在码头工厂使用HOST和NONE网络是什么？ [英] what is the use of HOST and NONE network in docker?

问题描述

尝试了解码头网络，Docker自动创建以下网络：

Trying to understand the docker networks, Docker creates the following networks automatically:

# docker network ls 
NETWORK ID          NAME                DRIVER              SCOPE
67b4afa88032        bridge              bridge              local               
c88f997a2fa7        host                host                local               
1df2947aad7b        none                null                local               

我了解，桥接网络代表所有Docker安装中存在的docker0网络，参考链接

I understood that the bridge network represents the docker0 network present in all Docker installations, referring from the link.

有人可以帮助我了解其他网络，主机和 none ，如果可能，使用示例。

Can someone help me in understanding other networks, host and none, If possible with examples.

推荐答案

Docker由默认支持3个网络：

1）无：

此模式不会为容器配置任何IP 和无法访问外部网络以及其他容器。它具有回送地址，可用于运行批处理作业。

This mode will not configure any IP for the container and doesn’t have any access to the external network as well as for other containers. It does have the loopback address and can be used for running batch jobs.

# docker run -it --network=none ubuntu:14.04 /bin/bash
root@66308c6686be:/# ifconfig
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:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

# 
# docker inspect 66308c6686be | grep -i ipaddr
            "SecondaryIPAddresses": null,
            "IPAddress": "",
                    "IPAddress": "",

2）主机

在这种模式下，容器将共享主机的网络堆栈和来自主机的所有接口将可用于容器。容器的主机名将与主机系统上的主机名匹配。

In this mode container will share the host’s network stack and all interfaces from the host will be available to the container. The container’s host name will match the host name on the host system

# docker run -it --net=host ubuntu:14.04 /bin/bash
root@labadmin-VirtualBox:/# hostname
labadmin-VirtualBox

即使IP配置与主机系统的IP
配置相同

Even the IP configuration is same as the host system's IP configuration

root@labadmin-VirtualBox:/# ip addr | grep -A 2 eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 08:00:27:b5:82:2f brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
       valid_lft forever preferred_lft forever
3: lxcbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default 
root@labadmin-VirtualBox:/# exit
exit

HOST SYSTEM IP CONFIGURATION

# ip addr | grep -A 2 eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 08:00:27:b5:82:2f brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
       valid_lft forever preferred_lft forever
3: lxcbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default 

在主机和无模式下都没有直接配置，但默认网桥可以配置以及创建自己的用户定义的桥网络。

In host and none mode are not configured directly but default bridge network can be configured as well as create your own user-defined bridge networks.

3）桥接模式

这是模式，这将启用与主机的其他接口以及容器之间的连接。

It is the Docker default networking mode which will enable the connectivity to the other interfaces of the host machine as well as among containers.

# docker run -it --network=bridge ubuntu:14.04 /bin/bash
root@58b0b1f18b2e:/# ifconfig
eth0      Link encap:Ethernet  HWaddr 02:42:ac:11:00:0c  
          inet addr:172.17.0.12  Bcast:0.0.0.0  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:16 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:2668 (2.6 KB)  TX bytes:0 (0.0 B)

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:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

在桥模式下可以访问其他容器。

Accessibility to other containers is possible in bridge mode.

root@58b0b1f18b2e:/# ping 172.17.0.11
PING 172.17.0.11 (172.17.0.11) 56(84) bytes of data.
64 bytes from 172.17.0.11: icmp_seq=1 ttl=64 time=0.143 ms
64 bytes from 172.17.0.11: icmp_seq=2 ttl=64 time=0.050 ms

连接外部网络。

Connectivity to external network.

root@58b0b1f18b2e:/# ping google.com 
PING google.com (216.58.197.46) 56(84) bytes of data.
64 bytes from maa03s20-in-f46.1e100.net (216.58.197.46): icmp_seq=1 ttl=51 time=16.9 ms

与主机的连接

Connectivity to host machine

root@labadmin-VirtualBox:~# ip a | grep eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0

root@58b0b1f18b2e:/# ping 10.0.2.15
PING 10.0.2.15 (10.0.2.15) 56(84) bytes of data.
64 bytes from 10.0.2.15: icmp_seq=1 ttl=64 time=0.113 ms

与这些码头服务商一起提供了 MACVLAN 网络，允许配置单个物理接口上的多个二层（MAC）地址。

Along with these docker provides MACVLAN network which allows to configure multiple Layer 2(MAC) addresses on a single physical interface.

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