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Bug 1278519

Summary: Netconsole cannot resolve the syslog server address if it is only included in the /etc/hosts file
Product: Red Hat Enterprise Linux 6 Reporter: Raul Mahiques <rmahique>
Component: initscriptsAssignee: David Kaspar // Dee'Kej <deekej>
Status: CLOSED ERRATA QA Contact: Jan Ščotka <jscotka>
Severity: medium Docs Contact: Clayton Spicer <cspicer>
Priority: medium    
Version: 6.8CC: deekej, lpol, peter.vreman
Target Milestone: rcKeywords: FastFix, Patch, Reproducer
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: initscripts-9.03.54-1 Doc Type: Release Note
Doc Text:
The *netconsole* utility now launches correctly Previously, if `nameserver` address lines were not present in the `/etc/resolv.conf` file, launching *netconsole* sometimes resulted in an error and *netconsole* did not start. The _initscripts_ package has been updated, and *netconsole* now starts correctly in this situation.
Story Points: ---
Clone Of:
: 1278521 1398675 (view as bug list) Environment:
Last Closed: 2017-03-21 11:52:18 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1269194, 1278521, 1356056, 1398675    
Attachments:
Description Flags
Patch file, replaces command 'hosts' with 'getent' none

Description Raul Mahiques 2015-11-05 16:59:35 UTC
Created attachment 1090294 [details]
Patch file, replaces command 'hosts' with 'getent'

Description of problem:
netconsole script fails if the syslog address is not available via a DNS server, this prevents netconsole to work with hosts that have not access to a DNS server and have the hostsnames hardcoded in /etc/hosts.
This applies for RHEL7 releases too

Version-Release number of selected component (if applicable):
Up to initscripts-9.49.24-1.el7

How reproducible:
Always


Steps to Reproduce:
1. Remove the nameserver lines from /etc/resolv.conf
2. add the syslog server IP and name to /etc/hosts
3. run the netconsole.
4. despite we can resolve the syslog server name it will fail with an missleading message:
"Server address not specified in /etc/sysconfig/netconsole'


Actual results:
"Server address not specified in /etc/sysconfig/netconsole'

Expected results:
Starts normally

Additional info:
A patch for this is provided

Comment 3 David Kaspar // Dee'Kej 2016-10-28 10:39:58 UTC
I have modified the patch from Raul, to avoid some possible issues in the future.

The patch has been submitted for review:
https://github.com/fedora-sysv/initscripts/pull/18

Comment 5 David Kaspar // Dee'Kej 2016-11-07 13:54:07 UTC
Commit accepted:
https://github.com/fedora-sysv/initscripts/commit/98037643411b5331a483d58

Comment 10 errata-xmlrpc 2017-03-21 11:52:18 UTC
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-2017-0786.html