0/16"
}
]
},
"Internal":false,
"Containers":{},
"Options":{},
"Labels":{}
}
]
在给容器指定一个ip
[root@vultrvpnconf.d]#dockerrun-d--namemy_vpn-m100m--memory-swap100m-eWORDPRESS_DB_HOST=172.25.0.2-eWORDPRESS_DB_USER=root-eWORDPRESS_DB_PASSWORD=qwe123-eWORDPRESS_DB_NAME=myvpn-p8001:80--network=wordpress_networdpress:4.6 096518d84419476f71647a8c70c91c3f336ef8772af50672b88a9c1fd7b3a719 [root@vultrvpnconf.d]#dockerps-a CONTAINERIDIMAGECOMMANDCREATEDSTATUSPORTSNAMES 096518d84419wordpress:4.6"/entrypoint.shapach"47secondsagoUp47seconds0.0.0.0:8001->80/tcpmy_vpn 6d23ed99db20wordpress:4.6"/entrypoint.shapach"AboutaminuteagoUpAboutaminute0.0.0.0:8000->80/tcpmy_wordpress ade42edf5a93mysql:5.7"docker-entrypoint.sh"3minutesagoUp3minutes3306/tcpdb_mysql
正常创建
查看网卡信息
[root@vultrvpnconf.d]#dockernetworkinspectwordpress_net
[
{
"Name":"wordpress_net",
"Id":"925e64493df9b674ef9bdadaae380c8a335aa6353e48b447cb5d910df19c3a3e",
"Scope":"local",
"Driver":"bridge",
"EnableIPv6":false,
"IPAM":{
"Driver":"default",
"Options":{},
"Config":[
{
"Subnet":"172.25.0.0/16"
}
]
},
"Internal":false,
"Containers":{
"096518d84419476f71647a8c70c91c3f336ef8772af50672b88a9c1fd7b3a719":{
"Name":"my_vpn",
"EndpointID":"e44636c2b3a49d4aedaad68cd6ca17aea3a9fe4f71afecb27219a6412701536a",
"MacAddress":"02:42:ac:19:00:04",
"IPv4Address":"172.25.0.4/16",
"IPv6Address":""
},
"6d23ed99db20f17d99dd5dcf6cc65f5ced8cb936917dee044914cf278179150c":{
"Name":"my_wordpress",
"EndpointID":"3c765d5953428c1d66be584eb0d34b58f6eee3f598e3a37263d54d77e2b87263",
"MacAddress":"02:42:ac:19:00:03",
"IPv4Address":"172.25.0.3/16",
"IPv6Address":""
},
"ade42edf5a934b02f7bb741bd5a45a282a50d3a49e9f1866579e8f93fef22a0e":{
"Name":"db_mysql",
"EndpointID":"2322bfb9da72b3b6db68d59cea97172e66b960ca5b782bd2fa7d09f9c93f0288",
"MacAddress":"02:42:ac:19:00:02",
"IPv4Address":"172.25.0.2/16",
"IPv6Address":""
}
},
"Options":{},
"Labels":{}
}
]
总结
以上就是这篇文章的全部内容了，希望本文的内容对大家能有所帮助，如果有疑问大家可以留言交流。