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Powershell Client - removing test
by BDale＠kitchengroup.com.au 11 Mar '15

11 Mar '15

1. I am testing the PowerShell client and I would like to remove the msgs column and not have it check that There is documentation for the powershell client here http://sourceforge.net/p/xymon/code/HEAD/tree/sandbox/WinPSClient/ To stop it checking events you would use <reportevt>0</reportevt> in the xymonclient_config.xml file that is stored on the machine you are monitoring. 2. Also, how would I set it to monitor a service? This isn't specific to the powershell client but you would specifiy this in the analysis.cfg file in xymon possibly something like HOST=SQL01 SVC MSSQLSERVER status=started startup=automatic More info on that here: https://www.xymon.com/help/manpages/man5/analysis.cfg.5.html SVCS status (Microsoft Windows clients) SVC servicename status=(started|stopped) [startup=automatic|disabled|manual] The PowerShell client also appears to have its own servicecheck option I haven't actually tried it but I think it's only for starting a stopped service rather than alerting on it. Which may be even better depending on your needs. Regards, Brandon

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Powershell Client - removing test
by Russell.Blumenthal＠stonybrookmedicine.edu 11 Mar '15

11 Mar '15

Hey folks, Perhaps I missed this if it was mentioned in another email. I am testing the PowerShell client and I would like to remove the msgs column and not have it check that. How would I do that? Also, how would I set it to monitor a service? Thanks This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by e-mail and destroy all copies of the original.

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Detecting read-only file system in Linux
by spah＠syntec.co.uk 11 Mar '15

11 Mar '15

Hi, I have been trying to find out if there is a way of Xymon detecting that a file-system in Linux has gone read-only as a result of a disk error (other than reporting it just the once via monitoring /var/log/messages). Nothing is showing up in my Xymon server, but my xymon-client is a bit old: xymon-client-4.3.7-26.1.el5.tnt I did a bit of Googling and I came up with these two links that may be relevant: http://sisyphus.ru/en/srpm/Sisyphus/xymon/sources/8 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=764197 It seems that a RPM maintainer may have made some modifications to their version in order to catch disks in a read-only state (in the first link) and that there is mount-ro plugin that is part of the hobbit-plugins package in Debian / Ubuntu. Does anyone have more information on either of these and whether any patches can be integrated upstream or plug-ins added to xymonton? CCing Axel Beckert as he seems to have committed something to the mount-ro plugin recently: https://www.openhub.net/p/hobbit-plugins/commits Although we have some Debian systems, I was looking for a solution for another Linux distro. If I was to write something myself to do it, I would check /proc/mounts and the best command I could find was: awk '$4~/(^|,)ro($|,)/' /proc/mounts which outputs: /dev/root / ext3 ro,data=ordered 0 0 with sample line: /dev/root / ext3 ro,data=ordered 0 0 This command also produced a nice summary output that might be good to have on a Xymon status page: cat /proc/mounts|sort|awk '{print $1 "\011" toupper(substr($4,0,2) The following was at the bottom of /var/log/messages, but it does not suggest any very obvious alarm strings to add other than the last line without the 'dm-0', but it would be nicer to have something more generic still as textual messages can change between different versions of the O/S. kernel: sd 0:0:0:0: Unhandled sense code kernel: sd 0:0:0:0: SCSI error: return code = 0x08100002 kernel: Result: hostbyte=invalid driverbyte=DRIVER_SENSE,SUGGEST_OK kernel: sda: Current: sense key: Hardware Error kernel: Add. Sense: Defect list error kernel: kernel: Buffer I/O error on device dm-0, logical block 1358756 kernel: lost page write due to I/O error on dm-0 Kind regards, SebA

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rrd logs and graphs
by jlaidman＠rebel-it.com.au 11 Mar '15

