Bug 1278521 - Netconsole cannot resolve the syslog server address if it is only included in the /etc/hosts file
Summary: Netconsole cannot resolve the syslog server address if it is only included in...
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: initscripts
Version: 7.3
Hardware: All
OS: Linux
Target Milestone: rc
: ---
Assignee: David Kaspar // Dee'Kej
QA Contact: Leos Pol
Filip Hanzelka
: 1398675 (view as bug list)
Depends On: 1278519 1392766
Blocks: 1298243 1393867
TreeView+ depends on / blocked
Reported: 2015-11-05 17:01 UTC by Raul Mahiques
Modified: 2020-09-10 09:28 UTC (History)
4 users (show)

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.
Clone Of: 1278519
Last Closed: 2017-08-01 07:29:01 UTC
Target Upstream Version:

Attachments (Terms of Use)
Patch file, replaces command 'hosts' with 'getent' (750 bytes, patch)
2015-11-05 17:01 UTC, Raul Mahiques
no flags Details | Diff

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2017:2286 0 normal SHIPPED_LIVE initscripts bug fix and enhancement update 2017-08-01 11:26:43 UTC

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:

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.


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