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Docker-创建网络 create network

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自建bridge网络

查看local的网络信息：
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[root@docker ~]# docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
5133ec415c3c        bridge              bridge              local
f359ca4e2d39        host                host                local
8d68673c045c        none                null                local
创建网络

现在创建一个网络名为my_net且driver为bridge的网络:(默认创建的就是bridge)

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[root@docker ~]# docker network create my_net
67e29f0e4a77c79144efc337a081a889188b5b8e289968f22be6e4ddd9b80610
[root@docker ~]# docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
5133ec415c3c        bridge              bridge              local
f359ca4e2d39        host                host                local
67e29f0e4a77        my_net              bridge              local
8d68673c045c        none                null                local
#创建network，指定网段
[root@docker ~]# docker network create --driver bridge --subnet=172.21.0.0/16 my-network01

利用–network启动容器提供服务：

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[root@docker ~]# docker run -d --name=php --network my_net --network-alias php -v /www:/usr/local/nginx/html php
6b493cbe8207dee4cb4d5945cfce305dba96914083bd7f46841b0b42376bcb99
[root@docker ~]# docker run -d --name=nginx --network my_net --network-alias nginx -v /www:/usr/local/nginx/html -p 80:80 nginx
5ab220196b52bb768bef508433f0b920eecee70c3ee47880ebc5e2a74b5ee254

通过选项–network-alias将取名的my_net起了一个别名

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[root@docker ~]# docker exec -it nginx ping php
PING php (172.18.0.2) 56(84) bytes of data.
64 bytes from php.my_net (172.18.0.2): icmp_seq=1 ttl=64 time=0.079 ms
64 bytes from php.my_net (172.18.0.2): icmp_seq=2 ttl=64 time=0.090 ms
创建指定ip的网络
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[root@docker ~]# docker run -itd --name test01 --network my-network1 --ip 172.21.0.20 local/emqttd:v1
docker network命令详解
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[root@]# docker network --help
 
Usage:  docker network COMMAND
 
Manage networks
 
Options:
      --help   Print usage
 
Commands:
  connect     Connect a container to a network
  create      Create a network
  disconnect  Disconnect a container from a network
  inspect     Display detailed information on one or more networks
  ls          List networks
  prune       Remove all unused networks
  rm          Remove one or more networks
 
Run 'docker network COMMAND --help' for more information on a command.

docker network command –help 查看具体命令的详细参数和用法

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[root@]# docker network connect --help
 
Usage:  docker network connect [OPTIONS] NETWORK CONTAINER
 
Connect a container to a network
 
Options:
      --alias stringSlice           Add network-scoped alias for the container
      --help                        Print usage
      --ip string                   IP Address
      --ip6 string                  IPv6 Address
      --link list                   Add link to another container (default [])
      --link-local-ip stringSlice   Add a link-local address for the container

创建网络

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[root@izwz9fnxall7j07rfgkvwqz seafile]# docker network create --help
 
Usage:  docker network create [OPTIONS] NETWORK
 
Create a network
 
Options:
      --attachable             Enable manual container attachment # 允许手动附加到容器
      --aux-address map        Auxiliary IPv4 or IPv6 addresses used by Network driver (default map[])
  -d, --driver string          Driver to manage the Network (default "bridge")
      --gateway stringSlice    IPv4 or IPv6 Gateway for the master subnet
      --help                   Print usage
      --internal               Restrict external access to the network
      --ip-range stringSlice   Allocate container ip from a sub-range
      --ipam-driver string     IP Address Management Driver (default "default")
      --ipam-opt map           Set IPAM driver specific options (default map[])
      --ipv6                   Enable IPv6 networking
      --label list             Set metadata on a network (default [])
  -o, --opt map                Set driver specific options (default map[])
      --subnet stringSlice     Subnet in CIDR format that represents a 
segment

比如 docker network create lzwj 网络默认采用桥接网络
docker network ls
[root@seafile]# docker network ls
NETWORK ID NAME DRIVER SCOPE
62180a9e2a6f bridge bridge local
d80fef8de8ba host host local
6a5ad5bc599c lzwj bridge local
macvlan与bridge模式区别

在实践开发中经常使用macvlan与bridge模式，他俩的区别如下：

macvlan模式可以将各个容器的ip地址设置为与宿主机同一个网段的地址，这样每个容器就是独立的ip，其他宿主机或其他宿主机里的容器都可以通过ip进行互访，但是宿主机不能同该宿主机里的容器进行访问。

bridge模式可以将各个容器的端口设为对立的，这样外部宿主机或者容器需要通过该容器所在ip+该容器的端口进行访问，并且本宿主机可以访问本宿主机中的容器。

总结：macvlan模式通过独立的ip进行区分访问，bridge模式通过独立的端口进行区分访问。