Pod无法安装软件包(apt-get更新或apt-get安装) [英] Pod unable to install packages(apt-get update or apt-get install )

问题描述

我观察到，将exec执行到pod时，群集中的pod无法安装软件包.调试时，我意识到它是由于/etc/resolv.conf 项引起的.

I have observed that the pods in my cluster is not able to install the packages when exec to the pod . While debugging i have realized that its due to /etc/resolv.conf entries.

其中一个Pod的/etc/resolv.conf 条目是:

The /etc/resolv.conf entry from one of the pod is :

nameserver 192.168.27.116
search ui-container.svc.cluster.local svc.cluster.local cluster.local 192.168.27.116.nip.io
options ndots:5

在这里，如果我从所有主节点，工作节点的resolv.conf中删除条目 192.168.27.116.nip.io ，则Pod将能够连接到Internet和-get update 和 apt-get install 起作用.这只是暂时的解决方法，因为不建议您更新resolv.conf.因为我已经观察到resolv.conf的内容在节点重启后重新设置为原始.

Here if i remove a entry 192.168.27.116.nip.io from the resolv.conf of all the master, worker nodes then the pods will be able to connect to internet and apt-get update and apt-get install works. This is only a temporary workaround because it is not recommended to update the resolv.conf. because i have observed that resolv.conf contents gets re-set to original upon reboot of the nodes.

是由于/etc/resolv.conf 中的 options ndots:5 吗?

我该如何解决?

推荐答案

作为一个快速解决方案，您可以利用pod Spec中的dnsConfig覆盖默认的dns配置，更多详细信息:

As a quick-fix, you could leverage dnsConfig from pod Spec to override default dns configuration, more details: https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-dns-config

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