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Full Discussion: Daily health check script
Top Forums Shell Programming and Scripting Daily health check script Post 302691533 by methyl on Friday 24th of August 2012 06:36:09 PM
Old 08-24-2012
Let's pick one of the tests and assume that OutputW and OutputOK are other scripts or local functions.

Quote:
if [ `ioscan -fnC disk |wc -l` != 1 ]
then
if [ `ioscan -fnC disk |grep CLAIMED|wc -l` != `ioscan -fnC disk |grep NO_HW|wc -l` ]
then
outputW "Disks: Not CLAIMED disks detected."
else
outputOK "Disks: All Disks are CLAIMED"
fi
else
outputOK "Disks: No Disks found."
fi
There is a basic logic error here. The main condition does not work unless perhaps there is only ever one disk on a HP-UX system! Not sure about the syntax either.
We should run ioscan only once because it is a very powerful program and can cause the view to change. Be aware that running ioscan can cause dead hardware to completely disappear from the inventory (and therefore not show as NO_HW).
Let's try something lke this (untested and purely to demonstrate logic and not recommended).

Code:
ioscan -fnC disk > /tmp/ioscan_fnC_disk # Store output from ioscan
total_count=$(egrep "CLAIMED|NO_HW" ioscan_fnC_disk|wc -l)
dead_count=$(grep "NO_HW" ioscan_fnC_disk|wc -l)
if [ ${total_count} -eq  0 ]
then
        outputW "Disks: No Disks found."
else
        if [ ${dead_count} -gt 0 ]
        then
              outputW "Disks: Not CLAIMED disks detected."
        else
              outputOK "Disks: All Disks are CLAIMED"
        fi
fi
rm -f ioscan_fnC_disk # Clean up workfile

On my systems I run ioscan -fn (i.e. all hardware) daily and compare this output with the output from the same command yesterday. No attempt to predict every possible error output from ioscan. If there are differences, this is reported as a major error. Obviously if you detect a failure and repair it you will get one false alert for the broken hardware re-appearing.
I started doing this after discovering that a major hardware failure can cause a crash and reboot during which the dead hardware can completely and silently disappear from the ioscan inventory.
That reminds me. Don't forget to have a script to read the syslog and identify anything abnormal (and I don't mean broken printers).
Last edited by methyl; 08-24-2012 at 07:44 PM.. Reason: minor typos
This User Gave Thanks to methyl For This Post:
fretagi
 

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LEARN ABOUT OSF1

uudemon

uudemon(4)						     Kernel Interfaces Manual							uudemon(4)

NAME

       uudemon.admin,  uudemon.cleanu,	uudemon.hour,  uudemon.poll  -	Administrative shell scripts for polling remote systems, cleaning up spool
       directories, reporting status to the system administrator, and routine invocations of the uuxqt and uusched daemons

SYNOPSIS

       These shell scripts reside in the following directory:
	  /usr/lib/uucp

DESCRIPTION

       All the scripts can be run from the command line or can be run automatically by the cron daemon. To automatically run the  scripts,  remove
       the comment character (#) from the beginning of the relevant line in the /var/spool/cron/crontabs/uucp file.

       This  script  reports  status  to  the system administrator. It issues the uustat command to find out the status of uucp jobs. It mails the
       results to the uucp login ID. The script may be modified to send mail to any login ID such as the uucp administrative login ID  (uucpa)	or
       root.  This script cleans up the /var/spool/uucp and /var/spool/uucppublic directories by running the uucleanup command. The uucleanup com-
       mand is run with the following parameters: -C7, -D7, X2, -o2, -W1.  This script runs the uusched and uuxqt daemons in the background.  This
       script  polls  the  systems  listed  in	the  /usr/lib/uucp/Poll file.  The uudemon.poll script should be scheduled before the uudemon.hour
       script. This allows uudemon.poll to create any command files before cron runs the uudemon.hour script.

FILES

       Contains the uudemon.admin, uudemon.cleanu, uudemon.hour and uudemon.poll files.  Contains the uucp file.

RELATED INFORMATION

       Commands: cron(8), uucleanup(8), uusched(8), uuxqt(1)

       Files: /usr/lib/uucp delim off

																	uudemon(4)
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