kubernetes/minikube

Host DNS search domain is not propagated to minikube DNS

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#1,676 建立於 2017年7月5日

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area/dnshelp wantedkind/featurelifecycle/frozenpriority/backlogr/2019q2

描述

Is this a BUG REPORT or FEATURE REQUEST? (choose one): BUG REPORT

Minikube version (use minikube version): v0.20.0

Environment:

  • OS (e.g. from /etc/os-release): Windows 7
  • VM Driver (e.g. cat ~/.minikube/machines/minikube/config.json | grep DriverName): virtualbox
  • ISO version (e.g. cat ~/.minikube/machines/minikube/config.json | grep -i ISO or minikube ssh cat /etc/VERSION): file://C:/cygwin64/home/b26978/.minikube/cache/iso/minikube-v0.20.0.iso
  • Install tools:
  • Others:

What happened: When I create a new minikube using minikube start the DNS configuration inside the minikube VM doesn't use the same DNS search domain as the host uses. I'm behind a corporate firewall and the proxy hostname isn't resolvable from inside the VM, thus the http_proxy and https_proxy settings are useless.

Apparently the DNS system is managed by systemd-resolved, and the configuration file at used is located at: /etc/systemd/resolved.conf. The Domains settings inside is commented in my configuration. I managed to get the DNS (and proxy) working by setting the Domains value in the /etc/systemd/resolved.conf and restarting the service:

systemctl daemon-reload
systemctl restart systemd-resolved

Sadly, I'm not fluent in Go and I'm not able to submit a patch to fix the issue.

What you expected to happen: The configuration file (/etc/systemd/resolved.conf) contains the Domains settings and it's set to the correct value.

How to reproduce it (as minimally and precisely as possible): Set the DNS domain search to something (non empty) under Windows 7. Create a new minikube vm using minikube start.

Anything else do we need to know:

貢獻者指南

技術棧
goshell
領域
backendinfrastructure
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Basic Go knowledgeUnderstanding of DNS configurationFamiliarity with systemdMinikube architecture
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
45
研究方向
Investigate how minikube configures DNS inside the VM, likely in the driver or provisioning code (e.g., pkg/minikube/cluster/cluster.go, pkg/minikube/drivers/virtualbox.go). Look for where /etc/systemd/resolved.conf is set or where DNS servers are applied. The goal is to propagate the host's DNS search domain to the VM's systemd resolved configuration. Check existing discussions in the issue comments for any pointers or partial solutions.