Situation

An ITM6 Unix (UX) or Linux (LZ) agent detects that its remote filesystems are unavailable, a “stale” connection.

Automate an action to remount it if possible

Methodology

Two (2) ITM situations are created where

1. detects the mount point has become stale
   
2. the other is triggered by the “correlated situation” condition of #1 being tr
   

Situation #1 : Detect “Stale” remote FS

Simple enough – if “Space Available” fails collection, there is an issue

Situation #2 : Remount Situation

Formula Conditions

Use the “Situation Comparison” for a condition against the situation above

Take Action

Note: the lines are strung together on one line in the Take Action field, to make it more legible here, newlines are after the semicolons

f=”&{Linux_Disk.Mount_Point}” ;
u=`umount -f $f 2>&1 && echo $f`;
m=`mount $f 2>&1 && echo $f`;
echo -e “umount: $u\nmount:$m” | mail -s “ITM ACTION: Remount $f” junkmail@JdsMedia.net

Command: du (mneumonic: disk usage)

How can one get the disk usage of a directory, but didn’t want the directories which are mountpoints of other filesystems…

The disk usage calculation can be limited to the actual mounted partition with the -x flag.

## Notice the size differences below
tivoli@tivdzl01:~> du -smx /
11325   /

tivoli@tivdzl01:~> du -sm /
63478   /

[ NOTE : The size differences are due to df getting the filesystem info based on 512byte blocks ]