<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 12 (filtered medium)"> <style>  </style>  </head> <body lang=DE link=blue vlink=purple> <div class=Section1> Hi Jason,<o:p></o:p> <o:p> </o:p> I tried the following perl code as plugin and worked for me.<o:p></o:p> <div style='mso-element:para-border-div;border-top:solid windowtext 1.0pt; border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none; padding:1.0pt 0cm 1.0pt 0cm'> <o:p> </o:p> #!/usr/bin/perl<o:p></o:p> <o:p> </o:p> open L,">>/tmp/ssh_check.log" or die "Can't open log";<o:p></o:p> <o:p> </o:p> print L "perl check..\n";<o:p></o:p> print L scalar localtime(),"\n" ;<o:p></o:p> my $string =`/usr/bin/ssh -n -i /var/log/nagios/id_nagios_rsa root\@EXAMPLE.COM uname -a`;<o:p></o:p> print L $string;<o:p></o:p> <o:p> </o:p> close L;<o:p></o:p> <o:p> </o:p> print "Check done";<o:p></o:p> <o:p> </o:p> exit 0;<o:p></o:p> </div> <o:p> </o:p> May be:<o:p></o:p> <o:p> </o:p> <![if !supportLists]>1) <![endif]>Embedded perl? In nagios 3.x you can disable easily<o:p></o:p> <![if !supportLists]>2) <![endif]>OR the Net::SSH:Perl module, to be honest I’ve never used it and is not installed on my test system.<o:p></o:p> <o:p> </o:p> Hope you find the problem soon.<o:p></o:p> <o:p> </o:p> Regards,<o:p></o:p> <o:p> </o:p> Badri<o:p></o:p> <o:p> </o:p> <div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'> Von: Jason [mailto:daelic@gmail.com] Gesendet: Mittwoch, 26. November 2008 21:47 An: Nagios Developers List Betreff: Re: [Nagios-devel] Perl EVENT HANDLER SSH Remote Command Exection<o:p></o:p> </div> <o:p> </o:p> Ok, I've re-tooled, using more simplified logic for the purpose of testing the SSH connection. The script now has no logic, it just attempts to ssh to the remote host and run /usr/bin/uname -a.<o:p></o:p> <div> <o:p> </o:p> </div> <div> I've also explicitly defined my SSH key.<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> As before, the script works perfectly when run manually as nagios user via the command line, but fails at the SSH call when executed via event handler from the nagios daemon.<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> I'm beginning to wonder if Nagios & Net::SSH::Perl simply do not play nice with each other.<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> I've attached my simplified script if anyone wants to see the exact code in full context.<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> <div> On Wed, Nov 26, 2008 at 10:26 AM, Jason <<a href="mailto:daelic@gmail.com">daelic@gmail.com</a>> wrote:<o:p></o:p> Yes, I am using public key authentication. It works fine when I run the script manually from the command prompt under the Nagios user, just not when the script is launched via nagios.<o:p></o:p> <div> <o:p> </o:p> </div> <div> Combining your reply with the reply from Sascha Runschke, I'm wondering if it's not finding $HOME/.ssh due to the environment being stripped down. I'm going to try explicitly defining my private key.<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> I did put in full paths to my remote commands, and that did not resolve the problem.<o:p></o:p> <div> <div> <o:p> </o:p> <div> On Tue, Nov 25, 2008 at 11:34 PM, Badri Pillai <<a href="mailto:badri@diglinks.com" target="_blank">badri@diglinks.com</a>> wrote:<o:p></o:p> Hi Jason, I assume you are using public key authentication. If yes, I don't see ssh key to be used being passed as argument, cause the key files are searched by default in "$HOME/.ssh" may be this directory is not accessible for the server? Other options to check -> if you need a " pty?? or not. Regards, BP<o:p></o:p> <div> <div> Jason wrote: > Hello, > I've written an Event Handler using Perl. The intent is to verify on the > remote box that we do need to restart the daemon in question, and then > perform a restart if needed. > > The script works perfectly via the command line when I execute it as the > nagios user. Unfortunately, if the script doesn't work properly when it is > executed by nagios in response to a state change. It dies before completion. > > I've put in various hooks (Basicly just made it send me an email at various > stages of the script) to determine exactly where it dies, and have isolated > it. Here is the portion that causes the script to die when nagios executes > it. (Please trust me and assume that $hostname and $username contain proper > values. I've tested the variables extensively to insure that they are being > populated.) > > If I run the below, I'll see a log entry and an email for Step 1, but > nothing for Step 2 and beyond. > > #!/usr/bin/perl > require '/usr/local/scripts/subs.pl'; > > report_findings("Step 1","."); > my $command = "grep check_tacplus /usr/local/nagios/etc/nrpe.commands"; > my %tac_expected = run_command($command, $hostname, $username); > report_findings("Step 2","."); > > sub run_command { > my $command = $_[0]; > my $host = $_[1]; > my $username = $_[2]; > > my %result = SSHexec($command, $hostname, $username); > if ($result{'err'}) { > my $subject = "Automated refreshtac failed on $hostname"; > my $message = "Error when attempting SSH connection to > $hostname:\n"; > $message .= " ".$result{'err'}."\n"; > report_findings($subject, $message, $recipients); > exit; > } > return %result; > } > > sub SSHexec { > use Net::SSH::Perl; > > my $CMD = $_[0]; > my $HOST = $_[1]; > my $USR = $_[2]; > my %RESULT; > > if (pingHost($HOST)) { > %RESULT = ("err", "Connectivity Failure"); > return %RESULT; > } > > my $ssh = Net::SSH::Perl->new($HOST, options => [ "protocol '2,1'" > ]); > unless ($ssh->login($USR)) { > %RESULT = ("err", "Authentication Failure"); > return %RESULT; > } > my ($out,$err,$exit) = $ssh->cmd($CMD); > %RESULT = ("out", $out, > "err", $err, > "exit", $exit); > return %RESULT; > } > > &report_findings is nothing but a wrapper for logging and sending email. > This works up until the SSH call. > > &SSHexec is contained in /usr/local/scripts/subs.pl which holds common > subroutines that I use frequently when writing scripts. I use other subs > from there, so I know it's getting loaded. > > I cannot figure out why this is working as an automation, when it works > perfectly otherwise. Any advice/hints/suggestions? > ><o:p></o:p> </div> </div> > ------------------------------------------------------------------------<o:p></o:p> <div> <div> > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > <a href="http://moblin-contest.org/redirect.php?banner_id=100&url=/" target="_blank">http://moblin-contest.org/redirect.php?banner_id=100&url=/</a> > ------------------------------------------------------------------------ > > _______________________________________________ > Nagios-devel mailing list > <a href="mailto:Nagios-devel@lists.sourceforge.net" target="_blank">Nagios-devel@lists.sourceforge.net</a> > <a href="https://lists.sourceforge.net/lists/listinfo/nagios-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-devel</a> > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world <a href="http://moblin-contest.org/redirect.php?banner_id=100&url=/" target="_blank">http://moblin-contest.org/redirect.php?banner_id=100&url=/</a> _______________________________________________ Nagios-devel mailing list <a href="mailto:Nagios-devel@lists.sourceforge.net" target="_blank">Nagios-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-devel</a><o:p></o:p> </div> </div> </div> <o:p> </o:p> </div> </div> </div> </div> <o:p> </o:p> </div> </div> </body> </html>