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Network Namespace、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
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[root@vultrvpn conf.d] # docker network create --driver bridge wordpress_net
ad1ff3d972e8bfe6d992a8403a98f46784aa75d5514adbf35ee6ae4528513be7
[root@vultrvpn conf.d] # docker network ls
NETWORK ID NAME DRIVER SCOPE
38fab5c74b87 bridge bridge local f0cf94dd0c5e host host local 465a31c55aa1 none null local ad1ff3d972e8 wordpress_net bridge local
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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
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[root@vultrvpn conf.d] # docker run -d --name db_mysql -m 220m --memory-swap 220m -v /data/docker_project/db_mysql/data:/var/lib/mysql -v /data/docker_project/db_mysql/conf:/etc/mysql/conf.d -e MYSQL_ROOT_PASSWORD=qwe123 --network=wordpress_net --ip=172.18.0.2 mysql:5.7
da497e56bd4b0f3434dd4f81534096574d167354dc508b657ceb390ba8e63771
docker: Error response from daemon: User specified IP address is supported only when connecting to networks with user configured subnets.
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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。
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docker network create --driver bridge --subnet 172.25.0.0 /16 wordpress_net
[root@vultrvpn conf.d] # docker network inspect wordpress_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" : {}
}
]
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在给容器指定一个ip
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[root@vultrvpn conf.d] # docker run -d --name my_vpn -m 100m --memory-swap 100m -e WORDPRESS_DB_HOST=172.25.0.2 -e WORDPRESS_DB_USER=root -e WORDPRESS_DB_PASSWORD=qwe123 -e WORDPRESS_DB_NAME=myvpn -p 8001:80 --network=wordpress_net wordpress:4.6
096518d84419476f71647a8c70c91c3f336ef8772af50672b88a9c1fd7b3a719
[root@vultrvpn conf.d] # docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
096518d84419 wordpress:4.6 "/entrypoint.sh apach" 47 seconds ago Up 47 seconds 0.0.0.0:8001->80 /tcp my_vpn
6d23ed99db20 wordpress:4.6 "/entrypoint.sh apach" About a minute ago Up About a minute 0.0.0.0:8000->80 /tcp my_wordpress
ade42edf5a93 mysql:5.7 "docker-entrypoint.sh" 3 minutes ago Up 3 minutes 3306 /tcp db_mysql
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正常创建
查看网卡信息
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[root@vultrvpn conf.d] # docker network inspect wordpress_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" : {}
}
]
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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。