11 Mar '15

Yes, apparently, "(null)" is what GNU's printf outputs when asked to print a string pointer that is null. The POSIX behaviour is not defined, and so in some systems, it dumps core rather than detecting the illegal string. This bit of code demonstrates: #include <stdio.h> int main() { printf("test: %s\n",NULL); } On Linux and FreeBSD, this prints out "test: (null)" but on Solaris 10 this dumps core. Fixing this is beyond my skill level. But I would start looking at the functions errprintf() and dbgprintf() to see if NULL strings can be detected and prevented from being passed through to *printf. But that might be somewhat tricky. Alternatively, updating dump_tcp_services() to do the same, is probably a much simpler task, but doesn't safeguard any other code from the same fate. J On 11 March 2015 at 17:38, Jeremy Laidman <jlaidman at rebel-it.com.au> wrote: > Even simpler: > > #include <stdio.h> > int main() { > printf("test: %s\n",NULL); > } > > > > On 11 March 2015 at 17:33, Jeremy Laidman <jlaidman at rebel-it.com.au> > wrote: > >> On 11 March 2015 at 15:43, Vernon Everett <everett.vernon at gmail.com> >> wrote: >> >>> We have 4.3.12 >>> And the command dumps core in the same way. >>> >> >> That's good. >> >> Can you try this out? Plop into a text file, eg test.c, then "make test" >> and then "./test". >> >> #include <stdio.h> >> #include <stdarg.h> >> void dbgprintf(const char *fmt, ...) >> { >> va_list args; >> va_start(args, fmt); >> vfprintf(stdout, fmt, args); >> va_end(args); >> fflush(stdout); >> } >> int main() { >> dbgprintf("test: %s\n",NULL); >> } >> >> This is the essence of the Xymon code that prints the empty send/expect >> strings. But I've pared away all of the Xymon code to leave just the call >> to vprintf() and whatever is needed to make it run. >> >> On my systems I get the following output: >> >> test: (null) >> >> I'm guessing on your system you'll get a core dump. If so, it would >> suggest a difference in implementations of the standard library functions. >> If that's the case, we simply (!) need to catch the attempts to print NULL >> pointers, and substitute our own "(null)" string. >> >> Indeed, I just tested this on a Solaris system and it dumped core. On >> Linux and FreeBSD systems, it printed "(null)". >> >> J >> >> >

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CRONDATE on 4.3.7
by jlaidman＠rebel-it.com.au 11 Mar '15

11 Mar '15

On 11 March 2015 at 07:18, usa ims via Xymon <xymon at xymon.com> wrote: > If the patch will fix it, how do I go about patching my xymon > client/server that was installed via 'apt-get install'? > You run "apt-get upgrade <packagename>". The patch is only useful if you're compiling the source code. If you do that, you will want to remove the package so it doesn't conflict or cause confusion. J

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CRONDATE on 4.3.7
by usaims＠yahoo.com 10 Mar '15

10 Mar '15

I have heard there are issues with 'CRONDATE' on version 4.3.7 on a Linux ubuntu client. My issues is that if I use CRONDATE instead of INTERVAL, it won't obey my settings. No matter what settings I use, it runs the test ever 5 seconds.Here is my settings: [xxxxx] ENVFILE $HOBBITCLIENTHOME/etc/hobbitclient.cfg CMD $HOBBITCLIENTHOME/ext/xxxx.pl LOGFILE $HOBBITCLIENTHOME/logs/xxxx.log CRONDATE 16 2 * * * There is a patch for a CRONDATE fix but I don't know if the patch will fix it. http://sourceforge.net/p/xymon/mailman/message/28718513/ If the patch will fix it, how do I go about patching my xymon client/server that was installed via 'apt-get install'? Thanks in advance. usaims

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Symbolic link error
by fairwayshateme＠gmail.com 10 Mar '15

10 Mar '15

Hi everyone, I've looked all over the place and I just cannot figure out why I'm getting this error: Symbolic link not allowed or link target not accessible: /home/xymon/cgi-bin/svcstatus.sh, referer: http://home.com/xymon/allservers/allservers.html Here is part of what my xymon-apache.conf looks like: Alias /xymon "/home/xymon/server/www" <Directory "/home/xymon/server/www"> Options Indexes FollowSymLinks Includes MultiViews Order allow,deny Allow from all </Directory> ScriptAlias /xymon-cgi/ "/home/xymon/cgi-bin/" <Directory "/home/xymon/cgi-bin"> AllowOverride None Options ExecCGI Includes Order allow,deny Allow from all </Directory> ScriptAlias /xymon-seccgi/ "/home/xymon/cgi-secure/" <Directory "/home/xymon/cgi-secure"> AllowOverride None Options ExecCGI Includes Order allow,deny Allow from all Any help/handouts/hints would be very helpful! Dave

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Sendmail Monitoring
by Nick＠pettefar.com 10 Mar '15

10 Mar '15

Hi, is there an Xymon addon to monitor e-mail traffic on Sendmail servers? Would like to see graphs of sent and rejected e-mails on a daily basis if possible. Regards, Nick Pettefar

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Resources for xymon
by aleskrek＠yahoo.com 10 Mar '15

10 Mar '15

I want to monitor about 1000 devices. So i want to know how much resources i need (CPU, HDD and RAM)? Thank you! Aleš Krek

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Macro confusion
by scoile＠mcclatchyinteractive.com 06 Mar '15

06 Mar '15

Given two different, but trivial alerts.cfg files: --- file 1 --- $H=HOST=a,b SERVICE=conn $H --- file 2 --- $H=HOST=a,b $H SERVICE=conn --- The first file will match hosts a and b but not c; the second file will match nothing. Take "SERVICE=conn" out of file 2, it then properly matches a and b but not c. What gives? -- *Steve Coile*Senior Network and Systems Engineer, McClatchy Interactive <http://www.mcclatchyinteractive.com/> Office: 919-861-1247 | Mobile: 919-622-5369 | Fax: 919-861-1300

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