Docker DNS设置 [英] Docker DNS settings

问题描述

我尝试使用自定义网络和dos设置创建docker容器。

I try create docker container with custom network and dos settings.

docker network create --driver = bridge --opt com.docker.network.bridge.enable_ip_masquerade = true- opt com.docker.network.bridge.enable_icc = true --opt = com.docker.network.driver.mtu = 1500 --opt = com.docker.network.bridge.host_binding_ipv4 = 0.0.0.0净

docker network create --driver=bridge --opt "com.docker.network.bridge.enable_ip_masquerade"="true" --opt "com.docker.network.bridge.enable_icc"="true" --opt="com.docker.network.driver.mtu"="1500" --opt="com.docker.network.bridge.host_binding_ipv4"="0.0.0.0" net

-

docker run --dns 10.0.0.2 --network = net busybox cat /etc/resolv.conf

docker run --dns 10.0.0.2 --network=net busybox cat /etc/resolv.conf

名称服务器127.0。 0.11
选项ndots：0

nameserver 127.0.0.11 options ndots:0

否则，如果我使用标准网络，一切都可以正常工作

Else if I use standard network all work fine

docker run --dns 10.0.0.2 --network = bridge busybox cat /etc/resolv.conf

docker run --dns 10.0.0.2 --network=bridge busybox cat /etc/resolv.conf

名称服务器10.0.0.2

nameserver 10.0.0.2

推荐答案

从Docker 1.10开始，对于用户定义的网络，DNS的管理方式有所不同。默认桥网络的DNS保持不变，以实现向后兼容。在用户定义的网络中，泊坞窗守护程序使用嵌入式DNS服务器。根据此处找到的文档：

As of Docker 1.10, DNS is managed differently for user-defined networks. DNS for the default bridge network is unchanged for backwards compatibility. In a user-defined network, docker daemon uses the embedded DNS server. According to the documentation found here:

https://docs.docker.com/engine/userguide/networking/configure-dns/

--dns=[IP_ADDRESS...]   The IP addresses passed via the --dns option is used by the embedded 
                        DNS server to forward the DNS query if embedded DNS server is unable
                        to resolve a name resolution request from the containers. These 
                        --dns IP addresses are managed by the embedded DNS server and will not
                        be updated in the container’s /etc/resolv.conf file.

因此，将使用DNS名称服务器，只是在容器的/ etc / resolv中不可见.conf。

So, the DNS nameserver will be used, it just is not visible in the container's /etc/resolv.conf.

这篇关于Docker DNS设置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！