Bug 1332412 – "/etc/resolv.conf" generated by dracut doesn't contain DNS passed via "nameserver=x.x.x.x"

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Bug 1332412 - "/etc/resolv.conf" generated by dracut doesn't contain DNS passed via "nameserver=x.x.x.x"

Summary:	"/etc/resolv.conf" generated by dracut doesn't contain DNS passed via "namese...

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	dracut (Show other bugs)
Sub Component:
Version:	7.3
Hardware:	Unspecified Linux

Priority	unspecified Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Lukáš Nykrýn
QA Contact:	Release Test Team
Docs Contact:

URL:
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Depends On:
Blocks:	1279685
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Reported:	2016-05-03 03:09 EDT by Xunlei Pang
Modified:	2017-01-25 11:59 EST (History)
CC List:	7 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-11-04 04:05:07 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHBA-2016:2530	normal	SHIPPED_LIVE	dracut bug fix and enhancement update	2016-11-03 10:17:01 EDT

Groups: None (edit)

Description Xunlei Pang 2016-05-03 03:09:10 EDT

Description of problem:
When passing kdump dns to dracut via "nameserver=x.x.x.x",
the dns provided didn't appear in the "/etc/resolv.conf".

Version-Release number of selected component (if applicable):
kexec-tools-2.0.7-38

How reproducible:

Steps to Reproduce:
1. In dhcp environment, pass DNS to dracut via nameserver=x.x.x.x" through "/proc/cmdline" or other ways like specified using directive DNS1/DNS2 in "/etc/sysconfig/network-scripts/ifcfg-<config>".

2. Configure /etc/kdump.conf to use network dump target(either nfs or ssh)
   Configure /etc/kdump.conf to enable "default shell". 
   kdumpctl restart

3. After crash, let the kdump progress fail(for example: shutdown remote network), then it will enter a shell. 

4. In the shell, "cat /etc/resolv.conf", and can't find the DNS passed in 1).

Actual results:


Expected results:
"/etc/resolv.conf" generated by dracut should contain those DNS items passed through "nameserver=x.x.x.x".

Additional info:

Comment 1 Xunlei Pang 2016-05-03 03:21:24 EDT

There is a patch("network: dhcp before parsing specified dns through cmdline") posted:
https://github.com/dracutdevs/dracut/compare/master...dracut-mailing-devs:1461665111-7385-2-git-send-email-xlpang%40redhat.com

Comment 4 Harald Hoyer 2016-07-21 05:05:21 EDT

https://errata.devel.redhat.com/advisory/24112

dracut-033.436.el7 already contains this patch

Comment 5 Marek Hruscak 2016-07-21 16:04:10 EDT

Reproduced on RHEL-7.2RC with dracut-033-359.

Comment 7 Marek Hruscak 2016-07-21 16:26:03 EDT

Side note: kernel panic was called by executing "kill -6 1" twice

Comment 10 errata-xmlrpc 2016-11-04 04:05:07 EDT

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2530.html

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