Bug 1278521

Summary: Netconsole cannot resolve the syslog server address if it is only included in the /etc/hosts file
Product: Red Hat Enterprise Linux 7 Reporter: Raul Mahiques <rmahique>
Component: initscriptsAssignee: David Kaspar // Dee'Kej <deekej>
Status: CLOSED ERRATA QA Contact: Leos Pol <lpol>
Severity: medium Docs Contact: Filip Hanzelka <fhanzelk>
Priority: medium    
Version: 7.3CC: deekej, jscotka, lnykryn, qe-baseos-daemons
Target Milestone: rcKeywords: Patch, Reproducer
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: initscripts-9.49.38-1.el7 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: 1278519 Environment:
Last Closed: 2017-08-01 07:29:01 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: 1278519, 1392766    
Bug Blocks: 1298243, 1393867    
Attachments:
Description Flags
Patch file, replaces command 'hosts' with 'getent' none

Description Raul Mahiques 2015-11-05 17:01:12 UTC 
Created attachment 1090295 [details]
Patch file, replaces command 'hosts' with 'getent'

+++ This bug was initially created as a clone of Bug #1278519 +++

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 Raul Mahiques 2016-02-26 15:05:56 UTC 
In the patch provided, please change the following:


-if ( grep -i 'IPV6INIT=yes' /etc/sysconfig/network &>/dev/null )
+if [ "$(</proc/sys/net/ipv6/conf/all/disable_ipv6)" == '0' ]
Comment 8 David Kaspar // Dee'Kej 2017-03-24 15:00:56 UTC 
*** Bug 1398675 has been marked as a duplicate of this bug. ***
Comment 13 errata-xmlrpc 2017-08-01 07:29:01 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://access.redhat.com/errata/RHBA-2017:2286