Docker无法访问.local域

时间:2019-01-10 16:46:28

标签: docker

我正在尝试使用.local域访问网络上的设备,但在Docker中似乎无法使用。

来自主机的Ping正在工作:

$ ping test1.local
PING test1.local (192.168.1.90) 56(84) bytes of data.
64 bytes from 192.168.1.90 (192.168.1.90): icmp_seq=1 ttl=255 time=1.41 ms
64 bytes from 192.168.1.90 (192.168.1.90): icmp_seq=2 ttl=255 time=1.54 ms

Docker恶魔配置:

$ cat /etc/docker/daemon.json 
{
    "dns": ["192.168.1.1","8.8.8.8"]
}

如果我尝试从Docker ping test1.local:

$ sudo docker run --network host busybox ping -c 3 test1.local
ping: bad address 'test1.local'

具有IP功能的Ping设备:

$ sudo docker run --network host busybox ping -c 3 192.168.1.90
PING 192.168.1.90 (192.168.1.90): 56 data bytes
64 bytes from 192.168.1.90: seq=0 ttl=255 time=4.855 ms
64 bytes from 192.168.1.90: seq=1 ttl=255 time=1.566 ms

所以我认为名称解析错误。

madrian@ubuntudev:~$ cat /etc/resolv.conf 
$ cat /etc/resolv.conf 
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.

nameserver 127.0.0.1
search localdomain

有什么办法解决此问题吗?

1 个答案:

答案 0 :(得分:0)

尝试运行您的代码 --network host参数。问题出在DNS解析中。

当您使用default bridge(如果省略network参数时将使用)时,容器将从主机继承DNS配置,这就是您所需要的: https://docs.docker.com/v17.09/engine/userguide/networking/default_network/configure-dns/

当您使用user-defined bridge时,Docker将更新DNS记录,以按其名称启用容器之间的无缝通信: https://docs.docker.com/v17.09/engine/userguide/networking/configure-dns/

不幸的是,我无法找到有关DNS如何在host模式下工作的明确解释,所以我认为这是一个问题