前言
眾所周知bridge模式是Docker默認的網絡設置，此模式會為每一個容器分配Network Namespace、設置IP等，并將一個主機上的Docker容器連接到一個虛擬網橋上。下面來看看Docker為網絡bridge模式指定容器ip的方法。
實現方法
如果只是簡單創建一個bridge模式的網絡是無法給容器指定ip的
[root@vultrvpn conf.d]# docker network create --driver bridge wordpress_netad1ff3d972e8bfe6d992a8403a98f46784aa75d5514adbf35ee6ae4528513be7[root@vultrvpn conf.d]# docker network lsNETWORK ID NAME DRIVER SCOPE38fab5c74b87 bridge bridge local f0cf94dd0c5e host host local 465a31c55aa1 none null local ad1ff3d972e8 wordpress_net bridge local
已創建一個wordpress_net的網絡，在這個網絡模塊上創建一個容器，并指定ip
[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:5.7da497e56bd4b0f3434dd4f81534096574d167354dc508b657ceb390ba8e63771docker: Error response from daemon: User specified IP address is supported only when connecting to networks with user configured subnets.
提示了一個錯誤，若要配置ip，則需要給這個網絡指定一個subnet。所以重新搞一個網絡。
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": {} }]在給容器指定一個ip
[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:4.6096518d84419476f71647a8c70c91c3f336ef8772af50672b88a9c1fd7b3a719[root@vultrvpn conf.d]# docker ps -aCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES096518d84419 wordpress:4.6 "/entrypoint.sh apach" 47 seconds ago Up 47 seconds 0.0.0.0:8001->80/tcp my_vpn6d23ed99db20 wordpress:4.6 "/entrypoint.sh apach" About a minute ago Up About a minute 0.0.0.0:8000->80/tcp my_wordpressade42edf5a93 mysql:5.7 "docker-entrypoint.sh" 3 minutes ago Up 3 minutes 3306/tcp db_mysql
正常創建
查看網卡信息
[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": {} }]總結
以上就是這篇文章的全部內容了，希望本文的內容對大家能有所幫助，如果有疑問大家可以留言交流。
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