Cloud Platforms- sudo:无法解析主机 [英] Cloud Platforms- sudo: unable to resolve host

问题描述

我将linux用于Amazon-EC2和openstack上的基于云的服务器. 尝试运行时:

I use linux for my cloud based servers on Amazon-EC2 and openstack. When trying to run:

sudo chhown ubuntu somepath

我偶尔会收到此错误:

sudo:无法解析主机

sudo: unable to resolve host

Internet上对该问题的大多数答案是编辑/etc/hosts文件.

Most answers to this question on the internet are to edit the /etc/hosts file.

但是，我会自动部署服务器.除此之外，我没有使用"localhost"登录，而是使用了我的AWS公共DNS:

However, I deploy my servers automatically. besides that, I am not logging on using "localhost", but rather my AWS public DNS:

ssh -i mykey.pem [e-mail]

所以我不能只是简单地插入localhost，更不用说重置机器后我的IP可以更改了. (不想为每台服务器浪费"我宝贵的浮动IP)

So I cannot just trivially insert localhost, not to mention that my IP can change after I reset my machine. (Don't want to "waste" my precious floating IPs for every server)

此外，我一次部署了数十台服务器，所以我负担不起编辑文本文件的手动步骤.是否有针对此问题的自动修复程序? 最近，我开始使用openstack，那里也存在这个问题.

Also, I deploy tens of servers at a time, so I cannot afford the manual step of editing a text file. Is there an automated fix for this issue? Recently I've started using openstack, and the issue is present there too.

推荐答案

EC2实例才能正确解析其自动分配的内部主机名.您需要:

EC2 instances inside VPC will resolve their auto-assigned internal hostnames correctly, only if you configure the VPC correctly. You need:

DNS hostnames: yes
DNS resolution: yes

http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide /vpc-dns.html

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