[Nagiosplug-devel] check_mysql should support aommand line option for a MySQL defaults file
Brian A. Seklecki
lavalamp at spiritual-machines.org
Sun Nov 26 02:54:11 CET 2006
That patch was "relatively recent" given Nagios releng schedule:
Revision 1.27 - (view) (download) (annotate) - [select for diffs]
Thu Oct 13 09:55:31 2005 UTC (13 months, 1 week ago) by seanius
Branch: MAIN
Changes since 1.26: +4 -2 lines
Diff to previous 1.26
check mysql now reads [client] defaults from my.cnf (debian bug #278817)
---
But it's good to see it in there. Thank you. I guess the surprising
thing here is that you have to tell libmysql manually to use ~/.my.cnf.
With most libraries (OpenLDAP, PostgreSQL come to mind), it's the exact
opposite.
I don't know much about Gentoo, but it sounds like they need to implment
some RC mechanisms similar NetBSD/FreeBSD RCNG as featured in rc.subr(8)
where you can simplify delcare $servicename_user="foo" and it will
appropriately exec the command under "su -m sh -c '$start_command'":
$ egrep -B 3 -i -- "su -" /etc/rc.subr
${_nice:+nice -n $_nice }\
$command $rc_flags $command_args"
if [ -n "$_user" ]; then
_doit="su -m $_user -c 'sh -c \"$_doit\"'"
That way the RC has a uniform method and each script doesn't have to play
guesswork on alt user exec, chroot(8), and privsep services.
Another option is a shared RC subroutine that utilized sudo(8) if you
maintain it in-tree as part of base distro.
~BAS
On Sat, 25 Nov 2006, Wolfram Schlich wrote:
> * sean finney <seanius at seanius.net> [2006-11-24 20:53]:
>> On Fri, 2006-11-24 at 12:33 -0500, Brian A. Seklecki wrote:
>>> Yea it's always been beyond my belief why/if/that check_mysql doesn't
>>> honor ~nagios/.my.cnf. I remember the pain clearly. Vivid.
>>
>> doesn't it do so now?
>>
>> <snip>
>> /* initialize mysql */
>> mysql_init (&mysql);
>>
>> mysql_options(&mysql,MYSQL_READ_DEFAULT_GROUP,"client");
>> <snip>
>
> Yes, it does. But there is a problem with it :)
>
> On Gentoo, the init script runs start-stop-daemon to start the nagios
> daemon as user 'nagios', which is fine. But the nagios daemon
> does not get the 'right' HOME environment variable, the home of the
> user nagios for example, but instead HOME=/root.
>
> So, I patched the init-script to add '-e HOME=/var/nagios' to the
> start-stop-daemon call. Now, check_mysql (and others) get the
> correct HOME and are able to use ~/.whatever files.
> --
> Wolfram Schlich
>
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l8*
-lava (Brian A. Seklecki - Pittsburgh, PA, USA)
http://www.spiritual-machines.org/
"...from back in the heady days when "helpdesk" meant nothing, "diskquota"
meant everything, and lives could be bought and sold for a couple of pages
of laser printout - and frequently were."
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